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七星河湿地水环境重金属污染特征与风险评价

张福祥 崔嵩 朱乾德 高尚 李昆阳

张福祥, 崔嵩, 朱乾德, 高尚, 李昆阳. 七星河湿地水环境重金属污染特征与风险评价[J]. 环境工程, 2020, 38(10): 68-75. doi: 10.13205/j.hjgc.202010011
引用本文: 张福祥, 崔嵩, 朱乾德, 高尚, 李昆阳. 七星河湿地水环境重金属污染特征与风险评价[J]. 环境工程, 2020, 38(10): 68-75. doi: 10.13205/j.hjgc.202010011
ZHANG Fu-xiang, CUI Song, ZHU Qian-de, GAO Shang, LI Kun-yang. POLLUTION CHARACTERISTIC AND RISK ASSESSMENT OF HEAVY METALS IN AQUATIC ENVIRONMENT OF QIXING RIVER WETLAND[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 68-75. doi: 10.13205/j.hjgc.202010011
Citation: ZHANG Fu-xiang, CUI Song, ZHU Qian-de, GAO Shang, LI Kun-yang. POLLUTION CHARACTERISTIC AND RISK ASSESSMENT OF HEAVY METALS IN AQUATIC ENVIRONMENT OF QIXING RIVER WETLAND[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(10): 68-75. doi: 10.13205/j.hjgc.202010011

七星河湿地水环境重金属污染特征与风险评价

doi: 10.13205/j.hjgc.202010011
基金项目: 

国家重点研发计划(2017YFC0404503);黑龙江省优秀青年科学基金(YQ2019E001);黑龙江省博士后启动基金(LBH-Q17010);中央财政支持地方高校发展专项资金优秀青年人才项目。

详细信息
    作者简介:

    张福祥(1996-),男,硕士研究生,主要从事农业水土资源环境效应研究。Zhangfuxiang823@163.com

    通讯作者:

    崔嵩(1981-),男,博士,副教授,主要从事农业水土资源环境效应研究。cuisong-bq@neau.edu.cn

POLLUTION CHARACTERISTIC AND RISK ASSESSMENT OF HEAVY METALS IN AQUATIC ENVIRONMENT OF QIXING RIVER WETLAND

  • 摘要: 为识别农业区湿地水环境中重金属的污染水平、空间分布特征和风险传递效应,采集了三江平原七星河湿地水体、沉积物和鱼类样品,并测定了Cu、Cr、Cd、Zn和Ni 5种重金属的含量。结果表明:水体和沉积物中重金属的平均含量由高到低依次为Zn (28.0) > Cr (4.5) > Cu (3.2) > Ni (2.6) > Cd (0.1)(水体,μg/L)和Zn (139.4) > Cr (81.9) > Ni (45.7) > Cu (24.4) > Cd (0.2)(沉积物,mg/kg)。水体中所有重金属含量均优于GB 3838—2002《地表水环境质量标准》Ⅰ类标准,而所有采样点沉积物中的Zn和Cd均超过黑龙江省土壤背景值(Zn:70.7 mg/kg;Cd:0.086 mg/kg)。除葛氏鲈塘鳢(Perccottus glenii)未检出Ni外,东北湖鱥(Phoxinus percnurus)和北方花鳅(Cobitis granoei)中5种重金属均有检出,且北方花鳅对Zn的富集已达到"中等富集"水平,鱼类样品中其他重金属均处于"低富集"状态。以水生生物允许限值和沉积物质量指南作为参考限值的单因子风险指数(CF)的计算结果表明,水体和沉积物中的Cr对水生生物构成了"高风险",且Cr对综合风险指数(PLI)的贡献最高。鱼类样品中5种重金属的目标危害系数(THQ)和综合危害指数(HI)均<1(Cr对HI的贡献率超过70%),表明长期食用七星河湿地野生鱼类不会引起非致癌风险,但食用野生鱼类暴露Cd的癌症风险指数(CR)超过10-5,存在引发癌症风险的可能。
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  • 收稿日期:  2020-05-20

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