Building ventilation rate is a crucial factor in the indoor air quality (IAQ). Furthermore, building-related parameters (window geometry, building orientation, height, and shape) have a substantial impact on the ventilation rates. However, most building designs reported in the literature from various income group countries failed to fulfill the recommended ventilation standards. A systematic and critical review was conducted on the collated literature from the past 20 years using various databases, yielding 145 related articles. Building-related factors influencing the ventilation rates were thoroughly studied in different income groups. In addition, the existing ventilation rates in various building environments were examined. The data analysis of critical literature suggests that the ventilation rates in 80% of the building environments were found lower than the prescribed standards irrespective of the income group countries. Thus, the current study highlights the need for redesign of the existing or new buildings for meeting the adequate ventilation rates.

Purpose of ReviewHeavy and toxic metals are becoming more prevalent in the water sources of the globe, which has detrimental repercussions for both human health and the health of ecosystems. The summary of recent findings on treatment possibilities of toxic metal species by nanomaterials should facilitate the development of more advanced techniques of their removal.Recent FindingsThe high concentrations of chromium, mercury, and arsenic identified in wastewater cause a hazard to human health. There is a wide variety of nanoadsorbents and nanophotocatalysts used for heavy/hazardous metal removal. Recent research has resulted in the production of advanced nanostructures that exhibit extraordinary heavy/hazardous metal adsorption effectiveness and photocatalytic diminution of metal ions. These nanostructures have physically and chemically tunable features.SummaryIn this review article, the use of carbon-based nanomaterials, polymer-based nanomaterials, and semiconductor-based nanomaterials are extensively discussed to remove mercury, chromium, and arsenic ions from wastewater by the adsorption process. Advanced nanomaterials involved in photocatalytic reduction are also comprehensively discussed.

Exposure to heavy metals in indoor dust may affect human health and has gained increasing attention in recent years. However, the occurrence, sources, and health risks of heavy metals in indoor dust in China are still poorly understood, thus leading to certain knowledge gaps. This review systematically discussed the pollution characteristics and the associated health risks of heavy metals in indoor dust in China. Results show that the heavy metals in indoor dust in China are more serious than that in other countries with concentration distribution patterns of Zn > Mn > Pb > Cu > As > Cr > Ni > V > Co ≈ Cd > Hg. Mining and smelting activities, electronic waste recovery, and industrial production can increase heavy metal concentrations in indoor dust in sampling cities. Due to the variation of sources, significant spatial differences are observed among different regions and between rural and urban homes. Results from source apportionment show that mining activity and traffic are the dominant sources of indoor heavy metals. In comparison with adults, children have higher non-carcinogenic and carcinogenic risks due to more frequent ingestion of indoor heavy metals. Residents in South China are suffering from high carcinogenic risks due to high As occurrence levels. Children in South, East, and Southwest China are suffering from non-carcinogenic risks due to Pb exposure. To our theme, more studies, especially in rural homes, involved with more kinds of microenvironments are welcomed in the future. Meanwhile, in the premise of setting a standard guideline for a consistent target heavy metal, activity patterns should be considered when estimating the health risk. Results from this study are expected to provide crucial information for policymakers and researchers to alleviate indoor heavy metal pollution.Graphical Abstract

Purpose of ReviewThere is a growing interest in understanding the health effects of exposure to per- and polyfluoroalkyl substances (PFAS) through the study of the human metabolome. In this systematic review, we aimed to identify consistent findings between PFAS and metabolomic signatures. We conducted a search matching specific keywords that was independently reviewed by two authors on two databases (EMBASE and PubMed) from their inception through July 19, 2022 following PRISMA guidelines.Recent FindingsWe identified a total of 28 eligible observational studies that evaluated the associations between 31 different PFAS exposures and metabolomics in humans. The most common exposure evaluated was legacy long-chain PFAS. Population sample sizes ranged from 40 to 1,105 participants at different stages across the lifespan. A total of 19 studies used a non-targeted metabolomics approach, 7 used targeted approaches, and 2 included both. The majority of studies were cross-sectional (n = 25), including four with prospective analyses of PFAS measured prior to metabolomics.SummaryMost frequently reported associations across studies were observed between PFAS and amino acids, fatty acids, glycerophospholipids, glycerolipids, phosphosphingolipids, bile acids, ceramides, purines, and acylcarnitines. Corresponding metabolic pathways were also altered, including lipid, amino acid, carbohydrate, nucleotide, energy metabolism, glycan biosynthesis and metabolism, and metabolism of cofactors and vitamins. We found consistent evidence across studies indicating PFAS-induced alterations in lipid and amino acid metabolites, which may be involved in energy and cell membrane disruption.

