[煤炭发电厂周围农田重金属污染的特征和来源分析]
Jun Zhang1,2, Xu Li1, Lei-Yu Liu1
1Shannxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, Baoji University of Arts and Sciences, Baoji 721013, China.
Huan jing ke xue= Huanjing kexue
|December 15, 2023
概括
燃煤发电厂的重金属污染对周围的农田土壤产生重大影响,对生态构成非常严重的风险. 主要来源包括燃煤,工业活动和交通,需要有针对性的土壤污染控制战略.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 土壤科学 土壤科学
背景情况:
- 燃煤发电厂是重金属排放的重要来源.
- 了解这些排放对周边农业土壤的影响对于环境保护至关重要.
- 之前的研究已经强调了重金属在各种生态系统中的潜在风险.
研究的目的:
- 调查在煤电厂附近的农田土壤中重金属的分布,特性和生态风险.
- 确定导致土壤中重金属污染的主要来源.
- 为有效的土壤污染控制措施提供数据.
主要方法:
- 建立31个农田土壤采样站点,使用以发电厂烟为中心的辐射环方法.
- 使用感应合等离子体质谱法 (ICP-MS) 确定10种重金属.
- 使用地理统计空间位和AERMOD扩散模型分析空间差异化,使用PMF受体模型进行源分配.
主要成果:
- 量化了Pb,Mn,Zn,Cr,Ni,Cu,As,Co,Hg和Cd的平均度,Hg,Pb,Cd,As,Zn和Cu的平均度超过了省级的背景值.
- 平均潜在生态风险指数 (RI) 为714.53 (强生态风险), (Hg) 显示非常强的生态风险 (E_i = 520.92).
- 重金属来源被确定为煤炭燃烧 (32.16%),工业/农业活动 (19.78%),自然来源 (26.25%) 和交通 (21.81%) 的除尘. 在距离工厂1-2公里的地方观察到高度.
结论:
- 燃煤发电厂周围的农田土壤表现出严重的重金属污染,并构成严重的生态风险,特别是来自.
- 燃煤排放,工业活动和交通是土壤重金属污染的主要原因.
- 该研究为受发电厂排放影响的地区的有针对性的土壤污染控制和风险管理提供了必要的数据.
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