| 温州主要入海河流6种重金属的空间分布及风险评估 |
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| 引用本文： | 徐慧韬,徐秀丽,王丽平.温州主要入海河流6种重金属的空间分布及风险评估[J].水生态学杂志,2021(1). |
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| 作者姓名： | 徐慧韬 徐秀丽 王丽平 |
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| 作者单位： | 中国地质大学（北京）;中国环境科学研究院 |
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| 基金项目： | 国家重点研发计划(2016YFC1402206)。 |
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| 摘 要： | 了解浙江温州地区主要入海河流重金属空间分布特征,合理评价研究区域水体重金属的潜在生态风险。在温州地区3条主要入海河流瓯江、飞云江和鳌江分析6种重金属的含量和空间分布,采用重金属污染指数法(HPI)和物种敏感性分布法(SSD)进行生态风险分析。Cu、Pb、Zn、Cd、Cr、As的浓度分别为12.46~1 830.01、2.94~372.79、19.58~435.04、0.06~0.79、14.11~192.98和1.59~63.95μg/L,平均值分别为801.68、73.80、168.61、0.26、81.06和23.53μg/L。HPI评估结果表明,O4、F2、A1和A2 4个站位重金属污染程度高,F1站位污染程度中等,O1、O2、O3和A3污染程度低;其中对水体重金属污染贡献程度较高的4种重金属分别为Cu、Pb、Cd和Cr。SSD风险评价结果表明,Cu、Zn、Cr和As在所有站位的表现均为高生态风险,Pb在O4和A2站位表现为高生态风险,说明这5种重金属对所在区域水生生物具有较高的潜在危害。2种方法从不同角度对重金属的潜在生态风险进行了评价,能有效规避单一评价方法的不足,互为补充。
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| 关 键 词： | 入海河流 重金属 生态风险评价 温州 |
Spatial Distribution and Risk Assessment of Six Heavy Metals in Rivers Flowing into Sea at Wenzhou,Zhejiang Province |
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| XU Hui-tao,XU Xiu-li,WANG Li-ping.Spatial Distribution and Risk Assessment of Six Heavy Metals in Rivers Flowing into Sea at Wenzhou,Zhejiang Province[J].Journal of Hydroecology,2021(1). |
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| Authors: | XU Hui-tao XU Xiu-li WANG Li-ping |
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| Affiliation: | (School of Ocean Sciences,China University of Geosciences,Beijing 100083,P.R.China;Water Environmental Research Institute,Chinese Research Academy of Environmental Sciences,Beijing 100012,P.R.China) |
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| Abstract: | Wenzhou City is located in the southeast of Zhejiang Province with industries that are associated with heavy metals. In order to understand the basic situation of heavy metal pollution in the coastal waters of Wenzhou City, we investigated the spatial distribution characteristics of six heavy metals(Cu, Pb, Zn, Cd, Cr and As) in three major rivers flowing to the sea(the Oujiang, Feiyun and Aojiang Rivers), and the potential risk posed by each heavy metals was assessed using the heavy metal pollution index(HPI) and species sensitivity distribution(SSD). Water samples were collected at nine representative sites near the industrial zone on May 15-16, 2017(O1-O4 in Oujiang River, F1-F2 in Feiyun River and A1-A3 in Aojiang River) and the six heavy metals were determined using ICP-MS. The degree of heavy metal pollution at each sampling station was closely related its proximity to the industry zone. The metal concentration ranges and mean values(μg/L) were as follows: Cu(12.46-1 830.01, 801.68), Pb(2.94-372.79, 73.80), Zn(19.58-435.04, 168.61), Cd(0.06-0.79, 0.26), Cr(14.11-192.98, 81.06) and As(1.59-63.95, 23.53). The HPI indicated that heavy metal pollution was high at sites O4, F2, A1 and A2;moderate at site F1;and low at sites O1, O2, O3 and A3. The metals posing the highest potential risk in the three rivers were, in order: Cu, Pb, Cd and Cr. The ecological risk assessment, based on SSD, showed that Cu, Zn, Cr and As posed a high ecological risk at all sites, and Pb posed a high ecological risk at sites O4 and A2, indicating that these five heavy metals all posed a risk of adverse impact to aquatic organisms. The HPI and SSD were calculated and compared in this study to more comprehensively evaluate the potential ecological risk of heavy metals and avoid the shortcomings of a single evaluation method. We recommend that the HPI could be used to determine the degree of pollution, and the SSD could be used to evaluate the ecological risk posed by toxic heavy metals. The risk analysis carried out in this study provides basic information on a key group of contaminants to guide future monitoring and development of pollution control measures. |
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| Keywords: | rivers flowing into sea heavy metals ecological risk assessment Wenzhou City |
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