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工业区污水处理厂中的微塑料:特征,命运和风险评估
Emine Büşra Çolakoğlu1, İbrahim Uyanık2,3, Hamdi Mıhçıokur2,3
1Graduate School of Natural and Applied Sciences, Environmental Engineering Dept, Erciyes University, Kayseri, Turkey.
工业废水处理厂 (WWTP) 将大量的微塑料 (MP) 释放到河流中. 较小的MP积聚在污泥中,即使有88%的清除,每天的排放也会给环境带来风险,需要先进的处理.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 水处理工程水处理工程
背景情况:
- 大多数微塑料 (MP) 研究重点是市政废水处理厂 (WWTP).
- 工业WWTPs,与织品和塑料等多样化的行业,呈现独特的MP挑战.
- 了解工业WWTP中的MP命运和清除对于环境保护至关重要.
研究的目的:
- 在工业WWTP中描述微塑料 (MP),包括数量,形状,尺寸和聚合物类型.
- 调查工业WWTP中的移除效率和国会议员的命运.
- 对常见的MP聚合物类型在废水中发现的环境风险进行环境风险评估.
主要方法:
- 在一个工业区 (WWTP) 进行了每月三次采样活动.
- 在废水和污泥中分析了MP的丰度,形状,颜色,大小和聚合物类型.
- 使用EPI SuiteTM建模用于MP聚合物类型的环境风险评估.
主要成果:
- 在污泥中发现的MP度最高 (3,734MP/L);在废水中发现的MP度最低 (52MP/L).
- 较小的MP (125250微米) 积聚在污泥中,而较大的MP (425微米5毫米) 则通过初级处理去除.
- 聚烯 (38%),聚乙烯 (24%) 和聚乙烯二甲 (11%) 是主要的聚合物类型;纤维和碎片是最常见的形状.
- 环境风险评估表明,PVC,PET和PS比PP和PE带来更高的风险.
- 总体上,MP清除效率为88%,但每天排放1.5x10^9个MP到河里.
结论:
- 工业用WWTP是MP污染的重要来源,较小的MP积聚在污泥中.
- 尽管移除率很高,但MP排放量很大,对水生生态系统和灌水构成风险.
- 对于工业WWTP来说,三级处理过程对于减轻MP排放和防止土壤污染至关重要.
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