检索结果-内蒙古大学图书馆

Effects of PBAT/PLA biodegradable film mulching on greenhouse gas emissions in rain-fed maize farmland of Northeast China

引用

Science of the Total environment 2024年 957卷 177725页

作者： Zhang, Wangwang Gu, Jian Zhang, Yuanzheng Chen, Zhijun Zhu, Zhenchuang Liu, Yongqi Sun, Shijun College of Water Conservancy Shenyang Agricultural University Shenyang110866 China Institute of Applied Ecology Chinese Academy of Sciences Shenyang110016 China State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment of China Nanjing210042 China Center for Agricultural Water Research China Agricultural University Beijing100083 China

Plastic film mulching can effectively increase soil temperature, retain moisture, and enhance crop yield and quality. However, long-term application might pose risks of increased greenhouse gas (GHG) emissions and residual film pollution. Biodegradable film provides a crucial solution to alleviate farmland plastic pollution, but it remains unclear whether biodegradable film can simultaneously enhance crop yields and reduce GHG emissions. Thus, a two-year field experiment was conducted in rain-fed maize farmland of Northeast China. This field experiment included four treatments: BM1 (0.006 mm-thick biodegradable film), BM2 (0.010 mm-thick biodegradable film), PM (0.010 mm-thick traditional plastic film), and CK (non-mulching control). Results indicated that film mulching increased cumulative CO2 emissions by improving soil temperature and moisture. BM1 and BM2 achieved lower cumulative CO2 emissions than PM. N2O emissions were mainly concentrated in the emergence and jointing stages, whose peaks and cumulative values were reduced by film mulching. BM1 and BM2, however, had higher cumulative N2O emissions than PM. All treatments were CH4 sinks, and mulching treatments showed low soil CH4 absorption compared to CK. Additionally, mulching treatments increased maize yield, GWP and GHGI by 4.19 % to 15.89 %, 8.52 % to 52.20 % and − 0.06 % to 45.93 %, respectively, compared to CK. PM showed the highest GWP and GHGI. All mulching treatments improved the net ecosystem economic budget, with increases of 3.03–3.08 thousand CNY ha−1 and 0.35–1.39 thousand CNY ha−1 in 2022 and 2023, respectively, compared to CK. Biodegradable film treatments had higher net ecosystem economic budgets than traditional plastic film treatment. Overall, the biodegradable film can be used to replace traditional plastic film to enhance maize yield while minimizing residual film pollution and GHG emissions in the experimental region. © 2024 Elsevier B.V.

关键词： Greenhouse gas emissions

来源：评论

学校读者我要写书评

暂无评论

Correct the Correlation quality of Pxrf to Better Map Heavy Metal Contamination by Spatial Co-Simulationcorrect the Correlation quality of Pxrf to Better Map Heavy Metal Contamination by Spatial Co-Simulation

SSRN

引用

SSRN 2023年

作者： Zhao, Manying Chen, Zengsiche Li, Shu Zhao, Yuxin Qifei, Huang Xu, Ya Yuqiang, Liu State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China State Environmental Protection Key Laboratory of Hazardous Waste Identification and Risk Control Beijing100012 China Solid Waste and Chemicals Management Center Ministry of Ecology and Environment Beijing100029 China School of Municipal and Environmental Engineering Jilin Jianzhu University Changchun130000 China

Soil pollution, especially heavy metal pollution, is a global environmental problem. High-precision mapping based on PXRF data has been widely studied in recent years to facilitate reasonable soil management measures. Due to the poor correlation with the soil metal concentration, the original PXRF data directly used for co-simulation can not accurately map the contaminated sites with highly heterogeneous concentrations. Therefore, this study selects a former landfill-contaminated site for research, explores the best correlation mode between PXRF variants and actual heavy metal concentration, analyzes the impact of correlation quality correction on the co-simulation of the spatial distribution of heavy metals, and explores the most appropriate collaborative interpolation mode and point density. The results show that：(1) After the nonlinear change, the correlation model between PXRF and actual concentration has been significantly improved, and the correlation coefficient of five heavy metals has been increased from 0.214-0.232 to 0.936-0.986. (2) The PXRF data after correlation correction significantly improved the accuracy of co-simulation, and the average errors of heavy metals Zn, Pb, and Cu decreased by 78.2%, 45.5%, and 65.3% respectively, leading to obvious improvement of the "bull eye effect" caused by local abnormal high-value points. (3) When the point density of the main variable is lower than 4 holes/hm2, the co-simulation accuracy will be significantly reduced, indicating that the point density of the main variable should not be lower than a certain threshold during the co-simulation. (4) When the point density of the auxiliary variable exceeds 7 holes/hm2, the average error and root mean square error of the co-simulation continue to decrease, suggesting that the introduction of enough PXRF as auxiliary variables can effectively improve the accuracy of the co-simulation. © 2023, The Authors. All rights reserved.

