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Abiotic aerobic oxidation pathways of stibnite revealed by oxygen and sulfur isotope systematics of sulfate

Journal of environmental Sciences 2025年第1期147卷 83-92页

作者： Ningjie He Shu Li Xiaoqian Li Yaning Tang Jiaxue Yang Jianwei Zhou School of Environment Studies China University of GeosciencesWuhan 430074China Key Laboratory of Mine Ecological Effects and Systematic Restoration Ministry of Natural ResourcesBeijing 100081China State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution Ministry of Ecology and EnvironmentWuhan 430074China Institute of Geological Survey China University of GeosciencesWuhan 430074China

The environmental threat posed by stibnite is an important geoenvironmental issue of current *** better understand stibnite oxidation pathways,aerobic abiotic batch experiments were conducted in aqueous solution with varyingδ^(18)O_(H_(2)O) value at initial neutral pH for different lengths of time(15-300 days).The sulfate oxygen and sulfur isotope compositions as well as concentrations of sulfur and antimony species were *** sulfur isotope fractionation factor(△^(34)S_(SO4-stibnite))values decreased from 0.8‰to-2.1‰during the first 90 days,and increased to 2.6‰at the 180 days,indicating the dominated intermediate sulfur species such as S_(2)O_(3)^(2-),S0,and H_(2)S(g)involved in Sb2S3 oxidation *** incorporation of O into sulfate derived from O_(2)(~100%)indicated that the dissociated O_(2)was only directly adsorbed on the stibnite-S sites in the initial stage(0-90 days).The proportion of O incorporation into sulfate from water(27%-52%)increased in the late stage(90-300 days),which suggested the oxidation mechanism changed to hydroxyl attack on stibnite-S sites promoted by nearby adsorbed O_(2)on stibnite-Sb *** exchange of oxygen between sulfite and water may also contributed to the increase of water derived O into SO42-.The new insight of stibnite oxidation pathway contributes to the understanding of sulfide oxidation mechanism and helps to interpret field data.

关键词： Sulfide oxidation δ^(34)S_(SO4) δ^(18)O_(SO4) Oxygen source of sulfate

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Chemical characterization of volatile organic compounds (VOCs) emitted from multiple cooking cuisines and purification efficiency assessments

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Journal of environmental Sciences 2023年第8期130卷 163-173页

作者： Hanyu Zhang XuejunWang Xianbao Shen Xin Li BoboWu Guohao Li Huahua Bai Xinyue Cao Xuewei Hao Qi Zhou Zhiliang Yao School of Ecology and Environment Beijing Technology and Business UniversityBeijing 100048China State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China Beijing Municipal Research Institute of Environmental Protection Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and ApplicationNational Urban Environmental Pollution Control Engineering Research CenterBeijing 100037China

Cooking process can produce abundant volatile organic compounds(VOCs),which are harmful to environment and human ***,we conducted a comprehensive analysis in which VOCs emissions from multiple cuisines have been sampled based on the simulation and acquisition platform,involving concentration characteristics,ozone formation potential(OFP)and purification efficiency *** emissions varied from 1828.5 to 14,355.1μg/m^(3),with the maximumand minimumvalues fromBarbecue and Family cuisine,*** and alcohol had higher contributions to VOCs from Sichuan and Hunan cuisine(64.1%),Family cuisine(66.3%),Shandong cuisine(69.1%)and Cantonese cuisine(69.8%),with the dominant VOCs species of ethanol,isobutane and *** comparison,alcohols(79.5%)were abundant for Huaiyang cuisine,while alkanes(19.7%),alkenes(35.9%)and haloalkanes(22.9%)accounted for higher proportions from ***,carbon tetrachloride,n-hexylene and 1-butene were the most abundant VOCs species for Barbecue,ranging from 8.8%to 14.6%.The highest OFP occurred in *** sensitive species of OFP for Huaiyang cuisine were alcohols,while other cuisines were *** efficiency assessments shed light on the removal differences of individual and synergistic control *** emissions exhibited a strong dependence on the photocatalytic oxidation,with the removal efficiencies of 29.0%–54.4%.However,the high voltage electrostatic,wet purification and mechanical separation techniques played a mediocre or even counterproductive role in the VOCs reduction,meanwhile collaborative control technologies could not significantly improve the removal *** results identifiedmore effective control technologies,which were conductive to alleviating air pollution from cooking emissions.

