Study on the equilibrium and kinetics of nickel (II) adsorption on cellulose from peanut shell modified with chitosan

Ministry of Science and Technology, Vietnam Pub Date : 2024-03-15 DOI:10.31276/vjste.66(1).24-33

Thi Lan Phung, Thi Kim Giang Nguyen, Phuong Hien Ho, Thanh Nga Pham

{"title":"Study on the equilibrium and kinetics of nickel (II) adsorption on cellulose from peanut shell modified with chitosan","authors":"Thi Lan Phung, Thi Kim Giang Nguyen, Phuong Hien Ho, Thanh Nga Pham","doi":"10.31276/vjste.66(1).24-33","DOIUrl":null,"url":null,"abstract":"In this study, cellulose was produced by activating peanut shells with 5% NaOH as an alkaline agent and bleaching with 5 wt.% H2O2. Before being modified with chitosan, the cellulose was slightly oxidized with ammonium persulfate to introduce carboxyl groups. The equilibrium and kinetics of nickel adsorption on the as-prepared material were investigated. Langmuir, Freundlich, and Temkin isotherm models were used to describe the equilibrium isotherms. The Langmuir and Temkin adsorption isotherms were better fits to the equilibrium data than the Freundlich equation. The Langmuir monolayer adsorption capacity of nickel ions on cellulose from peanut shells modified with chitosan was found to be 25.70 mg/g. The Temkin adsorption constant was calculated as 0.45 kJ/mol. Therefore, the interaction between nickel ions and the surface of the as-prepared material are assumed to be weak. Kinetic data were evaluated by pseudo-first-order and pseudo-second-order models, and rate constants were determined. Simulations demonstrated that the pseudo-second-order equation could adequately describe the adsorption of nickel ions.","PeriodicalId":18650,"journal":{"name":"Ministry of Science and Technology, Vietnam","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ministry of Science and Technology, Vietnam","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.31276/vjste.66(1).24-33","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, cellulose was produced by activating peanut shells with 5% NaOH as an alkaline agent and bleaching with 5 wt.% H2O2. Before being modified with chitosan, the cellulose was slightly oxidized with ammonium persulfate to introduce carboxyl groups. The equilibrium and kinetics of nickel adsorption on the as-prepared material were investigated. Langmuir, Freundlich, and Temkin isotherm models were used to describe the equilibrium isotherms. The Langmuir and Temkin adsorption isotherms were better fits to the equilibrium data than the Freundlich equation. The Langmuir monolayer adsorption capacity of nickel ions on cellulose from peanut shells modified with chitosan was found to be 25.70 mg/g. The Temkin adsorption constant was calculated as 0.45 kJ/mol. Therefore, the interaction between nickel ions and the surface of the as-prepared material are assumed to be weak. Kinetic data were evaluated by pseudo-first-order and pseudo-second-order models, and rate constants were determined. Simulations demonstrated that the pseudo-second-order equation could adequately describe the adsorption of nickel ions.

查看原文本刊更多论文

壳聚糖改性花生壳纤维素吸附镍 (II) 的平衡和动力学研究

在这项研究中，用 5% 的 NaOH 作为碱性剂活化花生壳，并用 5 wt.% 的 H2O2 漂白，从而生产出纤维素。在用壳聚糖改性之前，先用过硫酸铵对纤维素进行轻微氧化，以引入羧基。研究了所制备材料对镍的吸附平衡和动力学。采用 Langmuir、Freundlich 和 Temkin 等温线模型来描述平衡等温线。与 Freundlich 方程相比，Langmuir 和 Temkin 吸附等温线能更好地拟合平衡数据。镍离子在经壳聚糖改性的花生壳纤维素上的朗缪尔单层吸附容量为 25.70 毫克/克。计算得出 Temkin 吸附常数为 0.45 kJ/mol。因此，假定镍离子与制备材料表面的相互作用很弱。通过伪一阶和伪二阶模型对动力学数据进行了评估，并确定了速率常数。模拟结果表明，伪二阶方程能充分描述镍离子的吸附。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ministry of Science and Technology, Vietnam

自引率

0.00%

发文量