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Field measurement of the organic peroxy radicals by the low-pressure reactor plus laser-induced fluorescence spectroscopy

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Chinese Chemical Letters 2020年第10期31卷 2799-2802页

作者： Shule Li Keding Lu Xuefei Ma Xinping Yang Shiyi Chen Yuanhang Zhang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

A low-pressure reactor(LPR) was developed for the measurement of ambient organic peroxy(RO2)radicals with the use of the laser-induced fluorescence(LIF) *** reactor converts all the RO_(x)(=RO2+HO2+RO+OH) radicals into HO2 *** can conduct different measurement modes through altering the reagent gases,achieving the speciated measurement of RO2 and RO2^#(RO2 radicals derived from the long-chain alkane,alkene and aromatic hydrocarbon).An example of field measurement results was given,with a maximum concentration of 1.88 × 10^(8) molecule/cm^(3) for RO2 and 1.18×10^(8) molecule/cm^(3) for RO2^(#).Also,this instrument quantifies the local ozone production rates directly,which can help to deduce the regional ozone control strategy from an experimental *** new device can se rve as a potent tool for both the explo ration of frontier chemistry and the diagnosis of the control strategies.

关键词： Organic peroxy radicals Flow tube reactor LIF RO_(2)measurement Field observation Ozone production rate

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Responses of Microcystis aeruginosa to polystyrene microplastics: Growth dynamics and implications for water treatment

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Journal of Hazardous Materials 2025年 494卷 138650页

作者： Liu, Decai Zhang, Zhiyong Xu, Lei Fu, Ming-Lai Sun, Wenjie Yuan, Baoling Xiamen Key Laboratory of Municipal and Industrial Solid Waste Utilization and Pollution Control College of Civil Engineering Huaqiao University Fujian Xiamen361021 China Key Laboratory of Songliao Aquatic Environment Ministry of Education Jilin Jianzhu University Changchun130118 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Department of Atmospheric and Hydrologic Science St. Cloud State University 720 4th Avenue South St. Cloud MN56301 United States

The understanding of microplastics (MPs) has advanced significantly with their accumulation in aquatic environments, but their potential impact on cyanobacterial blooms remains inadequately understood. Herein, the dynamic fluctuating effects of polystyrene (PS) on Microcystis aeruginosa were investigated throughout its growth cycle, as well as the action of algal organic matter in the disinfection by-products formation. The maximum inhibition of algal cell growth and phycobiliprotein content by PS during the adaptation phase reached 56.3 % and 76.3 %, respectively. With the extension of exposure time, the inhibitory effect gradually transitions into promotive effect. PS exposure increased the content of extracellular organic matter and enhanced the THMs formation during chlorination, with trihalomethanes concentrations of 62.8 and 101.9 μg/L in the control and PS treatment groups, respectively. Moreover, the reactive oxygen species levels in PS-exposed algal cells were only 71.5 % of those in the control group, and total antioxidant capacity levels, superoxide dismutase and catalase activities were also lower. However, the microcystin content exposed PS was increased to 1.2 times that of the control group. The presence of PS in aquatic environments increases the levels of algal organic matter and microcystin, potentially threatening water quality. This study provides new insights into the combined effects of microplastics on freshwater algae and valuable data on potential risk associated with MPs. © 2025 Elsevier B.V.

关键词： Cell growth

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Emerging strategies of anti-scaling cathodes for direct saline water electrolysis

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Separation and Purification Technology 2025年 374卷

作者： Xia, Fan Wu, Shuai Wang, Weilong Luo, Jiayi Zhao, Yuchen Sheng, Hongyi Zhao, Kun Li, Hongli Yu, Hongtao School of Environmental Science and Technology Dalian University of Technology Dalian116024 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China College of Environmental Science and Engineering North China Electric Power University Beijing102206 China Petrochina Lanzhou Petrochemical Company Lanzhou730060 China

Direct saline water electrolysis has potential applications in industrial wastewater treatment, circulating cooling water softening, hydrogen evolution from seawater, lithium extraction from salt lakes, and so on. However, direct electrolysis is getting into trouble with cathodic scaling. This review focuses on recent advancements of anti-scaling methods and their working mechanisms, such as isolating Ca2+ and Mg2+ from cathodes, confining OH− to cathodic Lewis-acid sites or repelling OH− away from cathodes, intensifying homogeneous nucleation of CaCO3 and Mg(OH)2 in solution, making automatic detachment of scale crystals from cathodes feasible. This review provides a comprehensive summary for how to endow cathodes anti-scaling function, which is expected to promote the practical application of direct saline water electrolysis. © 2025

