Enhanced removal of natural organic matters by calcined Mg/Al layered double hydroxide nanocrystalline particles: Adsorption, reusability and mechanism studies
文献类型：期刊论文
| 作者 | Xu, Cuihong; Hou, Jingwei; Fang, Liping; Wang, Yaru; Li, Ji; Xiao, Feng ; Wang, Dongsheng
|
| 刊名 | APPLIED SURFACE SCIENCE
 |
| 出版日期 | 2018-06-01 |
| 卷号 | 442页码:45-53 |
| 关键词 | Anionic clays Adsorption process Molecular weight distribution Natural organic matters (NOMs) |
| ISSN号 | 0169-4332 |
| 文献子类 | Article |
| 英文摘要 | Natural organic matters (NOMs) can generate disinfection by-products during water treatment process, threatening to human health. However, the removal of NOM is still unsatisfactory in water treatment. Hence, this work investigated the removal efficiency of humic and fulvic acids (HA and FA) by layered double hydroxide (LDH) and its calcined forms under different conditions. Our results show that calcination of LDH at 500 degrees C can effectively enhance the NOM removal with adsorption capacities of 98.8 mg/g for HA and 97.6 mg/g for FA at pH 9.5. The removal efficiency of HA and FA notably increases by decreasing pH. The presence of SO42 and CO32- significantly suppresses the removal of HA or FA by CLDHs. The release of Al from LDH and CLDH is negligible and safe to aquatic organisms at pH > 6.5. Moreover, CLDH shows a good reusability for NOM removal in water treatment. The removal of HA and FA by CLDH is governed through electrostatic interactions and intercalation into the interlayers of LDH was not observed. Fluorescence and molecular weight analyses show that the microbial by-products with mid-molecular weight are more difficult to be removed than HA and FA. This study provides a new insight into the NOM removal using LDH and CLDH. (C) 2018 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41137]  |
| 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 | Xu, Cuihong,Hou, Jingwei,Fang, Liping,et al. Enhanced removal of natural organic matters by calcined Mg/Al layered double hydroxide nanocrystalline particles: Adsorption, reusability and mechanism studies[J]. APPLIED SURFACE SCIENCE,2018,442:45-53. |
| APA | Xu, Cuihong.,Hou, Jingwei.,Fang, Liping.,Wang, Yaru.,Li, Ji.,...&Wang, Dongsheng.(2018).Enhanced removal of natural organic matters by calcined Mg/Al layered double hydroxide nanocrystalline particles: Adsorption, reusability and mechanism studies.APPLIED SURFACE SCIENCE,442,45-53. |
| MLA | Xu, Cuihong,et al."Enhanced removal of natural organic matters by calcined Mg/Al layered double hydroxide nanocrystalline particles: Adsorption, reusability and mechanism studies".APPLIED SURFACE SCIENCE 442(2018):45-53. |
入库方式： OAI收割
来源：生态环境研究中心
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