关键词： Mapping

来源：评论

学校读者我要写书评

暂无评论

Sources and identification of microplastics in soils

Soil and Environmental Health

引用

Soil and environmental Health 2023年第2期1卷

作者： Fan, Weixin Qiu, Chunsheng Qu, Qian Hu, Xiangang Mu, Li Gao, Ziwei Tang, Xin Tianjin Key Laboratory of Agro-environment and Safe-product Key Laboratory for Environmental Factors Control of Agro-product Quality Safety (Ministry of Agriculture and Rural Affairs) Institute of Agro-environmental Protection Ministry of Agriculture and Rural Affairs Tianjin 300191 China Tianjin Key Laboratory of Aqueous Science and Technology School of Environmental and Municipal Engineering Tianjin Chengjian University Tianjin 300384 China Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education) Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 300350 China

Large-scale production, rapid consumption, insufficient recovery and management, and slow degradation lead to a large accumulation of plastic waste and microplastics. Microplastics are characterized as stable, small, and having a large specific surface area and strong hydrophobicity. They are carriers of many hydrophobic organic pollutants, heavy metals, pathogenic bacteria and drug resistance genes. Worldwide, microplastic pollution in soils has attracted much attention. The progress and perspectives in the separation and detection of soil microplastics deserve a comprehensive review and discussion. Here, the sources and distributions of microplastics in soil from the use of agricultural plastic film, sludge recycling, long-term application of organic fertilizer, surface runoff, and sewage irrigation are summarized. Physical separation methods such as density separation, electrostatic separation, oil extraction and pressurized liquid extraction, and chemical extraction methods such as acid digestion, alkaline digestion, hydrogen peroxide and Fenton reagent oxidation, and enzymatic hydrolysis for soil microplastics are reviewed. Futhermore, the detection technologies of soil microplastics through microscopy, spectroscopy, mass spectrometry, thermogravimetric analysis, differential scanning calorimetry, X-ray photoelectron spectroscopy and nuclear magnetic resonance are reviewed. Finally, the perspectives are put forward from understanding the impacts of microplastics on soil functions and health, developing source control and environmental remediation technology, investigating low-cost and rapid separation and extraction methods that preserve the characteristics of microplastics, strengthen the degree of automation to avoid artificial operation error, and establish the standard methods for isolating, extracting, identifying, and quantifying microplastics in soils. This review serves as a technical reference for rapid identification of soil microplastics and builds t

关键词： Detection and monitoring Ecological and human risks Microplastics and nanoplastics Seperation and extraction Soil health Sources and distribution

来源：评论

学校读者我要写书评

暂无评论

Understanding Nitrous Acid (HONO) in the Urban Boundary Layer Using Continuous HONO Measurements at a 450 m Tall Tower in Guangzhou, China

引用

environmental science & technology 2025年第21期59卷 2025 May 22页

作者： Peng Cheng Ji Ling Yucheng Gong Wenda Yang Sihang Wang Baobin Han Xiaobing Li Bin Yuan Chenglei Pei Jin Shen Yihang Yu Li Huang Hui Deng Zhen Liu College of Environment and Climate Jinan University Guangzhou 511443 China. Institute of Mass Spectrometry and Atmospheric Environment Jinan University Guangzhou 510632 China. Guangdong Provincial Engineering Research Center for Online Source Apportionment System of Air Pollution Guangzhou 510632 China. Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality and Climate Research Jinan University Guangzhou 511443 China. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China. CAS Center for Excellence in Deep Earth Science Guangzhou 510640 China. University of Chinese Academy of Sciences Beijing 100049 China. Guangzhou Ecological and Environmental Monitoring Center of Guangdong Province Guangzhou 510060 China. Guangdong Environmental Monitoring Center Guangzhou 510308 China. Georgia Institute of Technology Atlanta Georgia 30332 United States.