关键词： Brines

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Enhancing the Efficiency of Enterprise Shutdowns for environmental Protection:An Agent-Based Modeling Approach with High Spatial–Temporal Resolution Data

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Engineering 2024年第11期42卷 295-307页

作者： Qi Zhou Shen Qu Miaomiao Liu Jianxun Yang Jia Zhou Yunlei She Zhouyi Liu Jun Bi School of Management and Economics Beijing Institute of TechnologyBeijing 100081China Center for Energy and Environmental Policy Research Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China The Center of Enterprise Green Governance Chinese Academy of Environmental PlanningBeijing 100012China State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation Chinese Academy of Environmental PlanningBeijing 100012China

Top-down environmental policies aim to mitigate environmental risks but inevitably lead to economic losses due to the market entry or exit of *** study developed a universal dynamic agent-based supply chain model to achieve tradeoffs between environmental risk reduction and economic *** model was used to conduct high-resolution daily simulations of the dynamic shifts in enterprise operations and their cascading effects on supply chain *** includes production,con-sumption,and transportation agents,attributing economic features to supply chain components and cap-turing their *** also accounts for adaptive responses to daily external shocks and replicates realistic firm *** coupling high spatial-temporal resolution firm-level data from 18916 chemical enterprises,this study investigates the economic and environmental impacts of an environmen-tal policy resulting in the closure of 1800 chemical enterprises over three *** results revealed a significant economic loss of 25.8 billion USD,ranging from 23.8 billion to 31.8 billion ***,over 80%of this loss was attributed to supply chain *** analyses indicated that imple-menting a staggered shutdown strategy prevented 18.8%of supply chain losses,highlighting the impor-tance of a gradual policy implementation to prevent abrupt supply chain ***,the study highlights the effectiveness of a multi-objective policy design in reducing economic losses(about 29%)and environmental risks(about 40%),substantially enhancing the efficiency of the environmental *** high-resolution simulations provide valuable insights for policy designers to formulate strategies with staggered implementation and multiple objectives to mitigate supply chain losses and environmental risks and ensure a sustainable future.

关键词： Agent-based model Supply chain network Economic sustainability environmental policy

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Cross-stacked super-aligned carbon nanotube/activated carbon composite electrodes for efficient water purification via capacitive deionization enhanced ultrafiltration

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Frontiers of environmental Science & Engineering 2020年第6期14卷 181-190页

作者： Min Li Shuai Liang Yang Wu Meiyue Yang Xia Huang Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Department of Mechanical Engineering and Tsinghua Foxconn Nanotechnology Research Center Tsinghua UniversityBeijing 100084China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The practical application of the capacitive deionization(CDI)enhanced ultrafiltration(CUF)technology is hampered due to low performance of *** current study demonstrated a novel super-aligned carbon nanotube(SACNT)/activated carbon(AC)composite electrode,which was prepared through coating AC on a cross-stacked SACNT *** desalination capability and water purification performance of the prepared electrode were systematically investigated at different applied voltages(0.8-1.2 V)with a CDI system and a CUF system,*** the CDI tests,as compared with 5ie control AC electrode,the SACNT/AC electrode achieved an approximately 100%increase in both maximum salt adsorption capacity and average salt adsorption rate under all the applied voltage conditions,demonstrating a superior desalination ***,a conspicuous increase by an average of-26%in charge efficiency was also achieved at all the *** the CUF tests,as compared with the control run at 0 V,the treatment runs at 0.8,1.0,and 1.2 V achieved a 2.40-fold,2.08-fold,and 2.43-fold reduction in membrane fouling(calculated according to the final transmembrane pressure(TMP)data at the end of every purification stage),*** average TMP increasing rates at 0.8,1.0,and 1.2 V were also roughly two times smaller than that at 0 V,indicating a dramatical reduction of membrane *** SACNT/AC electrode also maintained its superior desalination capability in the CUF process,resulting in an overall improved water purification efficiency.

