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Position: Home > Articles > Mercury Adsorption and Kinetics in Soil Influenced by NaCl in De-icing Salt Journal of Anhui Agricultural Sciences 2010,38 (25) 13750-13753

NaCl对Hg在土壤中吸附规律及动力学的影响

作  者：
王艳娇;谭红;杨鸿波;舒海霞;聂积;王天;何锦林
单  位：
贵州大学化学工程学院;贵州省理化测试分析研究中心
关键词：
NaCl;Hg2+;吸附;解吸;动力学
摘  要：
通过等温吸附试验和吸附动力学试验,研究了NaCl对贵州万山、石阡、松桃、德江、江口5个地区道路周边混合土壤中Hg2+的吸附解吸行为。结果表明,Hg2+在土壤中的吸附行为由于溶液中加入NaCl而有所差异。在同一浓度NaCl作用下,当Hg2+浓度小于3.00mg/L时,NaCl对Hg2+的吸附有促进作用;当Hg2+浓度大于3.00mg/L时,NaCl对Hg2+的吸附又显示出抑制作用,且随着NaCl浓度的增加抑制作用增强;添加NaCl使Hg2+最大吸附量最多可降低63.64%。解吸率也因NaCl的加入有所改变。0.01mol/LKNO3溶液对Hg2+的解吸率达3.31%～6.78%,而0.01mol/LKNO3+NaCl溶液对Hg2+的解吸率达21.5%～47.3%。吸附动力学试验结果表明,5个动力学方程都拟合得很好,方程的相关系数R2均在0.9以上,只是吸附过程有所不同。NaCl增大了Hg2+在土壤中的流动性,对Hg2+的迁移转化产生很大的影响。
译  名：
Mercury Adsorption and Kinetics in Soil Influenced by NaCl in De-icing Salt
作  者：
WANG Yan-jiao et al (College of Chemical Engineering,Guizhou University,Guiyang,Guizhou 550003)
关键词：
NaCl;Mercury;Adsorption;Desorption;Kinetics
摘  要：
An investigation on the effects of NaCl on adsorption of Hg2+ in Wanshan,Shiqian,Songtao,Dejiang and Jiangkou in Guizhou Province was carried out using isothermal adsorption and kinetic experiment.The results showed that the adsorption behaviour of Hg2+ was different when NaCl was carried into solution.In the mixed soil,NaCl enhanced Hg2+ adsorption obviously when the concentration of Hg2+was lower than 3.00 mg/L.The reduced effect was influenced by different contamination of NaCl.The addition of NaCl made the max adsorption of Hg2+ decreased 63.64%.The desorption rate of Hg2+was changed by the addition of NaCl.The rate of Hg2+ was between 3.31% and 6.78% in 0.01 mol/L KNO3 solution,but it was between 21.5% and 47.3% in 0.01 mol/L KNO3+NaCl solution.The results of kinetic experiment showed that the characteristics of Kinetics equation of mercury adsorption were above 0.9 and the process of adsorption was different.The mobility of mercury was increased by NaCl and it could brought Hg2+ moving.

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