School of Environment, Tsinghua University, Beijing 10084, China; Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education of China, Tsinghua University, Beijing 100084, China.
School of Environment, Tsinghua University, Beijing 10084, China; Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education of China, Tsinghua University, Beijing 100084, China.
Environ Int. 2016 Dec;97:15-27. doi: 10.1016/j.envint.2016.10.010. Epub 2016 Oct 19.
Aromatic compounds (ACs) emitted from landfills have attracted a lot of attention of the public due to their adverse impacts on the environment and human health. This study assessed the health risk impacts of the fugitive ACs emitted from the working face of a municipal solid waste (MSW) landfill in China. The emission data was acquired by long-term in-situ samplings using a modified wind tunnel system. The uncertainty of aromatic emissions is determined by means of statistics and the emission factors were thus developed. Two scenarios, i.e. 'normal-case' and 'worst-case', were presented to evaluate the potential health risk in different weather conditions. For this typical large anaerobic landfill, toluene was the dominant species owing to its highest releasing rate (3.40±3.79g·m·d). Despite being of negligible non-carcinogenic risk, the ACs might bring carcinogenic risks to human in the nearby area. Ethylbenzene was the major health threat substance. The cumulative carcinogenic risk impact area is as far as ~1.5km at downwind direction for the normal-case scenario, and even nearly 4km for the worst-case scenario. Health risks of fugitive ACs emissions from active landfills should be concerned, especially for landfills which still receiving mixed MSW.
垃圾填埋场排放的芳香族化合物（ACs）因其对环境和人类健康的不利影响而引起了公众的广泛关注。本研究评估了中国城市生活垃圾（MSW）填埋场工作面逸散的 ACs 对健康的风险影响。通过使用改良的风洞系统进行长期原位采样获得了排放数据。采用统计学方法确定了芳香族排放的不确定性，并因此制定了排放因子。提出了“正常情况”和“最坏情况”两种情景，以评估不同天气条件下的潜在健康风险。对于这个典型的大型厌氧填埋场，由于甲苯的释放率最高（3.40±3.79g·m·d），因此它是主要的芳香族化合物。尽管非致癌风险可以忽略不计，但 ACs 可能会对附近地区的人类带来致癌风险。乙苯是主要的健康威胁物质。对于正常情况，累积致癌风险影响区域在顺风方向可达约 1.5km，对于最坏情况，甚至可达近 4km。应关注活性垃圾填埋场逸散 ACs 排放的健康风险，特别是对于仍在接收混合 MSW 的垃圾填埋场。