Purpose of ReviewTriclosan (TCS), a widely used broad-spectrum antimicrobial agent, enters to wastewater treatment plants (WWTPs) and the environment ultimately after its usage. Notably, the use of TCS has surged during the outbreak of COVID-19, leading to the environment under increasing TCS pollution pressure. Even environmentally relevant concentrations of TCS can promote the development of antimicrobial resistance (AMR), which is a major public health concern. The purpose of this study is to provide a basis for the management and risk assessment of TCS by providing a holistic review of the impact of TCS on AMR in the environment.Recent FindingsBacterial resistance to TCS mainly takes place through modification or replacement of the FabI enzyme, which is the main target of TCS in bacteria. Currently, multiple FabI mutants and isoenzymes have been identified in the environment giving bacterial resistance to TCS. In addition, mechanisms by which TCS promotes bacterial development of resistance to other antimicrobials have been studied in laboratory experiments and environmental settings, such as anaerobic digester. TCS will promote the development of AMR in the environment with the possibility of adverse risks to public health.SummaryThis review systematically summarizes the mechanisms of bacterial resistance to antimicrobials driven by TCS and highlights the effects of TCS in promoting the horizontal transfer and enrichment of antibiotic resistance genes (ARGs). Suggestions for overcoming the limitations of laboratory-scale studies and further improving the risk assessment of TCS in the environment are proposed.

Organic ultraviolet (UV) filter compounds are crucial components of sunscreen products, which are used to absorb UV radiation. However, the increase in consumption of UV filters has led to environmental concerns about their impacts on the environment and human health. This review found that the high lipophilicity and stability of UV filters can cause bioaccumulation leading to a wide range of adverse ecological effects. UV filters’ concentration was detected in wastewater up to ppm, and their physicochemical characteristics such as the size of molecule, pKa, hydrophobicity, and solubility significantly control their fate in the environment. Among UV filter compounds, benzophenone 3 (BP-3) and benzophenone 4 (BP-4) are the most common in wastewater. Various removal technologies for UV filters have recently been applied, including membrane separation, adsorption, advanced oxidation processes, and phytoremediation. Among them, hybrid treatment processes such as membrane bioreactors (MBRs) can remove UV filter compounds from wastewater with a removal efficiency of up to 96% (i.e., octocrylene and benzophenone-3). Future investigation should focus on developing green/eco-friendly sunscreens to reduce hazard impacts on human health and the environment.Graphical Abstract

Purpose of ReviewHome composting is an effective way to treat household waste, but global uptake remains low because of insufficient recognition and technical limits. This review aims to promote the understanding, popularization, and application of home composting by summarizing the facilities, process performance, and product quality, and to sum up the crucial technical limits and potential solve methods.Recent FindingsHome composting studies are carried out in 20–1200 L composters for 3–12 months with kitchen and garden feedstocks. During the process, emission amounts of methane (CH4), nitrous oxide (N2O), and ammonia (NH3) are 0.002–2185 kg/Mg FW, 0.004–454 kg/Mg FW, and 0.025–972 kg/Mg FW, respectively. The thermophilic stage in home composting is insufficient for harmless requirement, while the home composting products could meet the standards for the use of organic fertilizer when the basic physical and chemical indicators, biological indicators, spectral indicators, and other indices are carried out in lab. Home composting products are non-toxic to plants and can promote plant growth. The crucial technical limits are caused by slow degradation of organic matter (OM), emission of greenhouse gases (GHGs) and a lack of maturity evaluation standard and directive for subsequent product utilization.SummarySuitable technology and evaluation standard could reduce gas emissions and improve maturity of home composting, which would provide an additional method for existing municipal waste management, therefore reducing the transportation and collection cost of household waste, and realizing the reduction, harmless, and resource recovery.

