了解溶解有机特性对提高水再利用凝结性能的影响
Yasha Jathan1, Krishna R Pagilla1, Eric A Marchand1
1Department of Civil and Environmental Engineering, University of Nevada, Reno, Reno, NV, 89557, USA.
Chemosphere
|July 6, 2023
概括
增强凝固在水重复利用过程中有效地去除一些溶解有机 (DON),但与较小的水友化合物作斗争. 需要进一步的研究,以提高在先进的废水处理中DON清除效率.
科学领域:
- 环境科学 环境科学
- 水处理工程水处理工程
- 分析化学 分析化学
背景情况:
- 越来越多的人对先进的水处理方法越来越感兴趣.
- 溶解有机 (DON) 构成了废水废水的很大一部分.
- 在增强的凝固过程中对DON去除的理解有限.
研究的目的:
- 为了研究在增强凝固过程中溶解有机 (DON) 的去除.
- 评估DON特征 (分子量,水友性) 对去除效率的影响.
- 为优化废水处理策略提供见解,以重复利用水.
主要方法:
- 在用聚氨酸化物和铁化物凝结之前和之后,对三级处理废水样本进行了分析.
- 样品的大小被分成分子重量类别 (<3 kDa,310 kDa,0.110 μm,0.45 μm).
- 使用C18固相提取分离水友和水分离;使用光激发发射矩阵分析DON特征.
主要成果:
- 溶解的有机化合物小于3kDa占总DON的大部分.
- 强化凝血从较大的分数 (0.45μm0.1μm和0.1μm10kDa) 中去除了80%以上的DON.
- 对于较小的分数 (<3kDa和310kDa),特别是水友性DON化合物,去除效率较低 (<20%).
结论:
- 增强凝血在去除低分子量,水友性DON化合物方面效率较低.
- 该过程有效地去除类似酸的物质,但很难去除蛋白质化合物.
- 调查结果强调需要改进策略,以针对特定的DON分量,以有效的废水再利用.
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