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Adsorption of phosphate from the Yellow River water by desert particles:Kinetics and equilibrium studies
被引:0
作者:
BeiGang Li XiaoLing BaiQin Ma College of Chemical Environmental ScienceInner Mongolia Normal UniversityHohhotInner Mongolia China
[10022
]
机构:
关键词:
adsorption;
desert particles;
phosphate;
Yellow River;
D O I:
暂无
中图分类号:
X52 [水体污染及其防治];
学科分类号:
0815 ;
摘要:
The equilibrium and kinetic adsorption of phosphate(P) from the Yellow River water onto desert particles taken from the Ulan Buh and Kubuqi deserts were investigated.Effect of the initial concentration of P and particulate matter on the sorption was explored.The kinetic studies show that adsorption rate was faster within the 0-8th hour period,then gradually decreased at 8th-48th hour period and basically tended to a dynamic equilibrium at the 48th hour,but there exists an adsorption difference of P onto different desert particles.The uptake process of P followed the pseudo-second-order rate model and the Morris-Weber diffusion equation which indicates that the adsorption process was mainly controlled by P diffusion inside the particles.The equilibrium investigation obtained an adsorption-desorption equilibrium mass concentration(EPC0) of P from the Yellow River water on desert particles with the range of 0.010-0.042 mg/L,which is higher than present P concentration in the Yellow River.This study indicates that desert particles entering the river might release P to the Yellow River.
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页码:236 / 241
页数:6
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