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

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

张福祥^1,2,
崔嵩^1,2, ,,
朱乾德³,
高尚^1,2,
李昆阳^1,2

1. 东北农业大学水利与土木工程学院国际持久性有毒物质联合研究中心, 哈尔滨 150030;
2. 东北农业大学松花江流域生态环境保护研究中心, 哈尔滨 150030;
3. 南京水利科学研究院, 南京 210029

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

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出版历程
- 收稿日期: 2020-05-20

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

ZHANG Fu-xiang^1,2,
CUI Song^{1,2
, ,},
ZHU Qian-de³,
GAO Shang^1,2,
LI Kun-yang^1,2

1. International Joint Research Center for Persistent Toxic Substances(IJRC-PTS), School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China;
2. Research Center for Eco-Environment Protection of Songhua River Basin, Northeast Agricultural University, Harbin 150030, China;
3. Nanjing Hydraulic Research Institute, Nanjing 210029, China

摘要

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。
- 七星河湿地 /
- 水环境 /
- 重金属 /
- 污染特征 /
- 潜在风险
Abstract: The pollution levels, spatial distribution, and human health risks of heavy metals in aquatic environment of a typical wetland in Sanjiang Plain were investigated and evaluated. The concentrations of Cu, Cr, Cd, Zn, and Ni were detected in multi-media (water, sediment, and wild fish species) collected from Qixing River wetland. The results showed that the average concentration of heavy metals were in the sequence of Zn (28.0) > Cr (4.5) > Cu (3.2) > Ni (2.6) > Cd (0.1) in water (μg/L), and Zn (139.4) > Cr (81.9) > Ni (45.7) > Cu (24.4) > Cd (0.2) in sediments (mg/kg). All concentrations of heavy metals measured in the water samples were lower than China’s National Standard of Surface Water Quality I, while the concentrations of Zn and Cd in sediments were elevated and compared to the soil environmental background value of Heilongjiang. Except for the concentration of Ni in Perccottus glenii samples were below the detection limit, all the heavy metals were detected in the wild fish species. And moderate accumulation of Zn was found in Cobitis granoe, while the four other heavy metals in wild fish species were in low accumulation status. The single risk factor (CF), taking the Aquatic Life Water Permissible Limits and Sediments Quality Guideline as the reference value, indicated a high risk threat to the aquatic organisms as affected by Cr alone, and Cr contributed most to the comprehensive risk index (PLI). The target hazard quotients (THQ) and hazard indexes (HI) of these five heavy metals were bellow 1, indicating that there was no non-carcinogenic risk via consumption of wild fish; while the carcinogenic risk metrics (CR) of Cd exceeded the cancer risk threshold (10^-5), indicative in elevation of cancer incidence in local consumers.
- Qixing River wetland /
- aquatic environment /
- heavy metals /
- pollution characteristic /
- potential risk

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