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Cost-effective reactive dyeing using spent cooking oil for minimal discharge of dyes and salts
Journal of Cleaner Production ( IF 9.7 ) Pub Date : 2019-04-24 , DOI: 10.1016/j.jclepro.2019.04.277
Linyun Liu , Bingnan Mu , Wei Li , Yiqi Yang

A reactive dyeing system is designed based on controllable chemical potential difference between the external and internal phases for minimal discharge of pollutants. Conventional aqueous reactive dyeing is widely used for cotton, generating large quantities of wastewater containing high concentrations of hydrolyzed dyes and salts. Although new reactive dyeing technologies have been developed to reduce pollutant discharge, they all failed due to release of toxic organic solvents or high costs. In the newly developed dual-liquid-phase system, spent cooking oil is served as external phase to disperse reactive dyes, while water is served as internal phase to swell cotton and fix dyes with alkali. 100% of reactive dyes move into the internal phase without the help of salts due to high chemical potential of dyes in the external phase. Compared to conventional aqueous system, the dual-liquid-phase system improves dye fixation by 33% and reduces discharge of dyes by 82% when the initial input of dyes is 3% owf. Discharge of salts is reduced by 100%. The external phase is reusable and biodegradable. Cotton fabrics were dyed with the dual-liquid-phase system on a pilot scale and achieved the same dyeing quality as those from conventional aqueous system. The dual-liquid-phase system also consumes less materials and energy than conventional aqueous system, indicating economic feasibility. The dual-liquid-phase system could be applied to current dyeing equipment, enabling quick implementation of lab results into real production. Clean large-scale reactive dyeing could be achieved with the dual-phase-liquid system.



中文翻译:

使用废烹饪油进行具有成本效益的反应性染色,可最大程度地减少染料和盐的排放

基于外相和内相之间可控的化学势差来设计反应性染色系统,以最大程度地减少污染物的排放。常规的水性反应性染色被广泛用于棉花,产生大量废水,其中含有高浓度的水解染料和盐。尽管已经开发了新的反应性染色技术来减少污染物的排放,但由于有毒有机溶剂的释放或高成本,它们均未能通过。在新开发的双液相系统中,用过的食用油作为外相来分散活性染料,而使用水作为内相来使棉花膨胀并用碱固定染料。由于染料在外相中具有很高的化学势,因此100%的活性染料无需盐便即可进入内相。与传统的水性体系相比,当染料的初始输入量为3%owf时,双液相体系可将染料固色性提高33%,并减少82%的染料排放。盐的排放减少了100%。外相可重复使用且可生物降解。用双液相系统对棉织物进行中试染色,并获得与常规水性系统相同的染色质量。与传统的水性系统相比,双液相系统还消耗更少的材料和能量,表明了经济可行性。该双液相系统可以应用于当前的染色设备,从而能够将实验室结果快速实施到实际生产中。双相液系统可以实现清洁的大规模反应性染色。当染料的初始输入量为3%owf时,双液相系统可将染料固色率提高33%,并将染料排放量降低82%。盐的排放减少了100%。外相可重复使用且可生物降解。用双液相系统对棉织物进行中试染色,并获得与常规水性系统相同的染色质量。与传统的水性系统相比,双液相系统还消耗更少的材料和能量,表明了经济可行性。该双液相系统可以应用于当前的染色设备,从而能够将实验室结果快速实施到实际生产中。双相液系统可以实现清洁的大规模反应性染色。当染料的初始输入量为3%owf时,双液相系统可将染料固色率提高33%,并将染料排放量降低82%。盐的排放减少了100%。外相可重复使用且可生物降解。用双液相系统对棉织物进行中试染色,并获得与常规水性系统相同的染色质量。与传统的水性系统相比,双液相系统还消耗更少的材料和能量,表明了经济可行性。该双液相系统可以应用于当前的染色设备,从而能够将实验室结果快速实施到实际生产中。双相液系统可以实现清洁的大规模反应性染色。盐的排放减少了100%。外相可重复使用且可生物降解。棉织物用双液相系统在中试规模上进行染色,并达到了与常规水性系统相同的染色质量。与传统的水性系统相比,双液相系统还消耗更少的材料和能量,表明了经济可行性。该双液相系统可以应用于当前的染色设备,从而能够将实验室结果快速实施到实际生产中。双相液系统可以实现清洁的大规模反应性染色。盐的排放减少了100%。外相可重复使用且可生物降解。用双液相系统对棉织物进行中试染色,并获得与常规水性系统相同的染色质量。与传统的水性系统相比,双液相系统还消耗更少的材料和能量,表明了经济可行性。该双液相系统可以应用于当前的染色设备,从而能够将实验室结果快速实施到实际生产中。双相液系统可以实现清洁的大规模反应性染色。与传统的水性系统相比,双液相系统还消耗更少的材料和能量,表明了经济可行性。该双液相系统可以应用于当前的染色设备,从而能够将实验室结果快速实施到实际生产中。双相液系统可以实现清洁的大规模反应性染色。与传统的水性系统相比,双液相系统还消耗更少的材料和能量,表明了经济可行性。该双液相系统可以应用于当前的染色设备,从而能够将实验室结果快速实施到实际生产中。双相液系统可以实现清洁的大规模反应性染色。

更新日期:2019-04-24
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