Nitrous acid (HONO) is a key precursor of hydroxyl radicals (OH) in the urban atmospheric boundary layer. However, most HONO observations so far are on the ground level, while HONO chemistry at higher altitude remains largely unknown. Through one-month observations at a 450 m platform of Canton Tower in Guangzhou, China, we have identified two distinct regimes of nocturnal HONO chemistry. One is dominated by heterogeneous reactions on the ground surface, likely corresponding to the period when the platform was within the stable nocturnal boundary layer. Another regime, occurring in the residual layer, is dominated by in situ formation from oxidation of nitric oxide (NO) by OH. During the daytime, HONO from emissions and heterogeneous sources at the ground undergoes ∼60% loss through photolysis before reaching 450 m. A detailed HONO budget analysis considering chemistry and vertical transport suggests that on average 32% of the observed HONO at 450 m is from OH oxidation of NO, while there remains 51% unidentified. These findings emphasize the increased contribution of NO + OH to the overall HONO budget throughout the urban boundary layer, in contrast to the diminished role of ground-related processes, and warrant future continuous measurements at high altitudes to supplement data at the ground to develop a complete understanding of HONO chemistry in the urban boundary layer.

关键词： Canton Tower nitrous acid (HONO) residual layer sources and sinks

来源：评论

学校读者我要写书评

暂无评论

Typhoon-Induced Stormwater Drives Nutrient Dynamics and Triggers Phytoplankton Blooms in Laizhou Bay, China

SSRN

引用

SSRN 2023年

作者： Li, Hongguan Li, Shanshan Zhang, Mingzheng Li, Xiuren Xu, Zehao Ma, Haoyang Liang, Shengkang Song, Dehai Li, Junlong Ma, Yuanqing Qin, Huawei Ji, Diansheng Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China College of Chemistry and Chemical Engineering Ocean University of China Qingdao266100 China College of Oceanic and Atmospheric Sciences Ocean University of China Qingdao266100 China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao266237 China Key Laboratory of Physical Oceanography Ocean University of China Ministry of Education Qingdao National Laboratory for Marine Science and Technology Qingdao China State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring China National Environmental Monitoring Center Beijing100012 China Shandong Marine Resources and Environment Research Institute Yantai264000 China National Marine Environmental Monitoring Center China

The heavy rainfall brought by typhoons result in pulsed inputs of freshwater and nutrients, causing drastic changes in the offshore hydrographic and biogeochemical conditions in a short time. In this study, we evaluated the heavy rainfall impact of Typhoons Rumbia and Lekima on Laizhou Bay (LZB). We found that torrential rainfall significantly modified riverine nutrient concentrations, component ratios, and fluxes. Our results demonstrated that 9% and 16% of the annual riverine total nitrogen (TN) and total phosphorus (TP) fluxes were transported to the LZB within two weeks in Rumbia, and the proportions were 17% and 35% in Lekima, respectively. Influenced by terrestrial inputs, the sea surface temperature (SST) and sea surface salinity (SSS) decreased postRumbia, while the dissolved inorganic nitrogen (DIN) increased from 0.13 ± 0.13 mg/L to 0.47 ± 0.32 mg/L. Furthermore, the SST and SSS decreased by approximately 2.5 ℃ and 2.3 psu postLekima, and the concentration of DIN increased from 0.13 ± 0.08 mg/L to 0.58 ± 0.48 mg/L, which induced subsequent diatom blooms. However, rapid luxury uptake of dissolved inorganic phosphorus (DIP) by phytoplankton resulted in the LZB remaining under P-limited conditions. Freshwater and nutrient pulse input accelerated the growth of highly adaptable and small diatoms in coastal waters, and the dominant species transitioned to Skeletonema costatum after Lekima. We suggest that excess freshwater inputs alter the hydrodynamic structure and residence time, combined with other suitable factors, resulting in a dramatic increase in Noctiluca scintillans and the formation of harmful algal blooms (HABs) after a decline in diatom blooms. © 2023, The Authors. All rights reserved.

