Polypyrrole-decorated Mg-Al layered double oxides for dye adsorption: Isotherm, kinetics, and thermodynamic investigations

被引：4
|
作者：
Peng, Hao
Shen, Yue [1 ]
Luo, Meiying [2 ]
Zheng, Xiaogang [1 ]
Wen, Jing [3 ]
机构：
[1] Yangtze Normal Univ, Coll Chem & Chem Engn, Chongqing 408100, Peoples R China
[2] Neijiang Normal Univ, Coll Chem & Chem Engn, Neijiang 641100, Sichuan, Peoples R China
[3] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sal, Qinghai Prov Key Lab Salt Lake Resources Chem, Xining 810008, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2023年 / 824卷
关键词：
Mg-Al LDO; Polypyrrole; Adsorption; Rhodamine B; AQUEOUS-SOLUTION; CONGO RED; EFFICIENT REMOVAL; ADSORBENT; CR(VI); NANOCOMPOSITE; NANOSHEETS;
D O I：
10.1016/j.cplett.2023.140568
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Polypyrrole-decorated Mg-Al layered double oxides (PPy/Mg-Al) were prepared via the in-situ polymerization for enhancing the adsorption capacity of Rhodamine B (RhB). For comparison to Mg-Al layered double oxides, PPy/Mg-Al composites presented the better adsorption capacity, which climbed and then declined with an in-crease PPy content. The optimal 2-PPy/Mg-Al had the best Langmuir adsorption capacity of 200.10 mg g-1, and its tested adsorption capacity decreased from 137.13 to 118.13 mg g-1 after seven cycles due to the change in the valance sates of surface compositions and surface discharge nature. 2-PPy/Mg-Al exhibited a spontaneous and endothermic adsorption process for RhB removal, and its adsorption isotherms and kinetics were respectively described by Langmuir and second-order models. Hence, the in-situ polymerization of pyrrole was a promising route to enhance the adsorption activity of Mg-Al LDO for dyes removal from wastewater.
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页数：8
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