Occurrence and Behavior of Methylsiloxanes in Urban Environment in Four Cities of China

Yao Jiang, Junyu Guo (), Ying Zhou (), Boya Zhang and Jianbo Zhang
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Yao Jiang: College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China
Junyu Guo: College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China
Ying Zhou: State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
Boya Zhang: Department of Epidemiology, University of Michigan, Ann Arbor, MI 48103, USA
Jianbo Zhang: State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China

IJERPH, 2022, vol. 19, issue 21, 1-11

Abstract: Methylsiloxanes (MSs), used in industrial production and personal care products, are released in various environmental media. In this study, we combined monitoring and modeling to investigate the occurrence and behavior of MSs in the urban environment in China. MSs were widely found in the air, water, soil and sediment of four cities in China. The concentrations of MSs in all four environmental media of Zhangjiagang were higher than those in the other three cities (Beijing, Kunming and Lijiang), indicating that the siloxane production plant had a significant impact on the pollution level of MSs in the surrounding environment. The samples with high MS concentrations were all from the sample sites near the outlet of the WWTPs, which showed that the effluent of the WWTPs was the main source of MS pollution in the surrounding environment. The modeling results of the EQC level III model showed that D4 discharged into the environment was mainly distributed in the air, while D5 and D6 were mainly distributed in the sediment. CMSs (D4–D6) discharged into various environmental media could exist in the urban environment for a long time with low temperatures in cities. When the temperature was 0 °C, the residence time of D5 and D6 could be 68.1 days and 243 days in the whole environmental system in Beijing. This study illustrates the importance of CMSs (D4–D6) in low-temperature environments and the potential environmental risks that they may pose.

Keywords: methylsiloxane; multi-media environment; environmental behavior; EQC model; monitoring (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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