标题: Facile one-step synthesis of CuZn-HDS/alginate hydrogel beads for highly efficient and selective removal of methyl orange

作者: Wang, Y (Wang, Yan); Feng, WP (Feng, Wenpei); Li, JJ (Li, Jinjun); You, ZX (You, Zhixiong)

来源出版物: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS  卷: 670  文献号: 131561  DOI: 10.1016/j.colsurfa.2023.131561  出版年: AUG 5 2023  

摘要: Hydroxy double salts (HDSs) have shown enormous potential for removing dyes from wastewater. However, the powder form of HDSs limits their potential in commercial applications. Herein, we proposed a facile one-step route to incorporate CuZn-HDS into the copper alginate matrix for methyl orange removal. This strategy could not only shape CuZn-HDS to beads but also significantly enhance the adsorption ability of the matrix. The obtained composite hydrogel beads displayed high water stability and excellent adsorption performance for MO, with more than 98% of MO being removed by CuZn-HDS/Alg-0.5. The maximum adsorption capacity of CuZnHDS/Alg-0.5 for MO was 763.3 mg center dot g 1 at 298 K. Besides, the adsorption process matched the pseudo-secondorder kinetic model and fitted well with the Freundlich model, suggesting that the adsorption of MO onto CuZn-HDS/Alg-0.5 was a multilayer chemical adsorption process. More importantly, CuZn-HDS/Alg-0.5 could selectively adsorb MO from MO & RhB (Rhodamine B) and MO & MB (Methylene blue) mixed solution. Mechanism studies indicated that the removal of MO was attributed to the electrostatic interaction, complexation interaction and ion exchange interaction between MO and CuZn-HDS/Alg-0.5. This work opens a new route for developing eco-friendly and efficient adsorbents to remove dyes from wastewater.

作者关键词: One-step route; Hydrogel beads; CuZn-HDS; Methyl orange; Adsorption mechanism

KeyWords Plus: LAYERED DOUBLE HYDROXIDES; AQUEOUS-SOLUTION; ACTIVATED CARBON; MALACHITE GREEN; DYE REMOVAL; ADSORPTION; ALGINATE; DEGRADATION; COMPOSITE; WATER

地址: [Wang, Yan; Feng, Wenpei; Li, Jinjun; You, Zhixiong] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

通讯作者地址: You, ZX (通讯作者)，Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

电子邮件地址: zyou@whu.edu.cn

影响因子：5.2