污染区域的识别,受体模型导向的来源和可能的健康危害,以优先考虑在土壤中重金属管理的控制措施
Ram Proshad1, S M Asharaful Abedin Asha2, Md Anwarul Abedin3
1State Key Laboratory of Mountain Hazards and Engineering Safety, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Journal of environmental management
|September 1, 2024
概括
纳拉扬吉土壤中的重金属 (HMs) 污染造成了不可接受的健康风险,主要来自工业来源. 迫切需要对农业,汽车和工业排放进行管理,以减轻土壤污染并保护人类健康.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 风险评估 风险评估
背景情况:
- 农业土壤中的重金属污染对生态健康和人类福祉构成重大风险.
- 识别污染源和主要污染物对于有效的环境管理至关重要.
- 孟加拉国纳拉扬市因工业和农业活动而面临潜在的土壤污染挑战.
研究的目的:
- 确定孟加拉国纳拉扬的农业土壤中的污染区域和重金属的关键来源.
- 评估与重金属污染相关的环境和人类健康危害.
- 为环境管理者提供科学见解,以应对土壤污染和完善行业标准.
主要方法:
- 土壤静态环境容量 (QI) 用于污染区域的识别.
- 受体建模,特别是正矩阵因子化 (PMF),确定了污染源.
- 蒙特卡洛模拟 (MCS) 用于对人类健康危害的概率评估.
主要成果:
- 确定 (Cd) 是主要的重金属,表明土壤受到严重污染.
- 超过99%的地区显示 (Ni) 和 (Cd) 污染,而 (Cr) 污染状况不确定.
- 工业活动 (46%) 是重金属的主要来源,其次是农业 (29%) 和车辆排放 (25%).
- 在成人和儿童中发现了不可接受的致癌和非致癌健康风险,儿童面临的风险更高.
- 工业业务对致癌风险做出了重大贡献,主要来自Ni和Cr.
结论:
- 纳拉扬农业土壤中的重金属污染对环境和人类健康构成重大风险,特别是来自工业来源的重金属污染.
- 有效管理人为来源,包括工业排放,对于减轻土壤污染至关重要.
- 该研究为制定补救策略和改进环境法规提供了有价值的数据.
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