Performance of cross-linked chitosan-zeolite composite adsorbent for removal of Pb2+ions from aqueous solutions: Experimental and Monte Carlo simulations studies

被引：53
作者：
Senol, Zeynep Mine [1 ]
Elma, Elif [2 ]
El Messaoudi, Noureddine [3 ]
Mehmeti, Valbone [4 ]
机构：
[1] Sivas Cumhuriyet Univ, Fac Hlth Sci, Dept Nutr & Diet, TR-58140 Sivas, Turkiye
[2] Sivas Cumhuriyet Univ, Fac Sci, Dept Chem, TR-58140 Sivas, Turkiye
[3] Ibn Zohr Univ, Lab Appl Chem & Environm, Agadir 80000, Morocco
[4] Univ Prishtina, Fac Agr & Vet, Prishtina 10000, Kosovo
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2023年 / 391卷
关键词：
Chitosan; Zeolite; Composite beads; Pb2+ions; Adsorption; MC simulations; METHYLENE-BLUE ADSORPTION; KINETICS; SORPTION; ACID; EQUILIBRIUM; PB(II); MODEL; IONS;
D O I：
10.1016/j.molliq.2023.123310
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：
In this study, we investigated the performance of a cross-linked chitosan (Ch)-zeolite (Z) composite (Ch-Z) adsorbent for the removal of Pb2+ ions from water. The results revealed that the Ch-Z composite exhibited excellent adsorption performance for Pb2+ ions. The maximum adsorption capacity was found to be 275 mg g-1 at pH 4.5, Ch-Z composite dose of 5 g/L and an initial Pb2+ concentration of 1000 mg/L for 24 h. The adsorption equilibrium data and its kinetics followed a Langmuir and PSO models. Furthermore, thermodynamic parameters were determined, indicating that adsorption was spontaneous and endothermic. MC simulations were used to investigate the interaction between Pb2+ ions and the modeled composite. The considerable negative adsorption energy values confirm the strong affinity between the adsorbate molecules and the adsorbent surface. Overall, the Ch-Z composite adsorbent exhibited remarkable potential to remove Pb2+ ions from wastewater.
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页数：12
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