检索结果-内蒙古大学图书馆

Multivariate optimization of characteristic parameters of continuous-flow system with a front buffer tank for industrial reverse osmosis concentrate treatment

引用

Chemosphere 2023年第1期336卷 139078页

作者： Li, Shida Zeng, Fantang Zheng, Shaokui Fan, Zhongya Huang, Lu The Key Laboratory of Water and Air Pollution Control of Guangdong Province South China Institute of Environmental Sciences Ministry of Ecology and Environment No. 18 Ruihe Road Guangzhou510530 China School of Environment MOE Key Laboratory of Water and Sediment Sciences/State Key Lab of Water Environment Simulation Beijing Normal University Beijing100875 China

Industrial reverse osmosis concentrate (ROC) was electrochemically oxidized using a continuous-flow system (CFS) with a front buffer tank. Multivariate optimization including Plackett-Burman (PBD) and central composite design based on response surface method (CCD-RSM) was implemented to investigate the effects of characteristic (e.g., recirculation ratio (R value), ratio of buffer tank and electrolytic zone (RV value)) and routine (e.g., current density (i), inflow linear velocity (v) and electrode spacing (d)) parameters. R, v values and current density significantly influenced chemical oxygen demand (COD) and NH4+−N removal and effluent active chlorine species (ACS) level, while electrode spacing and RV value had negligible effects. High chloride content of industrial ROC facilitated the generation of ACS and subsequent mass transfer, low hydraulic retention time (HRT) of electrolytic cell improved the mass transfer efficiency, and high HRT of buffer tank prolonged the reaction between the pollutants and oxidants. The significance levels of COD removal, energy efficiency, effluent ACS level and toxic byproduct level CCD-RSM models were validated by statistical test results, including higher F value than critical effect value, lower P value than 0.05, low deviation between predicted and observed values, and normal distribution of calculated residuals. The highest pollutant removal was achieved at a high R value, a high current density and a low v value;the highest energy efficiency was achieved at a high R, a low current density and a high v value;the lowest effluent ACS and toxic byproduct levels were achieved at a low R value, a low current density and a high v value. Following the multivariate optimization, the optimum parameters were decided to be v = 1.2 cm h−1, i ≥ 8 mA cm−2, d ≥ 4, RV = 10−20 and R = 1 to achieve better effluent quality (i.e., lower effluent pollutant, ACS and toxic byproduct levels). © 2023 Elsevier Ltd

关键词： Effluents

来源：评论

学校读者我要写书评

暂无评论

Characteristics, Sources, and Health Risks of Volatile Organic Compounds in Different Functional Regions of Shenyang

SSRN

引用

SSRN 2024年

作者： Zhao, Di Wang, Qi Hui, Yu Liu, Yan Wang, Fan Chu, Biwu State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China Liaoning Provincial Key Laboratory of Atmospheric Environmental Pollution Prevention and Control Shenyang Academy of Environmental Sciences Shenyang110167 China Department of Transfusion The First Hospital of China Medical University Shenyang110122 China University of Chinese Academy of Sciences Beijing100049 China

