环境工程学报2013，Vol.7Issue(8)：2947-2955,9.
木粉/壳聚糖接枝丙烯酸-丙烯酰胺吸附树脂对二元重金属离子溶液中Pb2+的吸附
Selective adsorption of Pb2+ on wood flour/chitosan graft acrylic acid-acrylamide resins in two heavy metal ion solutions
摘要
Abstract
The adsorption properties of three self-made wood flour/chitosan graft acrylic acid-acrylamide copolymerization resins (note as adsorbing resin R1,R2 and R3) were explored in detail for two metal ions,Cu2+/Pb2+ and Zn2+/Pb2+ mixing solutions.While there were the competitive ions Cu2+ and Zn2+ in Pb2+ solutions,the adsorption capacities of Pb2 + for three adsorption resins R1,R2 and R3 decreased obviously and those of the competitive ions Cu2 + and Zn2 + increased fastly with an increase of the concentrations of Cu2 + and Zn2 + The adsorption capacities of the competitive ions Cu2 + and Zn2 + were larger than those of Pb2 + when the concentration of each metal ions was equal in two metal ion solutions and those of Pb2+ decreased after NaC1,NaNO3 and urea were added into the metal ion Zn2+/Pb2+ or Cu2+/Pb2+ solution.When the masses(usage) of the adsorbing resins increased,the adsorption capacities of the competitive ions Cu2+ and Zn2+ decreased gradually while those of Pb2+ had a maximum at the mass concentration 0.10 g/L for Zn2+/Pb2+ solution or 0.15 g/L for Cu2+/Pb2+ solution with an increase of the usage of three types of the adsorption resins.The pH values of the Zn2+/Pb2+ or Cu2+/Pb2+ solution had an obvious effect on the adsorption properties of three resins R1,R2 and R3.The adsorption capacities of Cu2+,Zn2+ and Pb2+ for three resins R1,R2 and R3 increased quickly when the pH value was between 3 and 5,and these hardly changed when the pH value was between 5 and 9,while the adsorption capacities of Pb2+ for three resins R1,R2 and R3 decreased,and these of Cu2+ and Zn2+ for three resins R1,R2 and R3 either increased or decreased when the pH value was between 9 and 11.关键词
壳聚糖/吸附树脂/木粉/丙烯酸/丙烯酰胺/接枝共聚/竞争吸附/铅离子Key words
chitosan/ adsorbing resin/ wood flour/ acrylic acid/ acrylamide/ graft coplolymerization/ competitive adsorption/ lead ion分类
化学化工引用本文复制引用
谢建军,姚庆鑫,韩心强,吴义强,李新功..木粉/壳聚糖接枝丙烯酸-丙烯酰胺吸附树脂对二元重金属离子溶液中Pb2+的吸附[J].环境工程学报,2013,7(8):2947-2955,9.基金项目
国家林业公益性行业科研专项(201104004) （201104004）
国家自然科学基金资助项目(31270603) （31270603）
