陈心悦,
张彦峰,
沈兆爽,
祝凌燕
南开大学环境科学与工程学院, 环境污染过程与基准教育部重点实验室, 天津市城市生态环境修复与污染防治重点实验室, 天津 300071

作者简介: 陈心悦(1992-),女,硕士,研究方向为环境化学,E-mail:chenxinyue90s@sina.com.

基金项目: 国家水体污染控制与治理科技重大专项子课题(2017ZX07301002)


中图分类号: X171.5

Ecological Risk Assessment of γ-HCH for Freshwater Sediment of Seven Major River Systems in China

Chen Xinyue,
Zhang Yanfeng,
Shen Zhaoshuang,
Zhu Lingyan
Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China

CLC number: X171.5

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摘要:林丹(γ-HCH)作为曾广泛应用的有机氯农药，自2000年在中国停止生产以来，全国范围内环境介质中仍广泛检出，对生物体及自然环境存在潜在危害。在收集γ-HCH的沉积物毒性数据基础上，通过物种敏感度分布(Species Sensitivity Distributions, SSD)曲线拟合的方法获得其沉积物质量基准。选取7种常用模型进行拟合，通过比较，最终采用S-Logistic模型拟合γ-HCH急性毒性曲线，得到急性基准值CMC_sed=0.00530 μg·g^-1；采用S-Gompertz模型拟合γ-HCH慢性毒性曲线，得到慢性基准值CCC_sed=0.00106 μg·g^-1。我国七大水系68.2%的水体沉积物中γ-HCH的残留浓度均低于其CCC_sed，说明其风险较低。但是，在海河和辽河流域某些点位的残留超标，需要引起足够的重视。所获得的沉积物基准值对评估沉积物中γ-HCH的生态风险和环境修复具有重要指导意义。
关键词: γ-HCH/
物种敏感度分布/
沉积物质量基准/
相平衡分配法

Abstract:As one of the widely used organochlorine pesticides, lindane (γ-HCH) has been banned since 2000, but still can be detected in the environment throughout China and may pose potential adverse effects to organisms and the environment. In this study, toxicity data of γ-HCH in sediment were collected and grouped. Then, its sediment quality criterion were derived by fitting the data using Species Sensitivity Distribution (SSD) method. Among the seven commonly used SSD models, S-Logistic and S-Gompertz models fitted the acute and chronic toxicity curves the best, respectively. Developed acute sediment quality criteria was CMC_sed=0.00530 μg·g^-1, and chronic sediment quality criteria was CCC_sed=0.00106 μg·g^-1. These sediment quality criteria provided scientific guidance for the assessment on ecological risks of γ-HCH and environment remediation.
Key words:γ-HCH/
SSD/
sediment quality criteria/
equilibrium partitioning approach.