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Preparation of bichar/layered double hydroxide@alginate aerogel as a highly efficient adsorbent for Cu2+ and Cd2+ |
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| Authors: | Qianyong Liang Ying Pan Dong Zhang Ting Lü Hongting Zhao Yan Zhang |
| Affiliation: | 1. Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, People's Republic of China
Contribution: Conceptualization (lead), Data curation (lead), Writing - original draft (lead);2. Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, People's Republic of China;3. Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, People's Republic of China Contribution: Supervision (supporting), Writing - review & editing (supporting);4. Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Zhejiang Sci-Tech University, Hangzhou, People's Republic of China Key Laboratory of Green Cleaning Technology & Detergent of Zhejiang Province, Lishui, People's Republic of China |
| Abstract: | Calcium cross-linked layered double hydroxide-bichar/alginate aerogel (LBCA) was synthesized by ultrasonic-assisted hydrothermal and freeze-drying method. The Mg-Al layered double hydroxide (LDH) was successfully loaded on the bichar (BC) and the LDH-BC was dispersed uniformly in the calcium alginate aerogel, which was confirmed by X-Ray Diffraction, scanning electron microscopy and BET tests. The obtained LBCA was applied to remove the Cu2+ and Cd2+ in the aqueous solution. As compared with LDH nanosheets, removal rates of LBCA aerogel on Cu2+ and Cd2+ were ranged from 59% to 94% and 45% to 86%, respectively. The adsorption kinetic data accorded with the pseudo second-order kinetic equation, and the isotherm data were in good agreement with the Langmuir model. Moreover, LBCA aerogel showed good regeneration ability, and raw materials for the fabrication of LBCA aerogel are abundant and low price. |
| Keywords: | aerogel alginate bichar heavy metal LDH |