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紫色土泥沙沉积物对磷的吸附-解吸动力学特征
Alternative TitleCharacteristics of Phosphorus Adsorption and Desorption Kinetics of Sediments from Purple Soils
王振华1,2,3; 朱波1; 何敏1; 周明华1,3; 王彦1
2011
Source Publication农业环境科学学报
ISSN1672-2043
Volume7Issue:3Pages:154-160
SubtypeArticle
Contribution Rank1
Abstract在紫色土集中分布的四川盆地丘陵区,选择不同土地利用方式(林地,水田,旱坡地,村镇)产生的沟渠泥沙为实验材料,采用平衡法研究了紫色土泥沙沉积物对磷的吸附-解吸动力学特征.结果表明,泥沙对磷的吸附和解吸过程按速率均分为快,慢,动态平衡3个阶段,0~0.75h内泥沙对磷的吸附速率与活性铁铝氧化物含量和粘粒含量之间呈显著正相关,较高的Olsen P水平和砂粒含量是泥沙磷解吸速率高的重要因素.泥沙磷的吸附量和解吸量与反应时间之间均呈幂函数关系(Qt=k·ta,0
Other AbstractDitch sediments were respectively collected from forest, paddy field, dry cropland and residential area in a typical agricultural catchment, where locates in hilly area of purple soil in the central Sichuan Basin. The characteristics of phosphorus(P) adsorption-desorption kinetics of the ditch sediments were studied by the batch equilibrium technique. The P was adsorbed and desorbed on the sediments at different rates. According to the rate, the reaction process of adsorbing-desorbing could be divided into three steps, namely fast, slow and dynamic equilibrium reaction. The rate of phosphorus adsorbing on the sediments in the first 0.75 h was significantly and positively correlated with the content of active iron and aluminum oxides and clay fractions. The high rate of phosphorus desorbing on the sediments could be attributed to the high content of Olsen P and sand particle-size fractions. The amounts of P adsorbed and desorbed from the sediments featured a power function with the reaction time(Qt = k·ta,0 < a < 1).The P sorption amount of the sediments was highly and positively correlated with the content of active iron and aluminum oxides. The desorption amount of the sediments was significantly and positively correlated with the content of sand particle-size fractions, but it was significantly and negatively correlated with the content of fine particle-size fractions. The P desorption amount of the sediments from the residential area was significantly higher than that of the sediments from the other fields/areas. The results of this research provide a scientific basis for the risk assessment of P release from the sediments derived from purple soils in hilly area of central Sichuan Basin
Keyword 沟渠泥沙 吸附-解吸 动力学 紫色土
Indexed ByCSCD
Language中文
CSCD IDCSCD:4117580
Citation statistics
Cited Times:16[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26031
Collection山地表生过程与生态调控重点实验室
Corresponding Author王振华
Affiliation1.中国科学院成都山地灾害与环境研究所;
2.长江科学院流域水环境研究所;
3.中国科学院研究生院
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
王振华,朱波,何敏,等. 紫色土泥沙沉积物对磷的吸附-解吸动力学特征[J]. 农业环境科学学报,2011,7(3):154-160.
APA 王振华,朱波,何敏,周明华,&王彦.(2011).紫色土泥沙沉积物对磷的吸附-解吸动力学特征.农业环境科学学报,7(3),154-160.
MLA 王振华,et al."紫色土泥沙沉积物对磷的吸附-解吸动力学特征".农业环境科学学报 7.3(2011):154-160.
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