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SSRN 2023年

作者： Liang, Zhengxiong Liu, Suo Su, Yifan Zeng, Yufei Xie, Changyi Gao, Qun Lei, Jiesi Li, Baochan Wang, Mei Dai, Tianjiao Ma, Liyuan Fan, Fenliang Yang, Yunfeng Liu, Xuehua Zhou, Jizhong Guo, Xue State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing China School of Geographical Sciences South China Normal University Guangzhou China School of Water Resources and Environment China University of Geosciences Beijing China School of Environmental Studies China University of Geosciences Wuhan China Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China Institute for Environmental Genomics University of Oklahoma NormanOK United States Department of Microbiology and Plant Biology University of Oklahoma NormanOK United States Earth and Environmental Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA United States State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing China

Soil in high latitude and altitude cold regions contains over half of the carbon stored in soils globally, so decomposition of soil organic carbon (SOC) induced by climate warming could release huge carbon dioxide to the atmosphere, amplifying climate warming. However, it is still unclear how the SOC stocks will change when the ecosystem reaches the climax of succession under warming. This is mainly because the turnover times of SOC in cold regions exceeds hundreds or even thousands of years, much longer than the periods of artificial warming experiments. In this study, we used natural geothermal warming gradients in a Tibetan alpine grassland to determine the potential "climax" of SOC stock change and underlying microbial mechanisms. SOC stocks were significantly lost by 17.4%~27.0% under high-levels of warming (+4~+6 oC), but remained unchanged under low-level of warming (+2 oC). The losses of SOC stocks were primarily from mineral-associated organic carbon, rather than unprotected particulate organic carbon. The shifts of microbial communities and associated decline of microbial carbon use efficiency substantially contributed to the shifts of SOC stocks under different warming gradients. This observed SOC losses at the succession climax of alpine grassland by high-level warming provide strong empirical support for the positive soil carbon-climate feedback in cold regions, which could not be concluded from short-term experiments or based on increases of CO2 effluxes alone. The divergent responses of SOC stocks to different warming gradients suggest that models must represent these heterogeneous carbon dynamics for projecting future climate warming scenarios. © 2023, The Authors. All rights reserved.

关键词： Soils

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Effect of calcination temperatures on ammonia selective catalytic oxidation by Cu/SSZ-13 catalysts 3

Effect of calcination temperatures on ammonia selective cata...

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3rd International Symposium on Resource Exploration and environmental Science, REES 2019

作者： Guo, Jingjing Li, Junhua School of Environment Tsinghua University Beijing China State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing China National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment Beijing China

The Cu/SSZ-13 catalysts prepared by the impregnation method were applied to ammonia selective catalytic oxidation (NH3-SCO). The effect of the calcination temperature on the catalytic performance was inverstigated. The structural and physico-chemical properties of the catalysts were investigated by XRD, N2 adsorption-desorption isotherms, XPS, NH3-TPD and H2-TPR. It is found that the increase of calcination temperature favors the ammonia conversion at low temperatures. Meanwhile, overhigh calcination temperature (>500 °C) would lead to the decrease of catalytic activity. The Cu/SSZ-13-500 catalyst shows the highest catalytic performance and exhibits more than 70% NH3 conversion at 200 °C. The NH3-TPD and H2-TPR results confirmed that Cu/SSZ-13-500 owned more Lewis acid sites and CuO species, which were beneficial for ammonia adsorption and activation. © Published under licence by IOP Publishing Ltd.

关键词： Catalyst activity

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Freestanding Catalytic Membranes Assembled from Blade-Shaped Prussian Blue Analog Sheets for Flow-Through Degradation of Antibiotic Pollutants

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SSRN 2022年

作者： Li, Jiaxin Yi, Huiyu Shen, Yi Li, Yungui Fang, Qile Research and Development Center for Watershed Environmental Eco-Engineering Beijing Normal University Zhuhai519087 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Hangzhou310032 China Sichuan Provincial Sci-Tech Cooperation Base of Low-cost Wastewater Treatment Technology Department of Environmental Engineering Southwest University of Science and Technology Mianyang621010 China China West Normal University China

Membrane catalysis is a frontier technology for effectively removing organic containments, and burgeoning membranes assembled from two-dimensional (2D) materials have significantly flourished in peroxymonosulfate (PMS)-based catalytic membrane processes. Here, a bottom-up strategy based on restricting CoFe Prussian blue analog (PBA) crystal growth in one direction is used to fabricate large-scale 2D blade-shaped PBA sheets, whose radial size and thickness can be adjusted by the precursor ion ratio (CoII/FeII). The stripe CoFe PBA sheets can directly serve as building blocks and are simply assembled into a free-standing 2D membrane by interweaving assembly. The assembled CoFe PBA catalytic membrane possesses excellent wetting properties, guaranteeing an unimpeded mass transfer process, which leads to a superior instantaneous catalytic performance for the antibiotic norfloxacin during the continuous and flow-through membrane catalytic process. SO4•− and 1O2 are demonstrated to be the main active species, which synergistically contribute to the PMS-driven organic degradation. © 2022, The Authors. All rights reserved.

