汪文玲, 龙邹霞, 余兴光, 张继伟, 林辉. 厦门市筼筜污水处理厂中微塑料的特征研究[J]. 海洋环境科学, 2019, 38(2): 205-210. DOI: 10.12111/j.mes20190207
引用本文: 汪文玲, 龙邹霞, 余兴光, 张继伟, 林辉. 厦门市筼筜污水处理厂中微塑料的特征研究[J]. 海洋环境科学, 2019, 38(2): 205-210. DOI: 10.12111/j.mes20190207
WANG Wen-ling, LONG Zou-xia, YU Xing-guang, ZHANG Ji-wei, LIN Hui. Microplastics characteristic in Yundang Wastewater Treatment Plant of Xiamen[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2019, 38(2): 205-210. DOI: 10.12111/j.mes20190207
Citation: WANG Wen-ling, LONG Zou-xia, YU Xing-guang, ZHANG Ji-wei, LIN Hui. Microplastics characteristic in Yundang Wastewater Treatment Plant of Xiamen[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2019, 38(2): 205-210. DOI: 10.12111/j.mes20190207

厦门市筼筜污水处理厂中微塑料的特征研究

Microplastics characteristic in Yundang Wastewater Treatment Plant of Xiamen

  • 摘要: 滨海城市污水处理厂作为微塑料进入海洋的途径之一,对其微塑料污染物特征展开研究,有助于认识和了解人类活动对海洋环境的影响,但目前国内对该问题的研究还相对较少。本研究以厦门筼筜污水处理厂为例,设计改进采样装置和实验方法,对其进出水以及污泥中的微塑料污染物特征进行研究。结果表明,该污水处理厂进水中微塑料浓度为1.703个/L,初级处理出水为1.090个/L,二级处理出水为0.324个/L,去除率分别为35.99%、80.97%。初级处理污泥微塑料浓度为2.14×103个/kg,二级处理污泥为6.62×103个/kg。该污水处理厂污水中微塑料形态以纤维(43.89%)为主,颗粒(32.85%)次之;颜色以白色(34.95%)为主,透明(22.74%)次之;主要成分以PP(21.17%)为主,PS(18.39%)次之。污泥中微塑料形态以碎片(68.9%)为主,颗粒(34.78%)次之;颜色以黄色(39.13%)为主,黑色(17.39%)和白色(13.04%)次之;主要成分以PP(34.78%)为主,PE(26.09%)次之。每日经过该污水厂排入厦门西海域的微塑料数量约为9.72×104个,数量巨大不容忽视。本研究结果表明污水处理厂在减少城市微塑料污染物进入海洋方面发挥了重要作用,但仍具有较大的提升空间。

     

    Abstract: Wastewater treatment plants in coastal cities is a main source for microplastics in the ocean.Characteristic of microplastics can improve our understandings of the impacts of human activities on the marine environment.However, there is a lack of such information in China.In this study, microplastic pollution in Xiamen Yundang Wastewater Treatment Plant was studied.We designed an improved sampling device and an experimental method to study the characteristics of microplastics in the influent, effluent and sludge.The results show that the microplastic abundance in the influent, primary and secondary treatment discharge is 1.703, 1.090 and 0.324 pieces/L, respectively.The microplastic removal rates in the primary and secondary treatment discharge are 35.99% and 80.97% respectively.The concentrations of microplastics in primary and secondary sludge are 2.14×103 and 6.62×103 pieces/kg, respectively.The shape of microplastics are dominated by 43.89% of fiber and 32.85% of pellet in the wastewater and 68.9% of fragment and 34.78% of pellet in the sludge.The primary colors are white (34.95%), followed by transparent (22.74%) in the wastewater.While it is dominated by yellow (39.13%), black (17.39%), and white (13.04%) in the sludge.The chemical composition is primarily composed of 21.17% of PP and 18.39% PS in the wastewater and 34.78% of PP and 26.09% of PE in the sludge.It is estimated that~9.72×104 pieces of microplastics are discharged into the Xiamen West Sea each day.Our findings show that waste water treatment plants play an important role in reducing urban microplastic pollutants entering the ocean, but it requires higher microplastic removal efficiency.

     

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