典型的农业和农村地区土壤中的重金属污染:来源分配和衍生风险量化
Dongyang Men1, Xuan Li2, Xiaozhe Zhu3
1Langfang Integrated Natural Resources Survey Center, China Geological Survey, 93 Guangyang Road, Guangyang District, Langfang, 065000, People's Republic of China.
Environmental monitoring and assessment
|November 20, 2024
概括
长市土壤中的重金属污染主要来自燃煤和工业活动. 虽然生态风险较低,但人类健康风险超过了极限,特别是在东中部地区.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 风险评估 风险评估
背景情况:
- 全球土壤受到重金属 (HM) 的污染,需要对土地管理进行准确的来源识别.
- 农业和农村地区在评估HM污染和相关风险方面面临着挑战.
研究的目的:
- 在兰芳市量化分配HM源并评估环境和人类健康风险.
- 确定土地使用和管理的优先控制因素.
主要方法:
- 采用了包括正矩阵分解 (PMF) 在内的多种模型组合来进行源分配.
- 分析了土壤样本以确定HM含量并评估生态和人类健康风险.
主要成果:
- 确定了五个主要的HM来源:燃煤 (24.9%),工业活动 (23.1%),农业活动 (19.2%),自然来源 (16.6%) 和交通排放 (16.3%).
- 生态风险并不显著,但人类健康风险超过了可接受的限度,主要来自工业和自然来源.
- (As), (Cr) 和 (Ni) 导致非致癌风险;Cr在致癌作用中占主导地位.
- 高风险地区集中在东中部地区.
结论:
- 人类活动显著影响土壤中HM积累.
- 需要有针对性的干预措施,以减轻来自特定人体质量源和高风险地区的人体健康风险.
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