Phosphorus adsorption on natural sediments: Modeling and effects of pH and sediment composition
文献类型：期刊论文
| 作者 | Zhou, AM; Tang, HX; Wang, DS |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2005 |
| 卷号 | 39期号:7页码:1245-1254 |
| 关键词 | adsorption model sediment NAP preferential sorption species Taihu Lake |
| 英文摘要 | The classic Langmuir isotherm equation was modified to describe phosphorus (P) adsorption on P-polluted sediments. The P adsorption characteristics of six sediment samples from Chinese Taihu Lake were studied by short-term isotherm batch experiments and related to sediment composition. The maximum P adsorption capacities (PAC) and P-binding energy constant (k) were obtained by nonlinearly fitting sorption data using the modified Langmuir isotherm model. Native adsorbed exchangeable phosphorus (NAP), the zero equilibrium P concentration value (EPC0), and partitioning coefficients (K-p) were subsequently calculated by corresponding formulae. K-p and PAC were linearly related to the contents of active Fe and Al in sediments by least squares regression analyses (R-2 approximate to 0.9 for both). The effect of pH in a wide range on adsorption process was investigated and H2PO4- was presumed to be the preferential sorption species in overall sorption process. The fact that the amount of P sorbed and zeta potential of sediment particles have no necessary relationship reveals that a strong contribution to the P binding still comes from a ligand-exchange process on the Me-OH2+ and Me-OH sites rather than electrostatic attraction. In addition, the influence of oxidation-reduction potential (ORP) was investigated and discussed and the dual nature of sediments as a pool or source of P in natural waters was evaluated in site T1-T4. (c) 2005 Elsevier Ltd. All rights reserved. |
| 学科主题 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 研究领域[WOS] | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| WOS记录号 | WOS:000229351400005 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/23300]  |
| 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 | Zhou, AM,Tang, HX,Wang, DS. Phosphorus adsorption on natural sediments: Modeling and effects of pH and sediment composition[J]. WATER RESEARCH,2005,39(7):1245-1254. |
| APA | Zhou, AM,Tang, HX,&Wang, DS.(2005).Phosphorus adsorption on natural sediments: Modeling and effects of pH and sediment composition.WATER RESEARCH,39(7),1245-1254. |
| MLA | Zhou, AM,et al."Phosphorus adsorption on natural sediments: Modeling and effects of pH and sediment composition".WATER RESEARCH 39.7(2005):1245-1254. |
入库方式： OAI收割
来源：生态环境研究中心
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