关键词： Nutrients

来源：评论

学校读者我要写书评

暂无评论

极端干旱与食草昆虫对草原群落的交互作用受干旱模式的影响

引用

Journal of Plant Ecology 2024年第3期17卷 128-140页

作者： Ye Luo Yuguang Ke Hongqiang Wang Chong Xu Qian Gu Qiang Yu Melinda D.Smith Rajabboy Madrimov Nuriddin Samatov Wei Yang Honghui Wu State Key Laboratory of Effcient Utilization of Arid and Semi-arid Arable Land in Northern China Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China School of Grassland Science Beijing Forestry UniversityBeijing 100083China Department of Biology and Graduate Degree Program in Ecology Colorado State UniversityFort CollinsCO 80523USA Research Institute of Environment and Nature Conservation Technologies of the Ministry of Ecology Environmental Protectionand Climate Change of the Republic of UzbekistanTashkent 100043Uzbekistan Institute of Microbiology of the Academy of Sciences Tashkent 100128Uzbekistan Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China

极端干旱和食草昆虫可以共同影响植物群落,并且它们的交互作用可能受到干旱模式的影响。然而,目前尚缺乏相关的观测证据。本研究以半干旱草原为研究对象,通过控制实验探讨了不同极端干旱模式与食草昆虫的交互作用对植物群落的影响。实... 详细信息

极端干旱和食草昆虫可以共同影响植物群落,并且它们的交互作用可能受到干旱模式的影响。然而,目前尚缺乏相关的观测证据。本研究以半干旱草原为研究对象,通过控制实验探讨了不同极端干旱模式与食草昆虫的交互作用对植物群落的影响。实验设置了3种干旱处理,分别为对照(自然降雨量)、慢性干旱(生长季5–8月减少66%降雨量)和急性干旱(6–7月完全无降雨)。在各小区设置了两种食草昆虫处理,分别是有食草昆虫和无食草昆虫。结果表明,食草昆虫和极端干旱及二者的交互作用对物种丰富度无显著影响。食草昆虫缓解了慢性干旱对总盖度的负面影响,而这种缓解作用在急性干旱下较低。食草昆虫对慢性干旱带来的负面效应具有更强的缓解作用,这主要是因为食草昆虫导致慢性干旱下适口性较高的杂类草(具有较低叶片碳含量、叶片干物质含量,以及较低叶片淀粉、钙、镁、锰含量)的大幅降低,进而降低了禾草的负面效应。上述结果表明,干旱和食草昆虫的交互作用受干旱模式的影响。通过调节植物的适口性来控制食草昆虫的采食行为,可以减轻极端干旱对草原生态系统的影响。

关键词：急性干旱慢性干旱半干旱草原食草昆虫极端气候

来源：评论

学校读者我要写书评

暂无评论

Medium and Heavy-Duty Diesel Vehicles are Important Nighttime Ammonia Sources in Chinese Megacities – Evidence from a Tunnel Measurement

SSRN

引用

SSRN 2023年

作者： Guo, Jiliang Peng, Jianfei Li, Zongxuan Song, Ainan Tong, Hui Sun, Bin Liang, Xiaoyu Liu, Peiji Zhang, Jinsheng Lv, Zongyan Tang, Jingchun Yang, Ning Du, Zhuofei Zhang, Qijun Wang, Ting Wu, Lin Mao, Hongjun Tianjin Key Laboratory of Urban Transport Emission Research & State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control College of Environmental Science and Engineering Nankai University Tianjin300071 China MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation College of Environmental Science and Engineering Nankai University Tianjin300350 China Tianjin Eco-Environmental Monitoring Center Tianjin300191 China

