检索结果-内蒙古大学图书馆

Historical trends in the anthropogenic heavy metal levels in the tidal flat sediments of Lianyungang, China

Journal of Environmental Sciences 2013年第7期25卷 1458-1468页

作者： Rui Zhang Fan Zhang Yingjun Ding Jinrong Gao Jing Chen Li Zhou School of Geodesy and Geomatics Engineering Huaihai Institute of Technology State Key Laboratory of Pollution Control and Resources Reuse Nanjing University Jiangsu Marine Resources Development Research Institute Huaihai Institute of Technology

The sedimentation of metals can preserve the historical record of contaminant input from local and regional sources and provide information on the historical changes in regionalwater and sediment quality. We report the 210Pb activities and the heavy metal （Cd, Cr, Cu, Mn, Pb and Zn）depth profiles from sediment cores retrieved in 2010. The mean sedimentation rates of 0.85-1.5 cm/yr aredetermined by 210 Pbdating. The sediments in the tidal flat have recorded heavy metaldeposition and thus allow the establishment of a connection between the temporal evolution of the heavy metal pollution and the historical changes in the economicdevelopment of Lianyungang. The enrichment factors （EF） are calculated to estimate the level of contamination stored in these sediments. The results show that in the studied sites, Cr and Cudisplay low EF values and are mainly from lithogenic origin. For the other studied trace metals, a great variability in the sedimentary record is observed. Significant anthropogenic enrichment over the last 50 years is revealed at the tidal flat that receives fluvial inputs. Zinc is the elementwith the highest EF values, followed by the order of Pb 〉 Cd 〉 Mn 〉 Cu and Cr. The temporal variations of the heavy metals peakduring the late 1980s to the early2000s and show adecreasing trend afterward. The pollution intensity of the tidal flat isdetermined by using EF and thegeo-accumulation index （Igeo ）,which show that, based on the Igeo scale, the tidal flat of Haizhou Bay is unpolluted to moderately polluted.

关键词： sediment rates heavy metals pollution anthropogenic input tidal flat

来源：评论

学校读者我要写书评

暂无评论

Effects of the surface chemistry of macroreticular adsorbents on the adsorption of 1-naphthol/1-naphthylamine mixtures from water

引用

Journal of Environmental Sciences 2005年第5期17卷 782-785页

作者： ZHANG Wei-ming CHEN Jin-long CHEN Qun HE Min-yang PAN Bing-cai ZHANG Quan-xing State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Naniing210093 China Researeh Center for Engineering Technology of Organic Poison Control and Resources Reuse in Jiangsu Province Nanjing 210038 China Department of Chemical Engineering Jiangsu Polytechnic Changzhou 213016 China

The adsorption behaviors of 1-naphthol, 1-naphthylamine and l-naphthol/l-naphthylamine mixtures in water over two macroreticular adsorbents were investigated in single or binary batch systems at 293 K, 303 K and 313 K respectively. All the adsorption isotherms in the studied systems can be adequately fitted by Langmuir model. In the case of aminated macroreticular adsorbent NDA103, 1-naphthol is adsorbed to a larger extent than 1-naphthylamine; while, the opposite trend is found for nonpolar macroreticular adsorbent NDA100. It is noteworthy that at higher temperature（303 K and 313 K）, the total uptake amounts of 1-naphthol and 1-naphthylamine in all binary-component systems are obvious larger than the pure uptake amounts in single-component systems, which is presumably due to the cooperative effect primarily arisen from the hydrogen-bonding interaction between the loaded 1-naphthol and 1-naphthylamine molecules. The simultaneous adsorption systems were confirmed to be helpful to the selective adsorption towards 1-naphthol according to the larger selective index.