关键词： Cooking emissions Volatile organic compounds(VOCs) VOCs categories Ozone formation potential(OFP) Purification efficiency

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Assessing comparable bioconcentration potentials for nanoparticles in aquatic organisms via combined utilization of machine learning and toxicokinetic models

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SmartMat 2023年第3期4卷 70-83页

作者： Shipeng Dong Zihao Wu Mingjie Wang Xiaoyan Sun Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjingChina Nanjing Qixia District Hospital NanjingChina

The toxicokinetic(TK)model‐derived kinetic bioconcentration factor(BCFk)provides a quantitatively comparable index to estimate the bioaccumulation potential of nanoparticles(NPs)that barely reach thermodynamic equilibrium in aquatic organisms,but experimental data are limited for various *** the present study,a machine learning model was applied to offer reliable in silico predictions for the dynamic body burden of diverse NPs to derive corresponding parameters for the TK *** developed eXtreme Gradient Boosting‐derived TK(XGB‐TK)model was applied to predict BCFk results for a broad range of metallic or carbonaceous NPs,with an appreciable prediction R2 of *** BCFk values were predicted based on a random combination of selected variable features,revealing that their bioaccumulation potential showed an overall negative correlation with NP density or organism *** applying importance analysis and partial dependence plots,NP density and organism size were revealed to be the top essential features that impact the bioaccumulation *** conjunctively used XGB‐TK model enabled a prior comparison for diverse NPs and straightforward derivation on the dependency of features,which could also guide the bioaccumulation mechanism exploration and experimental condition formulation.

关键词： aquatic organism BCF bioaccumulation machine learning nanoparticles toxicokinetic models

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Revealing the intrinsic mechanisms for accelerating nitrogen removal efficiency in the Anammox reactor by adding Fe(Ⅱ)at low temperature

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Chinese Chemical Letters 2024年第8期35卷 341-348页

作者： Linjing Li Wenlai Xu Jianyong Ning Yaping Zhong Chuyue Zhang Jiane Zuo Zhicheng Pan State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China National Postdoctoral Research Station Haitian Water GroupChengdu 610213China National Enterprise Technology Center Haitian Water GroupChengdu 610213China Water Safety and Water Pollution Control Engineering Technology Research Center in Sichuan Province Chengdu 610213China Laboratory of Municipal Wastewater Treatment Technology in Sichuan Province Chengdu 610213China Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China

Fe(Ⅱ)is an essential trace element for anaerobic ammonium oxidation bacteria(AAOB)metabolism,and can improve the nitrogen removal efficiency of anaerobic ammonia oxidation(Anammox).Here we oper-ated two identical expanded granular sludge bed(EGSB)reactors at low temperature(15±3℃)for 154 *** 1(R_(1))received additional Fe(Ⅱ)(0.12 mmol/L)during the late startup phase,while reactor 0(R_(0))served as the control and did not receive extra Fe(Ⅱ).Nitrogen removal in R_(1)became stable at 55 d of operation,ten days earlier than R_(0).The nitrogen removal rate(NRR)of R_(1) was 1.64 kg N m^(−3)d^(−1)and its TN removal rate was as high as 89%,while R_(0)only reached 75%.The addition of Fe(Ⅱ)was fur-ther beneficial to aggregation and stability of the granular sludge,and the used sludge of both reactors showed enrichment for AAOB populations compared to the inoculum,for instance,increased abundance of Candidatus-Kuenenia and in particular of Candidatus-Brocadia(from 0.17%to 10.10%in R_(0)and 7.79%in R_(1)).Diverse microbial species and complex microbial network structure in R_(1)compared to R_(0)promoted the coupled denitrogenation by Anammox,dissimilatory nitrate reduction to ammonium(DNRA),nitrate-dependent Fe oxidation(NDFO),and ferric ammonium oxidation(Feammox).In addition,the microbial community in R_(1)was more resistant to short-term low temperature(2-7℃)starvation,illustrating a further positive effect of adding Fe(Ⅱ)during the startup phase of an Anammox reactor.

关键词： Ambient low temperature Anammox Fe(Ⅱ) Extracellular polymeric substances Microbial community Microbial network analysis

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Evaluation of the technoeconomic feasibility of electrochemical hydrogen peroxide production for decentralized water treatment

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Frontiers of environmental Science & Engineering 2021年第1期15卷 31-45页

作者： Yang Li Yixin Zhang Guangshen Xia Juhong Zhan Gang Yu Yujue Wang School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing Key Laboratory for Emerging Organic Contaminants ControlTsinghua UniversityBeijing 100084China

