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三峡库区消落区表层沉积物磷吸附特征

曹琳,  吉芳英,  林茂,  黎司,  王图锦

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文章导航 > 水科学进展  > 2011 >  22(1): 89-96
曹琳, 吉芳英, 林茂, 黎司, 王图锦. 三峡库区消落区表层沉积物磷吸附特征[J]. 水科学进展, 2011, 22(1): 89-96.
引用本文: 曹琳, 吉芳英, 林茂, 黎司, 王图锦. 三峡库区消落区表层沉积物磷吸附特征[J]. 水科学进展, 2011, 22(1): 89-96.
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CAO Lin, JI Fang-ying, LIN Mao, LI Si, WANG Tu-jin. Phosphorous adsorption characteristics of upper layer sediments in the water level fluctuating zone of Three Gorges Reservoir area[J]. Advances in Water Science, 2011, 22(1): 89-96.
Citation: CAO Lin, JI Fang-ying, LIN Mao, LI Si, WANG Tu-jin. Phosphorous adsorption characteristics of upper layer sediments in the water level fluctuating zone of Three Gorges Reservoir area[J]. Advances in Water Science, 2011, 22(1): 89-96.
shu

三峡库区消落区表层沉积物磷吸附特征

  • 重庆大学三峡库区生态环境教育部重点实验室, 重庆, 400045

基金项目: 科学技术部中德三峡库区水环境污染过程控制与安全保障技术研究合作资助项目(2007DFA90660);教育部科技创新工程重大项目培育资金资助项目(708071)
详细信息
    作者简介:

    曹琳(1984- ),女,重庆人,博士研究生,主要从事水污染控制研究.E-mail:sweetiecl@163.com

  • 中图分类号: X131

Phosphorous adsorption characteristics of upper layer sediments in the water level fluctuating zone of Three Gorges Reservoir area

  • Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, Chongqing University, Chongqing 400045, China

  • 摘要: 以三峡库区消落区表层沉积物为研究对象,通过对干湿交替沉积物中磷的赋存形式、吸附等温曲线的分析,揭示了干湿交替过程中沉积物磷的分布规律、吸附特征以及磷的源汇变化。结果表明:上覆水总磷变化呈现11月总磷<5月总磷<8月总磷。消落区覆水到出露沉积物最大磷吸附量、土壤最大缓冲能力在增加,磷零吸持平衡浓度、易解吸磷在降低,表明沉积物在夏季出露落干的过程中,固磷能力增强,释磷能力减弱;消落区土壤首次覆水过程中土壤磷呈现出由源到汇的转变。成库初期,覆水时沉积物主要表现为磷的积累,次年水库开闸放水排沙时,消落区表层富磷沉积物被冲刷排出。
    Abstract: The upper layer sediment in the water level fluctuating zone of Three Gorges Reservoir area (TGRA)is studied through an analysis of phosphorous forms and adsorption isotherm curves in the fluctuating zone with wet-drycycles.The result shows that the total phosphorous (TP)content for August would be higher than of May in the over-lying water,while the lowest value is found in November.The max adsorption quantity of phosphorus and the max buffer capacity of soil of sediments increase while their equilibrium phosphorus concentration and reactive desorbed phosphorus drop when sediments alternated from the submerged state to the exposed state,which indicates that phos-phorous fixing strengthens whereas phosphorous releasing weakens in the exposed sediments in summer.Moreover,in the course of being submerged for the first time,sediments phosphorous show an alternation from a source to a sink. During the initial stage of impoundment of Three Gorges Reservoir,phosphorous is being accumulated in the sediment.This phosphorous-enriched upper sediment layer in the water level fluctuating zone will be washed away with reservoir sluicing in the following year.
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  • 收稿日期:  2010-03-03
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三峡库区消落区表层沉积物磷吸附特征

  • 重庆大学三峡库区生态环境教育部重点实验室, 重庆, 400045
    • 基金项目:  科学技术部中德三峡库区水环境污染过程控制与安全保障技术研究合作资助项目(2007DFA90660);教育部科技创新工程重大项目培育资金资助项目(708071)
    作者简介:

    曹琳(1984- ),女,重庆人,博士研究生,主要从事水污染控制研究.E-mail:sweetiecl@163.com

  • 收稿日期: 2010-03-03
  • 刊出日期: 2011-01-25

  • 中图分类号: X131

摘要: 以三峡库区消落区表层沉积物为研究对象,通过对干湿交替沉积物中磷的赋存形式、吸附等温曲线的分析,揭示了干湿交替过程中沉积物磷的分布规律、吸附特征以及磷的源汇变化。结果表明:上覆水总磷变化呈现11月总磷<5月总磷<8月总磷。消落区覆水到出露沉积物最大磷吸附量、土壤最大缓冲能力在增加,磷零吸持平衡浓度、易解吸磷在降低,表明沉积物在夏季出露落干的过程中,固磷能力增强,释磷能力减弱;消落区土壤首次覆水过程中土壤磷呈现出由源到汇的转变。成库初期,覆水时沉积物主要表现为磷的积累,次年水库开闸放水排沙时,消落区表层富磷沉积物被冲刷排出。

English Abstract

曹琳, 吉芳英, 林茂, 黎司, 王图锦. 三峡库区消落区表层沉积物磷吸附特征[J]. 水科学进展, 2011, 22(1): 89-96.
引用本文: 曹琳, 吉芳英, 林茂, 黎司, 王图锦. 三峡库区消落区表层沉积物磷吸附特征[J]. 水科学进展, 2011, 22(1): 89-96.
shu
CAO Lin, JI Fang-ying, LIN Mao, LI Si, WANG Tu-jin. Phosphorous adsorption characteristics of upper layer sediments in the water level fluctuating zone of Three Gorges Reservoir area[J]. Advances in Water Science, 2011, 22(1): 89-96.
Citation: CAO Lin, JI Fang-ying, LIN Mao, LI Si, WANG Tu-jin. Phosphorous adsorption characteristics of upper layer sediments in the water level fluctuating zone of Three Gorges Reservoir area[J]. Advances in Water Science, 2011, 22(1): 89-96.
shu

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