Cai Daniu, Zhang Yingwu, Li Jianyang, Hu Dongliang, Wang Minggong, Zhang Guangcai, Yuan Junsheng
College of Chemical Engineering and Material, Quanzhou Normal University Quanzhou 362000 Fujian China
Qingyuan Jingong Environmental Protection Technology Co., Ltd Quanzhou 362200 Fujian China.
RSC Adv. 2024 Jan 2;14(1):373-381. doi: 10.1039/d3ra01733h.
Dye wastewater discharge is a critical concern across textiles, paper, cosmetics, and other industries. This study explores the impact of dye-dye interactions on chemical coagulation and ultrafiltration process. Using basic and reactive dyes, representing cationic and anionic compounds, the intricate interplay between these dyes was examined through spectroscopic analysis. Remarkably, interactions between dyes of opposite charges exhibited significant effects on both techniques. Electrostatic attractions played a key role. Positive coagulant hydrolysates selectively attracted negative dyes, while negatively charged membranes effectively captured positive dyes. Combining dyes with opposite charges resulted in enhanced removal efficiency, addressing challenging dyes collectively. This discovery offers a novel approach to improving dye removal, utilizing opposite-charged dye mixtures can tackle stubborn dyes unmanageable by conventional methods.
染料废水排放是纺织、造纸、化妆品及其他行业的一个关键问题。本研究探讨了染料-染料相互作用对化学混凝和超滤过程的影响。使用代表阳离子和阴离子化合物的碱性染料和活性染料，通过光谱分析研究了这些染料之间复杂的相互作用。值得注意的是，相反电荷染料之间的相互作用对这两种技术都有显著影响。静电引力起到了关键作用。带正电的混凝剂水解产物选择性地吸引带负电的染料，而带负电的膜则有效地捕获带正电的染料。将相反电荷的染料混合使用可提高去除效率，共同处理具有挑战性的染料。这一发现提供了一种改进染料去除的新方法，利用带相反电荷的染料混合物可以解决传统方法难以处理的顽固染料。
