东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

Characteristics of phosphorus adsorption by sediment mineral matrices with different particle sizes

ISSN号：1672-1683
期刊名称：《南水北调与水利科技》
时间：0
分类：O316[理学—一般力学与力学基础;理学—力学] S155.292[农业科学—土壤学;农业科学—农业基础科学]
作者机构：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China, [2]College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P. R. China, [3]National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing 210098, P. R. China, [4]Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, P R. China, [5]MOE Key Laboratory of Hydrodynamics, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
相关基金：This work was supported by the National Natural Science Foundation of China （Grants No. 51179055, 51239003, and 51125034）, and the Special Fund of State Key Laboratory of China （Grant No. 2010585512）.

作者： Yang XIAO[1,2,3], Xiao-lian ZHU[2], Hao-ke CHENG[2], Kai-jie LI[2], Qi LU[2], Dong-fang LIANG[4,5]

关键词：磷吸附特性, 矿物基质, 沉积物, 中值粒径, LANGMUIR吸附, Elovich方程, 动力学方程, 比表面积, sediment mineral matrix,＂ particle size,＂ specific surface area,＂ pore volume,phosphorus adsorption

中文摘要：

沉积的粒子尺寸是影响磷的主要因素之一沉积上的物理吸附。以便在磷上消除沉积的另外的部件的效果物理吸附沉积矿物质矩阵被把无机的事金属氧化物，和有机物从自然沉积移开获得，它从长江的 Nantong 活动范围是镇定的。结果证明一种指数的关系在中部的粒子尺寸之间存在(D ₅₀) 和特定的表面区域(S _{沉积矿物质矩阵的 g}) ，和好沉积矿物质矩阵样品比粗糙的沉积粒子有一个更大的特定的表面区域和毛孔体积。运动方程被用来描述沉积矿物质矩阵的磷吸附过程，包括 Elovich 方程，伪一阶的吸附运动方程，和 quasi-second-order 吸附运动方程。结果证明运动方程有最好适合的 quasi-second-order 吸附完成。用集体保存和兰米尔吸附运动方程，一个公式被推出计算沉积矿物质矩阵的平衡吸附能力。这研究的结果证明磷吸附能力随显示特定的表面区域和毛孔体积是在决定沉积矿物质矩阵的磷吸附能力的主要因素的 D ₅₀, 的增加减少。这研究将帮助在水的环境在磷的转变理解沉积的重要角色。

英文摘要：

The particle size of sediment is one of the main factors that influence the phosphorus physical adsorption on sediment. In order to eliminate the effect of other components of sediment on the phosphorus physical adsorption, the sediment mineral matrices were obtained by removing inorganic matter, metal oxides, and organic matter from natural sediments, which were collected from the Nantong reach of the Yangtze River. The results show that an exponential relationship exists between the median particle size （Ds0） and specific surface area （Sg） of the sediment mineral matrices, and the fine sediment mineral matrix sample has a larger specific surface area and pore volume than the coarse sediment particles. The kinetic equations were used to describe the phosphorus adsorption process of the sediment mineral matrices, including the Elovich equation, quasi-first-order adsorption kinetic equation, and quasi-second-order adsorption kinetic equation. The results show that the quasi-second-order adsorption kinetic equation has the best fitting effect. Using the mass conservation and Langmuir adsorption kinetic equations, a formula was deduced to calculate the equilibrium adsorption capacity of the sediment mineral matrices. The results of this study show that the phosphorus adsorption capacity decreases with the increase of Ds0, indicating that the specific surface area and pore volume are the main factors in determining the phosphorus adsorption capacity of the sediment mineral matrices. This study will help understand the important role of sediment in the transformation of phosphorus in aquatic environments.

同期刊论文项目