关键词： Antibiotics

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Insights into the phenomenon of an explosive growth and sharp decline in haze:A case study in Beijing

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Journal of environmental Sciences 2019年第10期31卷 122-132页

作者： Wenguang Li Xingang Liu Yuanhang Zhang Qinwen Tan Miao Feng Mengdi Song Lirong Hui Yu Qu Junling An Haokai Gao State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing 100875 China State Key Joint Laboratory of Environment Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing 100871 China Chengdu Academy of Environmental Sciences Chengdu 610072 China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Environmental monitoring station of Tianjin Port Free Trade Zone Tianjin 300308 China

A severe haze episode occurred in winter in the North China Plain(NCP),and the phenomenon of an explosive growth and sharp decline in PM2.5(particulate matter with an aerodynamic diameter equal to or less than 2.5μm)concentration was *** study the systematic causes for this phenomenon,comprehensive observations were conducted in Beijing from November 26 to December 2,2015;during this period,meteorological parameters,LIDAR data,and the chemical compositions of aerosols were *** haze episode was characterized by rapidly varying PM2.5 concentration,and the highest PM2.5 concentration reached 667μg/*** the haze episode,the NCP was dominated by a weak high-pressure system and continuously low PBL(planetary boundary layer)heights,which are unfavorable conditions for the diffusion of *** large increases in the concentrations of SNA(SO42-,NO3-and NH4+)during the haze implied that the formation of SNA was the largest *** vapor also played a vital role in the formation of haze by promoting the chemical transformation of secondary pollutants,which led to higher PM2.5 *** spatial distributions of PM2.5 in Beijing at different times and the backward trajectories of the air masses also indicated that pollutants from surrounding provinces in particular,contributed to the higher PM2.5concentration.

关键词： Haze episodes Explosive growth Sharp decline Beijing

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The non-negligible environmental risk of recycling halogenated flame retardants associated with plastic regeneration in China

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Science of the Total environment 2019年 646卷 1090-1096页

作者： Cao, Zhiguo Chen, Qiaoying Li, Xiaoxiao Zhang, Yacai Ren, Meihui Sun, Lifang Wang, Mengmeng Liu, Xiaotu Yu, Gang Ministry of Education Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control School of Environment Henan Normal University Xinxiang 453007 Henan China Beijing Key Laboratory for Emerging Organic Contaminants Control State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) School of Environment Tsinghua University Beijing 100084 China School of Environment Jinan University Guangzhou 510632 Guangdong China

To investigate halogenated flame retardant (HFR) contents in recycled plastic materials, 23 recycled plastic samples manufactured in five Chinese provinces were randomly purchased online, and the ∑12HFR concentrations of these samples (including 8 polybrominated diphenyl ethers (PBDEs, BDE 28, 47, 99, 100, 154, 153, 183 and 209), decabromodiphenylethane (DBDPE), 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), and 2 dechlorane plus isomers (DP, syn-DP and anti-DP)) varied from ND to 169,000 ng g⁻¹ (mean ± SD, 46,900 ± 44,700 ng g⁻¹). BDE 209 and DBDPE were the dominant components and their concentration ranges were from ND to 106,000 ng g⁻¹ and ND to 81,900 ng g⁻¹, respectively. Generally, the HFR content and plastic variety closely correlate, and the ∑HFR concentrations in the polyvinyl chloride (PVC, N = 5), polypropylene (PP, N = 9), acrylonitrile butadiene styrene (ABS, N = 5), polystyrene (PS, N = 1) and polyethylene (PE, N = 3) samples were 65,300 ± 42,400, 36,700 ± 56,000, 30,000 ± 25,200, 24,300 and 4330 ± 7500 ng g⁻¹, respectively. The HFR abundance in plastic from Guangdong (76,000 ± 56,400 ng g⁻¹, N = 7) and Hebei (37,500 ± 11,500 ng g⁻¹, N = 4) was much higher than that for other provinces/cities. © 2018

关键词： environmental risk Halogenated flame retardants Plastic Recycling

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Source attribution for mercury deposition with an updated atmospheric mercury emission inventory in the Pearl River Delta Region, China

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Frontiers of environmental Science & Engineering 2019年第1期13卷 39-52页

