School of Environment, Tsinghua University, Beijing 100084, China.
Department of Environmental Engineering, Technical University of Denmark, Miljoevej, Building 113, 2800Kgs, Lyngby, Denmark.
J Hazard Mater. 2017 Apr 5;327:35-43. doi: 10.1016/j.jhazmat.2016.11.046. Epub 2016 Dec 14.
Degradation of mechanically sorted organic fraction (MSOF) of municipal solid waste in composting facilities is among the major contributors of volatile compounds (VCs) generation and emission, causes nuisance problems and health risks on site as well as in the vicinages. The aim of current study was to determine the seasonal (summer and winter) variation and human health risk assessment of VCs in the ambient air of different processing units in MSOF at composting plant in China. Average concentration of VCs was 58.50 and 138.03mg/m in summer and winter respectively. Oxygenated compounds were found to be the highest concentration (46.78-91.89mg/m) with ethyl alcohol as the major specie (43.90-85.31mg/m) in the two seasons respectively. Nevertheless, individual non-carcinogenic (Hazard relation i.e HR<1) and carcinogenic risk (CR<1.0E-04) of the quantified VCs were within acceptable limit except naphthalene at biofilter unit. In addition, cumulative non-carcinogenic risk exceeded from the threshold limit both in summers and winters in all units except at biofilter unit during winter. Furthermore cumulative carcinogenic risk also exceeded at same unit during the summer season. Therefore special attention should be made to minimize cumulative non-carcinogenic and carcinogenic risk as people are well exposed to mixture of compounds, not to individual.
在堆肥设施中，城市固体废物的机械分拣有机物（MSOF）的降解是挥发性化合物（VCs）生成和排放的主要原因之一，会在现场以及周边地区造成滋扰问题和健康风险。本研究的目的是确定中国堆肥厂 MSOF 不同处理单元环境空气中 VCs 的季节性（夏季和冬季）变化和人体健康风险评估。夏季和冬季 VCs 的平均浓度分别为 58.50 和 138.03mg/m。在这两个季节中，含氧化合物的浓度最高（46.78-91.89mg/m），其中乙醇是主要物质（43.90-85.31mg/m）。然而，除了生物过滤器单元中的萘之外，所量化的 VCs 的个体非致癌（危害比即 HR<1）和致癌风险（CR<1.0E-04）均在可接受范围内。此外，在夏季和冬季的所有单元中，除冬季的生物过滤器单元外，累积非致癌风险均超过了阈值限制。此外，在夏季，同一单元的累积致癌风险也超过了该限制。因此，应特别注意将累积非致癌和致癌风险降至最低，因为人们会接触到混合物，而不是单个化合物。
