Removal of Methylene Blue with Hemicellulose/Clay Hybrid Hydrogels

• Published in: Chinese journal of polymer science Vol. 34; no. 6; pp. 709 - 719
• Main Authors: Cheng, He-li, Feng, Qing-hua, Liao, Chuan-an, Liu, Yu, Wu, Dong-bei, Wang, Qi-gang
• Format: Journal Article
• Language: English
• Published: Beijing Chinese Chemical Society and Institute of Chemistry, CAS 01.06.2016
• Subjects: Adsorbents; Adsorption; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Clay (material); Condensed Matter Physics; Corn; Hydrogels; Industrial Chemistry/Chemical Engineering; Mathematical analysis; Mechanical properties; Methylene blue; Polymer Sciences; 亚甲基蓝; 亚甲蓝; 半纤维素; 吸附性能; 吸附能力; 复合水凝胶; 玉米秸秆; 粘土; Clay; Hemicellulose; Adsorption; Hybrid hydrogel
• ISSN: 0256-7679; 1439-6203
• DOI: 10.1007/s10118-016-1788-2

In this study, we chose corn stover hemicellulose for the preparation of hydrogels with admirable adsorption properties under mild alkaline conditions. Clay nanosheets were introduced to this system and hemicellulose/clay hybrid hydrogels were prepared. Morphological, mechanical properties and the methylene blue adsorption behaviors of the prepared hydrogels were studied. Results suggested that the addition of clay not only improved the mechanical strength of hemicellulose-based hydrogels, but also increased the adsorption capacity on methylene blue. Moreover, the adsorptions were confirmed to follow pseudo-second order equation for both gels with and without clay. The maximum adsorption capacities on methylene blue for hemicellulose-based hydrogels with or without clay reached 148.8 and 95.6 mg/g, respectively. These results implied that hemicellulose-based hydrogels could be used as promising adsorbents for the removal of methylene blue from waste water.