文献类型：期刊文献

中文题名：杭州湾典型潮滩湿地植物带沉积物磷吸附特征

英文题名：Adsorption Characteristics of Phosphate on Sediment Under Typical Vegetation Types in Hangzhou Bay

作者：邵学新[1,2] 梁威[1] 王蒙[1] 吴明[1] 叶小齐[1] 蒋科毅[1]

第一作者：邵学新

机构：[1]中国林业科学研究院亚热带林业研究所,国家林业局杭州湾湿地生态系统定位观测研究站;[2]浙江大学环境保护研究所

年份：2014

卷号：46

期号：6

起止页码：1032-1038

中文期刊名：土壤

外文期刊名：Soils

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金项目(31000296);"十二五"国家科技支撑计划专题项目(2012BAC13B02-2);国家林业公益性行业科研专项(201404210)资助

语种：中文

中文关键词：杭州湾;等温吸附;吸附动力学;植物

外文关键词：Hangzhou Bay; Adsorption kinetics; Adsorption isotherms; Vegetation type

分类号：X142

摘要：利用磷酸盐吸附动力学和等温吸附实验,研究了杭州湾潮滩湿地沉积物磷素吸附特征,并分析了不同植被类型及其沉积物理化性质对磷吸附的影响。结果表明,不同沉积物磷的吸附与释放过程均包括快速吸附（0-1 h）、慢速吸附（1-16 h）和平衡（16-72 h）3个阶段,不同植物没有明显影响这一趋势。改进的Langmuir模型拟合表明,沉积物最大吸附容量（Qmax）在154.5-436.2 mg/kg间,生长植物的沉积物Qmax明显高于光滩沉积物。沉积物自带可解吸磷（NAP）较少,在1.853-4.777 mg/kg间,NAP在不同类型沉积物的分布趋势与Qmax值相似。4种植被类型沉积物EPC0值低于潮汐水体中磷酸盐浓度,扮演着＂汇＂的角色,EPC0在不同沉积物间差异较小。相关性分析显示,杭州湾潮滩沉积物Qmax和NAP受有机质、颗粒组成和总无机磷含量影响,其中Qmax还受电导率影响,而研究区EPC0与沉积物理化性质不存在显著相关性。植物可以通过影响沉积物的物理化学参数,从而影响磷的吸附过程。
Phosphate adsorption kinetics and isotherms on sediments under different vegetation types in Hangzhou Bay wetland were studied, and the influences of the sediment physicochemical properties on phosphorus sorption characteristics were analyzed. The results showed that there are three stages during sediment adsorption process with rapid adsorption（0–1 h）, slow adsorption（1–16 h） and balance（16–72 h）. The trend was not affected significantly by different plants. Indexes fitted from improved Langmuir model showed that sediment Qmax was between 154.5–436.2 mg/kg, and was significantly higher in sediment with plant growth than that of bare mudflat. Sediment NAP was between 1.853–4.777 mg/kg, indicating a low native adsorbed exchangeable phosphorus. NAP trends between different types of sediments were similar to that of Qmax values. Sediments EPC0 under different vegetation types were lower than soluble reactive phosphorus concentration in the overlying water. So the sediment acts as the ＂sink＂ of phosphorus from tidal water. The variation of EPC0 between different sediments was minor. Correlation analysis showed that the sediment Qmax and NAP in Hangzhou Bay wetland were affected by organic matter, particle composition and total inorganic phosphorus concentration, and Qmax was also affected by the electrical conductivity value. However, there are no significant correlations between sediments EPC0 and physicochemical properties. In conclusion of that, plants can affect the physical and chemical parameters of sediments, thus can affect the adsorption kinetics and isotherms of phosphorus.