Investigating the effect of hardness cations on coagulation: The aspect of neutralisation through Al(III)-dissolved organic matter (DOM) binding
文献类型：期刊论文
| 作者 | Wang, Dongsheng; Zhou, Yuxuan; Yan, Mingquan; Liu, Ruiping; Qu, Jiuhui |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2017-05-15 |
| 卷号 | 115期号:0页码:22-28 |
| 关键词 | Aluminum Coagulation Differential Absorbance Spectra Dissolved Organic Matter Hardness Cation Neutralisation |
| 英文摘要 | Hardness cations are ubiquitous and abundant in source water, while the effect of hardness on the performance of coagulation for dissolved organic matter (DOM) removal in water treatment remains unclear due to the limitation of methods that can characterise the subtle interactions between DOM, coagulant and hardness cations. This work quantified the competition between coagulant Al3+ and hardness cations to bind onto DOM using absorbance spectroscopy acquired at different Al3+ concentrations in the absence and presence of Ca2+ or Mg2+. The results indicate that, in the presence of either Mg2+ or Ca2+, an increasing depression of the binding of Al3+-DOM could be observed in the differential spectra of DOM with the increasing of Mg2+ or Ca2+ at a level of 10, 100 and 1000 mu M, with the observation being more significant at higher pH from 6.5 to 8.5. The results of zeta potentials of DOM indicate that the competition of hardness cations results in the negative DOM being less efficiently neutralised by Al3+. This study demonstrates that the removal of DOM by coagulation would significantly deteriorate with the presence of hardness cations, which would compete with coagulant Al3+ to neutralise the unsaturated sites in DOM. (C) 2017 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39519]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Dongsheng,Zhou, Yuxuan,Yan, Mingquan,et al. Investigating the effect of hardness cations on coagulation: The aspect of neutralisation through Al(III)-dissolved organic matter (DOM) binding[J]. WATER RESEARCH,2017,115(0):22-28. |
| APA | Wang, Dongsheng,Zhou, Yuxuan,Yan, Mingquan,Liu, Ruiping,&Qu, Jiuhui.(2017).Investigating the effect of hardness cations on coagulation: The aspect of neutralisation through Al(III)-dissolved organic matter (DOM) binding.WATER RESEARCH,115(0),22-28. |
| MLA | Wang, Dongsheng,et al."Investigating the effect of hardness cations on coagulation: The aspect of neutralisation through Al(III)-dissolved organic matter (DOM) binding".WATER RESEARCH 115.0(2017):22-28. |
入库方式： OAI收割
来源：生态环境研究中心
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