关键词： Carbon nanotube Super aligned Conductive membrane Capacitive deionization Ultrafiltration Desalination

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Development of an Optimization-Driven Equilibrium Model for Managing Water Consumption and Their Socio-Economic Effects

SSRN

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SSRN 2024年

作者： Li, Xiaoyang Huang, Guohe Wang, Shuguang Li, Yongping Zhang, Xiaoyue School of Environmental Science and Engineering Shandong University Qingdao266237 China Institute for Energy Environment and Sustainable Communities University of Regina ReginaSKS4S0A2 Canada Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China State Key Joint Laboratory of Environmental Simulation and Pollution Control China

In this study, an optimization-driven general water-management equilibrium model (OWCGE) is developed to facilitate collaborative governance of economy and water resources. The OWCGE will first regulate the strategic direction of water allocation through the development of a non-deterministic fractional optimization model, and then explore the responses of various sectors to different water policies through the computable general equilibrium (CGE) model. The main contribution of OWCGE is simultaneously addressing water allocation under the trade-offs between environmental protection and socio-economic development and tackling the impact of disturbances from one part of the economy on another. A case study of a highly urbanized province (i.e., Guangdong) in China is provided as an example for demonstrating the proposed approach. According to the results, the agricultural sector group should receive 46.9% of total water supply, followed by the industrial sector group with 20.3%. The results of scenario analysis indicate that when the water demand of the tertiary sector group increases by 10%, the total GDP would fall at the fastest rate. The increase in domestic water demand (20%) would result in economy losses in most sectors, and the degrees of such reductions are less than -1.1%. © 2024, The Authors. All rights reserved.

关键词： Economic and social effects

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Transformation Opportunities and Environ-Economic Benefits Analyses of Coke Oven Gas Utilization

SSRN

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SSRN 2023年

作者： Di, Zichen Lei, Feixia Wu, Haibin Lu, Xi Cheng, Fangqin Institute of Resources and Environmental Engineering Shanxi University Taiyuan030006 China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing100084 China Institute for Carbon Neutrality Tsinghua University Beijing100084 China

Coke oven gas (COG) is a primary source of air pollution and carbon emissions during the coking process, and several well-established techniques have been devised to recover and utilize it. However, the degree of their comparative advantages and comprehensive competitiveness across varying scenarios remains to be thoroughly examined. In this study, we integrate life cycle assessment-economic analysis-scenario analysis model to evaluate the environmental sustainability benefits and socio-economic costs of multiple COG utilization routes (COGtM: COG-to-Methanol, COGtLNG: COG-to-Liquefied Natural Gas, COGtSA: COG-to-Synthetic Ammonia, and COGtH: COG-to-Hydrogen) in China. The results indicated that additional COG utilization routes have an adverse impact on acidification potential (AP) and eutrophication potential (EP), whereas global warming potential (GWP) are the primary beneficiaries. Among the four routes considered, COGtH and COGtM are the preferred choices for the environmental priority and economic priority scenarios, respectively. In line with the "regulating coking capacity on the basis of steel capacity" policy, coking capacity is projected to slightly increase in the mid-term but decline significantly in the long term. Among the potential future markets, COG-to-methanol conversion is likely to maintain a significant market share for the corresponding product. COGtH for producing hydrogen appears to be a short-term option among the potentially expanding hydrogen market. Conversely, COGtSA could satisfy 7-14% of the market demand and is deemed a reliable pathway in terms of a balance between economics, environment, and future market coverage. However, COGtLNG faces challenges, both financially and environmentally, and may be only worth developing from a strategic energy security perspective. © 2023, The Authors. All rights reserved.

关键词： Life cycle

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O2 plasma-modified carbon nanotube for sulfamethoxazole degradation via peroxymonosulfate activation: Synergism of radical and non-radical pathways boosting water decontamination and detoxification

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Chemosphere 2023年 344卷

作者： Liu, Shiqi Zhang, Zichen Lu, Rui Mao, Yuankun Ge, Huiru Liu, Can Tian, Chenxi Yin, Siyuan Feng, Li Liu, Yongze Chen, Chao Zhang, Liqiu Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Technical Center of Solid Waste and Chemicals Management Ministry of Ecology and Environment Beijin100029 China

