重庆两潭河重金属污染及综合风险评价

Q3 Chemical Engineering

Chemical Speciation and Bioavailability Pub Date : 2016-06-29 DOI:10.1080/09542299.2016.1204626

Lei Wang, Li-ao Wang, Wei Yang, Xue Zhao, Xuejie Song

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引用次数: 4

摘要

摘要采用原子吸收光谱法分析了重庆两潭河水体和沉积物中重金属(Pb、Cr、Zn、Mn)的分布和组分。引入Pearson相关系数、生物利用度指数、土壤累积指数和潜在生态风险指数对重金属来源进行分类和环境风险评价。Pb、Cr、Zn主要存在于残余部分和铁锰氧化物结合部分，Mn主要存在于碳酸盐结合部分和残余部分。沉积物中Mn、Pb、Zn、Cr来源于不同的共同来源。Igeo和均为Pb b> Zn > Cr > Mn。地质堆积指数表明，梁滩河受Pb、Zn污染程度较重，分别为2 ~ 4级和2 ~ 3级。从整个梁潭河流域来看，平均风险指数为45.1，属于低风险水平。

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Contamination and comprehensive risk assessment of heavy metals in Liangtan River, Chongqing, China

Abstract Distribution and fraction of heavy metals (Pb, Cr, Zn, and Mn) in water and sediment in Liangtan River, Chongqing was analyzed using the atomic absorption spectrometry method. Pearson correlation coefficient, bioavailability index, geoaccumulation index and potential ecological risk index were introduced to classify the source and assess the environmental risk of the heavy metal. Pb, Cr, and Zn mainly existed in residual fraction and fraction bounded to Fe–Mn oxides while Mn mainly existed in the fraction bounded to carbonates and the residual fraction. Mn and Pb, Zn and Cr in the sediment were confirmed originating from, separate common sources. Igeo and were both in the order of Pb > Zn > Cr > Mn. Geoaccumulation indexes demonstrated that the Liangtan River has been heavily polluted by Pb and Zn with the class of 2–4 and 2–3, independently. From viewpoint of the whole Liangtan River, the mean RI (45.1) belonged to low risk level.

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来源期刊

Chemical Speciation and Bioavailability 环境科学-毒理学

CiteScore

1.62

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： Chemical Speciation & Bioavailability ( CS&B) is a scholarly, peer-reviewed forum for insights on the chemical aspects of occurrence, distribution, transport, transformation, transfer, fate, and effects of substances in the environment and biota, and their impacts on the uptake of the substances by living organisms. Substances of interests include both beneficial and toxic ones, especially nutrients, heavy metals, persistent organic pollutants, and emerging contaminants, such as engineered nanomaterials, as well as pharmaceuticals and personal-care products as pollutants. It is the aim of this Journal to develop an international community of experienced colleagues to promote the research, discussion, review, and spread of information on chemical speciation and bioavailability, which is a topic of interest to researchers in many disciplines, including environmental, chemical, biological, food, medical, toxicology, and health sciences. Key themes in the scope of the Journal include, but are not limited to, the following “6Ms”: Methods for speciation analysis and the evaluation of bioavailability, especially the development, validation, and application of novel methods and techniques. Media that sustain the processes of release, distribution, transformation, and transfer of chemical speciation; of particular interest are emerging contaminants, such as engineered nanomaterials, pharmaceuticals, and personal-care products. Mobility of substance species in environment and biota, either spatially or temporally. Matters that influence the chemical speciation and bioavailability, mainly environmentally relevant conditions. Mechanisms that govern the transport, transformation, transfer, and fate of chemical speciation in the environment, and the biouptake of substances. Models for the simulation of chemical speciation and bioavailability, and for the prediction of toxicity. Chemical Speciation & Bioavailability is a fully open access journal. This means all submitted articles will, if accepted, be available for anyone to read, anywhere, at any time. immediately on publication. There are no charges for submission to this journal.