在白朗河流域上游土壤重金属的高密度采样:污染特征,来源和以来源为导向的健康风险评估
Zongjun Gao1, Huibin Sheng1,2, Bing Jiang3,4
1College of Earth Science and Engineering, Shandong University of Science and Technology, Qianwangang Road 579, Huangdao District, Qingdao, 266590, Shandong Province, People's Republic of China.
Environmental geochemistry and health
|July 29, 2024
概括
贝朗河流域上部 (UBRB) 的土壤重金属通常处于非污染水平,对生态风险低. 然而,特定的金属如 (Hg) 和 (Cd) 存在风险,尤其对儿童来说,工业制造业是主要来源.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 毒理学 毒理学 毒理学
背景情况:
- 重金属对土壤健康,作物质量和人类福祉构成重大威胁.
- 了解HM污染对于环境风险评估和管理至关重要.
研究的目的:
- 调查贝朗河流域 (UBRB) 上层土壤中的重金属的特性,来源和风险.
- 评估与该地区土壤HM污染相关的生态和人类健康风险.
主要方法:
- 使用污染指数 (Pi,Igeo) 来识别主要的HM污染物.
- 使用模糊的综合评估和Ei指数来评估生态风险,确定Hg和Cd为主导.
- 应用正矩阵分解 (PMF) 来确定HM源.
- 对不同人群的评估非致癌和致癌风险.
主要成果:
- 在UBRB中的土壤通常不污染,总体生态风险较低.
- (Ni) 和 (Cr) 通过Pi和Igeo指数被确定为主要污染物.
- (Hg) 和 (Cd) 被确定为占主导地位的生态风险因素.
- 确定了五个主要的HM来源:塑料加工 (17%),能源活动 (7%),母材料 (15%),运输和农业 (29%) 和工业制造 (32%).
- 自然来源占非致癌风险的43%,工业制造业占致癌风险的45%.
- 成年人面临可接受的风险,但儿童在西部和中部地区经历了潜在的非致癌风险 (13.19%) 和显著的不可接受的致癌风险 (57.21%).
结论:
- 虽然UBRB的总体土壤HM水平较低,但特定的污染物 (Hg,Cd) 和来源 (工业制造) 构成局部风险.
- 儿童特别容易受到致癌风险的影响,需要有针对性的环境管理策略.
- 来源分配强调了工业活动和混合来源对HM污染的重大贡献.
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