关键词： macroreticular adsorbent adsorption 1-naphthol 1-naphthylamine cooperative effect

来源：评论

学校读者我要写书评

暂无评论

Boosting catalytic oxidation of H₂S over activated carbon optimized by the synergistic effect of rich defects and nitrogen sites

引用

Surfaces and Interfaces 2025年 68卷

作者： Liu, Xin Zhao, Minghui Liu, Dongxu Yang, Jianxiao Han, Yinghui Sultana, Rabia Mohamed, Yasser M.A. Nazer, Hossam A.El Elnazer, Ahmed A. Zhang, Xin College of Ecology and Environment Nanjing Forestry University Nanjing 210037 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 101408 China Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology College of Materials Science and Engineering Hunan University Changsha 410082 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Photochemistry Department National Research Centre Dokki Giza 12622 Egypt Geological Sciences Department National Research Centre Dokki Giza 12622 Egypt

H2S selective catalytic oxidation has been considered as the most efficient method for the removal of residual H2S in Claus tail gas. Carbon materials were regarded as a promising candidate for the reaction. However, ... 详细信息

H₂S selective catalytic oxidation has been considered as the most efficient method for the removal of residual H₂S in Claus tail gas. Carbon materials were regarded as a promising candidate for the reaction. However, its performance was rather poor. This study implemented an approach to enhance the catalytic performance of activated carbon catalysts through the synergy effect of rich defects and nitrogen species. The addition of phenanthroline, a nitrogen-containing compound increased the nitrogen content in the carbon framework, and annealing under an NH₃ atmosphere generated abundant surface defects. The pyridinic nitrogen species and defects facilitated the adsorption of H₂S. Moreover, the defects can also promote the generation of superoxide radicals, further resulting in the production of SO₂ and improving the catalytic performance through the Claus reaction. The best catalytic performance was achieved with the C-N-5 catalyst, and the sulfur yield was maintained higher than 95 % even at 220 °C. Furthermore, the oxygen-containing groups on the surface of carbon materials were the reactive oxygen species and the reaction obeyed the MvK mechanism, i.e., the adsorbed H₂S reacted with the oxygen-containing groups to form elemental sulfur, while the consumed oxygen-containing groups were regenerated by molecular oxygen. © 2025

关键词： Activated carbon Defects H2S catalytic oxidation Nitrogen doping Reaction mechanism

来源：评论

学校读者我要写书评

暂无评论

Utilizing Ca3(PO4)2 and calcium superphosphate fertilizer for the passage of heavy metals in coal gangue: Mechanical insights and efficiency evaluation

引用

Environmental Engineering Research 2025年第4期30卷

作者： Zhang, Hualin Bai, Wenlong Tian, Shaojing Zhao, Mengfei Yang, Youming Jiang, Xiaoliang Li, Tinggang School of Metallurgical engineering Jiangxi University of Science and Technology Ganzhou341099 China Key Laboratory of Rare Earth Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths Jiangxi Institute of Rare Earths Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341003 China CAS Key Laboratory of Green Process and Engineering Innovation Academy for Green Manufacture National Engineering Research Center of Green Recycling for Strategic Metal Resources Beijing Engineering Research Centre of Process Pollution Control Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China Inner Mongolia Dongyuan Environmental Protection Technology Co. Ltd Ordos014300 China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China

Coal gangue is a typical industrial waste, which will bring environmental challenges and resource depletion when piled up in large quantities, and heavy metal pollution is a prominent problem. In this study, Ca3(PO4)2 and calcium superphosphate fertilizer (CSF) were utilized to passivate coal gangue at different pollution levels, and its passivation mechanism was discussed. The results show that both Ca3(PO4)2 and CSF can effectively passivate coal gangue and effectively reduce moderate or high levels of coal gangue pollution to a slight or clean level. The passivation effect of CSF is slightly better than that of Ca3(PO4)2. Through characterization of coal gangue before and after passivation and simulation with Visual MINTEQ and PHREEQC software, it is found that Ca3(PO4)2 can provide PO3 2−, while CSF releases HPO3 –, which is ionized to generate more PO3 2−, and finally forms insoluble or slightly soluble phosphate with heavy metals. Leaching experiments show that the treated samples contain obviously more stable heavy metal components, and the leaching risk is lower than that of untreated coal gangue. In summary, this method proves its effectiveness in fixing heavy metals in coal gangue and provides an effective method for the harmless treatment of coal gangue. © 2025, Korean Society of Environmental Engineers. All rights reserved.

