Removal of Congo Red from Aqueous Solution Using Cuttlefish Bone Powder

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2021-12-01 DOI:10.22036/PCR.2021.278943.1901

H. Yazid, Y. Achour, A. Kassimi, I. Nadir, M. E. Himri, M. R. Laamari, M. Haddad

引用次数: 4

Abstract

Adsorption experiments were carried out as part of the removal of Congo red (CR) as textile dye from aqueous solutions by using the powder of Cuttlefish bone (Sepia) as a new potential adsorbent. The prepared powder was characterized by FTIR, XRD, SEM, and elemental analysis. The effects of solution pH, adsorbent amount, CR concentration, temperature and contact time on the adsorption of CR studied were investigated. The experimental results showed that maximum pH was about 2 for efficient uptake of CR. The equilibrium was attained in 60 min. The adsorption of Congo red was exothermic in nature (ΔH° = 8.41 kJ/mol), while the positive value of entropy 20.85 J/mol.K indicated that the increasing randomness at the solid/liquid interface. The experimental data were analyzed using Langmuir and Freundlich isothermal models. The best fit was obtained by Langmuir model with a maximum monolayer adsorption capacity of 69.9 mg/g. adsorption kinetic data were properly fitted with the pseudo second-order kinetic model.

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用墨鱼骨粉去除水溶液中的刚果红

以墨鱼骨粉为新型吸附剂，对作为纺织染料的刚果红(CR)进行了吸附实验。采用红外光谱(FTIR)、x射线衍射(XRD)、扫描电镜(SEM)和元素分析对所制粉体进行了表征。考察了溶液pH、吸附剂用量、CR浓度、温度和接触时间对所研究CR吸附的影响。实验结果表明，CR的最大吸附pH为2左右，60 min内达到吸附平衡，对刚果红的吸附为放热性质(ΔH°= 8.41 kJ/mol)，熵值为20.85 J/mol。K表示在固/液界面处随机性增加。实验数据采用Langmuir和Freundlich等温模型进行分析。Langmuir模型拟合最佳，最大单层吸附容量为69.9 mg/g。吸附动力学数据符合拟二级动力学模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

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