State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Water Sciences, Beijing Normal University, Beijing 100875, China; Research Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Research Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
J Hazard Mater. 2023 Jun 5;451:131199. doi: 10.1016/j.jhazmat.2023.131199. Epub 2023 Mar 13.
Microplastics (MPs) are ubiquitous in the environment and have been verified to be harmful to organisms. The petrochemical industry is a possible contributor, for it is the primary plastic producer but is not focused on. In this background, MPs in the influent, effluent, activated sludge, and expatriate sludge of a typical petrochemical wastewater treatment plant (PWWTP) were identified by the laser infrared imaging spectrometer (LDIR). It revealed that the abundances of MPs in the influent and effluent were as high as 10310 and 1280 items/L with a removal efficiency of 87.6%. The removed MPs accumulated in the sludge, and the MP abundances in activated and expatriate sludge reached 4328 and 10767 items/g, respectively. It is estimated that 1440,000 billion MPs might be released into the environment by the petrochemical industry in 2021 globally. For the specific PWWTP, 25 types of MPs were identified, among which Polypropylene (PP), Polyethylene (PE), and Silicone resin were dominant. All of the detected MPs were smaller than 350 µm, and those smaller than 100 µm prevailed. As for the shape, the fragment was dominant. The study confirmed the critical status of the petrochemical industry in releasing MPs for the first time.
微塑料（MPs）在环境中无处不在，已被证实对生物有害。石化行业是一个可能的贡献者，因为它是主要的塑料生产商，但却没有受到关注。在此背景下，采用激光红外成像光谱仪（LDIR）对典型石化废水处理厂（PWWTP）的进水、出水、活性污泥和剩余污泥中的 MPs 进行了鉴定。结果表明，进水中 MPs 的丰度高达 10310 项/L，出水中 MPs 的丰度高达 1280 项/L，去除效率为 87.6%。去除的 MPs 会在污泥中积累，活性污泥和剩余污泥中的 MPs 丰度分别达到 4328 和 10767 项/g。据估计，2021 年全球石化行业可能向环境中释放了 14400 万亿个 MPs。对于特定的 PWWTP，共鉴定出 25 种 MPs，其中以聚丙烯（PP）、聚乙烯（PE）和硅树脂为主。所有检测到的 MPs 都小于 350µm，其中小于 100µm 的 MPs 占主导地位。至于形状，以碎片为主。该研究首次证实了石化行业在释放 MPs 方面的关键地位。
