Study on preparation of cellulose hydrogel and its adsorption property for Pb2+

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  • 1. College of Environmental Science and Engineering of Nankai University,Tianjin 300350;
    2. Tianjin Maolian Science & Technology Co.,Ltd.,Tianjin 300280

Received date: 2019-12-14

  Revised date: 2021-02-20

  Online published: 2021-06-10

Abstract

Four kinds of hydrogels were synthesized by free radical polymerization with different proportions of carboxymethyl cellulose sodium (CMC) and acrylamide (AM) as raw materials,N,N-methylene bis acrylamide (MBA) as crosslinking agent and sodium persulfate as initiator.They were named CMC1-AM,CMC2-AM,CMC3-AM and CMC4-AM respectively.The effects of sorbent content,pH,temperature and salinity on the Pb2+ adsorption of the hydrogel were investigated.The results showed that CMC4-AM hydrogel had the best adsorption effect on Pb2+.When the initial Pb2+ concentration was 50mg/L,the adsorbent content was 1.5g/L,the temperature was 25℃,pH=7,without salt,the removal rate of Pb2+ was the highest,which could reach 89.6%.The maximum adsorption capacity of CMC4-AM hydrogel was 53.2mg/g,and the adsorption process accorded with the quasi two level kinetic model and the Langmuir adsorption isothermal model.The adsorption process was controlled by chemisorption of monolayer adsorption.

Key words: hydrogel; adsorbent; heavy metal

Cite this article

Wang Weibin, Liu Dongfang, Feng Demao, Liu Zhenbo, Li Songrong . Study on preparation of cellulose hydrogel and its adsorption property for Pb2+[J]. New Chemical Materials, 2021 , 49(5) : 195 -199 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.05.044

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