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Evaluation of heavy metal contamination hazards in nuisance dust particles, in Kurdistan Province, western Iran

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Journal of Environmental Sciences 2013年第7期25卷 1346-1354页

作者： Reza Bashiri Khuzestani Bubak Souri Department of Environmental Sciences Faculty of Natural Resources University of Kurdistan

The effects of natural andgeochemical factors depending on heavy metal contamination in nuisance dust particles were evaluated. The nuisance dust particles were sampled using passive deposit gauge method for one year from April2010 to March2011 and the obtained samples were measured for the total contents and the contamination levels of Fe, Mn, Cu and As usinggeo-accumulation index （Igeo ）, enrichment factor （EF） and the integrated pollution index （IPI）. The results showed that, the contamination levels of Fe and Mn based on Igeo values, were uncontaminated （Igeo 〈 0）（variations of the Igeo index was from -3.11 to -1.751 for Fe, from -0.630 to -1.925 for Mn）, while the values of Cu and As were demonstrated to have moderate contamination based on Igeo values （variations of Igeo index was from -1.125 to 0.848 for Cu, and from -2.002 to 1.249 for As）. The analysis of EF also revealed minor to moderate enrichment for Mn （1.215-4.214）, minor to moderately severe enrichment for Cu （2.791-6.484）, and As （1.370-8.462）, respectively. The variation of the IPI index also showed low to moderate level of heavy metal pollution in nuisance dust particulates （0.511-1.829）. The analysis of the results also approved that the natural processes andgeochemical variables （the changing meteorological parameters） can significantly affect the availability of heavy metals in nuisance dust particles in Western Iran.

关键词： heavy metal contamination nuisance dust deposit gauge method geo-accumulation index enrichment factor integrated pollution index

Ecological risk assessment for heavy metal contamination of a new consideration—Agricultural soils

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Acta Geochimica 2006年第S1期 123-123页

作者： Barbara Sherriff Department of Geological Sciences University of Manitoba Winnipeg Manitoba Canada R3T 2N2

Graphene oxide/multi-walled carbon nanotubes/gold nanoparticle hybridfunctionalized disposable screen-printed carbon electrode to determine Cd(II)and Pb(II)in soil

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International Journal of Agricultural and Biological Engineering 2019年第3期12卷 194-200页

作者： Hui Wang Yuan Yin Guo Zhao Fernando Bienvenido Isabel M.Flores-Parrad Zhiqiang Wang Gang Liu Key Laboratory of Modern Precision Agriculture System Integration Research Ministry of Education and Key Laboratory of Agricultural Information Acquisition TechnologyMinistry of AgricultureChina Agricultural UniversityBeijing 100083China Department of Informatics University of AlmeriaAlmeriaSpain College of Computer Science and Technology Shandong University of TechnologyZibo 255049China Research Institute of Wood Industry Chinese Academy of ForestryBeijing 100091China

Cadmium(Cd)and lead(Pb)in soil or water environment cause the ecological destruction and environmental deterioration when their contents exceed the natural background *** trace the concentrations of Cd(II)and Pb(II),a sensitive and selective electrode was developed using disposable screen-printed carbon electrode(SPE)immobilized with a composite film of reduced graphene oxide/carboxylation multi-walled carbon nanotubes/gold nanoparticle hybrid(RGO-MWNT-AuNP)throughπ-π*** highly conductive nano-composite layer,“RGO-MWNT-AuNP,”was characterized by scanning electron microscopy,UV-visible spectrometer,cyclic voltammetry,and electrochemical impedance *** wave stripping voltammetry was applied to RGO-MWNT-AuNP/SPE to electroplate bismuth film and monitor the Cd(II)and Pb(II)*** obtain high current responses,the detecting parameters were *** optimized conditions,the current responses showed a linear relationship with the concentrations of Cd(II)and Pb(II)in the range from 1.0 to 80.0μg/L with a lower detection limit of 0.7μg/L and 0.3μg/L(S/N=3),***,the prepared electrode was further employed to detect Cd(II)and Pb(II)in soil samples with good results.

