Congo red recovery from water using green extraction solvents

IF 4.5 3区工程技术 Q1 WATER RESOURCES Water Resources and Industry Pub Date : 2022-06-01 DOI:10.1016/j.wri.2021.100170

Lorena Villar Blanco , Olalla González Sas , Pablo B. Sánchez , Ángeles Domínguez Santiago , Begoña González de Prado

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引用次数: 14

Abstract

Dyes are pollutants widely used in several industries that end up dumped as wastewater, contributing to water pollution. In the scope of improving water quality, liquid-liquid extraction is a separation technique widely used to remove pollutants from water, due to the possibility of recovering all the involved agents. In this work, deep eutectic solvents (DESs) based on mixtures of thymol with menthol, coumarin, octanoic acid and decanoic acid were applied as extraction agents to remove congo red from water. Among all the studied solvents, those formed by thymol with organic acids showed extraction efficiencies higher than 90% for low initial concentrations of congo red, using 1/5 (v/v) DES/water proportion and 1 h of stirring time as extraction parameters. The best results were achieved using Thymol:Octanoic acid (1:1) solvent. Furthermore, at the end of the process each reagent can be reused. DES reusability was checked for three extraction cycles, keeping stable.

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使用绿色提取溶剂从水中回收刚果红

染料是一种广泛应用于多个行业的污染物，最终被作为废水排放，造成水污染。在改善水质的范围内，液-液萃取是一种广泛用于去除水中污染物的分离技术，因为它可以回收所有涉及的药剂。以百里香酚与薄荷醇、香豆素、辛酸和癸酸的混合物为萃取剂，采用深度共晶溶剂(DESs)萃取水中刚果红。在所研究的溶剂中，以1/5 (v/v) DES/水比和1h搅拌时间为提取参数，百里香酚与有机酸形成的溶剂对初始浓度较低的刚果红的提取率均高于90%。以百里酚:辛酸(1:1)为溶剂效果最佳。此外，在过程结束时，每种试剂都可以重复使用。在3个提取周期内检查DES的可重复使用性，保持稳定。

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来源期刊

Water Resources and Industry Social Sciences-Geography, Planning and Development

CiteScore

8.10

自引率

5.90%

发文量

审稿时长

75 days

期刊介绍： Water Resources and Industry moves research to innovation by focusing on the role industry plays in the exploitation, management and treatment of water resources. Different industries use radically different water resources in their production processes, while they produce, treat and dispose a wide variety of wastewater qualities. Depending on the geographical location of the facilities, the impact on the local resources will vary, pre-empting the applicability of one single approach. The aims and scope of the journal include: -Industrial water footprint assessment - an evaluation of tools and methodologies -What constitutes good corporate governance and policy and how to evaluate water-related risk -What constitutes good stakeholder collaboration and engagement -New technologies enabling companies to better manage water resources -Integration of water and energy and of water treatment and production processes in industry