This study evaluated the feasibility of electrochemical hydrogen peroxide(H2O2)production with gas diffusion electrode(GDE)for decentralized water *** black-polytetrafluoroethylene GDEs were prepared and tested in a continuous flow electrochemical cell for H2O2 production from oxygen *** showed that because of the effective oxygen transfer in GDEs,the electrode maintained high apparent current efficiencies(ACEs,>80%)for H_(2)O_(2) production over a wide current density range of 5–400 mA/cm^(2),and H_(2)O_(2) production rates as high as~202 mg/h/cm^(2) could be ***-term stability test showed that the GDE maintained high ACEs(>85%)and low energy consumption(<10 kWh/kg H2O2)for H_(2)O_(2) production for 42 d(~1000 h).However,the ACEs then decreased to~70%in the following 4 days because water flooding of GDE pores considerably impeded oxygen transport at the late stage of the *** on an electrode lifetime of 46 days,the overall cost for H2O2 production was estimated to be~0.88$/kg H_(2)O_(2),including an electricity cost of 0.61$/kg and an electrode capital cost of 0.27$/*** a 9 cm^(2) GDE and 40 mA/cm^(2) current density,~2–4 mg/L of H2O2 could be produced on site for the electro-peroxone treatment of a 1.2 m^(3)/d groundwater flow,which considerably enhanced ibuprofen abatement compared with ozonation alone(~43%–59%vs.7%).These findings suggest that electrochemical H_(2)O_(2) production with GDEs holds great promise for the development of compact treatment technologies for decentralized water treatment at a household and community level.

关键词： Advanced oxidation process Electro-peroxone Gas diffusion electrode Hydrogen peroxide Oxygen reduction

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An innovative method based on Gaussian cloud distribution and sample information richness for eutrophication assessment of Yangtze’s lakes and reservoirs under uncertainty

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environmental Science and pollution Research 2024年第22期31卷 32784-32799页

作者： Zang, Nan Cao, Guozhi Xu, Yanxue Feng, Yu Xu, Zesheng Zhou, Xiafei Liao, Yunjie China National Environmental Monitoring Centre Beijing100012 China Chinese Academy for Environmental Planning Beijing100043 China Sinosoft Company Limited Beijing100089 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

The precise assessment of a water body’s eutrophication status is essential for making informed decisions in water environment management. However, conventional approaches frequently fail to consider the randomness, fuzziness, and inherent hidden information of water quality indicators. These would result in an unreliable assessment. An enhanced method was proposed for the eutrophication assessment under uncertainty in this study. The multi-dimension gaussian cloud distribution was introduced to capture the randomness and fuzziness. The Shannon entropy based on various sample size and trophic levels was proposed to maximize valuable information hidden in the datasets. Twenty-seven significant lakes and reservoirs located in the Yangtze River Basin were selected to demonstrate the proposed method. The sensitivity and consistency were used to evaluate the accuracy of the proposed method. Results indicate that the proposed method has the capability to effectively assess the eutrophication status of lakes and reservoirs under uncertainty and that it has a better sensitivity since it can identify more than 33–50% trophic levels compared to the traditional methods. Further scenario experiments analysis revealed that the sample information richness, i.e., sample size and the number of trophic levels is of great significance to the accuracy/robustness of the method. Moreover, a sample size of 60 can offer the most favorable balance between accuracy/robustness and the monitoring expenses. These findings are crucial to optimizing the eutrophication assessment. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Eutrophication

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Differences in distributions, assembly mechanisms, and putative interactions of AOB and NOB at a large spatial scale

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Frontiers of environmental Science & Engineering 2023年第10期17卷 55-64页

作者： Bing Zhang Chenxiang Sun Huimin Lin Wei Liu Wentao Qin Tan Chen Ting Yang Xianghua Wen College of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China Environmental Simulation and Pollution Control State Key Joint Laboratory School of EnvironmentTsinghua UniversityBeijing 100084China Institute of Plant Protection Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China

Ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) play crucial roles in removing nitrogen from sewage in wastewater treatment plants (WWTPs) to protect water resources. However, the differences in ecological properties and putative interactions of AOB and NOB in WWTPs at a large spatial scale remain unclear. Hence, 132 activated sludge (AS) samples collected from 11 cities across China were studied by utilizing 16S rRNA gene sequencing technology. Results indicated that Nitrosomonas and Nitrosospira accounted for similar ratios of the AOB community and might play nearly equal roles in ammonia oxidation in AS. However, Nitrospira greatly outnumbered other NOB genera, with proportions varying from 94.7% to 99.9% of the NOB community in all WWTPs. Similar compositions and, hence, a low distance–decay turnover rate of NOB (0.035) across China were observed. This scenario might have partly resulted from the high proportions of homogenizing dispersal (~13%). Additionally, drift presented dominant roles in AOB and NOB assembling mechanisms (85.2% and 81.6% for AOB and NOB, respectively). The partial Mantel test illustrated that sludge retention time and temperature were the primary environmental factors affecting AOB and NOB communities. Network results showed that NOB played a leading role in maintaining module structures and node connections in AS. Moreover, most links between NOB and other microorganisms were positive, indicating that NOB were involved in complex symbioses with bacteria in AS.