关键词： electrochemical electrode heavy metal contamination screen-printed carbon electrode graphene gold nanoparticle lead cadmium multi-walled carbon nanotube

Development of one-class classification method for identifying healthy *** from those contaminated with uncertain heavy metals by LIBS

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International Journal of Agricultural and Biological Engineering 2023年第4期16卷 200-205页

作者： Zhonghao Xie Xi’an Feng Xiao Chen Guangzao Huang Xiaojing Chen Limin Li Wen Shi Chengxi Jiang Shuwen Yu School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072China Wenzhou Institute of Industry&Science Wenzhou 325035ZhejiangChina College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035ZhejiangChina Information Technology Center Wenzhou UniversityWenzhou 325035ZhejiangChina

Laser-induced breakdown spectroscopy(LIBS)can be used for the rapid detection of heavy metal contamination of Tegillarca granosa(***),but an appropriate classification model needs to be *** the one-class classification method,only target samples are needed in training process to achieve the recognition of abnormal samples,which is suitable for rapid identification of healthy *** from those contaminated with uncertain heavy *** construction of a one-class classification model for heavy metal detection in *** by LIBS has faced the problem of high-dimension and small *** solve this problem,a novel one-class classification method was proposed in this ***,the principal component scores and the intensity of the residual spectrum were combined as extracted ***,a one-class classifier based on Mahalanobis distance using the extracted features was constructed and its threshold was set by leave-one-out *** sensitivity,specificity and accuracy of the proposed method were reached to 1,0.9333 and 0.9667 respectively,which are superior to the previously reported methods.

关键词： laser-induced breakdown spectroscopy heavy metal contamination Tegillarca granosa one-class classification

Impact of coal power generation on the characteristics and risk of heavy metal pollution in nearby soil

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Ecosystem Health and Sustainability 2020年第1期6卷 412-423,411页

作者： Yiqun Zhang Di Wu Chenxing Wang Xiao Fu Gang Wu State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of Architecture Design and Research Chinese Academy of SciencesBeijingChina

Introduction:The development of coal power base(CPB)poses a severe challenge to the *** conducted a soil survey in Xilinhot CPB,to evaluate and analyze the pollution characteristics,potential ecological risk,and sources of six heavy metals(As,Pb,Cu,Zn,Mn,and Cd)in soil by using Geo-accumulation index,revised Nemerow integrated pollution index(RNIPI),and potential ecological risk index(RI).Outcomes/other:The results showed that the pollution of Cd and As were *** mean of Cd and As were 1.11 mg·kg^(-1) and 25.13 mg·kg^(-1),which were 42.55 times and 4.41 times higher than its local background *** Geo-accumulation indices showed the contamination degree of Cd was strong and As was moderate,and the status of Cu,Pb,Zn,and Mn were *** was strongly contaminated based on its RNIPI and RI ***:The accumulations of As,Pb,and Cd were mainly associated with anthropogenic sources,including coal mining and combustion,and industrial exhaust ***,Mn,and Zn were primarily originated from the parent material(natural sources).Conclusion:This study provides scientific basis and effective countermeasures for the prevention and control of soil pollution in surrounding areas of CPB.

关键词： Soil pollution heavy metal contamination potential ecological risk sustainability coal power base Xilinhot

heavy metal pollution increases soil microbial carbon limitation:Evidence from ecological enzyme stoichiometry

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Soil Ecology Letters 2021年第3期3卷 230-241页

作者： Mingzhe Xu Yongxing Cui Jingzi Beiyuan Xia Wang Chengjiao Duan Linchuan Fang State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of SciencesMinistry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100049China School of Environment and Chemical Engineering Foshan UniversityFoshan 528000China CAS Center for Excellence in Quaternary Science and Global Change Chinese Academy of SciencesXi’an 710061China

heavy metals can exist in soil for a long time and seriously affect soil *** coexistence of various heavy metal pollutants leads to biotoxicity and alters the activity of *** microbial metabolism plays an important role in nutrient cycling and biochemical processes of soil ***,the effects of heavy metal contamination on microbial metabolism in soil are still *** study aims to reveal the responses of microbial metabolic limitation to heavy metals using extracellular enzyme stoichiometry,and further to evaluate the potential impacts of heavy metal pollution on soil nutrient *** results showed that soil microbial metabolism reflected by the ecoenzymatic activities had a significant response to soil heavy metals *** metabolism was limited by soil carbon(C)and phosphorus(P)under varied heavy metal levels,and the increase of heavy metal concentration significantly increased the microbial C limitation,while had no effect on microbial P *** may increase the energy investment in metabolism to resist heavy metal stress and thus induce C *** results suggest that energy metabolism selected by microorganisms in response to long-term heavy metal stress could increase soil C release,which is not conducive to the soil C *** study emphasizes that ecoenzymatic stoichiometry could be a promising methodology for evaluating the toxicity of heavy metal pollution and its ecological effects on nutrient cycling.