Purpose of ReviewThis review aims to summarize the occurrence of Cryptosporidium spp. and Giardia spp. in the reclaimed water and their risks in different reuse scenarios, analyze the drawbacks of protozoa detection methods, compare the removal efficiencies of different water treatment technologies, and propose potential management measures.Recent FindingsCryptosporidium spp. and Giardia spp. are widely present in the wastewater in the last decade, and the reclaimed water is usually used in agricultural irrigation, recreational activities, and urban reuse. The risks of protozoa infection are generally higher than the WHO defined 10−4 threshold in agriculture and recreational reuse and partial urban practices. The direct potable reuse with multiple advanced treatments has relatively low risk, while the indirect potable reuse is more risky due to the low removal efficiency of traditional drinking water treatment process. The newest protozoa detection standard applies a cheap way to measure (oo)cysts in high-turbidity water. But it still cannot distinguish live and dead (oo)cysts, and cannot identify pathogenic species. These defects result in the overestimation of the health risks. Potential solutions with fluorescence dye and molecular tools are proposed. About 4-log reduction is needed for agriculture and recreational scenarios with advanced treatments. While for urban reuse, lower log reduction might be achieved by secondary treatment with disinfection.SummaryThis review highlights the potential biorisks of Cryptosporidium spp. and Giardia spp. of the reclaimed water in various reuse scenarios and possible countermeasures to improve the safety issue. Suggestions for more accurate risk assessment and management strategies of protozoa control are proposed.

Purpose of ReviewThe ever-increasing environmental pollution concerns are demanding momentous efforts to clean and sustain the environment. Organic pollutants (OPs) have proven to be detrimental to numerous environmental settings, leading to changes in the food chain and the normal development of several species.Recent FindingsSeveral traditional remediation measures have been proposed, developed, and deployed to detect and mitigate OPs to tackle water pollution. However, many conventional physiochemical or simple biological remediation processes in practice remain inefficient with notable inadequacies. The inefficiency or inadequacy of traditional remediation of persistent OPs from the various environmental matrices, including water bodies, is a serious concern that requires new measures and catalytic tools to mitigate OPs in a sustainable manner. Photocatalytic degradation of OPs is a modern and sustainable technology that can take advantage of carbon nanomaterials like carbon dots (CDs) which possess photostability and high solubility in an aqueous solution while being inexpensive and low-toxic.SummaryIn this review, different technologies based on CDs and magnetic CD composites have been presented to examine their ability to photocatalytically degrade various organic contaminants. Finally, some upcoming perspectives and remaining obstacles are given on the future viewpoints of CDs.

Purpose of ReviewThis study was aimed at identifying the differences in the levels of 17 metals and elements (MEs) between fish species (Capoeta tinca and Squalius pursakensis) and fish tissues (muscle, gills, and liver), at identifying the effect of fish gender and fish size (length and weight) on bioaccumulation of MEs in tissues, at assessing both health risks and benefits of MEs in fish muscle, and at defining safe fish consumption quantities for consumers.Recent FindingsThe levels of most MEs in tissues did not differ significantly between both fish species. The gills had higher levels of most MEs than the liver and muscle. Only a few MEs in the tissues of both fish species demonstrated significant associations with fish length or weight. There were no significant differences between male and female fish in terms of the levels of most metals in tissues. The estimated daily intake (EDI) values of metals were below the reference doses. Target hazard quotient (THQ) and hazard index (HI) values were less than 1. Carcinogenic risk (CR) values were within or below the acceptable range. Also, maximum safe fish consumption quantities (MSCQs) were established for consumers.SummaryBecause both fish species were collected from the same water body and had the same habitat preferences, the levels of most MEs did not differ significantly in the tissues of both fish species. Because the gills and liver are metabolically active organs, they had higher levels of MEs than the muscle. The relationships between the levels of MEs in the tissues and fish size were both unclear and inconsistent. The results indicated that ME accumulation in tissues of individuals within the same species was not significantly influenced by gender. The THQ, HI, CR, and EDI values indicated that no adverse health consequences are expected for consumers. It was established that daily consumption of less than 50 g of C. tinca or 80 g of S. pursakensis would not be harmful to consumers’ health. Nutritional evaluation results indicated that both fish species are good sources of essential MEs. Therefore, consumption of the fish species would bring tremendous health benefits.

