Activated carbon and organic matter characteristics impact the adsorption of DBP precursors when chlorine is added prior to GAC contactors
文献类型：期刊论文
| 作者 | Erdem, Cagri Utku; Ateia, Mohamed; Liu, Chao; Karan, Tanju |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 184页码:1-9 |
| 关键词 | Activated carbon Porosity Pre-chlorination Disinfection byproducts Br-DBPs Natural organic matter Effluent organic matter |
| ISSN号 | 0043-1354 |
| 英文摘要 | Pre-chlorination (i.e. dosing chlorine prior to granular activated carbon (GAC) contactors) was recently introduced as a promising method to reduce the formation of disinfection byproducts (DBPs). However, our understanding on the effect of natural organic matter (NOM) and GAC characteristics on prechlorination efficiency is still elusive. Thus, we have designed this systematic study to investigate the effects of GAC characteristics (i.e. surface area, pore size, and surface charge) on the subsequent reduction of DBP formation using five well-characterized adsorbents with three different NOM under three initial Br- concentrations. The results revealed that the adsorption of halogenated DBPs precursors mostly occurs in the mesoporous region (i.e. 2 nm < pore size <50 nm) of the adsorbents. Subsequently, prechlorination before treatment with HD3000 (i.e. GAC with the highest mesoporous surface area) decreased the formation of DBPs by 58%. Furthermore, oxidation of GAC increased the surface acidity and negatively impacted the adsorption of halogenated DBP precursors, which suggests basic GACs as promising adsorbents when applying pre-chlorination. In addition, experiments with different NOM showed that pre-chlorination was effective with higher aromatic NOM (i.e. high specific ultraviolet absorbance (SUVA(254))). However, pre-chlorination of NOM with low SUVA(254) has decreased the adsorption of some DBP precursors which resulted in increased formations of haloacetic acid (HAA) and total organic halogen (TOX). Also, experiments with effluent organic matter (EfOM) showed that prechlorination did not increase the adsorption of DBP precursors in low SUVA(254) wastewater effluents. Besides, increasing initial Br- concentration increased the formation of brominated DBPs (Br-DBPs) and the adsorbed Br-DBP precursors. This study gives in-depth understanding of the mechanisms, advantages, and limitations of pre-chlorination as a potential method to control DBPs formation. (c) 2020 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45233]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 推荐引用方式 GB/T 7714 | Erdem, Cagri Utku,Ateia, Mohamed,Liu, Chao,et al. Activated carbon and organic matter characteristics impact the adsorption of DBP precursors when chlorine is added prior to GAC contactors[J]. WATER RESEARCH,2020,184:1-9. |
| APA | Erdem, Cagri Utku,Ateia, Mohamed,Liu, Chao,&Karan, Tanju.(2020).Activated carbon and organic matter characteristics impact the adsorption of DBP precursors when chlorine is added prior to GAC contactors.WATER RESEARCH,184,1-9. |
| MLA | Erdem, Cagri Utku,et al."Activated carbon and organic matter characteristics impact the adsorption of DBP precursors when chlorine is added prior to GAC contactors".WATER RESEARCH 184(2020):1-9. |
入库方式： OAI收割
来源：生态环境研究中心
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