Abstract：
The treatment of textile wastewater containing harmful metal ions poses a significant challenge in industrial applications due to its environmental impact. In this study, the use of sulfite for treating simulated dye wastewater containing New Coccine (NC) and Cr(VI) was investigated. The removal of NC was influenced by the redox reaction between Cr(VI) and sulfite, demonstrating a strong self-boosting effect of Cr(VI) on NC removal. Remarkable NC decoloration (95%) and Cr(VI) reduction (90%) were achieved within 1 min, highlighting the effectiveness of the treatment. Quenching experiments and electron paramagnetic resonance (EPR) technology confirmed that singlet oxygen (1O2) was the main oxidative agent for organic dye removal and SO4•-, •OH and Cr(V) were also identified as key contributors to NC degradation. The Cr(VI)/sulfite system exhibited higher efficiency in degrading azo dyes, such as NC and Congo Red (CR), compared to non-azo dyes like Methylene Blue (MB). This superiority may be attributed to the action of Cr(V) on azo groups. Additionally, the COD removal experiments were conducted on the actual dye wastewater, showing the excellent performance of the Cr(VI)/Sulfite system in treating industrial textile wastewater. This approach presents a promising strategy for effective \"waste control by waste\", offering great potential for addressing challenges related to dye wastewater treatment and environmental pollution control in practical industrial scenarios.
摘要：
由于其对环境的影响，含有有害金属离子的纺织废水的处理在工业应用中提出了重大挑战。在这项研究中,研究了亚硫酸盐处理含有新可可碱（NC）和Cr（VI）的模拟染料废水的方法。Cr(VI)与亚硫酸盐的氧化还原反应影响NC的去除,证明了Cr（VI）对NC去除有很强的自增强作用。在1分钟内实现显著的NC脱色(95%)和Cr(VI)降低(90%),强调治疗的有效性。淬火实验和电子顺磁共振（EPR）技术证实，单线态氧（1O2）是去除有机染料和SO4•-的主要氧化剂，·OH和Cr(V)也被确定为NC降解的关键贡献者。Cr(VI)/亚硫酸盐体系对偶氮染料的降解效率较高,如NC和刚果红(CR)，与非偶氮染料如亚甲基蓝（MB）相比。这种优越性可归因于Cr(V)对偶氮基团的作用。此外,对实际染料废水进行了COD去除实验,Cr(VI)/亚硫酸盐体系处理工业纺织废水的优良性能。这种方法为有效地“通过废物控制废物”提供了有希望的策略，在实际工业场景中，为解决与染料废水处理和环境污染控制相关的挑战提供了巨大的潜力。
