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题名: EFFECTS OF AIR-DRYING ON PHOSPHORUS SORPTION IN SHALLOW LAKE SEDIMENT, CHINA
作者: Xiao, Wen-Juan1, 2; Song, Chun-Lei1; Cao, Xiu-Yun1; Zhou, Yi-Yong1
通讯作者: Zhou, YY (reprint author), Chinese Acad Sci, Inst Hydrobiol, 7 Donghu S Rd, Wuhan, Hubei Province, Peoples R China.
关键词: Air-drying ; lake sediment ; phosphorus sorption ; organic matter ; alkaline phosphatase activity ; equilibrium phosphorus concentration
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2012
卷: 21, 期:3A, 页:672-678
收录类别: SCI
文章类型: Article
部门归属: [Xiao, Wen-Juan; Song, Chun-Lei; Cao, Xiu-Yun; Zhou, Yi-Yong] Chinese Acad Sci, Inst Hydrobiol, Wuhan, Hubei Province, Peoples R China; [Xiao, Wen-Juan] Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: 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]
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
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.
关键词[WOS]: ORGANIC-MATTER ; RETENTION CAPACITY ; PHOSPHATE SORPTION ; DRIED SEDIMENTS ; SOIL ; RELEASE ; ADSORPTION ; RESERVOIR ; WETLANDS ; DESORPTION
语种: 英语
WOS记录号: WOS:000302887800002
ISSN号: 1018-4619
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16991
Appears in Collections:水环境工程研究中心_期刊论文

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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

Recommended Citation:
Xiao, Wen-Juan; Song, Chun-Lei; Cao, Xiu-Yun; Zhou, Yi-Yong.EFFECTS OF AIR-DRYING ON PHOSPHORUS SORPTION IN SHALLOW LAKE SEDIMENT, CHINA,FRESENIUS ENVIRONMENTAL BULLETIN,2012,21(3A):672-678
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