农村固体废物和污水污泥共同处置的垃圾填埋场的VOC排放:识别,扩散和影响
Tong Gao1, Chen Wang2, Fengguang Chai3
1State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China.
Environmental research
|July 17, 2025
概括
垃圾填埋场的挥发性有机化合物 (VOC) 显著导致空气污染. 这项在中国西北部的研究确定了关键的VOC,评估了它们对健康的风险,并建议用密气材料覆盖废物以减轻分散.
科学领域:
- 环境科学 环境科学
- 空气质量研究 空气质量研究
- 污染物分析 污染物分析
背景情况:
- 挥发性有机化合物 (VOC) 的垃圾填埋排放是一个主要的空气污染问题.
- 研究了在中国西北部的一个垃圾填埋场,使用污水厂污泥作为覆盖材料.
研究的目的:
- 为了研究一个干燥,寒冷地区的垃圾填埋场的VOC排放特征.
- 评估已识别的VOC的扩散,毒性和致癌风险.
- 提出对VOC污染的缓解策略.
主要方法:
- 检测和量化43个挥发性有机化合物.
- 模糊复合评估用于污染物优先排序.
- 用于扩散模拟的高斯羽毛模拟.
- 环境保护局 (EPA) 的风险评估技术.
主要成果:
- 芳香和氧化的VOCs占主导地位,其度高达412.15 mg/m3.
- 在屋顶和工作区域中增加的VOC;在下风边界占主导地位的芳香和化合物.
- 确定了七种优先控制污染物,并评估了它们的扩散和健康风险.
- styrene,trimethylbenzene和toluene显示出高的臭氧产生潜力;toluene和 benzene为二次气溶作出了贡献.
- 风向下500米以内严重的VOC污染,风险延伸到430米.
结论:
- 来自垃圾填埋场的VOC污染对健康构成重大风险,包括慢性毒性和致癌性.
- 建议使用HDPE薄膜等气密材料覆盖非填埋区域,以防止VOC分散.
- 结果为有效减轻垃圾填埋所排放的VOC和相关的二次污染提供了洞察力.
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