广西师范大学学报（自然科学版） ›› 2024, Vol. 42 ›› Issue (5): 150-162.doi: 10.16088/j.issn.1001-6600.2024030702

• 研究论文 • 上一篇    下一篇

赤泥-聚丙烯酸-羧甲基纤维素水凝胶对水中Pb2+吸附研究

付佳慧1,2,3, 王威1,2,3, 邓华1,2,3*, 赵栋1,2,3, 张舒云1,2,3, 叶顺云1,2,3, 胡乐宁1,2,3   

  1. 1.广西生态脆弱区环境过程与修复重点实验室(广西师范大学),广西 桂林 541006;
    2.珍稀濒危动植物生态与环境保护教育部重点实验室(广西师范大学),广西 桂林 541006;
    3.广西师范大学 环境与资源学院,广西 桂林 541006
  • 收稿日期:2024-03-07 修回日期:2024-04-14 出版日期:2024-09-25 发布日期:2024-10-11
  • 通讯作者: 邓华(1977—),女,湖南祁阳人,广西师范大学教授,博士。E-mail: denghua@gxnu.edu.cn
  • 基金资助:
    广西重点研发计划项目(GKAB22035038)

Adsorption Effect of Red Mud-Polyacrylic Acid-Carboxymethyl Cellulose Hydrogel on Pb2+ in Water

FU Jiahui1,2,3, WANG Wei1,2,3, DENG Hua1,2,3*, ZHAO Dong1,2,3, ZHANG Shuyun1,2,3, YE Shunyun1,2,3, HU Lening1,2,3   

  1. 1. Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions (Guangxi Normal University), Guilin Guangxi 541006, China;
    2. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin Guangxi 541006 China;
    3. College of Environment and Resources, Guangxi Normal University, Guilin Guangxi 541006, China
  • Received:2024-03-07 Revised:2024-04-14 Online:2024-09-25 Published:2024-10-11

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摘要： 为解决环境中重金属铅的污染问题,并对氧化铝冶炼中产生的工业固体废弃物赤泥进行妥当处置,本文以赤泥为原材料,通过聚合交联反应引入羧甲基纤维素钠(CMC)和丙烯酸(AA),制备得到吸附性能好、稳定性强和回收利用率高的赤泥-聚丙烯酸-羧甲基纤维素(RMAAC)复合水凝胶材料,将其作为吸附剂应用于水中Pb2+的吸附去除。结果表明,RMAAC对Pb2+的吸附主要归因于单分子层化学吸附,同时存在物理吸附,涉及的吸附机理有离子交换、官能团络合、阳离子-π和配位螯合作用。Langmuir模型计算得到的最大吸附量为730.16 mg/g,在pH为3～6时均具有较好的吸附性能。在多元重金属离子污染中,RMAAC展现出对Pb2+较高的选择性吸附能力。

关键词: 水凝胶, 赤泥, 复合材料, 铅, 吸附机理, 选择性吸附

Abstract: In order to solve the pollution of lead (Pb) in the environment and to properly dispose of red mud,an industrial solid waste generated in alumina oxide smelting. In this study,red mud was used as raw material,sodium carboxymethyl cellulose (CMC) and acrylic acid (AA) were introduced through polymerization and cross-linking reaction to prepare red mud-polyacrylic acid-carboxymethyl cellulose (RMAAC) composite hydrogel. It had adsorption performance,strong stability and high recycling rate,which were used as adsorbents for adsorption of Pb2+ in water. The adsorption of Pb2+ by RMAAC was mainly attributed to monomolecular layer chemisorption with the involvement of physisorption. The adsorption mechanisms may include ion exchange,functional group complexation,cation-π and ligand chelation. The maximum adsorption amount calculated by Langmuir model was 730.16 mg/g,and excellent adsorption properties within a broad pH range of 3 to 6. RMAAC showed high selective adsorption capacity for Pb2+ in the pollution of multiple heavy metal ions.

Key words: hydrogel, red mud, complex material, lead, adsorption mechanism, selective adsorption

中图分类号:  X53

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