氧化镍改性蒙脱土复合材料吸附去除水中亚甲基蓝染料

IF 0.5 4区工程技术 Q4 CHEMISTRY, APPLIED

Indian Journal of Chemical Technology Pub Date : 2023-01-01 DOI:10.56042/ijct.v30i6.6546

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引用次数: 0

摘要

研究了氧化镍(NiO)改性蒙脱土(NiO- mt)对水溶液中亚甲基蓝(MB)的吸附去除效果，并与普通膨润土进行了比较。考察了接触时间、吸附剂用量、溶液pH、初始染料浓度和温度等实验因素对吸附性能的影响。批量吸附研究表明，当吸附剂质量为25 mg，初始浓度为100 mg/L，环境温度为25℃，天然溶液pH为(NiO-Mt为pH = 5.8，商品膨润土为pH = 6.3)时，MB在10 min内的最大吸附量约为99.9 mg/g。吸附动力学和等温线分别用拟二级模型和Langmuir模型拟合得很好。热力学参数如吉布斯自由能、焓和熵的变化被确定。两种吸附剂的吸附都是物理的、自发的和放热的。

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Removal of methylene blue dye from aqueous media by adsorption using nickel oxide modified montmorillonite composite

In this study, the adsorptive removal of methylene blue (MB) from aqueous solutions onto nickel oxide (NiO) modified montmorillonite (NiO-Mt) has been studied and compared with that of commercial bentonite. The influences of various experimental factors such as contact time, adsorbent dosage, pH of solution, initial dye concentration and temperature have been investigated. Batch adsorption studies has manifested that the maximum adsorption capacity of MB is around 99.9 mg/g in 10 min with 25 mg adsorbent mass at an initial concentration of 100 mg/L at ambient temperature of 25°C and natural pH of solution (pH = 5.8 for NiO-Mt and pH = 6.3 for commercial bentonite). The adsorption kinetics and isotherms are well fitted by pseudo-second order and Langmuir models, respectively. The thermodynamic parameters such as the changes in Gibbs free energy, enthalpy, and entropy are determined. The MB adsorption is physical, spontaneous and exothermic for both adsorbents.

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来源期刊

Indian Journal of Chemical Technology 工程技术-工程：化工

CiteScore

0.90

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Indian Journal of Chemical Technology has established itself as the leading journal in the exciting field of chemical engineering and technology. It is intended for rapid communication of knowledge and experience to engineers and scientists working in the area of research development or practical application of chemical technology. This bimonthly journal includes novel and original research findings as well as reviews in the areas related to – Chemical Engineering, Catalysis, Leather Processing, Polymerization, Membrane Separation, Pharmaceuticals and Drugs, Agrochemicals, Reaction Engineering, Biochemical Engineering, Petroleum Technology, Corrosion & Metallurgy and Applied Chemistry.