The concentration of 56 volatile organic compounds (VOCs) in the ambient air of Shenyang was continuously monitored at four sites in 2021. The characteristics, sources, secondary pollution potential and health risks of VOCs in different functional regions of Shenyang were discussed. The results indicate that the concentration of VOCs in industrial regions was significantly higher than that in non-industrial regions, with a mean of 41.09 ± 69.82 parts per billion volumes (ppbv) compared to 19.99 ± 17.86 ppbv (commercial and residential region in urban fringe), 27.51 ± 28.81 ppbv (educational and scenic region) and 29.71 ± 23.97 ppbv (commercial and residential region in urban center). The positive matrix factorization (PMF) model was utilized to assign ethe origin of VOCs in Shenyang, and six factors were recognized: gasoline vehicle (34.8%), diesel vehicle (28.3%), combustion (11.4%), vegetation (9.7%), industrial processes (8.2%), and fuel evaporation (7.7%). The results of the reactivity evaluation indicated that the ozone (O3) formation potential (OFP) was primarily influenced by industrial processes (29.2%), diesel vehicle (25.7%), vegetation (17.0%). These three factors were also the top three contributors to secondary organic aerosol formation potential (SOAP), accounting for 44.2%, 9.4% and 30.3%, respectively. At the all four sites, the non-carcinogenic and carcinogenic risks of VOCs ranged from 1.6 × 10-2 to 3.8 × 10-2 and from 2.3 × 10-6 to 3.3 × 10-6, respectively. And the main risks can be attributed to emissions from industrial processes and gasoline vehicles. These findings suggested to strengthen the control of vehicles emissions throughout all regions in Shenyang and industrial processes emissions in industrial regions. © 2024, The Authors. All rights reserved.

关键词： Volatile organic compounds

来源：评论

学校读者我要写书评

暂无评论

An overview for monitoring and prediction of pathogenic microorganisms in the atmosphere

引用

Fundamental Research 2024年第3期4卷 430-441页

作者： Jianping Huang Danfeng Wang Yongguan Zhu Zifeng Yang Maosheng Yao Xiaoming Shi Taicheng An Qiang Zhang Cunrui Huang Xinhui Bi Jiang Li Zifa Wang Yongqin Liu Guibing Zhu Siyu Chen Jian Hang Xinghua Qiu Weiwei Deng Huaiyu Tian Tengfei Zhang Tianmu Chen Sijin Liu Xinbo Lian Bin Chen Beidou Zhang Yingjie Zhao Rui Wang Han Li Collaborative Innovation Center for Western Ecological Safety College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory HealthFirst Affiliated Hospital of Guangzhou Medical UniversityState Key Laboratory of Respiratory Disease(Guangzhou Medical University)Guangzhou 510230China College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Vanke School of Public Health Tsinghua UniversityBeijing 100084China State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Center for Pan-third Pole Environment Lanzhou UniversityLanzhou 730000China College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 510640

Corona virus disease 2019(COVID-19)has exerted a profound adverse impact on human *** have demonstrated that aerosol transmission is one of the major transmission routes of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).Pathogenic microorganisms such as SARS-CoV-2 can survive in the air and cause widespread infection among *** monitoring of pathogenic microorganism transmission in the atmosphere and accurate epidemic prediction are the frontier guarantee for preventing large-scale epidemic *** of pathogenic microorganisms in the air,especially in densely populated areas,may raise the possibility to detect viruses before people are widely infected and contain the epidemic at an earlier *** multi-scale coupled accurate epidemic prediction system can provide support for governments to analyze the epidemic situation,allocate health resources,and formulate epidemic response *** review first elaborates on the effects of the atmospheric environment on pathogenic microorganism transmission,which lays a theoretical foundation for the monitoring and prediction of epidemic ***,the monitoring technique development and the necessity of monitoring pathogenic microorganisms in the atmosphere are summarized and ***,this review introduces the major epidemic prediction methods and highlights the significance to realize a multi-scale coupled epidemic prediction system by strengthening the multidisciplinary cooperation of epidemiology,atmospheric sciences,environmental sciences,sociology,demography,*** summarizing the achievements and challenges in monitoring and prediction of pathogenic microorganism transmission in the atmosphere,this review proposes suggestions for epidemic response,namely,the establishment of an integrated monitoring and prediction platform for pathogenic microorganism transmission in the atmosphere.