关键词： Coal tailings

来源：评论

学校读者我要写书评

暂无评论

Effect and Cost Research for Leachate Treatment in PAC/Fenton and Fenton/PAC technology

引用

Journal of Donghua University(English Edition) 2010年第3期27卷 395-399页

作者：蒋宝军尹军吴晓燕赵玉鑫 School of Municipal and Environmental Engineering Harbin Institute of Technology Jilin Province Key Laboratory of Water Pollution Control and Resources Reuse Jilin Institute of Architectural and Civil Engineering

To compare the treatment effects and the costs of coagulation/Fenton process and Fenton/coagulation process in leachate treatment,fresh and old leachates were respestively treated with these two *** experimental results indicate that the highest chemical oxygen demand(COD)removal rate of Fenton reaction on leachate can be acquired under the conditions of pH=3.5,nH2O2/nFe2+=6,mH2O2/mCOD=3,and reaction time=4 *** chloride(PAC)coagulation has the highest COD removal rate on leachate under the condition of mPAC/mCOD=*** the optimum reaction conditions,coagulation/Fenton and Fenton/coagulation processes were respestively adopted to treat raw *** data also show that COD removal rate of coagulation/Fenton process on fresh and old leachates are 90.56% and 86.52% respectively and that of Fenton/coagulation process 89.99% and 85.99%,so there is no obvious *** the cost of coagulation/Fenton process for leachate treatment is RMB 62.6,lower than that of Fenton/coagulation ***,coagulation/Fenton process is more optimized than Fenton/coagulation process for leachate treatment.

关键词： leachate Fenton coagulant Polyaluminium chloride（PAC） chemical oxygen demand（COD）removal rate

来源：评论

学校读者我要写书评

暂无评论

Fluorinated poly（ether sulfone） ionomers with disulfonated naphthyl pendants for proton exchange membrane applications

引用

Frontiers of Materials Science 2018年第2期12卷 156-167页

作者： Zhaoxia HU Yao LU Xulve ZHANG Xiaobo YAN Na LI Shouwen CHEN Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental & Biological Engineering Nanjing University of Science and Technology Nanjing 210094 China

Proton exchange membranes based on fluorinated poly（ether sulfone）s with disulfonated naphthyl pendants （sSPFES） have been successfully prepared by post functionalization through polymeric SNAr reaction. Copolymer structure was confirmed by H-nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy, the physico-chemical properties of the sSPFES membranes were evaluated by thermogravimetric analysis, gel permeation chromatography, electro-chemical impedance spectroscopy, atomic force microscopy, Fenton, water-swelling and fuel cell test. The pendant grafting degree was controlled by varying the feeding amount of the disulfonaphthols, resulting in the ion exchange capacity about 1.28-1.73 mmollg. The obtained sSPFES membranes were thermal stable, mechanical ductile, and exhibited dimensional change less than 17%, water uptake below 70%, and proton conductivity as high as 0.17-0.28 S/cm at 90℃ in water. In a single H2/O2 fuel cell test at 80℃, the sSPFESB-3.2 membrane （1.61 mmol/g） showed the maximum power output of 593-658 mW/cm^2 at 60%-80% relative humidity, indicating their rather promising potential for fuel cell applications.

