Pb^(2+)、Ni^(2+)在核桃壳上的竞争吸附研究

Competitive Adsorption of Pb^(2+) and Ni^(2+) to Walnut Shell

以核桃壳为吸附剂研究Pb2+、Ni2+在吸附剂上的动力学方程、吸附等温线及竞争吸附行为。研究表明,Pb2+、Ni2+在吸附剂上的吸附均满足拟二阶动力学方程,线性相关系数均高达0.99;Pb2+、Ni2+吸附平衡浓度满足Langmuir吸附等温方程。Pb2+、Ni2+竞争吸附表明吸附剂对Pb2+的吸附能力比Ni2+强。

The sorption kinetics model, adsorption isotherm and competitive adsorption of Pb2＋ and Ni2＋ metallic ions by walnut shell were studied. Results showed that the sorption kinetics of Pb2＋, Ni2＋ onto walnut shell followed pseudo second order kinetic model with regression coefficient of 0.99, and the equilibrium concentration of adsorption fit well with Langmuir equation. The competitive adsorption test indicated that the sorption capacity of walnut shell to Pb2＋ was higher than Ni2＋.