Adsorbents Derived from Xylan Hemicellulose with Removal Properties of Pollutant Metals  

作　　者：Elizabeth Elgueta Yerko Becerra Ana Martínez Miguel Pereira Isabel Carrillo-Varela Felipe Sanhueza Dariela Nuez BernabéL.Rivas 

机构地区：[1]Centro de Investigación de Polímeros Avanzados,CIPA,Avenida Collao 1202,Edificio de Laboratorios,Concepcion,Chile [2]Departamento de Química Ambiental,Facultad de Ciencias,Universidad Católica de la Santísima Concepción,Caila 160-c,Concepcion,Chile [3]Polymer Department,Faculty of Chemistry,University of Concepción,Casilla 160-C,Concepcion,Chile [4]Departamento de Ingeniería Química,Facultad de Ingeniería,Universidad de Concepción,Concepcion,Chile [5]Department of Materials Engineering,Faculty of Engineering,Universidad de Concepción,Concepcion,Chile

出　　处：《Chinese Journal of Polymer Science》2023年第6期874-886,I0007,共14页高分子科学（英文版）

基　　金：financially supported by FONDECYT(Nos.11170753 and 1190469);CIPA,CONICYT Regional,GORE BIO BIO PRFC0002;the University of Concepción,Chile;。

摘　　要：The adsorption capacity of hydrogels derived from modified xylan hemicellulose has been tested in order to develop new bio-based adsorbent materials useful for removing metal ions pollutants,such as Cd(Ⅱ),Cu(Ⅱ)and Pb(Ⅱ)from an aqueous solution.Xylan was extracted from bleached kraft pulp of eucalyptus and subsequently modified with different proportions of functional sulfonic acid groups(HA3-HA7)and sulfonate groups(HS30-HS70)to generate hydrogels.The results showed that all the synthesized hydrogels were capable of adsorbing metal ions,being the hydrogels with 30%and 50%xylan the ones that presented the highest adsorption capacity.Maximum capacity studies at different initial concentrations revealed that at an initial concentration of 300 mg·L-1,the HA3 hydrogel presented an adsorption capacity of 193mg Pb(Ⅱ),182 mg Cd(Ⅱ),and 66 mg Cu(Ⅱ)per g hydrogel.The HA5 hydrogel presented a capacity of 185 mg Pb(Ⅱ),113 mg Cd(Ⅱ),and 48 mg Cu(Ⅱ)per g hydrogel.The HS30 hydrogel exhibited an adsorption of 205 mg Pb(Ⅱ),174 mg Cd(Ⅱ),and 71 mg Cu(Ⅱ)per g hydrogel,and HS50 hydrogel exhibited an adsorption capacity of 273 mg Pb(Ⅱ),143 mg Cd(Ⅱ),and 45 mg Cu(Ⅱ)per g hydrogel.These results show that modified Xylan hemicellulose is a promising adsorbent for removal Cd(Ⅱ),Cu(Ⅱ),and Pb(Ⅱ)ions from aqueous solutions.

关 键 词：Pb(Ⅱ) solution capacity 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]