关键词： proton exchange membrane poly（ether sulfone） disulfonaphthol post functionalization fuel cell

来源：评论

学校读者我要写书评

暂无评论

Nanoscale zero-valent iron supported on biochar for the highly efficient removal of nitrobenzene

引用

Frontiers of Environmental Science & Engineering 2019年第4期13卷 167-177页

作者： Gaoling Wei Jinhua Zhang Jinqiu Luo Huajian Xue Deyin Huang Zhiyang Cheng Xinbai Jiang Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management Guangdong Institute of Eco-Environmental Science and TechnologyGuangzhou 510650China Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China

The application of nanoscale zero-valent iron (nZVI) in the remediation of contaminated groundwater or wastewater is limited due to its lack of stability, easy aggregation and iron leaching. To address this issue, nZVI was distributed on oak sawdust-derived biochar (BC) to obtain the nZVI/BC composite for the highly efficient reduction of nitrobenzene (NB). nZVI, BC and nZVI/BC were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). For nZVI/BC, nZVI particles were uniformly dispersed on BC. nZVI/BC exhibited higher removal efficiency for NB than the simple summation of bare nZVI and BC. The removal mechanism was investigated through the analyses of UV-Visible spectra, mass balance and XPS. NB was quickly adsorbed on the surface of nZVI/BC, and then gradually reduced to aniline (AN), accompanied by the oxidation of nZVI to magnetite. The effects of several reaction parameters, e.g., NB concentration, reaction pH and nZVI/BC aging time, on the removal of NB were also studied. In addition to high reactivity, the loading of nZVI on biochar significantly alleviated Fe leaching and enhanced the durability of nZVI.

关键词： Biochar Nanoscale zero-valent iron Nitrobenzene Reduction Adsorption Synergistic effec

来源：评论

学校读者我要写书评

暂无评论

CuInS2/ZnS QDs-based fluorescent probe for detection of Cu2+

引用

Progress in Natural Science:Materials International 2023年第4期33卷 495-500页

作者： Haiyan Kang Hongchao Geng Sisi Shi Zhongxian Song Yuting Dong Xiaole Yan Chaohai Wang Yanli Mao Qingyun Cai Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology Henan University of Urban Construction State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University

High concentrations of Cu2+exceeding what the required level for the cellular process can changes the properties of protein, affects the normal function of the body, but also affect the body's metabolism, so that the body's immunity appears to decline. Detection of Cu2+is important for the environmental monitoring. Here, a fluorescence probe that uses heavy metal-free and properties-superior CuInS2/ZnS was proposed for detection of Cu2+. The fluorescence intensity of CuInS2/ZnS quantum dots（QDs） decreased obviously after Cu2+were added,and the intensity with the concentration of Cu2+showed excellent linear relation within the scope of 0–50 μM, the LOD down to 0.45 μM, a possible detection mechanism was analyzed. The QDs was further applied to the detection of Cu2+in drinking water, manifesting the foreground of the current strategy.

关键词： CuInS2/ZnS QDs Fluorescence probe Detection Cu2+

来源：评论

学校读者我要写书评

暂无评论

Weakly hydrophobic nanoconfinement by graphene aerogels greatly enhances the reactivity and ambient stability of reactivity of MIL-101-Fe in Fenton-like reaction

引用

Nano Research 2021年第7期14卷 2383-2389页

作者： Yuwei Zhang Fei Liu Zhichao Yang Jieshu Qian Bingcai Pan Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Research Center for Environmental Nanotechnology(ReCENT) Nanjing UniversityNanjing 210023China

In the pursuit of heterogeneous catalysts with high reactivity,metal organic framework(MOF)nanomaterials have received tremendous ***,many MOF catalysts especially Fe-based MOFs need to be utilized immediately after synthesis or being activated using high temperature,because of the easy loss of reactivity in humid environments resulting from the occupation of active Fe sites by water ***,we describe an inspiring strategy of growing MIL-101-Fe nanoparticles inside the three-dimensional confined space of graphene aerogel(GA),generating shapeable GA/MIL-101-Fe nanocomposite convenient for practical *** to MIL-101-Fe,GA/MIL-101-Fe as catalyst demonstrates much higher reactivity in Fenton-like reaction,attributing to smaller MIL-101-Fe particle size,presence of active Fe(II)sites,and abundant defects in ***,the weakly hydrophobic nature of the composite greatly inhibits the loss of catalytic reactivity after being stored in humid air and accelerates the recovery of reactivity in mild temperature,by resisting the entrance of water molecules and helping to exclude water *** work demonstrates that a delicate design of nanocomposite structure could not only improve the reactivity of the catalytic component,but also overcome its intrinsic drawback by taking advantage of the properties of *** hope this functional nanoconfinement strategy could be extended to more scenarios in other fields.

