Phosphorus retention capacity of agricultural headwater ditch sediments under alkaline condition in purple soils area, China
文献类型：期刊论文
| 作者 | Luo Zhuan-xi1,2,3; Zhu Bo1 ; Tang Jia-liang1; Wang Tao1
|
| 刊名 | ECOLOGICAL ENGINEERING
 |
| 出版日期 | 2009-01-08 |
| 卷号 | 35期号:1页码:57-64 |
| ISSN号 | 0925-8574 |
| 关键词 | Adsorption Retention Alkaline Headwater ditch Phosphorus |
| 通讯作者 | Zhu Bo |
| 合作状况 | 其它 |
| 英文摘要 | Phosphorus (P) retention by headwater ditch sediments adsorption plays a pivotal ecological role in P buffering in freshwater ecosystems. Previous studies focused on headwater ditch sediment adsorption and its P retention capacity in acid conditions, but little information is available for headwater ditches under alkaline condition. In this study, adsorption behavior of phosphorus was investigated in headwater ditch sediments under alkaline condition using a batch equilibrium technique, thus determining phosphorus retention capacity of headwater ditch sediments collected at 11 sites at base-flow on 2 March 2006 in purple soils area of China. Results showed that headwater ditch sediments had elevated phosphorus sorption maximum (S-max) values (122.72-293.23 mg P kg(-1)) and P binding energy (K) values (1.64-8.65 L mg(-1)), while they had low equilibrium phosphorus concentration (EPC0) (0.001-0.108 mg L-1) and degree of phosphorus saturation (DSP) (1.93-10.19%). Analysis of EPC0 and soluble P concentration indicated that sediments acted as a sink for P across all headwater ditches. Therefore, there were high intrinsic P retention capacities of headwater ditch sediments. Positive correlations of both K and S-max with oxalate-extractable Fe (r of 0.93 and 0.81, p < 0.05) and total carbon (TC) (r of 0.89 and 0.74, p < 0.05) were found, thus suggesting that organic matter and amorphous or poorly crystalline Fe would play dominant roles in P adsorption in the headwater ditch sediments under alkaline condition. Since neither S-max nor K were correlated with CCE (CaCO3) (r of 0.15 and -0.06, p > 0.05), the high-energy sorptive surfaces of Fe oxides were more important than CaCO3 in P sorption of sediment under alkaline condition. At the same time, these poor correlations between CCE and K and S-max imply a non-linear relationship between P retention and the content of carbonate. The negative correlations of both K and S-max with pH (r of-0.73, and-0.58, p < 0.05) revealed that an increase in pH would not improve sediment retention capacity under alkaline conditions. (C) 2008 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Technology |
| 类目[WOS] | Ecology ; Engineering, Environmental ; Environmental Sciences |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Engineering |
| 关键词[WOS] | PHOSPHATE SORPTION ; WATER ; DYNAMICS ; RELEASE ; STREAM ; PH ; SOLUBILITY ; DESORPTION ; DRAINAGE ; WETLANDS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000262812700006 |
| 公开日期 | 2010-10-19 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/2238]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Urban Environm, Xiamen 361003, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo Zhuan-xi,Zhu Bo,Tang Jia-liang,et al. Phosphorus retention capacity of agricultural headwater ditch sediments under alkaline condition in purple soils area, China[J]. ECOLOGICAL ENGINEERING,2009,35(1):57-64. |
| APA | Luo Zhuan-xi,Zhu Bo,Tang Jia-liang,&Wang Tao.(2009).Phosphorus retention capacity of agricultural headwater ditch sediments under alkaline condition in purple soils area, China.ECOLOGICAL ENGINEERING,35(1),57-64. |
| MLA | Luo Zhuan-xi,et al."Phosphorus retention capacity of agricultural headwater ditch sediments under alkaline condition in purple soils area, China".ECOLOGICAL ENGINEERING 35.1(2009):57-64. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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