活化硅胶对土壤吸附镍的影响探究

Effect of Activated silica gel on the Nickel Adsorption in Soil

研究了在土壤中加入活化硅胶后对土壤吸附镍的影响。考察了活化硅胶的加入量、溶液中镍离子的初始浓度、p H、离子强度、温度和震荡时间对土壤吸附镍的影响。结果表明,当活化硅胶与土壤的质量比为0.40∶1.25、土壤溶液的p H为7,土壤溶液中镍离子的初始浓度为4 mmol/L,θ为25℃,震荡2 h时,土壤对镍的吸附效果最佳。

This work studied the effect of activated silica gel on adsorption of Ni2＋ in soil. The influencing factors for Ni2＋ adsorption properties in soil were studied including usage of activated silica gel, initial concentration of Ni2＋ ions, pH value, ionic strength, reaction temperature and shock time. The results showed that the best adsorption conditions were that weight ratio of activated silica gel to the soil at 0.40 ： 1.25, pH value at 7, initial concentration of Ni2 ＋ at 4 mmol/L, temperature at 25 ℃ and shock time at 2h.