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Effective control of modified palygorskite to NH4+-N release from sediment

文献类型：期刊论文

作者Chen, Lei1; Zheng, Tianyuan2; Zhang, Junjie1; Liu, Jie3; Zheng, Xilai1
刊名ENVIRONMENTAL TECHNOLOGY
出版日期2014-01-02
卷号35期号:1页码:60-69
关键词sediment capping modified palygorskite NH (+)(4)-N release control
英文摘要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.
WOS标题词Science & Technology ; Life Sciences & Biomedicine
类目[WOS]Environmental Sciences
研究领域[WOS]Environmental Sciences & Ecology
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记录号WOS:000328108700008
公开日期2015-12-24
源URL[http://ir.qibebt.ac.cn/handle/337004/6268]  
专题青岛生物能源与过程研究所_技术转移部中试技术服务中心
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.

入库方式： OAI收割

来源：青岛生物能源与过程研究所

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