Color stripping is one of the most convenient ways to rectify the various shade faults occurred during printing or dyeing process of textiles. But, the conventional chemical assisted process poses serious risk of the environmental pollution. Secondly, the chemical recycling of the cellulosic fibers may be disrupted due to the presence of the impurities like colorants, finishes, and the additives in the discarded textiles. So, there is a need to study ways to remove such impurities from the discarded cellulosic textiles in a sustainable manner. This work examines the decolorization of the pigment prints on cellulosic fabrics at pilot scale using an ozone-assisted process. The effect of varying pH, ozone concentration and the treatment time on the decolorization of the pigment prints was optimized using the response surface methodology technique. The effects of ozonation process parameters on the mechanical properties of cellulosic cotton fabric were measured. Decolorization of pigment printed samples was studied with respect to the surface effects by a scanning electron microscopy (SEM), and the chemical removal effects of ozonation treatment were studied using X-ray photoelectron spectroscopy. The possible mechanism regarding the action of ozone for the decolorization is discussed.

脱色是纠正纺织品在印染过程中出现的各种阴影缺陷的最便捷方法之一。但是，传统的化学辅助工艺带来了严重的环境污染风险。其次，由于废弃的纺织品中存在诸如着色剂，整理剂和添加剂之类的杂质，可能会破坏纤维素纤维的化学循环。因此，需要研究以可持续的方式从废弃的纤维素纺织品中去除这些杂质的方法。这项工作使用臭氧辅助方法在中试规模上研究了纤维素织物上颜料印花的脱色。使用响应表面方法技术优化了变化的pH值，臭氧浓度和处理时间对颜料印刷品脱色的影响。测量了臭氧化工艺参数对纤维素棉织物机械性能的影响。通过扫描电子显微镜（SEM）研究了颜料印刷样品的脱色的表面效果，并使用X射线光电子能谱研究了臭氧化处理的化学去除效果。讨论了有关臭氧对脱色作用的可能机理。