Ammonia (NH3) has been widely recognized as a key precursor of atmospheric secondary aerosol formation. Vehicle emission is a major source of urban atmospheric NH3;but few studies have quantified vehicular NH3 emission from real-world on-road fleets. In this study, a tunnel measurement was conducted in the Wujinglu tunnel in the urban area of Tianjin, China, in September 2021. The fleet-average NH3 emission factor (EF) was 11.2 mg km-1 veh-1, significantly lower than those in previous studies. Through a multiple linear regression analysis, the EFs of light-duty gasoline vehicles (LDGVs), light-duty diesel vehicles (LDDVs), medium and heavy-duty diesel vehicles (M&HDDVs) were estimated to be 5.7 mg km-1 veh-1, 40.8 mg km-1 veh-1, and 223.3 mg km-1 veh-1, respectively. Notably, the M&HDDVs emitted more NH3 than previously expected. The annual NH3 emissions of LDGVs, LDDVs, M&HDDVs were 272, 182, and 292 tons, respectively, within the urban area of Tianjin in 2021. M&HDDVs contributed more than 85% of nighttime vehicular NH3 emissions, with an annual emission of 255t a-1. The potential environmental impacts of the marked nighttime NH3 emissions from M&HDDVs should be considered in future field and modeling studies. © 2023, The Authors. All rights reserved.

关键词： Linear regression

来源：评论

学校读者我要写书评

暂无评论

Online Analysis of Volatile and Semivolatile Organic Compounds in Water Matrices Using a Dual-Channel Comprehensive Two-Dimensional Gas Chromatography Coupled with Time-of-Flight Mass Spectrometry System

SSRN

引用

SSRN 2024年

作者： Chen, Guangxu Wu, Manman Ma, Qin Li, Mei Zhou, Zhen Xu, Jingwei Waterhouse, Geoffrey I.N. Song, Ninghui Zhao, Wei-Wei School of Environment and Energy State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control South China University of Technology Guangzhou510006 China Hangzhou Lin'an Ecological Environment Monitoring Station Hangzhou311300 China Institute of Mass Spectrometry and Atmospheric Environment Guangdong Provincial Engineering Research Center for Online Source Apportionment System of Air Pollution Jinan University Guangzhou510632 China Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou510632 China Guangdong MS Institute of Scientific Instrument Innovation Guangzhou510530 China School of Chemical Sciences The University of Auckland Auckland1142 New Zealand Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment Nanjing210042 China State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering Nanjing University Nanjing210023 China

monitoring organic compounds in aquatic matrices can be a complex and time-consuming process. To address this issue, we present a novel approach that uses a dual-channel comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry (GC × GC–TOFMS) system equipped with an automatic pretreatment platform for online monitoring of volatile organic compounds (VOCs) and semivolatile organic compounds (SVOCs) in water matrices. Our automatic pretreatment platform incorporates headspace sampling (HS) and liquid–liquid extraction (LLE) to extract VOCs and SVOCs from water matrices. The GC × GC–TOFMS system features a dual-channel analytical structure column configuration, allowing for the sequential analysis of VOCs in the GC–TOFMS mode and SVOCs in the GC × GC–TOFMS mode. We quantitatively detected 55 and 104 target VOCs and SVOCs, respectively, in a water sample using the instrument system. Our method demonstrated excellent correlation coefficients ranging from 0.990 to 1.000, method detection limit ranging from 0.08 to 4.78 μg·L−1, relative standard deviation below 19.3%, and recovery rates ranging from 50.0% to 124.0%. To validate the online monitoring capabilities of our system, we tested the target SVOCs at three different concentration levels over a 3-day period. Most compounds exhibited recovery rates ranging from 70.0% to 130.0%. Furthermore, we applied our method to analyze a real water sample and successfully detected more than 100 target and nontarget VOCs/SVOCs, including alcohols, aldehydes, ketones, acids, esters, and phenols. Our results indicated the potential of our novel instrument system for effective screening and analysis of organic contaminants in aquatic matrices. This innovation provides a promising solution for improving the efficiency and accuracy of organic compound monitoring in water matrices. © 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

Precursors and potential sources of ground-level ozone in suburban Shanghai

引用

Frontiers of environmental Science & Engineering 2020年第6期14卷 5-16页

作者： Kun Zhang Jialuo Xu Qing Huang Lei Zhou Qingyan Fu Yusen Duan Guangli Xiu State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes/School of Resources&Environmental Engineering East China University of Science and TechnologyShanghai 200237China School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China Shanghai Environmental Protection Key Laboratory for Environmental Standard and Risk Management of Chemical Pollutants School of Resources&Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Shanghai Environmental Monitoring Center Shanghai 200235China