作者： Jiajun Liu Long Wang Yun Zhu Che-Jen Lin Carey Jang Shuxiao Wang Jia Xing Bin Yu Hui Xu Yuzhou Pan Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and Energy South ChinaUniversity of Technology Guangzhou Higher Education Mega Center Guangzhou 510006 China Department of Civil and Environmental Engineering Lamar University Beaumont TX 77710 USA US EPA Office of Air Quality Planning & Standards Res Triangle Park NC 27711 USA State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment. Tsinghua University Beijing 100084 China Guangzhou Environmental Monitoring Centre Guangzhou 510030 China

We used CMAQ-Hg to simulate mercury pollution and identify main sources in the Pearl River Delta (PR.D) with updated local emission inventory and latest regional and global emissions. The total anthropogenic mercury emissions in the PRD for 2014 were 11,939.6 kg. Power plants and industrial boilers were dominant sectors, responsible for 29.4 and 22.7%. We first compared model predictions and observations and the results showed a good performance. Then five scenarios with power plants (PP), municipal solid waste incineration (MSWI), industrial point sources (IP), natural sources (NAT), and boundary conditions (BCs) zeroed out separately were simulated and compared with the base case. BCs was responsible for over 30% of annual average mercury concentration and total deposition while NAT contributed around 15%. Among the anthropogenic sources, IP (22.9%) was dominant with a contribution over 20.0% and PP (18.9%) and MSWI (11.2%) ranked second and third. Results also showed that power plants were the most important emission sources in the central PRD, where the ultra-low emission for thermal power units need to be strengthened. In the northern and western PRD, cement and metal productions were priorities for mercury control. The fast growth of municipal solid waste incineration were also a key factor in the core areas. In addition, a coordinated regional mercury emission control was important for effectively controlling pollution. In the future, mercury emissions will decrease as control measures are strengthened, more attention should be paid to mercury deposition around the large point sources as high levels of pollution are observed.

关键词： Emission inventory Mercury deposition Pearl River Delta (PRD) Source attribution control strategy

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Correction: Iron-based clusters embedded in nitrogen doped activated carbon catalysts with superior cathodic activity in microbial fuel cells

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Journal of Materials Chemistry A 2020年第21期8卷 11056-11057页

作者： Xiaoyuan Zhang Xingguo Guo Qiuying Wang Rufan Zhang Ting Xu Peng Liang Xia Huang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Department of Chemical Engineering Tsinghua University Beijing 100084 China

Correction for ‘Iron-based clusters embedded in nitrogen doped activated carbon catalysts with superior cathodic activity in microbial fuel cells’ by Xiaoyuan Zhang et al., J. Mater. Chem. A, 2020, DOI: 10.1039/C9TA...

Correction for ‘Iron-based clusters embedded in nitrogen doped activated carbon catalysts with superior cathodic activity in microbial fuel cells’ by Xiaoyuan Zhang et al., J. Mater. Chem. A, 2020, DOI: 10.1039/C9TA10797E.

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Highly active and selective sandwich-like SiO 2 @Cu-Fe@H-SiO 2 catalysts for CO 2 upgrading via reverse water-gas shift: The effect of Fe doping position

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Journal of environmental Chemical Engineering 2025年第4期13卷

作者： Xiaoyu Liang Feng Yan Hanjun Liu Feng Xie Yixuan Lu Linying Huang Xuehua Shen Zuotai Zhang School of Environmental Science and Engineering Shenzhen Key Laboratory of Municipal Solid Waste Recycling Technology and Management Southern University of Science and Technology Shenzhen 518055 China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control Southern University of Science and Technology Shenzhen 518055 China DeCarbon Technology (Shenzhen) Co. Ltd. Shenzhen 518055 China Shenzhen Energy Environment Co. Ltd. Shenzhen 518055 China

The reverse water-gas shift (RWGS) reaction plays an important role for converting the greenhouse gas CO 2 and renewable H 2 into liquid hydrocarbons under moderate conditions. Yet, the development of low-temperature RWGS catalysts remains a significant challenge, considering the CO 2 conversion, CO selectivity, long-term stability. This study presents a novel strategy to encapsulate the Cu-Fe nanoclusters within a hollow silica shell, addressing the key challenges of low-temperature activity and sintering resistance. The synthesized SiO 2 @Cu-Fe@H-SiO 2 catalyst achieved superior RWGS performance, with CO 2 conversion reaching 50.7 % at 500°C (30,000 mL·gcat⁻¹·h⁻¹, H 2 /CO 2 = 4:1) and nearly 100 % CO selectivity maintained over a wide temperature range (300°C–750°C). Stability tests under stringent conditions confirmed the remarkable durability of the catalyst during a continuous 100-h run. Based on the serials of characterization, the innovative sandwich-like SiO 2 @Cu-Fe@H-SiO 2 nanostructure significantly enhanced the metal dispersion and prevented agglomeration under the demanding reaction conditions; meanwhile, the introduction of Fe improved the Cu-Fe interfacial interactions and enhanced the surface basicity, which was critical for activating CO 2 molecule and improving catalytic efficiency. Comparative analysis reveals that this system outperformed many state-of-the-art RWGS catalysts, offering competitive activity and selectivity while being economically viable due to its noble-metal-free composition. This work underscores the potential of encapsulation strategy in designing high-performance, sintering-resistant catalysts for CO 2 utilization, paving the way for scalable and sustainable CO production from CO 2 and renewable hydrogen under mild conditions.

