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SSRN 2024年

作者： Ge, Jingwen Wu, Song Wu, Haotian Lin, Jianyu Cai, Yijun Zhou, Dongmei Gu, Xueyuan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing China Nanjing University China

Although the mobility of arsenic (As) and cadmium (Cd) in soils during the flooding-drainage process has been intensively studied, quantifying their dissolution among various soils still remains a challenge. After comprehensively monitoring multiple parameters related to As and Cd dissolution in 8 soils for a 60-day anaerobic incubation, the redundancy analysis (RDA) and structural equation model (SEM) were employed to identify the key factors and influencing pathways controlling the dynamic release of As and Cd. Results showed that pH alone explained 90.5% Cd dissolution, while the dissolved-Fe(II) and 5M-HCl extractable Fe(II) jointly only explained 50.6% As dissolution. After data normalization, the ratio of Fe(II) to 5M-HCl extracted total Fe (i.e. / ) significantly improved the correlation to R2= 0.824 (p © 2024, The Authors. All rights reserved.

关键词： Dissolution

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Remediation of arsenic contaminated soil by sulfidated zero-valent iron

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 85-95页

作者： Junlian Qiao Yang Liu Hongyi Yang Xiaohong Guan Yuankui Sun State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092China

In this study,the influences of sulfidation on zero-valent iron(ZVI)performance toward As(Ⅴ)immobilization in soil were systemically *** was found that,compared to unamended ZVI,sulfidated ZVI(S-ZVI)is more favorable to immobilize As(Ⅴ)in soil and promote the conversion of water soluble As to less mobile Fe-Mn bound ***,under the optimal S/Fe molar ratio of 0.05,almost all of the leached As could be sequestrated by>0.5 wt.%S-ZVI within 3 *** the presence of HA could decrease the desorption of As from soil,HA inhibited the reactivity of S-ZVI to a greater *** experiments further proved the feasibility of applying S-ZVI on soil As(Ⅴ)*** importantly,to achieve a good As retention performance,S-ZVI should be fully mixed with soil or located on the downstream side of As *** test simulating the flooding conditions in rice culture revealed there was also a good long-term stability of soil As(Ⅴ)after S-ZVI remediation,where only 0.7%of As was desorbed after 30 days of *** separation was employed to separate the immobilized As(Ⅴ)from soil after S-ZVI amendment,where the separation efficiency was found to be dependent of the iron dosage,liquid to soil ratio,and reaction *** characteristic leaching procedure(TCLP)tests revealed that the leachability of As from soil was significantly reduced after the S-ZVI amendment and magnetic separation *** these findings provided some insights into the remediation of As(Ⅴ)-polluted soil by ZVI.

关键词： Soil As(Ⅴ) Sulfidation Zero-valent iron Magnetic separation

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Toward sustainable food systems: global initiatives and innovations

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Frontiers of Agricultural Science and Engineering 2024年第1期11卷 197-209页

作者： Xiangwen FAN Xiaomeng ZHANG Xiaofei WU Wenqi MA Zhaohai BAI Lin MA State Key Lab Pollution Control&Resource Reuse School of EnvironmentNanjing UniversityNanjing 210023China College of Resources and Environmental Sciences Hebei Agricultural UniversityBaoding 071000China College of Food Science and Biology Hebei University of Science and TechnologyShijiazhuang 050018China

A recent UN Sustainable Development Goals(SDGs) analysis indicated a significant regression in the global SDG goal scores, particularly in SDG 2—Zero Hunger. The emissions of environmental pollution caused by meeting food demands have prompted some countries to intensify their climate change mitigation efforts. These circumstances have introduced significant uncertainty to the future global sustainable food development. Additionally, a notable global challenge is the persistence of hidden hunger, primarily characterized by the insufficient consumption of high-quality animal protein. Addressing this issue would necessitate increased environmental costs to attain high-quality food security. The future food system presents a significant challenge in coordinating food security, food quality and environmental quality. This article presents a comprehensive review and proposes a three-step strategy for future agricultural development based on food security, quality, and environmental aspects. This is a novel food system transfer strategy, as it concurrently addresses both global food security and environmental thresholds. It involves the construction of an efficient food system that operates within the constraints of environmental limits. The objective is to align with global SDG indicators and to maintain natural resource consumption and pollutant emissions within planetary boundaries.