关键词： Aerosol transmission Epidemic monitoring methods Epidemic prediction modelsEpidemic response Multidisciplinary cooperation

来源：评论

学校读者我要写书评

暂无评论

Multifaceted Effects of Ultrasonic Enhanced Fe-C/Pds System for Sludge Dewatering and Resource Utilization: Synergy of Oxidation and Cracking Processes

SSRN

引用

SSRN 2024年

作者： Li, Wenye Xie, Binghan Li, Qinghao Li, Zhipeng Zhu, Jing You, Hong Zhang, Guoyu Li, Weirun Xing, Xiaodi Zeng, Fanbo Li, Lingjie Zhao, Shuyu Shang, Zhiwei Wang, Shuxiao Harbin Institute of Technology Weihai Sch Marine Sci & Technol Weihai264209 China Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin150090 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

The effective dewatering of waste activated sludge (WAS) and the utilization of resources are crucial for the sustainable development of wastewater treatment plants. In this study, ultrasonic (US) collaborative Fe-C activated peroxydisulfate (PDS) coupling system was constructed to investigate the shift in physicochemical properties and explore the mechanisms during the cracking and oxidation of WAS. The US enhanced Fe-C/PDS system exhibited excellent oxidation capacity with the water content (Wc) of sludge cake and the specific resistance to filtration (SRF) reducing to 61.71% and 1.12×1012 m/kg under the conditions of PDS, Fe-C, and US power levels at 120 mg/g TS, 300mg/g TS, and 150W. Furthermore, the high cracking capacity led to a rise in soluble chemical oxygen demand to 630.64 mg/L and a 9.16% reduction in volatile solids. Compared to Fe-C/PDS, the addition of US enhanced the leaching of Fe, promoted to the formation of reactive oxidative species. The contribution of ·O2-and 1O2 to sludge conditioning was 37% and 43.17%, indicating the oxidation process of free radicals and non-free radicals in Fe-C/PDS/US system. Additionally, US improved the cracking capacity of the system, releasing bound extracellular polymeric substances (EPS) and degrading into soluble properties. The concentration of short-chain fatty acids (SCFAs) in the sludge was increased by 96.7%, which significantly improved the quality of carbon source suitable for recycling. The positive improvement of sludge physicochemical properties revealed the decryption-degradation synergistic effect of the coupled systems. These findings provide a novel strategy for effective disposal and reduction in WAS while also offering valuable insights into resource utilization. © 2024, The Authors. All rights reserved.

关键词： Dewatering

来源：评论

学校读者我要写书评

暂无评论

Growth of BaTaO2N-BaNa0.25Ta0.75O3 Solid Solution Photocatalyst for Visible Light-Driven Z-Scheme Overall Water Splitting

引用

能源材料前沿（英文） 2023年第3期2023卷 185-192页

作者： Ying Luo Qiaoqi Guo Jun Xu Hanghang Zhou Zheng Wang Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

BaTaO2N with intense visible light absorption has been demonstrated as a promising photocatalyst for Z-scheme overall water splitting,whereas the photocatalytic activity of BaTaO2N is still restricted by strong charge recombination at structural ***,we present the direct growth of BaTaO2N-BaNa0.25Ta0.75O3 solid solution from a lattice-matched BaNa0.25Ta0.75O3 precursor through volatilization of Na species during a nitridation *** method promotes the direct phase transformation from BaNa0.25Ta0.75O3 to BaTaO2N to inhibit the formation of defect *** a result,the as-obtained BaTaO2N-BaNa0.25Ta0.75O3 solid solution shows greatly enhanced activity compared to the conventional BaTaO2N,regardless of photocatalytic H2 evolution in the presence of methanol or Z-scheme overall water *** study provides a facile method to construct(oxy)nitride-based solid solution photocatalysts with low defect density for efficient solar hydrogen production from water splitting.

