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A statistical physics analysis of the adsorption of Fe3+, Al3+ and Cu2+ heavy metals on chitosan films via homogeneous and heterogeneous monolayer models
Journal of Molecular Liquids ( IF 5.3 ) Pub Date : 2021-09-22 , DOI: 10.1016/j.molliq.2021.117617
Fatma Dhaouadi 1 , Lotfi Sellaoui 1 , Sonia Taamalli 2 , Florent Louis 2 , Abderrahman El Bakali 2 , Tito Roberto Sant'anna Cadaval Junior 3 , Adrián Bonilla-Petriciolet 4 , Jorge Luiz Marques Junior 3 , Andrei VallerãoIgansi 3 , Tuanny Santos Frantz 3 , Sabrina Frantz lütke 3 , Guilherme Luiz Dotto 5 , Luiz Antonio De Almeida Pinto 3 , Abdelmottaleb Ben Lamine 1
Affiliation  

A heterogeneous monolayer model with two types of binding site was utilized to analyze and interpret the adsorption mechanism of Fe3+, Al3+ and Cu2+ ions on chitosan films at 25–55 °C and pH 6. Theoretical results of statistical physics calculations indicated that the adsorption of Fe3+, Al3+ and Cu2+ ions was multi-ionic where two adsorption sites (i.e., amino and hydroxyl groups) were involved but with a different contribution degree. Adsorption capacities at saturation ranged from 125.99 to 512.27 mg/g for tested operating conditions. The removal mechanism of Al3+ and Cu2+ ions was exothermic, whereas the adsorption of Fe3+ ions was endothermic.



中文翻译:

Fe3+、Al3+和Cu2+重金属在壳聚糖薄膜上通过均相和非均相单层模型吸附的统计物理分析

利用具有两种结合位点的异质单层模型来分析和解释 Fe 3+、Al 3+和 Cu 2+离子在 25–55 °C 和 pH 6 条件下在壳聚糖薄膜上的吸附机制。 统计物理的理论结果计算表明Fe 3+、Al 3+和Cu 2+离子的吸附是多离子的,其中涉及两个吸附位点(即氨基和羟基),但贡献程度不同。对于测试的操作条件,饱和吸附能力范围为 125.99 至 512.27 mg/g。Al 3+和Cu 2+离子的去除机理是放热的,而Fe的吸附3+离子是吸热的。

更新日期:2021-09-27
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