Air Quality Research Division, Science and Technology Branch, Environment Canada, 4905 Dufferin Street, Toronto, Ontario M3H 5T4, Canada.
Environ Pollut. 2011 Oct;159(10):2380-6. doi: 10.1016/j.envpol.2011.07.002. Epub 2011 Jul 23.
Volatile methyl siloxanes (VMSs) are a class of chemicals with an increasing range of applications and widespread distribution in the environment. Passive air samplers (PAS) comprising sorbent-impregnated polyurethane-foam (SIP) disks were first calibrated and then deployed around two wastewater treatment plants (WWTPs) and at two landfill sites to investigate inputs of VMSs to air. SIP-derived air concentrations for ΣVMSs (ng/m(3)) at background sites on the perimeter of the WWTP were 479 ± 82.3 and comparable to results for the upwind samples at the landfills (333 ± 194). Order of magnitude higher concentrations of ΣVMSs (ng/m(3)) were found for on-site samples at the WWTPs (3980 ± 2620) and landfills (4670 ± 3360). Yearly emissions (kg/yr) to air were estimated and ranged from 60-2100 and 80-250, respectively, for the cyclic VMSs. These findings demonstrate and quantify for the first time, waste sector emissions of VMSs to the atmosphere.
挥发性甲基硅氧烷（VMSs）是一类化学物质，其应用范围越来越广泛，在环境中分布广泛。包含浸渍吸附剂的聚氨酯泡沫（SIP）圆盘的被动空气采样器（PAS）首先进行了校准，然后在两个污水处理厂（WWTP）和两个垃圾填埋场周围进行了部署，以调查 VMSs 对空气的输入情况。在 WWTP 周边背景点，SIP 衍生的ΣVMSs（ng/m³）空气浓度为 479±82.3，与垃圾填埋场的上风样本结果相当（333±194）。在 WWTP 和垃圾填埋场现场样本中，ΣVMSs（ng/m³）的浓度高出数量级（3980±2620 和 4670±3360）。估计了每年向空气中排放的量（kg/yr），对于环状 VMSs，分别为 60-2100 和 80-250。这些发现首次证明并量化了废物部门向大气排放 VMSs 的情况。