关键词： nanoconfinement hydrophobicity MIL-101-Fe graphene aerogel Fenton-like reaction

来源：评论

学校读者我要写书评

暂无评论

Peri-urban ammonia emissions in Beijing-Tianjin-Hebei decrease with restructuring of China's livestock industry

引用

Agricultural Systems 2025年 228卷

作者： Fan, Xiangwen Wang, Haodan Winiwarter, Wilfried Zhao, Zhanqing Bai, Zhaohai Ma, Lin Key Laboratory of Agricultural Water Resources Hebei Key Laboratory of Soil Ecology Center for Agricultural Resources Research Institute of Genetic and Developmental Biology Chinese Academy of Sciences 286 Huaizhong Road Hebei Shijiazhuang 050021 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing 210023 China Pollution Prevention Biotechnology Laboratory of Hebei Province School of Environmental Science and Engineering Hebei University of Science and Technology Shijiazhuang 050018 China International Institute for Applied Systems Analysis (IIASA) Schlossplatz 1 Laxenburg A-2444 Austria Institute of Environmental Engineering University of Zielona Góra Licealna 9 PL Zielona Góra 65-417 Poland School of Land Science and Space Planning Hebei GEO University 136 East Huai’ an Road Yuhua District Hebei Shijiazhuang 050031 China

CONTEXT: Ammonia (NH3) emissions from livestock production significantly contribute to formation of PM2.5, posing a major environmental concern. Over the past two decades, compared to other regions in China, Beijing, ... 详细信息

CONTEXT: Ammonia (NH₃) emissions from livestock production significantly contribute to formation of PM_2.5, posing a major environmental concern. Over the past two decades, compared to other regions in China, Beijing, Tianjin and Hebei (BTH) region, has been suffering from high NH₃ emissions due to increased urbanization and resulting intensified agricultural production. Uneven distribution of livestock leads to separation of crop and livestock, resulting in the waste of manure resources and environmental pollution. OBJECTIVE: This study systematically investigates the 2000–2019 temporal-spatial pattern of NH₃ emissions in the BTH region, with three focuses on: (1) analyzing the spatial distribution of livestock, the efficiency of livestock manure utilization, and the characteristics of NH₃ emissions;(2) elucidating impact of restructuring livestock industry on NH₃ emissions;(3) developing scenarios analysis to propose potential optimization pathways for reducing livestock NH₃ emissions. METHODS: We utilized the NUFER model to analyze livestock NH₃ emissions in the BTH region. The distribution of livestock was further elucidated through a panel analysis, which identified key factors shaping their spatial arrangement. Scenarios analysis (S1: coupling crop and livestock, S2: spatial planning) was applied to explore optimization pathways of reducing NH₃ emission. RESULTS AND CONCLUSIONS: The study reveals an initial increasing trend in livestock NH₃ emissions, peaking in 2015 at 511 kt NH₃, followed by a sharp decline to 401 kt NH₃ in 2019. Spatially, emission hotspots concentrated in the northeastern BTH region. Based on restructuring of China's livestock industry, the number of livestock started to decrease in areas designated as “urban sprawl” or for “ecological protection”, while the number of livestock in other land (land except those

关键词： Ammonia emission Livestock distribution Mitigation potential Sustainable agricultural system Temporal-spatial trends

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：