| Effective control of modified palygorskite to NH4+-N release from sediment | |
Chen, Lei1 ; Zheng, Tianyuan2; Zhang, Junjie1; Liu, Jie3; Zheng, Xilai1
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| 2014-01-02 | |
| 发表期刊 | ENVIRONMENTAL TECHNOLOGY
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| 卷号 | 35期号:1页码:60-69 |
| 摘要 | Sediment capping is an in situ treatment technology that can effectively restrain nutrient and pollutant release from the sediment in lakes and reservoirs. Research on sediment capping has focused on the search for effective, non-polluting and affordable capping materials. The efficiency and mechanism of sediment capping with modified palygorskite in preventing sediment ammonia nitrogen (NH (+)(4)-N) release to surface water were investigated through a series of batch and sediment capping experiments. Purified palygorskite and different types of modified palygorskite (i.e. heated, acid-modified and NaCl-modified palygorskite) were used in this investigation. Factors affecting control efficiency, including the temperature, thickness and grain size of the capping layer, were also analysed. The batch tests showed that the adsorption of NH (+)(4)-N on modified palygorskite achieved an equilibration in the initial 45min, and the adsorption isotherm followed the Freundlich equation. Sediment capping experiments showed that compared with non-capped condition, covering the sediment with modified palygorskite and sand both inhibited NH (+)(4)-N release to the overlying water. Given its excellent chemical stability and strong adsorption, heated palygorskite, which has a NH (+)(4)-N release inhibition ratio of 41.3%, is a more effective sediment capping material compared with sand. The controlling effectiveness of the modified palygorskite increases with thicker capping layer, lower temperature and smaller grain size of the capping material. |
| 文章类型 | Article |
| 关键词 | Sediment Capping Modified Palygorskite Nh (+)(4)-n Release Control |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| DOI | 10.1080/09593330.2013.808268 |
| 关键词[WOS] | ACTIVE BARRIER SYSTEMS ; REDUCE PHOSPHORUS RELEASE ; AQUEOUS-SOLUTION ; CONTAMINATED SEDIMENTS ; NA-ATTAPULGITE ; SORPTION ; REMOVAL ; ADSORPTION ; ACID ; LAKE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:000328108700008 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qibebt.ac.cn/handle/337004/6268 |
| 专题 | 中试技术服务中心 |
| 作者单位 | 1.Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Shandong, Peoples R China 2.Univ Stuttgart, Inst Water, D-70569 Stuttgart, Germany 3.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266100, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Lei,Zheng, Tianyuan,Zhang, Junjie,et al. Effective control of modified palygorskite to NH4+-N release from sediment[J]. ENVIRONMENTAL TECHNOLOGY,2014,35(1):60-69. |
| APA | Chen, Lei,Zheng, Tianyuan,Zhang, Junjie,Liu, Jie,&Zheng, Xilai.(2014).Effective control of modified palygorskite to NH4+-N release from sediment.ENVIRONMENTAL TECHNOLOGY,35(1),60-69. |
| MLA | Chen, Lei,et al."Effective control of modified palygorskite to NH4+-N release from sediment".ENVIRONMENTAL TECHNOLOGY 35.1(2014):60-69. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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