关键词： Agricultural green development food system food production optimization transform pathways

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Stability Optimization of Iron-Based Catalysts: Application of Cr-Enriched Alloy Steel Catalyst in Ozonation Pharmaceutical Wastewater

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SSRN 2024年

作者： Xiao, Siqi An, Wenhui Ma, Luming State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Catalytic ozonation for advanced treatment of industrial wastewater has proved to be effective, and the stability of the catalyst is crucial for the long-term application of the ozonation process in practical engineering. In this study, the electrochemical characteristics of four iron shavings: alloy steels (38CrMoAl and 40Cr) and carbon steels (A3 and 45#) were investigated, and a new citric acid-optimized H2O2 modification method was proposed. The low open circuit potential (OCP) of carbon steels indicated that they have higher reactivity and require shorter modification times. The higher the OCP of alloy steels, the more H2O2 concentration was required to enhance modification efficiency. By adding citric acid, the rapid modification of alloy steel was achieved, and the catalysts exhibited lower passivation current (Ip), indicating a lower rate of substrate loss and a longer lifetime of alloy steel catalysts. Furthermore, Cr enrichment occurred in the oxide layer of alloy steel catalysts. The Cr/Fe (atomic ratio) in oxide layer for 38CrMoAl and 40Cr increased from 0.018 to 0.040 and from 0.010 to 0.037, respectively. The presence of CrOOH and Cr2O3 within the oxide layer to reinforce the layer’s overall structural integrity and enhance its protection for the internal substrate, making the catalysts more resistant to adapt to high-salinity wastewater. Through laboratory tests, it was found that among the four catalysts, 38CrMoAl showed the highest stability and good catalytic activity with low iron loss concentration. Therefore, the pilot-scale application effect of 38CrMoAl catalyst was evaluated. In the advanced treatment of pharmaceutical wastewater, the Chemical oxygen demand (COD) and total organic carbon (TOC) removal was 56.3% and 32.4%, respectively. These results showed that the stability of catalyst can be improved by optimizing the selection of steel, and the introduction of citric acid achieved Cr enrichment effect and amplified the potential stability

关键词： Stability

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Sulfamethoxazole Removal and Ammonium Conversion in Microalgae Consortium: Physiological Responses and Microbial Community Changes

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SSRN 2024年

作者： Iyobosa, Eheneden Wang, Rongchang Chen, Gaoxiang Blessing, Adesina Odunayo Haijing, Ren Bavumiragira, Jean Pierre Zhao, Jianfu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Microalgae (Mychonastes sp.) consortium was investigated for nutrient and antibiotics removal and its responses to varying sulfamethoxazole (SMX) concentrations (0-1000 µg/L) in ammonia-rich wastewater. The results showed that the introduction of SMX (100-1000 µg/L) slightly improved ammonium nitrogen removal efficiency instead of inhibition. Swift SMX degradation was observed across all SMX treated systems, with the highest SMX removal efficiency (96%) at SMX concentration of 100 µg/L. Biodegradation remained the dominant SMX removal mechanism, contributing 78% of SMX removal at SMX concentration of 800 µg/L, while adsorption and photolysis played minor roles. Addition of SMX augmented biomass and lipid productivity, but decreased chlorophyll contents in the microalgae consortium. Furthermore, extracellular polymeric substance (EPS) production correlated positively with SMX input concentration, with the microalgae consortium exposed to 800 µg/L SMX displaying the most pronounced stimulation of proteins production (51.5 ± 2.0 mg/g DCW) and polysaccharides production (74.8 ± 3.9 mg/g DCW). In response to increase in SMX concentrations, enzyme activities associated with antioxidant defense, such as superoxide dismutase (SOD), peroxidase (POD) and malondialdehyde (MDA) increased, while catalase (CAT) decreased, indicating an initial defense mechanism. Concurrently, the relative abundance of Mychonastes sp. within the consortium rose from 87% at 300 µg/L SMX to 99.9% at 800 µg/L SMX, while Shannon indices of the bacterial community increased from 1.415 to 2.867. This shift inhibited the initially dominant Saprospiraceae bacteria, facilitating the profound increase of adapted Aquimonas. These findings demonstrate the feasibility of simultaneous removal of antibiotic and nutrients from wastewaters with microalgae consortium system. © 2024, The Authors. All rights reserved.

关键词： Microalgae

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Destabilization of colloidal particles induced by in-situ calcium carbonate crystallization with implications on highly-efficient removal of insoluble matter from anaerobic digestate liquor

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Separation and Purification Technology 2025年 370卷