关键词： Activated sludge Spatial distributions Microbial assembly Co-occurrence patterns Nitrifying bacteria

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Flash recovery of lithium from spent anode graphite by carbothermal shock and water leaching

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Green Chemistry 2025年第22期27卷 6595-6606页

作者： Song, Duanmei Zhang, Beikai Du, Hongbiao Wu, Jing Yu, Jiadong Li, Jinhui State Key Joint Laboratory Environmental Simulation & Pollution Control School of Environment Tsinghua University Beijing100084 China

The global boom in electric vehicles has led to an alarming accumulation of lithium-ion battery waste. Battery recycling technologies have primarily focused on cathode metal recovery, while the contaminated anode graphite has been severely neglected. Conventional graphite recovery methods require multiple acid washes or prolonged high-temperature treatment and consume large amounts of energy and chemicals. Here, we develop an ultra-fast carbon thermal shock and water leaching (CTSW) method, which can transiently realize the complete stripping of anode materials, enable 100% recovery of graphite and copper foil, and recover valuable lithium resources. Specifically, carbon thermal shock (CTS) introducing auxiliary media (CaCO3, Al2O3, etc.) promotes lithium aggregation from the interior to the surface of graphite, converts insoluble LiF to Li2CO3, achieves deep leaching of >99.5% lithium, and immobilizes the hazardous byproduct, HF, to metal fluoride. Compared to conventional hydrometallurgy, LCA analysis shows that our CTSW method has a significantly lower environmental impact, energy, and cost. © 2025 The Royal Society of Chemistry.

关键词： Lithium-ion batteries

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Migration and release potential of nitrogen at the sediment-water interface in lakes in cold and arid regions

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国际泥沙研究（英文版） 2024年第4期39卷 576-585页

作者： Mengze Li Shuhang Wang Wei Li Wenwen Wang Qi Fei Jing Gao MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China National Engineering Laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State Environment Protection Key Laboratory for Lake Pollution Control Chinese Research Academy of Environmental ScienceBeijing 100012China

Lake eutrophication in cold and arid regions is showing a deepening trend in recent years,posing a serious threat to the regional ecological *** occurrence characteristics,bioavailability,sorption-desorption characteristics,and release risk of sediment nitrogen in the Ulanor Wetland,located in the Hulun Lake basin of China,were investigated by combining field investigation,laboratory simu-lation experiments,and multiple technologies,including diffusive gradients in thin films and high-resolution dialysis *** total nitrogen(TN)in the water overlying the sediment bed(i.e.,overlying water)ranged from 1.44 to 2.65 mg/*** inorganic nitrogen was the main form of TN in overlying water,and ammonia nitrogen(NH4+-N)in the pore water at the sediment-water interface was higher than that in the overlying *** sediment TN content ranged from 695.37 to 2,344.77 mg/kg,with acid-dissolved nitrogen as the main component,and can cause the lowest level of ecotoxic effect The maximum and equilibrium adsorption amounts of sediment NH4+-N ranged from 0.269 to 1.017 mg/g and 0.0132-0.0382 mg/g,*** bioavailability and transport capacity of sediment nitrogen were relatively weak,but a release risk was still observed.

关键词： Cold and arid region Ulanor wetland Sediment-water interface Nitrogen migration and transformation Release risk

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"Smoke Detector"of Human Diseases for environmental Aerosol Exposure

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Chinese Journal of Chemistry 2022年第12期40卷 1471-1477,I0002页

作者： Maosheng Yao State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

Air consists of various different pollutants(both biological and non-biological).COVID-19 pandemic further threatens the air *** exposure causes many diseases including asthma,respiratory infections and *** protein bi-omarker for early diagnosis often fails due to its lower level at the very beginning of a *** another front,different technologies were attempted for realtime monitoring of air ***,many aerosol exposures occur silently without any knowledge due to limitation of available analytical *** breath has emerged as a promising non-invasive sample for disease diagnosis,in-cluding cancer and *** recently,it was shown that rats emitted distinc-tive profile of volatile organic compounds(VOCs)within minutes when exposed to different air pollutants including ozone and *** the pandemic times,breath-borne VOC was also used to rapidly screen *** exposure could result in changes in metabolism,thus releasing different pat-terns of VOCs via breath within very short *** monitoring of exhaled biomarker profile could spot the early signs of a disease,thus offering an earlier *** array and machine learning together can lend a great hand toward such an *** mini review is undertaken to share such endeavors and inspire further innovations.

关键词： Bioaerosol environmental aerosol exposure Breath biomarkerl Disease Detection Analytical Sensor

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