花生壳粉吸附模拟废水中Cd^(2+)·Pb^(2+)的研究

Research on the Adsorption of Peanut Shell Powder to Cd^(2+) and Pb^(2+) in the Simulation Wastewater

[目的]获得较为理想的花生壳粉作为吸附剂吸附水溶液中Cd2+、Pb2+的吸附条件,为花生壳的综合利用提供基础。[方法]采用花生壳粉为主要原料,对含Cd2+、Pb2+的模拟废水进行了吸附试验。[结果]试验结果表明,pH值、废水中Cd2+及Pb2+的初始浓度、吸附时间等因素均能影响花生壳粉对Cd2+、Pb2+的吸附效果。在Cd2+、Pb2+初始浓度均为30 mg/L、pH值为6、搅拌2 h、花生壳粉的投加量为0.25 g的条件下,Cd2+、Pb2+的去除率分别达到92.2%、90.0%。[结论]花生壳粉对Cd2+、Pb2+的吸附等温线符合Langmuir模式。

[Objective] The condition of the peanut shell powder as adsorbent to adsorb the Cd^2＋ and Pb^2＋ in water solution was researched for the comprehensive utilization of the peanut shell.[Method] The Cd^2＋ and Pb^2＋ in simulation wastewater were absorbed by the peanut shell powder as raw materials.[Results] The results showed that the factors such pH value,the initial concentration of Cd^2＋ and Pb^2＋ in wastewater,adsorption time and other could affect the absorption effect of peanut shell powder.At the initial concentration of Cd^2＋ and Pb^2＋ of 30 mg/L,pH value of 6,stirred for 2 hours,the removal rate of Cd^2＋ and Pb^2＋ was 92.2% and 90.0%,respectively,while the amount of peanut shell powder added was 0.25 g.[Conclusion] The adsorption isotherm pf peanut shell powder to the Cd^2＋ and Pb^2＋ met the Langmuir model.