关键词： heavy metal contamination Microbial metabolisms Ecoenzymatic stoichiometry Soil nutrient limitation

An analysis of River Derwent pollution and its impacts

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Journal of Groundwater Science and Engineering 2015年第1期3卷 39-44页

作者： DAI Wen-Bin ZHANG Wei-Jun COWEN Taha School of Land and Food Department of Environmental Study and Geography Tasmania University

As the major water catchment in Hobart city, the River Derwent provides water services to Hobart residents; however, water quality of the River Derwent is becoming unreliable. The aims of this paper are to identify the major water issues in the river and to reveal its impacts on Hobart residents and ecosystem. A methodology of secondary data analysis has been involved; which covers a wide range of existing dissertations. Through all the analysis of data, heavy metals, contaminated sediment and overload nitrogen can be regarded as three main causes of the water pollution. Moreover, the impacts of the water pollution are proved to be significant and perennial. On the basis of the analysis result, water pollution tends to be a tough issue that requires a great amount of time and efforts to deal with.

关键词： Water pollution heavy metal contamination Contaminated sediment

GIS Mapping, Biomonitoring and Distribution of heavy metal Concentrations Using Neem (Azadirachta indica) Bark in Makurdi Town, Benue State, Nigeria

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Journal of Geoscience and Environment Protection 2023年第7期11卷 213-226页

作者： Ada Florence Ogli Mohammed Ahmed Adams Udoji Itodo Raymond Ahulle Wuana Rufus Sha’Ato Department of Chemistry Akawe Torkula Polytechnic Makurdi Nigeria Department of Geography Bayero University Kano Nigeria Department of Chemistry/Centre for Agrochemical Technology Joseph Sarwuan Tarka University Makurdi Nigeria

The present work determined the concentration and spatial distribution of heavy metals (As, Hg, Cr, Cd and Pb) in soil samples from Makurdi and its environs using geographic information system (GIS). The specific objective is to produce the spatial distribution maps showing the spatial distribution of toxic heavy metals in the study area. Inverse Distance Weighting (IDW), a GIS technique was used to produce dotted maps showing the spatial distribution of heavy metals in neem bark for better visualization of contamination zones and non-contamination zones. The map reveals few hotspot areas showing areas of high concentrations of the heavy metals investigated which were identified in red colours, the following concentration ranges were obtained;As (4.71 - 6.43 mg/kg), Cd (13.9 - 16.84 mg/kg), Cr (46.3 - 60.84 mg/kg), Hg (3.70 - 5.05 mg/kg) and Pb (24.02 - 31.34 mg/kg). These hotspot areas were found close to business outlets, fuel filling and service stations, farm sites where the application of fertilizers and pesticides were persistent coupled with heavy traffic of vehicles and other machinery which was associated with As, Hg, Cd, Pb and Cr been released into the environment thus, suggesting anthropogenic activities controlling the concentration of these heavy metals in the study areas. The cumulative effect of these heavy metals into the barks of neem could pose as danger, because this plant is used as herbs in folk medicine.

关键词： heavy metal contamination Spatial Distribution Inverse Distance Weighting Folk Medicine Makurdi

Comparative Evaluation of Calcium, Magnesium, Copper and Zinc Removal by Wood Ash, Sodium Carbonate and Sodium Hydrogen Phosphate

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Journal of Environmental Protection 2021年第7期12卷 454-461页

作者： Lovell Agwaramgbo Jailen Doyle Corneisja Harrison Honour Williams Chemistry Department Dillard University New Orleans USA

Remediation via adsorption process has been proven to be one of the best water treatment technologies globally. Many adsorbents, including agricultural wastes, have been considered for the removal of a variety of pollutants from water. However, most of the studies reported in the literature used metal concentrations below 1000 ppm. It is also known that initial metal concentrations in polluted aqueous solutions, as well as metal and adsorbent type, are some of the factors that affect metal removal. Therefore, this project examined the remediation of water contaminated by 1000 ppm of lead, zinc, copper, magnesium, and calcium ions using wood ash, sodium hydrogen phosphate (dibasic), and sodium carbonate (dibasic). Comparative analysis of the results showed the order of order of metal removal by the adsorbents as: dibasic phosphate (Ca > Cu > Pb > Zn > Mg);dibasic Carbonate (Pb ~ Ca > Zn > Cu > Mg);Wood ash (Mg > Cu > Zn > Pb > Ca). These results suggest that metal and adsorbent type as well as the inherent chemical properties of these metal cations may contribute to the varying binding affinity of the metals to the adsorbent ligand(s) and thus, affect the extent of metal removal. It is equally worthy to note that wood ash more effectively removed hardness metals (Mg and Ca) from water than the inorganic phosphate and carbonate ions.

关键词： Phytoremediation metal Adsorption Water Hardness heavy metal contamination