Sulfamethoxazole (SMX), a widely used antibiotic, has triggered increasing attention due to its extensive detection in wastewater effluent, causing serious ecological threats. Herein, a carbon-based heterogeneous catalyst was developed by the O2 plasma-etching process, regulating oxygen-containing functional groups (OFGs) and defects of carbon nanotubes (O-CNT) to activate peroxymonosulfate (PMS) for highly efficient SMX abatement. Through adjusting the etching time, the desired active sites (i.e., C=O and defects) could be rationally created. Experiments collectively suggested that the degradation of SMX was owing to the contribution of synergism by radical (•OH (17.3%) and SO4•– (39.3%)) and non-radical pathways (1O2, 43.4%), which originated from PMS catalyzed by C=O and defects. In addition, the possible degradation products and transformation pathways of SMX in the system were inferred by combining the Fukui function calculations and the LC-MS/MS analysis. And the possible degradation pathway was effective in reducing the environmental toxicity of SMX, as evidenced by the T.E.S.T. software and the micronucleus experiment on Vicia faba root tip. Also, the catalytic system exhibited excellent performance for different antibiotics removal, such as amoxicillin (AMX), carbamazepine (CBZ) and isopropylphenazone (PRP). This study is expected to provide an alternative strategy for antibiotics removal in water decontamination and detoxification. © 2023 Elsevier Ltd

关键词： Carbon nanotubes

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Phosphorus transformation under the influence of aluminum,organic carbon,and dissolved oxygen at the water-sediment interface:A simulative study

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Frontiers of environmental Science & Engineering 2020年第3期14卷 165-176页

作者： Ouchen Cai Yuanxiao Xiong Haijun Yang Jinyong Liu Hui Wang State Key Joint Laboratory on Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084 Beijing 101 Middle School Beijing 100091China Department of Chemistry Tsinghua UniversityBeijing 100084China

The effects of sediment aluminum(Al),organic carbon(OC),and dissolved oxygen(DO)on phosphorus(P)transformation,at the water-sediment interface of a eutrophic constructed lake,were investigated via a series of simulative *** above three factors had various influences on dissolved P concentration,water pH,water and surface sediment appearance,and P *** of Al had the greatest effect on suppressing P release,and the water p H remained alkaline in the water-sediment system under various OC and DO *** dissolution of the added Al was detected.31P-N M R characterization suggested that OC addition did not promote biological P uptake to polyphosphates under oxic *** simulation result on the added phytate indicated the absence of phytate in the original lake *** compared to the reported natural lakes and wetland,the water-sediment system of the constructed lake responded differently to some simulative *** Al,OC,and DO can be controlled with engineering methods,the results of this study provide insights for the practical site restorations.

关键词： Phosphorus Sediment simulation Dissolved oxygen Organic carbon Aluminum

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Tracing the Consumption-Based Co2 Emissions of Megacities in Multiscale Economies

SSRN

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SSRN 2023年

作者： Meng, Fanxin Sun, Yutong Wang, Dongfang Liu, Gengyuan Wang, Yafei Liu, Lancui State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China School of Statistics Beijing Normal University Beijing100875 China Business School Beijing Normal University Beijing100875 China

Megacities are showing heterogeneity of CO2 emission patterns under complex global trade networks. Given that megacities are closely interconnected with multiscale economies, the precise CO2 emission reduction policies require cross-boundary consumption-based CO2 emission inventories that take global supply chains into account. However, due to data availability and other issues, the CO2 flow patterns in megacities has yet to be explored deeply. Therefore, we constructed a megacity-centred CO2 emission accounting model based on the multiscale multiregional input‒output (MSIO) table and selected 10 megacities in Chinese representative city clusters to test this model. This model traced multiscale sources of megacities’ CO2 emissions driven by final demand, elucidating national and global connections with megacities. The results show that megacities exhibit diverse CO2 emission patterns, categorized into four consumption degree types (ranging from 0.96 of Chongqing to 4.10 of Chengdu), which also relate to production efficiency and consumption efficiency. Shenzhen’s consumption mainly induces emissions in other world regions while other megacities leads to CO2 emissions in mainland China regions, notably in Hebei, Shandong, Jiangsu and Inner Mongolia provinces. Construction, services and other manufacturing are the top three emission sectors. Services consumed highly from localities, while the remaining two sectors were more dependent on imports. For example, CO2 emissions of other manufacturing in Shanghai and Shenzhen were primarily imported from East Asia, while Beijing imported higher from North America. Comparing these megacities’ consumption-based CO2 emission profiles elucidates the urgent need for global carbon governance along supply chains and differentiated carbon reduction policies based on urban classification. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

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