作者： Feng, Jieling Chai, Xiaoli Dai, Xiaohu Wu, Boran State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Efficient solid–liquid separation of anaerobic digestate liquor (ADL) is hindered by colloidal-sized suspended solids (SS), which negatively affect subsequent biological treatments. This study presented a novel approach in which in-situ crystal formation induced destabilization of colloidal particles in ADL, and the co-precipitation of insoluble organic matter with high-density crystal particles improved SS removal. Primarily, the optimal SS removal of 96.1 % was achieved with 1.0 wt% CaCl2 at an initial pH of 13. Destabilization of colloidal particles in ADL, supported by increased Turbiscan Stability Index (TSI), particle downward migration rates, and particle diameter, was monitored using a Turbiscan multiple light scattering analyzer. Mechanistic analysis revealed that the in-situ formed crystals primarily consisted of CaCO3, which formed from the added Ca2+ and inherent CO32– ions in ADL (the major background carbonate species at high pH). Precipitate porosity analysis revealed that CaCO3 efficiently adsorbed colloidal particles, which were then separated from ADL via co-precipitation. Furthermore, the interfacial free energy of adhesion of CaCO3 to colloidal particles was significantly higher than the self-cohesion energy of colloidal particles, suggesting a greater tendency for co-precipitation with CaCO3 rather than remaining dispersed. This interaction was the key mechanism for enhanced removal of insoluble matter from CaCl2-treated ADL. These findings suggest in-situ crystallization as an effective method for SS removal from ADL, reducing the biological load while maintaining alkalinity, which facilitates subsequent biological treatment represented by anaerobic ammonia oxidation (ANAMMOX). © 2025 Elsevier B.V.

关键词： Coprecipitation

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Steam disinfection releases micro(nano)plastics from silicone-rubber baby teats as examined by optical photothermal infrared microspectroscopy (vol 17, pg 76, 2022)

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NATURE NANOTECHNOLOGY 2022年第6期17卷 672-672页

作者： Su, Yu Hu, Xi Tang, Hongjie Lu, Kun Li, Huimin Liu, Sijin Xing, Baoshan Ji, Rong State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China Quantum Design (Beijing) Co. Ltd Beijing China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing China Stockbridge School of Agriculture University of Massachusetts Amherst MA USA

Silicone-rubber baby teats used to bottle-feed infants are frequently disinfected by moist heating. However, infant exposure to small microplastics (0.66 million elastomer-derived micro-sized plastics (MPs) (roughly 8... 详细信息

Silicone-rubber baby teats used to bottle-feed infants are frequently disinfected by moist heating. However, infant exposure to small microplastics (<10 μm) potentially released from the heated teats by hydrothermal decomposition has not been studied, owing to the limitations of conventional spectroscopy in visualizing microplastic formation and in characterizing the particles at the submicrometre scale. Here both the surfaces of silicone teats subjected to steam disinfection and the wash waters of the steamed teats were analysed using optical-photothermal infrared microspectroscopy. This new technique revealed submicrometre-resolved steam etching on and chemical modification of the teat surface. Numerous flake- or oil-film-shaped micro(nano)plastics (MNPs) (in the size range of 0.6–332 μm) presented in the wash waters, including cyclic and branched polysiloxanes or polyimides, which were generated by the steam-induced degradation of the base polydimethylsiloxane elastomer and the polyamide resin additive. The results indicated that by the age of one year, a baby could ingest >0.66 million elastomer-derived micro-sized plastics (MPs) (roughly 81% in 1.5–10 μm). Global MP emission from teat disinfection may be as high as 5.2 × 1013 particles per year. Our findings highlight an entry route for surface-active silicone-rubber-derived MNPs into both the human body and the environment. The health and environmental risks of the particles are as yet unknown.

关键词： Environmental health and safety issues Imaging techniques Materials Science general Nanotechnology Nanotechnology and Microengineering

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Understanding the risks of mercury sulfide nanoparticles in the environment: Formation, presence, and environmental behaviors

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Journal of Environmental Sciences 2022年第9期34卷 78-92页

作者： Pei Lei Nan Zou Yujiao Liu Weiping Cai Mengjie Wu Wenli Tang Huan Zhong State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing 210023China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Environmental and Life Sciences Program(EnLS) Trent UniversityPeterborough OntarioK9L 0G2Canada

Mercury(Hg) could be microbially methylated to the bioaccumulative neurotoxin methylmercury(Me Hg), raising health concerns. Understanding the methylation of various Hg species is thus critical in predicting the Me Hg risk. Among the known Hg species, mercury sulfide(HgS) is the largest Hg reservoir in the lithosphere and has long been considered to be highly inert. However, with advances in the analytical methods of nanoparticles, HgS nanoparticles(HgS NPs) have recently been detected in various environmental matrices or organisms. Furthermore, pioneering laboratory studies have reported the high bioavailability of HgS NPs. The formation, presence, and transformation(e.g., methylation) of HgS NPs are intricately related to several environmental factors, especially dissolved organic matter(DOM). The complexity of the behavior of HgS NPs and the heterogeneity of DOM prevent us from comprehensively understanding and predicting the risk of HgS NPs. To reveal the role of HgS NPs in Hg biogeochemical cycling, research needs should focus on the following aspects: the formation pathways, the presence, and the environmental behaviors of HgS NPs impacted by the dominant influential factor of DOM. We thus summarized the latest progress in these aspects and proposed future research priorities, e.g., developing the detection techniques of HgS NPs and probing HgS NPs in various matrices, further exploring the interactions between DOM and HgS NPs. Besides, as most of the previous studies were conducted in laboratories, our current knowledge should be further refreshed through field observations, which would help to gain better insights into predicting the Hg risks in natural environment.

