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首页> 外文期刊>Journal of industrial and engineering chemistry >Extraction and recovery of rhodamine B, methyl violet and methylene blue from industrial wastewater using D2EHPA as an extractant
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Extraction and recovery of rhodamine B, methyl violet and methylene blue from industrial wastewater using D2EHPA as an extractant

机译：使用D2EHPA作为萃取剂从工业废水中提取和回收若丹明B，甲基紫和亚甲基蓝

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摘要

The extraction behavior of cationic dyes namely rhodamine B (RB), methyl violet (MV) and methylene blue (MB) from industrial wastewater has been investigated using di-(2-ethylhexyl) phosphoric acid (D2EHPA) in hexane as a carrier. The extraction of cationic dyes increases with decreasing feed phase pH and increasing D2EHPA concentration in organic phase. The stripping percentage of dyes using acetic acid as the stripping agent from loaded D2EHPA was found to increase with increasing acid concentration. 98% stripping efficiency of dyes was achieved with 8.5 mol/L acetic acid solution at an organic:aqueous phase ratio (O/A) of 2:1. Parameters examined include D2EHPA concentration, effect of diluents, effect of pH, effect of initial dye concentration, equilibration time, and various stripping agents, aqueous to organic phase ratio in extraction and organic to aqueous phase ratio in stripping.
机译：以己二酸（2-乙基己基）磷酸（D2EHPA）为载体，研究了工业废水中若丹明B（RB），甲基紫（MV）和亚甲基蓝（MB）等阳离子染料的萃取行为。阳离子染料的萃取随着进料相pH的降低和有机相中D2EHPA浓度的增加而增加。发现使用乙酸作为负载的D2EHPA的汽提剂，染料的汽提百分比随酸浓度的增加而增加。用8.5 mol / L的乙酸溶液以2：1的有机：水相比率（O / A）达到98％的染料去除率。检查的参数包括D2EHPA浓度，稀释剂的影响，pH的影响，初始染料浓度的影响，平衡时间和各种汽提剂，萃取中水与有机相的比率以及汽提中有机与水相的比率。

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