Purpose of ReviewThe biochar-supported zero valent iron (ZVI-BC) can effectively prevent oxidation and agglomeration of ZVI, and improve the utilization rate of ZVI. Recent reviews of ZVI-BC mainly focus on the preparation methods, characterization techniques, and reaction mechanism with pollutants. Since the structural characteristics of biochar have a great impact on Fe0 loading, a comprehensive review of the structural characteristics of biochar is needed to explain its influence on ZVI formation during preparation. And in application of ZVI-BC, the environmental effects on organisms need to be considered. This review of recent research results provides a perspective for understanding the structural characteristics, preparation factors, and ecotoxicity of ZVI-BC.Recent FindingsThe adsorption capacity of ZVI-BC prepared by conventional methods still needs to be improved. The surface-area-normalized reaction rate constant (kSA) of ZVI-BC can be increased to about 180 times by surface modification, adding a stabilizer, element doping, and other modification methods. Recent research on ecotoxicity has shown mostly positive effects of ZVI-BC on microorganisms, animals, and plants during environmental remediation.SummaryThis work reviews the effect of biochar as a support matrix on Fe0 production. The pollutant removal performance is summarized considering the elemental composition, phase components, and surface chemical properties. Also, we discuss the effect of ZVI-BC preparation on contaminant removal and propose methods to optimize the performance of ZVI-BC. The kSA was used to conduct a meta-analysis of kinetic data to illustrate the properties of ZVI-BC. In addition, we evaluate the ecotoxicity of using ZVI-BC in environmental remediation.Graphical Abstract

In the present study, a systematic review along with a meta-analysis was conducted based on relevant studies from 11 Asian countries (1999–2022, Scopus, PubMed, MEDLINE, ScienceDirect, and Google Scholar) to evaluate the crop-wise differences in the accumulation of trace element (TE) in the edible part of different crops (vegetables: leafy (LV), root (RV), fruit (FV); cereal crops: rice (RIC), wheat (WHE), maize (MAZ)). Based on the median concentration of the compiled data, the TE accumulation in different vegetable crops was ranked in the decreasing order of Fe > Zn > Mn > Cu > Ni > Cr > Pb > Co > Se > Cd > As, and in cereal crops, this is followed as Fe > Zn > Cu > Ni > Cr > Co > Pb > As > Se > Cd > Hg. A clear difference was found between vegetable categories, with a higher accumulation of most of the elements in LV, especially spinach, coriander, radish leaves, mustard, amaranthus, and pakchoi than other vegetable types. Root vegetables displayed higher bioconcentration factors (BCF) than the other two vegetable types. For cereal crops, higher metal contents were found in WHE followed by RIC and MAZ, but RIC had relatively higher BCF for certain metals (As, Cd, Cu, Cr, Ni) and WHE dominated for the remaining metals. When compared with the prescribed safe limits of the non-essential metals (As, Cd, and Pb), this study revealed that the majority of the vegetable and cereal crop contaminations were from Bangladesh, China, India, Iran, and Pakistan.

Purpose of ReviewIonic liquids (ILs) are organic salts composed of organic cations and organic/inorganic anions that are liquid at room temperature. ILs are considered “green” solvents; however, with the widespread application of ILs in the chemical industry, research has determined that ILs may persist in the soil environment and exert toxicological impact on ecological receptors. This paper reviews the status of ILs residues in soil, their effect on soil biota, limitations of current studies, and emerging research areas for ILs.Recent FindingsThe ILs change the physical and chemical properties of soil by reducing pH and improving electrical conductivity. Ionic liquids may be absorbed by plants and animals, causing oxidative stress and DNA damage. Exposure to ILs may also impact soil microorganisms, changing the structure of soil microbial community, and impacting their functionality.SummaryThis review highlights that IL fate and transport are influenced by the size of the alkyl chain. Those with longer carbon chains with the same anion, normally have smaller median lethal concentrations (LC50) to earthworms, which indicates that IL toxicity increases with increasing carbon chain length. As such, the relationship between structure, mobility, and toxicity should be considered in the development and application of ILs. In the future, long-term monitoring of ILs residues and distribution in the environment will be required. Degradation products and the toxicity of degradation products should also be further identified.Graphical AbstractThis paper summarized the ways in which ILs enter the soil environment, identified methods for the detection of ILs in environmental matrices, and detailed the environmental behavior (absorption, transfer/biological uptake, and degradation) of ILs in soil including ecological impacts on invetebrates, plants, and microorganisms.