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Ozonation as an efficient pretreatment method to alleviate reverse osmosis membrane fouling caused by complexes of humic acid and calcium ion

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Frontiers of environmental Science & Engineering 2019年第4期13卷 89-100页

作者： Xuehao Zhao Yinhu Wu Xue Zhang Xin Tong Tong Yu Yunhong Wang Nozomu Ikuno Kazuki Ishii Hongying Hu Environmental Simulation and Pollution Control State Key Joint Laboratory State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC)School of EnvironmentTsinghua UniversityBeijing 100084China Collaborative Innovation Center for Advanced Nuclear Energy Technology Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China Kurita Water Industries Ltd. Nakano-kuTokyo 164-0001Japan Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen InstituteShenzhen 518055China

Humic acid has been considered as one of the most significant sources in feed water causing organic fouling of reverse osmosis (RO) membranes, but the relationship between the fouling behavior of humic acid and the change of its molecular structure has not been well developed yet. In this study, the RO membrane fouling behavior of humic acid was studied systematically with ozonation as a pretreatment method to control RO membrane fouling. Furthermore, the effect of ozone on the structure ofhumic acid was also explored to reveal the mechanisms. Humic acid alone (10-90 mg/L, in deionized water) was found not to cause obvious RO membrane fouling in 45-h operation. However, the presence of Ca^2+ aggravated significantly the RO membrane fouling caused by humic acid, with significant flux reduction and denser fouling layer on RO membrane, as it was observed by scanning electron microscope (SEM) and atomic force microscope (AFM). However, after the pretreatment by ozone, the influence of Ca^2+ was almost eliminated. Further analysis revealed that the addition of Ca^2+ increased the particle size of humic acid solution significantly, while ozonation reduced the SUVA254, particle size and molecular weight of the complexes of humic acid and Ca^2+(HA-Ca^2+ complexes). According to these results and literature, the bridge effect of Ca^2+ aggregating humic acid molecules and the cleavage effect of ozone breaking HA-Ca^2+ complexes were summarized. The change of the structure of humic acid under the effect of Ca^2+ and ozone is closely related to the change of its membrane fouling behavior.

关键词： Reverse osmosis Membrane fouling Humic acid Ca^2+ Ozone

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Benthic bioturbations weaken the stability of blue carbon storage

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National Science Open 2025年第2期4卷 205-218页

作者： Yingrong Huang Peng Zhang He-Bo Peng Feng Pan Yan Liu Kai Wang Yu Cai Jianyu Wang Zhenyan Wang Chunmiao Zheng Hailong Li Ding He Junjian Wang Chenyuan Dang Pengbao Wu Ji Chen Damien Maher Kai Xiao School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems Fujian Key Laboratory of Coastal Pollution Prevention and ControlCollege of the Environment&EcologyXiamen UniversityXiamen 361102China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 318055China Center for Turbulence Research Stanford UniversityStanfordCA 94305USA Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200China Department of Ocean Science and Center for Ocean Research in Hong Kong and MacaoThe Hong Kong University of Science and TechnologyHong Kong 999077China Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin School of Environmental Science&EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Geography and Tourism Huizhou UniversityHuizhou 516007China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China Faculty of Science and Engineering Southern Cross UniversityLismoreNew South Wales 2480Australia CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China

Coastal ecosystems are known for their ability to sequester organic carbon(OC),termed“blue carbon”.The molecular composition of dissolved organic matter(DOM)can affect sediment OC content;however,the impact of benthic bioturbation on DOM properties and OC storage stability is not well *** study examined the effects of bio-turbation by fiddler crabs on DOM molecular properties and OC storage stability along the Chinese *** findings indicate that crab bioturbation enhanced the release of labile molecules by 59%on *** increase is controlled by the coupling reactions of iron and manganese minerals,and is influenced by climatic ***,fiddler crab bioturbation diminishes the durability of blue carbon storage,with the most significant effects observed in mangrove forests,followed by bare mudflats,tidal creek banks,and *** results underscore the critical role of benthic bioturbation in global blue carbon budgets.

关键词： blue carbon crab bioturbation Fe and Mn minerals climate change molecular level continental scale

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