湘中典型矿区土壤对锑的吸附特征

[目的]研究矿区土壤对重金属锑的吸附行为。[方法]采取动态吸附的方法,通过改变污染物浓度、p H、吸附时间、温度等条件,研究矿区土壤对重金属锑的吸附特征。[结果]矿区土壤对重金属锑的吸附可以用Langmuir方程、Freundlich方程、Temkin方程进行较好地拟合,其中Langmuir方程的描述效果最优。不同温度试验中,矿区土壤对锑的吸附量的影响从大到小依次为35、25、15℃。随p H的升高,矿区土壤对重金属锑的吸附量逐渐递减。与双常数速率方程相比,Elovich方程更适合描述矿区土壤的动力学吸附过程。[结论]该研究可为预防和治理污染土壤提供科学依据。

Adsorption Characteristics of Antimony in Typical Mining Areas Soils of Hunan Province

[Objective]In order to study the adsorption behavior of mine soil on heavy metal antimony.[Method]Using the dynamic adsorption method to obtain the adsorption characteristics of heavy metals in the mine soil by changing the pollutant concentration,pH value,adsorption time,temperature and other conditions.[Result] The results showed the the adsorption of heavy metal antimony in mine soil can be well fitted by Langmuir equation,Freundlich equation and Temkin equation,in which the Langmuir equation was the best.In the three groups of different temperature control experiments,the adsorption capacity increased with the rise of temperature.In the experimental range,with the increase of pH value,the adsorption capacity of heavy metals antimony in the mine soil was gradually decreased.The Elovich equation was more suitable to describe the dynamic adsorption process.[Conclusion]This study can provide scientific basis for prevention and treatment of contaminated soil.