关键词： z-scheme solution growth solid water bana batao light-driven overall photocatalyst

来源：评论

学校读者我要写书评

暂无评论

A Low-Cost Microbial Fuel Cell Based Sensor for In-Situ Monitoring of Dissolved Oxygen for Over Half a Year

SSRN

引用

SSRN 2022年

作者： Sun, Dan Xie, Bin Li, Jiahao Huang, Xuzhan Chen, Jiawang Zhang, Fang Institute of Ocean Engineering and Technology Ocean College Zhejiang University Zhoushan316021 China State Key Joint Laboratory of Environment Simulation and Pollution Control State Environment Protection Key Laboratory of Microorganism Application and Risk Control School of Environment Tsinghua University Beijing100084 China

Various dissolved oxygen (DO) sensors have been successfully developed for short-term or laboratory monitoring. However, only few of them can be used for long-term and in-situ DO measurement, and most of them had problems including high cost and weekly calibration. Here, a chitin-carrying microbial fuel cell (MFC) based sensor was developed using sediment anolyte for long-term DO monitoring without maintenance, with an extremely low cost of 12.17$ and a performance comparable to certain commercial sensors. The long lifetime of over half a year was attributed to the syntrophic interactions between fermentative and exoelectrogenic microbes that were well developed for chitin degradation in anaerobic condition by using sediment filling in the anode chamber. With sediment anolyte, glass fiber was used as the separator to replace the ion exchange membrane, resulting in a much lower cost which was only 0.2% of the HACH sensor (SBE 63) or 0.5% of the YIS sensor (EXO3) for in-situ DO monitoring. Field tests of this MFC based DO sensor were conducted in fresh and saline waters respectively. Excellent performances were achieved with average deviations of © 2022, The Authors. All rights reserved.

关键词： Dissolved oxygen

来源：评论

学校读者我要写书评

暂无评论

Vertical Profiles of Volatile Organic Compounds in Suburban Shanghai

引用

Advances in Atmospheric Sciences 2021年第7期38卷 1177-1187页

作者： Yuhan LIU Hongli WANG Shengao JING Ming ZHOU Shenrong LOU Kun QU Wanyi QIU Qian WANG Shule LI Yaqin GAO Yusi LIU Xiaobing LI Zhong-Ren PENG Junhui CHEN Keding LU State Key Joint Laboratory of Environment Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China State Key Laboratory of Severe Weather&Key Laboratory for Atmospheric Chemistry of China Meteorology Administration Chinese Academy of Meteorological SciencesBeijing 100081China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Institute for Environmental and Climate ResearchJinan UniversityGuangzhou 510632China International Center for Adaptation Planning and Design College of DesignConstruction and PlanningUniversity of FloridaGainesville 32611FLUSA Sichuan Academy of Environmental Science Sichuan 610041China

As Volatile Organic Compounds(VOCs)are one of the precursors of ozone,their distribution and variable concentrations are highly related to local ozone pollution *** this study,we obtained vertical profiles of VOCs in Shanghai’s Jinshan district on 8 September and 9 September in 2016 to investigate their distribution and impact on local atmospheric oxidation in the near surface *** samples were collected from heights between 50 m and 400 m by summa canisters using an unmanned aerial vehicle(UAV).Concentrations of VOCs(VOCs refers to the 52 species measured in this study)varied minimally below 200 m,and decreased by 21.2%from 100 m to 400 *** concentrations of VOCs above 200 m decreased significantly in comparison to those below 200 *** proportions of alkanes and aromatics increased from 55.2%and 30.5%to 57.3%and 33.0%,***,the proportion of alkenes decreased from 13.2%to 8.4%.Toluene and m/p-xylene were the key species in the formation of SOA and *** component analysis(PCA)revealed that the VOCs measured in this study mainly originated from industrial emissions.

关键词： VOCs vertical profiles secondary organic aerosol PCA Ozone

来源：评论

学校读者我要写书评

暂无评论

Synergistic effects of tree-herb intercropping on the phytoremediation efficiency of cadmium and lead contaminated soil

引用

Science of the Total environment 2024年 954卷 176709页

作者： Zhang, Chentao Zha, Yidi Guang, Penghong Ai, Fuxun Yin, Ying Guo, Hongyan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Joint International Research Centre for Critical Zone Science-University of Leeds and Nanjing University Nanjing University Nanjing210023 China

Tree-herb intercropping has emerged as an effective strategy for the remediation of soil contamination. In this study, the effects of intercropping willow with herbaceous plants Lolium perenne L., Iris lactea Pall. and Bidens pilosa L. were investigated on the phytoremediation of Cd- and Pb-contaminated soil. After a 90-day of cultivation, the results showed that intercropping stimulated the phytoremediation efficiency through increased metal accumulation in plants. Intercropping caused a significant (p © 2024 Elsevier B.V.

