Equilibrium and kinetic investigation of reactive extraction of pyridine-2-carboxylic acid using corn oil as diluent

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-15 DOI:10.1007/s43153-024-00441-3

Ruta D. Khonde, Mayuresh V. Shivramwar

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Abstract

Toxic chemical release is the major issue of concern of the industrial effluents. Hence, recovery of chemicals from effluent stream is of great research interest. Present investigation was focused on recovery of pyridine-2-carboxylic acid (picolinic acid) from aqueous streams by reactive extraction using corn oil as a non-toxic diluent. Attempts have been made to estimate the recovery of picolinic acid by chemical extraction and to investigate its kinetic parameters. The kinetic modeling was also carried out for chemical extraction by the law of mass action. Extraction equilibria had been reported and effect of acid concentration, agitation speed and extractant-diluent composition were studied at room temperature. Kinetic study reveals very slow, first order reaction in acid concentration and zero order in extractant, tri-butyl phosphate. The reaction rate constant of 0.191 s⁻¹ suggests a slow type of reaction. The diffusivity of picolinic acid in corn oil was found to be 7.0170 × 10^–11 m² s⁻¹. Although the distribution coefficient is very low and reaction is infinitely slow, the non-toxicity of corn oil used in this study is the key parameter for its use as diluent.

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以玉米油为稀释剂反应萃取吡啶-2-羧酸的平衡和动力学研究

有毒化学物质的释放是工业废水的主要问题。因此，从废水中回收化学品是一项非常有意义的研究。目前的研究重点是使用玉米油作为无毒稀释剂，通过反应萃取从水流中回收吡啶-2-羧酸（吡啶甲酸）。尝试估算化学萃取法回收的吡啶甲酸，并研究其动力学参数。还利用质量作用定律对化学萃取进行了动力学建模。报告了萃取平衡，并研究了室温下酸浓度、搅拌速度和萃取剂-稀释剂成分的影响。动力学研究表明，酸浓度的一阶反应非常缓慢，而萃取剂磷酸三丁酯的一阶反应为零。反应速率常数为 0.191 s-1，表明反应速度很慢。皮啶酸在玉米油中的扩散率为 7.0170 × 10-11 m2 s-1。虽然分布系数很低，反应也无限缓慢，但本研究中使用的玉米油的无毒性是其用作稀释剂的关键参数。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.