| 典型煤矸石堆积区土壤重金属特定源健康风险评价及优先控制源分析 |
| 摘要点击 1039 全文点击 222 投稿时间：2024-03-06 修订日期：2024-04-25 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 煤矸石 重金属 源解析 健康风险 空间分布 |
| 英文关键词 coal gangue heavy metals source analysis health risk spatial distribution |
|
| 中文摘要 |
| 煤矸石含有的重金属在长期堆积过程中可通过多种途径释放到周边环境中,对人体健康造成潜在威胁. 为有效控制和预防煤矸石堆积区土壤重金属对人体的健康风险,选择淮南潘一煤矸石堆积区为研究对象,采集并测定土壤中Cd、Zn、Cu、Fe、Mn、Cr、Ni和Pb的含量；基于正定矩阵因子分解模型（PMF）定量解析土壤重金属污染源贡献,耦合源解析结果和健康风险评价模型评估特定源的健康风险,并进一步明确了不同来源健康风险贡献率的空间分布特征. 结果表明,土壤重金属Cd和Zn含量平均值分别为土壤背景值的4.65倍和2.16倍,其余重金属含量平均值均低于背景值,其中Zn受人类活动影响最大. 源解析表明,研究区土壤重金属受煤矸石堆积污染源、交通活动污染源、自然母质成土来源和农业活动污染源的影响,贡献率分别为27.5%、16.4%、30.4%和25.6%. 土壤重金属对儿童的非致癌风险需要引起重点关注,特定源-健康风险评估模型分析表明农业活动对儿童非致癌风险的贡献最大（59.3%）,为优先控制源. 基于不同来源健康风险空间分布特征,建议加强煤矸石的资源化利用,对煤矸石淋滤液进行收集处理,并采取相应的环境管理措施减少农药和化肥的使用. |
| 英文摘要 |
| Heavy metals contained in coal gangue can be released into the surrounding environment through various pathways during long-term accumulation, posing potential threats to human health. To effectively control and mitigate the health risks of heavy metals in the soil of coal gangue accumulation areas, this study focused on the Panyi coal gangue accumulation area in Huainan. The study involved collecting soil samples to determine the concentrations of Cd, Zn, Cu, Fe, Mn, Cr, Ni, and Pb and employed the positive matrix factorization model for quantitative analysis of the contributions from different pollution sources of soil heavy metals. This approach, coupled with the results of the source analysis and a health risk assessment model, evaluates the risks posed by specific sources and further identifies the spatial distribution characteristics of health risk contributions from these sources. The results showed that the average concentrations of soil heavy metals Cd and Zn were 4.65 and 2.16 times their background values, respectively, with the average values of other heavy metals all below background levels. Among them, Zn was the most influenced by human activities. Source analysis indicated that the sources of soil heavy metals in the study area were influenced by coal gangue accumulation pollution, traffic activity pollution, natural parent material soil formation, and agricultural activity pollution sources, with contribution rates of 27.5%, 16.4%, 30.4%, and 25.6%, respectively. The non-carcinogenic risk of soil heavy metals to children requires special attention. Based on the specific source-health risk assessment model analysis, agricultural activities contributed the most to the non-carcinogenic risk to children （59.3%）, identifying them as a priority source for control measures. Given the spatial distribution of health risks from various sources, recommendations include enhancing the resourceful use of coal gangue, collecting and treating leachate from coal gangue, and implementing environmental management strategies to reduce pesticide and fertilizer use. |
|
|
|
