风化煤对水中重金属离子的吸附

以甘肃景泰风化煤作吸附剂,常温下对水溶液Pb2+、Cu2+、Zn2+进行了吸附实验研究,探讨了吸附动力学、吸附平衡、介质酸度的影响及吸附机理。结果表明,风化煤对几种重金属离子的吸附具有pseudo-second-order Lagergren模型的特征,吸附平衡基本符合Langmuir模型,介质酸度对吸附效果有显著的影响,pH大于5时吸附率均可接近90%。 A test for the adsorption of Pb2+,Cu2+ and Zn2+ ions with Jingtai weathered coal at normal temperature was carried out.The adsorption kinetics,the adsorption equilibrium,the effect elements and the mechanism of adsorption were studied.The results indicate that the adsorption process was identical relatively pseudo-second-order with Lagergren model,the adsorption isothems were consistent with Langmuir equation,pH value was an important factor in adsorption process and the disposal rates all could reach 90% when pH>5.0