Characterization of phosphorus leaching from phosphate waste rock in the Xiangxi River watershed, Three Gorges Reservoir, China
文献类型：期刊论文
| 作者 | Jiang, Li-guo1; Liang, Bing1; Xue, Qiang2 ; Yin, Cheng-wei1
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| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2016 |
| 卷号 | 150页码:130-138 |
| 关键词 | Phosphate waste rock Phosphorus release Column leaching experiment Three Gorges Reservoir |
| ISSN号 | 0045-6535 |
| DOI | 10.1016/j.chemosphere.2016.02.008 |
| 英文摘要 | Phosphate mining waste rocks dumped in the Xiangxi River (XXR) bay, which is the largest backwater zone of the Three Gorges Reservoir (TGR), are treated as Type I industry solid wastes by the Chinese government. To evaluate the potential pollution risk of phosphorus leaching from phosphate waste rocks, the phosphorus leaching behaviors of six phosphate waste rock samples with different weathering degrees under both neutral and acidic conditions were investigated using a series of column leaching experiments, following the Method 1314 standard of the US EPA. The results indicate that the phosphorus release mechanism is solubility-controlled. Phosphorus release from waste rocks increases as pH decreases. The phosphorus leaching concentration and cumulative phosphorus released in acidic leaching conditions were found to be one order of magnitude greater than that in neutral leaching conditions. In addition, the phosphorus was released faster during the period when environmental pH turned from weak alkalinity to slight acidity, with this accelerated release period appearing when LAS was in the range of 0.5-2.0 mL/g. In both neutral and acidic conditions, the average values of Total Phosphorus (TP), including orthophosphates, polyphosphates and organic phosphate, leaching concentration exceed the availability by regulatory (0.5 mg/L) in the whole L/S range, suggesting that the phosphate waste rocks stacked within the XXR watershed should be considered as Type II industry solid wastes. Therefore, the phosphate waste rocks deposited within the study area should be considered as phosphorus point pollution sources, which could threaten the adjacent surface-water environment. (C) 2016 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000372765100017 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3863]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Liaoning Tech Univ, Sch Mech & Engn, Fuxing, Liaoning, Peoples R China; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Jiang, Li-guo,Liang, Bing,Xue, Qiang,et al. Characterization of phosphorus leaching from phosphate waste rock in the Xiangxi River watershed, Three Gorges Reservoir, China[J]. CHEMOSPHERE,2016,150:130-138. |
| APA | Jiang, Li-guo,Liang, Bing,Xue, Qiang,&Yin, Cheng-wei.(2016).Characterization of phosphorus leaching from phosphate waste rock in the Xiangxi River watershed, Three Gorges Reservoir, China.CHEMOSPHERE,150,130-138. |
| MLA | Jiang, Li-guo,et al."Characterization of phosphorus leaching from phosphate waste rock in the Xiangxi River watershed, Three Gorges Reservoir, China".CHEMOSPHERE 150(2016):130-138. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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