水资源与水工程学报

文章摘要

胡鹏,祝洪凯,刘春光,孙红文.天津滨海盐碱地区水库沉积物磷释放动力学研究Journal of Water Resources and Water Engineering[J].,2013,24(3):125-129

天津滨海盐碱地区水库沉积物磷释放动力学研究

Research on kinetics of phosphorus release from sediments of reservoir in coastal saline areas of Tianjin

Received:January 29, 2013 Revised:March 13, 2013

DOI：10.11705/j.issn.1672-643X.2013.03.029

中文关键词: 水库沉积物磷释放动力学天津滨海盐碱地区

英文关键词: reservoir sediment phosphorus release kinetics coastal saline areas of Tianjin

基金项目:水利部公益性行业科研专项经费项目(201101060)；国家科技支撑计划项目(2012BAC07B02)

Author Name	Affiliation
HU Peng	MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China [KH*3D]
ZHU Hongkai	MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China [KH*3D]
LIU Chunguang	MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China [KH*3D]
SUN Hongwen	MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China [KH*3D]

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中文摘要:

通过磷释放动力学实验,研究了天津滨海盐碱地区水库15个沉积物的磷释放动力学特征,并探讨了沉积物组成对磷释放的影响。结果表明:0~2h内磷快速解吸,2~12h内磷出现反复吸附、解吸,12~24h内磷的解吸逐渐达到平衡,达最大磷释放量,15个沉积物对于磷的最大解吸量在8.01~12.62mg/kg之间,不同沉积物之间具有较大差异。拟二级动力学模型可以很好地拟合沉积物磷释放动力学特征。沉积物磷释放动力学参数与沉积物全磷、全铁含量呈极显著正相关,与粘粒含量呈显著正相关,而与全盐量呈显著负相关。因此,天津滨海盐碱地区沉积物磷的释放与沉积物磷含量密切相关,并受全铁、全盐量和粘粒含量等因素的共同影响。

英文摘要:

Phosphorus release kinetics characteristics of 15sediments from reservoirs in the coastal saline areas of Tianjin were studied through release kinetic experiments, and the relationship between the sediment composition and their phosphorus release characteristics was investigated. The results indicated that rapid desorption of phosphorus occurred in 0to 2hours, then repeated adsorption and desorption in 2to 12hours and gradually reached equilibrium in 12to 24hours, and the amount of phosphorus desorption reached maximum, which ranged between 8.01and 12.62mg/kg. Phosphorus release kinetics could be better described by pseudo-second order kinetic model. The phosphorus release kinetic characteristics of sediments are related to their composition, and have highly significant positive correlations with the content of total phosphorus and total iron, and have significant positive correlation with the content of clay; while the relationship with the total salt content is significant negative. In conclusion, phosphorus release from sediments in the coastal saline areas of Tianjin is closely related to the content of total phosphorus, and comprehensively affected by the content of total iron, total salt and clay.

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