离子强度对膨润土/木质素磺酸钠接枝丙烯酰胺-马来酸酐复合吸附树脂吸附pb2+/Cu2+的影响

应用化学, 2015, 32(8): 940-947. doi: 10.11944/j.issn.1000-0518.2015.08.140436

离子强度对膨润土/木质素磺酸钠接枝丙烯酰胺-马来酸酐复合吸附树脂吸附pb2+/Cu2+的影响

姚庆鑫 ^1, , 谢建军 ^2, , 刘军霞 ^3, , 唐丽萍 ^4, , 刘元 ^5,

1.中南林业科技大学材料科学与工程学院长沙 410004

2.中南林业科技大学材料科学与工程学院长沙 410004

3.中南林业科技大学材料科学与工程学院长沙 410004

4.中南林业科技大学材料科学与工程学院长沙 410004

5.中南林业科技大学材料科学与工程学院长沙 410004

基金项目: 国家自然科学基金资助项目(31270603) Supported by the National Natural Science Foundation of China(31270603)

关键词：木质素 , 吸附 , 离子强度 , 外加电解质 , 重金属离子

Effect of Ionic Strength on the Adsorption of Pb2+ and Cu2+ onto Bentonite/Sodium Lignosulfonate Graft-Polymerized with Acrylamide and Maleic Anhydride

Keywords： lignin , adsorption , ionic strength , additive electrolyte , heavy metal ions

为揭示外加电解质离子强度对重金属离子吸附的影响规律与内在机制,制备了膨润土/木质素磺酸钠接枝丙烯酰胺-马来酸酐复合吸附树脂(BLPAMA),研究了外加电解质离子强度对BLPAMA吸附单一和二元pb2 +/Cu2+的影响规律,以及有、无外加0.2 mol/L NaNO3时BLPAMA对二元pb2 +/Cu2+的吸附等温线、吸附热力学及吸附动力学.结果表明,在单一Pb2+或Cu2+溶液中,随离子强度增加,pb2+和Cu2+吸附量降低;在二元pb2 +/Cu2+溶液中,随离子强度增加,pb2+吸附量降低而Cu2+吸附量提高.

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