摘要
以棕壤为供试材料,在其中添加不同比例的腐殖酸后,对汞在棕壤中的吸附-解吸行为产生的影响进行了分析。结果表明,汞在棕壤中的吸附过程包括快反应和慢反应,解吸过程则遵循慢-快-慢的反应历程;当外源汞进入土壤后,很快会被土壤颗粒吸附,而且被吸附的汞很难被解吸;腐殖酸的加入会影响汞在棕壤中的吸附-解吸速率,从而对汞在棕壤中的解吸起抑制作用;腐殖酸对汞在棕壤中的吸附-解吸动力学方程均以Elovich方程的拟合度最高(r=0.9380),其次是双常数方程。
The effect of adsorption and desorption behavior of mercury in brown soil was analyzed by adding different proportions of humic acid in brown soil.The results show that the adsorption process of mercury in brown soil includes fast reaction and slow reaction,and the desorption process follows a slow-fast-slow reaction process.When exogenous mercury enters the soil,it will be adsorbed by soil particles quickly,and the adsorbed mercury is difficult to be desorbed;The addition of humic acid will affect the adsorption-desorption rate of mercury in brown soil,thus inhibiting the desorption of mercury in brown soil;Elovich equation has the highest fit(r=0.9380)in the kinetic equations of humic acid adsorption and desorption of mercury in brown soil,followed by the double constant equation.
作者
李杰颖
LI Jieying(Eco-environment center,Fushun Mining Group Co.,Ltd.,Fushun Liaoning 113008,China)
出处
《农业科技与装备》
2024年第1期8-10,共3页
Agricultural Science & Technology and Equipment
关键词
腐殖酸
汞
棕壤
吸附-解吸
动力学
humic acid
mercury
brown soil
adsorption-desorption
kinetics
作者简介
李杰颖(1976-),女,高级工程师,主要从事环保管理、污染防治方面的研究。
