Molecular-level investigations of effective biogenic phosphorus adsorption by a lanthanum/aluminum-hydroxide composite
文献类型：期刊论文
| 作者 | Xu, Rui; Lyu, Tao; Zhang, Meiyi ; Cooper, Mick; Pan, Gang
|
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2020-07-10 |
| 卷号 | 725页码:1-15 |
| ISSN号 | 0048-9697 |
| 关键词 | Eutrophication management Internal loading control Inner-sphere complexes Lake restoration Phosphorus adsorption |
| 英文摘要 | Biogenic phosphorus (P), such as organic P and inorganic pyrophosphates, could substantially contribute towards eutrophication in aquatic systems by internal loading of P from sediment through P species transformation. Previous eutrophication management studies mainly focus on the removal of orthophosphate (Ortho-P), however, an effective approach for biogenic P control from water sources, prior to incorporation in sediment, is still lacking. In this study, a lanthanum/aluminum-hydroxide (LAH) composite was demonstrated to provide both superior removal of Ortho-P and biogenic P, employing myo-inositol hexakisphosphate (IHP) and pyrophosphate (Pyro-P) as model compounds. The maximum IHP and Pyro-P adsorption capacities by LAH attained 36.4 and 21.8 mg P g(-1), respectively. In order to understand the mechanisms of adsorption, zeta potential, P-31 solid-state nuclear magnetic resonance (NMR) spectroscopy and P K-edge X-ray absorption near edge structure (XANES) techniques were used to characterize the LAH after adsorption. The results supported the hypothesis that the interaction between LAH and P species was through surface adsorption, by the formation of innersphere complexes. Linear combination fitting results of XANES data indicated that IHP and Pyro-P preferentially bonded with La-hydroxide in LAH. This study elucidates the adsorption properties and binding mechanisms of IHP and Pyro-P on lanthanum-bearing compounds at the molecular level, indicating that LAH is a promising material for the control of eutrophication. (C) 2020 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44966]  |
| 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, Rui,Lyu, Tao,Zhang, Meiyi,et al. Molecular-level investigations of effective biogenic phosphorus adsorption by a lanthanum/aluminum-hydroxide composite[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,725:1-15. |
| APA | Xu, Rui,Lyu, Tao,Zhang, Meiyi,Cooper, Mick,&Pan, Gang.(2020).Molecular-level investigations of effective biogenic phosphorus adsorption by a lanthanum/aluminum-hydroxide composite.SCIENCE OF THE TOTAL ENVIRONMENT,725,1-15. |
| MLA | Xu, Rui,et al."Molecular-level investigations of effective biogenic phosphorus adsorption by a lanthanum/aluminum-hydroxide composite".SCIENCE OF THE TOTAL ENVIRONMENT 725(2020):1-15. |
入库方式： OAI收割
来源：生态环境研究中心
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