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EFFECTS OF AIR-DRYING ON PHOSPHORUS SORPTION IN SHALLOW LAKE SEDIMENT, CHINA

文献类型：期刊论文

作者Xiao, Wen-Juan1,2; Song, Chun-Lei1; Cao, Xiu-Yun1; Zhou, Yi-Yong1
刊名FRESENIUS ENVIRONMENTAL BULLETIN
出版日期2012
卷号21期号:3A页码:672-678
关键词Air-drying lake sediment phosphorus sorption organic matter alkaline phosphatase activity equilibrium phosphorus concentration
ISSN号1018-4619
通讯作者Zhou, YY (reprint author), Chinese Acad Sci, Inst Hydrobiol, 7 Donghu S Rd, Wuhan, Hubei Province, Peoples R China.
中文摘要Air-drying has significant influences on phosphorus sorption behaviors in soils. It is urgently necessary to expend the relevant knowledge to sediments of lakes, especially large eutrophic ones. Sediments were collected at different sites in a Chinese large shallow eutrophic lake (Lake Chaohu) and an urban shallow lake (Lake Donghu) in November 2007; contents of organic matter (OM) were measured. Phosphorus sorption behavior fitted Langmuir equation well. Compared to the field-moist sample, the air-dried sediments had significantly lower sorption energy (K). Additionally, there was a significant positive relationship between the OM content and K value in the field-moist sediments. The changes in geochemical characteristics of iron oxide and organic carbon may be mainly responsible for the decreasing K value in air-dried sediment. Furthermore, in the incubation experiments, the air-dried sediments generally gave higher concentrations of soluble reactive phosphorus coupled with alkaline phosphatase activity, which was mainly due to the decreased phosphorus sorption energy, because there was no significant differences of pH values and dissolved oxygen concentrations between the air-dried and field-moist sediments. Finally, in contrast with the field-moist samples, the air-dried ones showed a significantly positive relationship between OM content and EPC0 value, suggesting that the breakdown of OM during drying may be a major source of P upon reflooding.
英文摘要Air-drying has significant influences on phosphorus sorption behaviors in soils. It is urgently necessary to expend the relevant knowledge to sediments of lakes, especially large eutrophic ones. Sediments were collected at different sites in a Chinese large shallow eutrophic lake (Lake Chaohu) and an urban shallow lake (Lake Donghu) in November 2007; contents of organic matter (OM) were measured. Phosphorus sorption behavior fitted Langmuir equation well. Compared to the field-moist sample, the air-dried sediments had significantly lower sorption energy (K). Additionally, there was a significant positive relationship between the OM content and K value in the field-moist sediments. The changes in geochemical characteristics of iron oxide and organic carbon may be mainly responsible for the decreasing K value in air-dried sediment. Furthermore, in the incubation experiments, the air-dried sediments generally gave higher concentrations of soluble reactive phosphorus coupled with alkaline phosphatase activity, which was mainly due to the decreased phosphorus sorption energy, because there was no significant differences of pH values and dissolved oxygen concentrations between the air-dried and field-moist sediments. Finally, in contrast with the field-moist samples, the air-dried ones showed a significantly positive relationship between OM content and EPC0 value, suggesting that the breakdown of OM during drying may be a major source of P upon reflooding.
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]ORGANIC-MATTER ; RETENTION CAPACITY ; PHOSPHATE SORPTION ; DRIED SEDIMENTS ; SOIL ; RELEASE ; ADSORPTION ; RESERVOIR ; WETLANDS ; DESORPTION
收录类别SCI
资助信息State Major Project of Water Pollution Control and Management[2008ZX07101-013]; National Key Basic Research and development Program[2008CB418006]; National Science Foundation of China[41073066]; State Key Laboratory of Freshwater Ecology and Biotechnology[2011FBZ15]
语种英语
WOS记录号WOS:000302887800002
公开日期2012-09-25
源URL[http://ir.ihb.ac.cn/handle/342005/16991]  
专题水生生物研究所_水环境工程研究中心_期刊论文
作者单位1.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Hubei Province, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Xiao, Wen-Juan,Song, Chun-Lei,Cao, Xiu-Yun,et al. EFFECTS OF AIR-DRYING ON PHOSPHORUS SORPTION IN SHALLOW LAKE SEDIMENT, CHINA[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2012,21(3A):672-678.
APA Xiao, Wen-Juan,Song, Chun-Lei,Cao, Xiu-Yun,&Zhou, Yi-Yong.(2012).EFFECTS OF AIR-DRYING ON PHOSPHORUS SORPTION IN SHALLOW LAKE SEDIMENT, CHINA.FRESENIUS ENVIRONMENTAL BULLETIN,21(3A),672-678.
MLA Xiao, Wen-Juan,et al."EFFECTS OF AIR-DRYING ON PHOSPHORUS SORPTION IN SHALLOW LAKE SEDIMENT, CHINA".FRESENIUS ENVIRONMENTAL BULLETIN 21.3A(2012):672-678.

入库方式： OAI收割

来源：水生生物研究所

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