关键词： Bioavailability Bioaccumulation Organic matter Mercury methylation Dissolution Aggregation

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Elevated Atmospheric CO_(2)Reduced Antibiotics Accumulation in Rice Grains and Soil ARGs Abundance in Multiple Antibiotics-contaminated Paddy Fields

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Chemical Research in Chinese Universities 2023年第3期39卷 455-464页

作者： WANG Yabo XU Meiling WANG Xiaojie AI Fuxun DU Wenchao YIN Ying JI Rong GUO Hongyan State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing210023China Joint International Research Centre for Critical Zone Science-University of Leeds and Nanjing University Nanjing UniversityNanjing210023China School of Environment Nanjing Normal UniversityNanjing210036China College of Environmental Science and Engineering Yangzhou UniversityYangzhou225127China

Antibiotic resistance genes(ARGs)as new pollutants have become a global environmental pollution problem in recent *** atmospheric CO_(2) is one of the major factors affecting global climate ***,the impacts of elevated CO_(2) on soil ARGs in multiple antibiotics-contaminated paddy soils are largely *** this study,six antibiotics including sulfadiazine(SDZ),sulfamethoxazole(SMZ),tetracycline(TC),oxytetracycline(OTC),enrofloxacin(ENR),and ciprofloxacin(CIP)were selected to investigate their combined effects on rice biomass,antibiotics accumulation,soil bacterial community and ARGs under elevated CO_(2) *** showed that elevated CO_(2) significantly reduced the accumulation of SMZ,OTC,ENR,and CIP in rice grains by 18.98%,20.07%,41.73%,and 44.25%,*** CO_(2) could affect soil microbialβ-diversity,and tend to reduce the microbial functions of human diseases,organismal systems,and genetic information *** addition,elevated CO_(2) significantly decreased the abundance of sulfonamide ARGs,tetracycline ARGs,and quinolone ARGs by 19.59%,18.58%,and 28.96%,respectively,while increased that of multidrug ARGs by 11.54%.Overall,this study emphasized that elevated CO_(2) may mitigate the threat of antibiotics contamination to rice food security but aggravate the environmental risk of multidrug ARGs in soil,contributing to a better understanding of the consequences of elevated CO_(2) levels on food security and soil ecological health in multiple antibiotics-contaminated paddy fields.

关键词： Antibiotics Antibiotic resistance gene(ARG) Bacterial community Elevated CO_(2) Rice

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Same stimuli,different responses:a pilot study assessing air pollution visibility impacts on emotional well-being in a controlled environment

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Frontiers of Environmental Science & Engineering 2023年第2期17卷 71-81页

作者： Jianxun Yang Qi Gao Miaomiao Liu John S.Ji Jun Bi State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) Nanjing University of Information Science&TechnologyNanjing 210044China Vanke School of Public Health Tsinghua UniversityBeijing 100084China Global Health Research Center Duke Kunshan UniversityKunshan 215316China

A growing number of studies have shown that impaired visibility caused by particulate matter pollution influences emotional ***,evidence is still scant on how this effect varies across individuals and over repetitive visual exposure in a controlled ***,we designed a lab-based experiment(41 subjects,6 blocks)where participants were presented with real-scene images of 12 different PM_(2.5) concentrations in each *** valence(negative to positive)and arousal(calm to excited)were self-rated by participants per image,and the response time for each rating was *** find that as pollution level increases from 10 to 260µg/m3,valence scores decrease,whereas arousal scores decline first and then bounce back,following a U-shaped *** air quality deteriorates,individual variability decreases in hedonic valence but increases in *** blocks,repetitive visual exposure increases valence at a moderate pollution level but aggravates negative emotions in severely polluted conditions(>150µg/m3).Finally,we find females,people who are slow in making responses,and those who are highly aroused by clean air tend to express more negative responses(so-called negativity bias)to ambient pollution than their respective *** results provide deeper insights into individual-level emotional responses to dirty air in a controlled *** the findings in our pilot study should only be directly applied to the conditions assessed herein,we introduce a framework that can be replicated in different regions to assess the impact of air pollution on local emotional wellbeing.

关键词： Air pollution Emotional wellbeing Variability Visual exposure Emotional bias

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