Uptake of Pb(II) onto nanochitosan/sodium alginate hybrid beads: Mechanism and kinetics study

被引：35

作者：

Ablouh, El-houssaine ^{[1
,2
]}

Essaghraoui, Abderrazzaq ^{[1
]}

Eladlani, Nadia ^{[2
]}

Rhazi, Mohammed ^{[2
]}

Taourirte, Moha ^{[1
]}

机构：

[1] Cadi Ayyad Univ, Fac Sci & Technol, Dept Chem, Lab Bioorgan & Macromol Chem, Marrakech, Morocco

[2] Cadi Ayyad Univ, Ecole Normale Super, Team Nat Macromol, Marrakech, Morocco

来源：

WATER ENVIRONMENT RESEARCH | 2019年 / 91卷 / 03期

关键词：

adsorption; hybrid beads; nanochitosan; sodium alginate; HEAVY-METAL IONS; LEAD II IONS; AQUEOUS-SOLUTION; ACTIVATED CARBON; ADSORPTION; CHITOSAN; REMOVAL; EQUILIBRIUM; BIOCOMPOSITE; DESORPTION;

D O I：

10.1002/wer.1050

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Nanochitosan/sodium alginate (NCS/SA) beads were prepared using nanochitosan and alginate as a high-performance absorbent for Pb(II) removal from aqueous solution. The morphology, structure, thermal stability, surface area, and elements present in the NCS/SA beads before and after adsorption were characterized using instrumental techniques like SEM, FTIR, TGA, BET, and EDX analysis, respectively. Various adsorption parameters were studied. The results indicated that the equilibrium adsorption data were fitted to Langmuir isotherms and the maximum Langmuir monolayer capacity of Pb(II) was 178.57 mg/g at 45 degrees C. The adsorption process was in good agreement with pseudo-first-order kinetic model. Mechanism studies showed that electrostatic interaction and ion exchange were the major mechanisms for lead (II) removal by the NCS/SA beads. The results of this study indicate that NCS/SA beads could be used as an effective adsorbent for the elimination of lead (II) present in aqueous solution. (C) 2019 Water Environment Federation

引用

页码：239 / 249

页数：11

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