关键词： Soil pollution

来源：评论

学校读者我要写书评

暂无评论

Cadmium distribution and availability in different particle-size aggregates of post-harvest paddy soil amended with bio-based materials

引用

Science of the Total environment 2024年 957卷 177739页

作者： Luo, Huilong Chen, Juan Yang, Bin Li, Yake Wang, Panpan Yu, Jingjing Yuan, Bei Zhang, Yunhui Ren, Jie Du, Ping Li, Fasheng State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Institute of Resources and Environment Beijing Academy of Science and Technology Beijing100089 China Technical Center for Soil Agriculture and Rural Ecology and Environment Ministry of Ecology and Environment Beijing100012 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle School of Ecology and Environment Inner Mongolia University Hohhot010021 China

Research on the use of organic materials as soil amendments for the remediation of Cd-contaminated agricultural land exists. However, the mechanisms based on which organic materials affect the distribution and availability of Cd in soil aggregates remain unclear. Here, Cd-contaminated paddy soil and different bio-based materials were used for rice pot experiments. Rhizosphere soils were separated into six particle sizes. Cd fractions were analyzed with BCR sequential extraction and specific functional groups associated with Cd were characterized using XPS. We found that bio-based materials promoted the formation of large aggregates to different extents. Cd tended to be enriched in fine- and coarse-grained soil particles, which is mainly related to the soil organic matter. Bio-based materials reduced the relative content of the weak-acid extractable fraction and increased the relative content of the reducible fraction, resulting in soil Cd immobilization. Soil dissolved organic matter (DOM) was the key factor affecting the distribution and availability of Cd in soil aggregates and different organic matter and Cd-binding functional groups in aggregates altered the Cd availability in soil. The results provide insight and guidance for understanding the cadmium immobilization mechanism and screening appropriate materials in the remediation of agricultural land. © 2024 Elsevier B.V.

关键词： Bio-based amendment Cd availability Cd immobilization mechanism Geochemical speciation Particle-size fractions Soil aggregate

来源：评论

学校读者我要写书评

暂无评论

Biobr/Mxene/Gc3n4 Z-Scheme Heterostructured Photocatalysts Mediated by Oxygen Vacancies and Mxene Quantum Dots for Tetracycline Degradation: Process, Mechanism and Toxicity Analysis

SSRN

引用

SSRN 2022年

作者： Gao, Kexuan Hou, Li-An An, Xiaoqiang Yang, Yu State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China Xi’an High-Tech Institute Xi’an710025 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

The rapid recombination of photogenerated charges and the wide band gap make the rational design of high-performance stable photocatalysts challenging. Herein, the features of heterojunctions, oxygen vacancies (OVs), and MXene quantum dots (MQDs) were simultaneously collected in CBM using a simple solvothermal method for the first time, and their synergistic effects play a substantial positive role in the catalytic degradation. Under visible light irradiation, 99% of the 20 ppm tetracycline hydrochloride (TC-HCl) was degraded by CBM within 30 min, which degradation efficiency was 12 times of gC3N4 . Thirteen intermediates and possible photocatalytic degradation pathways were proposed. It was discovered that the photocatalyst is non-toxic to the environment but can swiftly demonstrate an excellent antibacterial effect when exposed to visible light. This research provides fresh insights into the effective removal of organic pollutants from water by combining cutting-edge defect engineering and quantum dot doping technology in photocatalytic heterojunction. © 2022, The Authors. All rights reserved.

关键词： Semiconductor quantum dots

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：