文献类型：期刊文献

英文题名：Self-assembly of binary oppositely charged polysaccharides into polyelectrolyte complex hydrogel film for facile and efficient Pb2+ removal

作者：Hu, Xinyu[1,2,3,4,5] Yan, Linlin[1,2] Wang, Yongmei[1] Xu, Man[1]

第一作者：Hu, Xinyu;胡新宇

通信作者：Hu, XY[1]|[a0005881e11db1c0efa81]胡新宇;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China;[3]Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210042, Jiangsu, Peoples R China;[4]Natl Forestry & Grassland Adm, Key Lab Chem Engn Forest Prod, Beijing 100714, Peoples R China;[5]Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Peoples R China

年份：2020

卷号：388

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000533524200009)】；

基金：This work was supported by the National Natural Science Foundation of China under the Grant 31700500 and the Key Lab. of Biomass Energy and Material, Jiangsu Province (KLBEM) under the Grant JSBEM-S-201904.

语种：英文

外文关键词：Polyelectrolyte complex hydrogel film; Self-assembly; Salecan Electrostatic interactions; Adsorption capacity of Pb2+; Adsorption mechanism

摘要：Herein, a novel polyelectrolyte complex (PEC) hydrogel film has been fabricated through self-assembly of two oppositely charged polysaccharides salecan and carboxymethyl chitosan (CMCS) for Pb2+ removal. The formation of PEC network structure via electrostatic interactions was confirmed by FT-IR, XRD, XPS and TGA. The change of salecan/CMCS ratio had obvious influence on the swelling capacity, morphology and rheological properties of the hydrogel films. The adsorption capacity of Pb2+ was specifically investigated by tuning the salecan/CMCS ratio, other ions, pH, ion concentration and contact time. Furthermore, the equilibrium isotherms were better fitted with Langmuir model, indicating monolayer adsorption behaviour. The maximum adsorption capacity of Pb2+ according to Langmuir model was 418.4 mg/g, higher than that of some other adsorbents. The adsorption kinetics was well modelled by pseudo-second-order and Crank model, suggesting chemisorption and internal diffusion control mechanism. The PEC hydrogel film also exhibited excellent reusability after 5 adsorption/desorption cycles without obvious changes in the adsorption capacity. Overall, these results not only highlight a new idea for the utilization of salecan, but also provide a green method for the rational design of highly efficient adsorbent for Pb2+ removal.