Purpose of ReviewIn countries such the USA, Iran, and Turkey, pistachio nut is considered one of the most economically valuable agricultural products. Pistachio production and related dehulling processes generate a large quantity of organic waste, containing green hull, cluster woody part, shells, and leaves. The inadequate conventional management of such wastes calls for sustainable and economical strategies not only to enhance resource efficiency but also to create value.Recent FindingsPistachio residues have a high content of total extractives and essential oils and a considerable amount of phenolic compounds that explain their good antioxidant activities and other potential human health benefits. Furthermore, considering the generation volume (about 660,000 tons) and lignocellulosic structure, pistachio residues can also be sustainably used to produce value-added products, such as biofuels, phytochemicals, activated carbon, and other potential bioproducts such as filamentous fungi as protein enriched biomass, single-cell protein (SCP), and volatile fatty acids. In general, recent studies have not comprehensively investigated all value-added potential products.SummaryThis review provides a thourough insight into the present pistachio processing industries, and pistachio waste chemical composition and characteristics. Furthermore, the applications of pistachio residues as a renewable source for the production of potential value-added products by various thermochemical (pyrolysis, gasification, and liquefaction), physicochemical (solvent extraction, ultrasound-assisted extraction (UAE), microwave-assisted extraction (MAE), and extraction by pressurized liquids (PLE)), and biological (anaerobic digestion (AD) and fermentation (solid-state and submerged)) processes are presented including an analysis of the advantages and disadvantages of such methods. In this regard, production of new products such as edible filamentous fungi and antioxidant, and their market appeal has been briefly considered.

Purpose of ReviewThis review aims to analyze the effects of the pandemic on the world’s sound environment.Recent FindingsThe confinements associated with the pandemic led to a reduction in sound levels worldwide and a change in the perception of soundscapes in the absence of traffic noise and human-generated noise.SummaryIn response to the COVID-19 pandemic, many countries and regions around the world adopted a series of interventions in 2020 that have been referred to as “lockdown” or “confinement.” These sets of restrictions had a clear and obvious consequence derived from the absence of people in the streets and the reduction of daily activity and commuting, which caused an unprecedented silencing on a large scale. Along with the silence that ensued, the pandemic and the confinements affected acoustics and our relationship with sounds on different scales. In the cities, this phenomenon had a strong reduction in acoustic intensity due to the absence of vehicles on the streets. Perhaps this was more perceptible in our neighborhoods, with notable changes in their soundscapes, first due to the absence of people in the streets and later due to more outdoor activity derived from the fear of the spread of the virus in indoor spaces. The longer periods of time spent in our homes during the lockdowns also highlighted the importance of sound insulation in buildings and the acoustic conditioning of our schools or homes.

Purpose of ReviewDigested manure effluent is a potential resource for the production of liquid organic fertilizer and reused water. The purpose of this review is to provide a comprehensive understanding on the advances and challenges to high-value processing and utilization for digested manure effluent treatment.Recent FindingsThe main problem that restricts the utilization of digested manure effluent is that there is not enough land for consumption. Reasonable and efficient treatment of digested manure effluent is the key to promoting healthy development and sustainable operation. Digested manure effluent can increase yield, improve quality, and enhance the stress resistance of crops. In addition, digested manure effluent can also be used in seed soaking and feed applications. Membrane treatment techniques for the concentration of digested manure effluent can recover water and produce liquid fertilizer. It mainly includes pressure-driven membrane, osmotic-driven membrane, membrane distillation, and their combined technologies. However, membrane concentration of digested manure effluent still has challenges such as high cost and membrane fouling that restrict development. Thus, several potential approaches have been proposed to address these challenges. These approaches can be largely classified as pretreatment, process optimization, and government-guided source control.SummaryIn this paper, we critically reviewed the properties and utilization of digested manure effluent. Meanwhile, the performance of different membrane concentration processes was provided. Furthermore, key technical challenges of high-value processing and their potential countermeasures were delineated.

Purpose of ReviewDespite genetic, metabolic, and enzymatic studies of xenobiotic-degrading microbe(s), bioremediation has remained inefficient at the field level. The microbial eco-physiological traits and bio-geological constraints imposed are the key hurdles. Therefore, it is imperative to comprehend how microbes survive, adapt, and overcome such constraints at the impacted niches. Furthermore, given the urgency of climate smart innovations, “microbe-driven trash-to-treasure conversion” is of the highest concern. The purposes of this review are to highlight the importance of assistive microbial responses/traits in overcoming bio-geochemical constraints for improved adaptability and to develop cleaner routes to recover value-added products during biodegradation.Recent FindingsThe use of specialized microbes with efficient xenobiotic/aromatic pollutant-degrading abilities, known as “bioremediation”, is a promising and eco-friendly alternative. These specialized microbes elicit a variety of cellular responses (eco-physiology traits) like chemotaxis, cell surface modifications, substrate utilization hierarchy, metabolic pathway compartmentalization, and stress management to adapt, survive, and colonize at contaminated niche as well as degrade aromatics efficiently. Recently developed system biology and metabolic engineering tools have also enabled to design-build-analyse and engineer pathways for better remediation with simultaneous recovery of value-added products, thus contributing to the circular bio-economy.SummaryEfficient pollutant-degrading microbes endowed with assistive cellular traits like preferential degradation; robust stress management; compartmentalization of pathway; genetic, enzymatic, and regulonic stability; and plant growth–promoting ability are important to mitigate noxious effects of xenobiotics. Use of metabolic pathway engineering in conjunction with bioelectrochemical treatments/biorefineries having compatible consortia and efficient as well as stable enzymes will further enhance desired catalytic activities and expand the metabolic repertoire for efficient treatment-cum-resource recovery.

