| 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 |
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| 引用本文： | 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. |
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| 作者姓名： | 谢建军 姚庆鑫 韩心强 吴义强 李新功 |
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| 作者单位： | 中南林业科技大学材料科学与工程学院,长沙,410004 |
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| 基金项目： | 国家林业公益性行业科研专项，国家自然科学基金资助项目 |
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| 摘 要： | 采用自制木粉/壳聚糖接枝丙烯酸-丙烯酰胺吸附树脂R1、R2、R3对二元金属离子Cu2 +/pb2和Zn2+/pb2+溶液中的吸附性能进行了较系统考察.pb2+离子溶液中存在竞争离子Cu2+、Zn2+时,随竞争离子浓度增加,3种吸附树脂R1、R2、R3对pb2+的吸附量明显下降,而竞争离子吸附量显著增加.二元溶液中各金属离子浓度相同时,3种树脂对竞争离子Cu2+、Zn2+的吸附量大于对pb2+的吸附量;各溶液中分别加入NaCl及NaNO3、尿素后,对pb2+离子的吸附量下降迅速.随吸附树脂用量增加,竞争离子Cu2+、Zn2+的吸附量逐渐减小,pb2+的吸附量在吸附树脂用量0.10 g/L(Zn2 +/pb2+溶液)或0.15 g/L(Cu2+/pb2+溶液)时出现最大值.溶液pH值对树脂吸附性能有显著影响.3.0＜pH＜5.O时,3种树脂对竞争离子和pb2+的吸附量快速增大;5＜ pH ＜9时,树脂对竞争离子和pb2+的吸附量基本不变;9＜pH＜ll时,树脂对pb2+的吸附量减小,而对竞争离子的吸附量或增大或减小.
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| 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 |
Selective adsorption of Pb2+ on wood flour/chitosan graft acrylic acid-acrylamide resins in two heavy metal ion solutions |
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| Xie Jianjun,Yao Qingxin,Han Xinqiang,Wu Yiqiang and Li Xingong.Selective adsorption of Pb2+ on wood flour/chitosan graft acrylic acid-acrylamide resins in two heavy metal ion solutions[J].Techniques and Equipment for Environmental Pollution Control,2013,7(8):2947-2955. |
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| Authors: | Xie Jianjun Yao Qingxin Han Xinqiang Wu Yiqiang and Li Xingong |
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| Institution: | School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China |
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| 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 NaCl, 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. |
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| Keywords: | chitosan adsorbing resin wood flour acrylic acid acrylamide graft coplolymerization competitive adsorption lead ion |
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