在阿曼废水处理厂的微塑料清除效率和风险分析
Abrar Al-Amri1, Zeinab Yavari1, Mohammad Reza Nikoo1
1Department of Civil and Architectural Engineering, Sultan Qaboos University, Muscat, Oman.
Chemosphere
|May 6, 2024
概括
在阿曼的废水处理厂释放大量的微塑料 (MPs) 进入环境,其清除效率在77-82%之间. 大多数废水MP都是小纤维,主要是聚烯和聚乙烯.
科学领域:
- 环境科学 环境科学
- 水处理技术 水处理技术
- 污染控制 污染控制
背景情况:
- 微塑料 (MP) 是一个新兴的环境污染物,废水处理厂 (WWTP) 被确定为重要来源.
- 了解WWTP中的MP污染对于减轻环境风险至关重要.
研究的目的:
- 评估在三个阿曼水上水电站的微塑料负载,采用膜生物反应器 (MBR),测序批量反应器 (SBR) 和常规活性泥 (CAS) 处理.
- 为了确定MPs的度,形态,大小,颜色和聚合物类型,在流入,废水和污泥中.
- 评估与PM污染相关的生态和人类健康风险.
主要方法:
- 废水和污泥从流入,废水和污泥中取样.
- 使用 (1mm45μm),芬顿试剂氧化和化密度分离的过.
- 减弱总反射度里埃变换红外光谱 (ATR-FTIR) 用于聚合物识别.
- 污染负载指数 (PLI),危险指数 (HI) 和PROMETHEE风险评估方法.
主要成果:
- 废水中的MP平均度为:0.99MP/L (WWTP A),1.38MP/L (WWTP B) 和0.93MP/L (WWTP C). 废水中的MP平均度为:0.99MP/L (WWTP A),1.38MP/L (WWTP B) 和0.93MP/L (WWTP C). 废水中的MP平均度为:0.99MP/L (WWTP A),1.38MP/L (WWTP B),0.93MP/L (WWTP C).
- 总体MP删除效率: 82.5% (WWTP A),77.4% (WWTP B) 和79.2% (WWTP C). 总体MP删除效率: 82.5% (WWTP A),77.4% (WWTP B) 和79.2% (WWTP C). 总体MP删除效率: 82.5% (WWTP A),77.4% (WWTP B) 和79.2% (WWTP C). 总体MP删除效率: 82.5% (WWTP A),77.4% (WWTP B) 和79.2% (WWTP C). 总体MP删除效率: 82.5% (WWTP A),77.4% (WWTP B) 和79.2% (WWTP C). 总体MP删除效率:
- 废水MP主要是小 (<425微米) 的纤维,主要是聚烯 (PP),低密度聚乙烯 (LDPE),聚氨 (PU),聚乙烯四甲酸盐 (PET) 和聚乙烯 (PVC).
结论:
- 经过处理的废水废水和污泥是微塑料释放到环境中的重要途径.
- 该研究强调了在废水处理中需要先进的MP清除策略.
- 风险评估表明,PM污染可能引起生态和人类健康问题.
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