Purpose of ReviewAtmospheric aerosol from both natural and anthropogenic activities has long been acknowledged as one of the important factors influencing regional and global climate change. Many regions around the globe experienced high aerosol loadings because of intensive emissions, yet the roles of atmospheric aerosols in extreme meteorological and air pollution events have not been well demonstrated due mainly to the complexity of atmospheric physical and chemical interaction at mesoscale and even microscale. Here, we present a comprehensive review of current understanding on the role of atmospheric aerosols in the development and evolution of extreme meteorological events, including monsoon circulation, heat waves, extreme rainfall, tornadoes, and severe air pollution.Recent FindingsAerosols could participate in the development of meteorological systems through direct and indirect effects. Large-scale precipitation from shallow stratiform clouds was found to be suppressed by aerosols, while invigoration effects contribute to deep convection and even catastrophic floods in local areas. The occurrence of high-impact weather such as tornadoes and tropical cyclone is also related to aerosol concentration and distribution. Moreover, a positive feedback between aerosols and boundary layer meteorology is proposed as an important factor conducive to heavy haze pollution over urban areas.SummaryThe work underscores the great importance of aerosols’ meteorological feedback in extreme weather events. Integrated observations and seamless coupling of meteorology and atmospheric chemistry in models are highlighted for future studies to fill the knowledge gap in current research.

Purpose of ReviewExtreme weather including heat waves, droughts, and extreme precipitation can impact the microbiological risks of drinking water in complex and comprehensive ways. These impacts are especially concerned with coastal cities due to the higher frequency and intensity of extreme weather. This review was aimed at summarizing these impacts from the view of different parts of drinking water systems including water sources, drinking water treatment plants (DWTPs), and drinking water distribution systems (DWDSs).Recent FindingsAll extreme weather will pose microbiological threats to drinking water quality. However, the threats are realized in direct or indirect ways. In the former, the extreme weather itself can alter the microbial biomass, growth rate, activity, and tolerance. In the latter, it will first change the physicochemical water parameters and/or the performance of the water treatment processes and then impact microbes. Meantime, extreme weather can result in the induction, occurrence, and removal of emerging microbiological contaminants, thus making the situation more complicated.SummaryThis review summarized the potential impacts of extreme weather on microbiological risks of drinking water in coastal cities. It also analyzed the interactive relationship between extreme weather and microbes. However, many knowledge gaps remained for this issue. The occurrence, transportation, control, and removal mechanism/methods of microbial contaminants under the background of climate change should be further investigated.Graphical Abstract

Purpose of ReviewFine particulate matter (PM2.5) is a huge environmental challenge in China. Based on field studies, secondary organic aerosols (SOA) contribute greatly to PM2.5 formation in many locations. Modeling SOA is a frontier research field in air quality and a rapidly developing field internationally. This review intends to provide a state-of-the-art understanding of the current status of SOA modeling in China and recommendations for future research.Recent FindingsSOA has been shown to exhibit significant spatial and seasonal variations in China. The traditional pathway of SOA from the condensation of semi-volatile products by the oxidation of volatile organic compounds (VOCs) tends to significantly underestimate the observations. This gap has been greatly improved by considering new pathways such as the heterogeneous reactions of dicarbonyls and epoxides, the aging of primary organic aerosols and SOA, the oxidation of semi- and intermediate VOCs from emissions, and the aqueous-phase reactions of water-soluble organic species. In addition to these mechanisms, the contributions of specific precursors and sources also depend on the emission inventory of precursors, which has significant uncertainties. The interactions between anthropogenic and biogenic sources and meteorological facteros affect SOA formation. Overall, SOA plays an essential role in the budget of solar radiative forcing and the new particle formation.SummaryThis review focuses on the advances in modeling SOA in China since 2000. Parameterization of SOA mechanisms and properties and the emission and meteorology inputs should be improved to understand the characteristics and influences of SOA in China.