A high level of ozone(O3)is frequently observed in the suburbs of Shanghai,the reason for this high levei remains *** obtain a detailed insight on the high level of 03 during summer in Shanghai,03 and its precursors were measured at a suburban site in Shanghai from July 1;2016 to July 31,*** the Hybrid Single-Particle Lagrangian Integrated Trajectory,(HYSPLIT)model and concentration weighted trajectories(CW T),we found that Zhejiang province was the main potential *** 03 in suburban *** the sampling site was cotrolled by south-westerm winds exceeding 2 m/s,the O3-rich air masses from upwind regions(such as Zhejiang province)could be transported to *** *** propylene-equivalent concentation(PEC)and ozone formation potential(OFP)were,further calculated for each vOC species,and the resuts suggested that propylene,(m+p)-xylene,*** played dominant roles in O3 *** Ozone Isopleth Plotting Research(OZIPR)model was used to reveal the impact ofO;precursors on O3 formation,and 4 base-cases *** to adjust the model *** average *** 18.20%was achieved between the simulated and observed 03 *** 03 isopleth diagram ilustrated that 03 fomatin in July 2016 was in VOC-senstive regime,although the VOCNO,ratio was greater than *** intoducing sensitivity(S),a sensitvity analysis was performed for 03 *** *** 03 formation was senstive to propylene,(m+p)-xylene,e,o-xylene and *** results provide theoretical suppot for 0;plluton treatment in Shanghai.

关键词： Ozone OZIPR Volatile organic compounds Shanghai HYSPLIT

来源：评论

学校读者我要写书评

暂无评论

Analysis of Operation Parameters of Modified Waste Cotton Cloth Biofilm Reactor for Optimum Domestic Wastewater Treatment

SSRN

引用

SSRN 2024年

作者： Husein, Mansuur Zhao, Ru-Jin Kaba, Peter Issaka, Sakinatu Konwuruk, Niib Husein, Alhassan Abdul Latif Qadeer, Abdul Cheng, Liang State Key Laboratory of Environmental Criteria and Risk Assessment National Engineering Laboratory for Lake Pollution Control and Ecological Restoration State Environmental Protection Key Laboratory for Lake Pollution Control Chinese Research Academy of Environmental Science Beijing China School of the Environment and Safety Jiangsu University 301 Xuefu Road Zhenjiang212013 China Department of Water and Environmental Engineering Tamale Technical University P.O. Box 3 E/R Tamale Ghana The United Graduate School of Agricultural Sciences Ehime University Japan School of Environmental Studies China University of Geosciences 388 Lumo Road Wuhan430074 China

In light of the ongoing socio-economic development, considerable attention has been directed towards wastewater due to its detrimental impact on water quality and associated health risks. The efficiency of removing organic pollutants from municipal sewage in a modified waste cotton cloth biofilm reactor (MWCCBR) is heavily influenced by operational functions and micro-environmental conditions. This study aimed to identify the most favorable combination of conditions that would maximize organic pollutant removal efficiency in the biofilm reactor. To achieve this research goals, an orthogonal test was conducted to investigate the optimal operation parameters, including carrier filling rate, hydraulic retention time, oxygen demand, and temperature, in order to enhance the removal of contaminants. Through a series of orthogonal experiments involving various factor levels, the most effective removal efficiencies were achieved under the following conditions: hydraulic retention time (HRT) of 10 hours, dissolved oxygen (DO) level of 3.0 mg/L, temperature of 35°C, and a filling rate (FR) of 65.0%. Throughout the treatment period, while maintaining the stable operation of the biofilm reactor, effluent samples were collected to assess the concentrations of chemical oxygen demand (COD), ammonia-nitrogen (NH4+-N), and total phosphorus (TP), along with their corresponding removal efficiencies. During the stable and optimal operational phase of the modified waste cotton cloth biofilm reactor, the average removal efficiencies for COD, NH4+-N, and TP were found to be 96.5±0.3%, 82.8±6.6%, and 60.1±0.5%, respectively. The outcomes of this study have significant implications for alternative approaches to solid waste reduction, optimal bioreactor operation, the production of value-added recycled products, the provision of clean water, and the promotion of a sustainable environment. © 2024, The Authors. All rights reserved.

关键词： Effluents

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：