High-efficient double-cross-linked biohybrid aerogel biosorbent prepared from waste bamboo paper and chitosan for wastewater purification. (1st March 2022)

• Record Type: Journal Article
• Authors: Qiu, Chongpeng; Tang, Qi; Zhang, Xuelun; Li, Mei-Chun; Zhang, Xuefeng; Xie, Jiulong; Zhang, Shaobo; Su, Zhiping; Qi, Jinqiu; Xiao, Hui; Chen, Yuzhu; Jiang, Yongze; de Hoop, Cornelis F.; Huang, Xingyan
• Is Part Of: Journal of cleaner production. Volume 338(2022)
• Publication Date: 2022-03-01
• Subjects: Aerogel bead -- Biosorbent -- Adsorption -- Double cross-linking -- Cationic and anionic dyes; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2022.130550
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: This work prepared a double-cross-linked biohybrid aerogel (DCBA) bead biosorbent from waste bamboo paper and chitosan by sequential physical (hydrogen bonding and electrostatic interaction between -COO - and -NH3 + groups) and chemical (polymerization reaction between -COOH and -NH2, dehydration condensation between Si-OH and -OH) cross-linkings. The resulting DCBA bead was applied to remove cationic (Methylene blue, MB) and anionic (Congo red, CR) dyes in both single and binary systems. The MB and CR adsorption capacities of DCBA bead increased with increasing adsorbent dosage, contact time, temperature and initial dye concentration. With increasing solution pH, the MB adsorption capacity increased, while that for CR increased first and then decreased. The maximal adsorption capacities for MB and CR were 653.3 and 559.6 mg/g, respectively, in the single system. The thermodynamic analysis results showed a spontaneous and endothermic adsorption process. DCBA bead had a good stability and reusability with the removal efficiencies of 49.4% and 60.6% for MB and CR, respectively, after five cycles of adsorption-desorption. In the binary system, the adsorption of MB was inhibited by CR, while the removal of CR was enhanced by MB. Highlights: DCBA biosorbent was prepared using double cross-linking method. The DCBA bead exhibited excellent stability and recyclability. The maximum adsorption capacities of MB was 653.3 mg/g. The maximum adsorption capacities of CR was 559.6 mg/g. The adsorption mechanisms in single and binary systems were investigated.