过碳酸钠与 CoO 的异质活化作用降解蒽醌染料废水

IF 2.8 4区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Journal of chemical technology and biotechnology Pub Date : 2024-06-10 DOI:10.1002/jctb.7684
Haoyu Fan, Yanzhao Xia, Cuizhen Sun, Rupeng Liu, Feiyong Chen, Meng Li, Weichen Zhu, Xinpeng Yang, Zhen Zhang
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引用次数: 0

摘要

蒽醌染料以蒽醌结构为核,一个或多个取代基形成不同的有机染料。蒽醌染料具有复杂的结构,使其能够稳定地存在于水环境中,但也使其比偶氮染料更具毒性。因此,残留在水中或材料表面的染料会对人类和环境造成不同程度的危害。过碳酸钠(SPC)是一种非常有前途的氧化剂,因为它的最终产品是绿色的。因此,本研究以 RB19 为目标污染物,系统研究了氧化钴(CoO)在不同条件下对 SPC 的催化性能和动力学研究。研究采用方框-贝肯设计(BBD)模型建立了 CoO/SPC 系统降解 RB19 的模型,为实际应用提供了依据。揭示了有效降解 RB19 的活性氧种类以及 CoO/SPC 系统的潜在降解机理。同时,还对 CoO/SPC 系统的实用性进行了评估。在这项研究中,利用 CoO 对活性蓝 19(RB19)降解的 SPC 活化进行了探索。实验结果表明,使用 1 mmol L-1 SPC 和 30 mg L-1 CoO 在 30 分钟内可去除近 93.8%的 RB19。研究了 SPC 浓度、CoO 用量和初始 pH 值的三因素相互作用效应。通过建立 BBD 模型,得到了 1.039 mmol L-1 SPC、33.35 mg L-1 CoO 和 7.82 初始 pH 的最佳工作条件,降解率达到 95.372%。此外,还证实了 Co2+ 的溶解度一直是 O2--(51.11%)>1O2(37.21%)>-OH(5.27%)>SPC(3.33%)>CoO(0.09%)。本研究介绍了一种耗时更短、效率更高的处理蒽醌染料废水的方法,它所需的氧化剂和催化剂更少,因此更经济。该研究提出了一种利用过渡金属氧化物引发 SPC 的直接、经济、高效的技术。© 2024 化学工业学会(SCI)。
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Degradation of Anthraquinone dye wastewater by sodium percarbonate with CoO heterogeneous activation

BACKGROUND

Anthraquinone dyes have an anthraquinone structure as their nucleus, with one or more substituents forming different organic dyes. Anthraquinone dyes have a complex structure that allows them to exist stably in water environment, but also makes them more toxic than azo dyes. This results in varying degrees of harm to both humans and the environment as a result of residual dyes in the water or on the material’ surface. Sodium percarbonate (SPC) is a highly promising oxidant due to its green end product. Therefore, in this study, the catalytic performance and kinetic study of cobalt oxide (CoO) on SPC under different conditions were systematically investigated using RB19 as the target pollutant. The Box–Behnken Design (BBD) model was used to model the degradation of RB19 by CoO/SPC system, which gives the basis for practical application. The types of reactive oxygen species that effectively degrade RB19 and the potential degradation mechanism of the CoO/SPC system were revealed. At the same time, the CoO/SPC system was evaluated in terms of its practicality.

RESULTS

In this work, the activation of SPC using CoO towards reactive blue 19 (RB19) degradation was explored. Experimental results showed that nearly 93.8% of RB19 could be removed within 30 min using 1 mmol L−1 SPC and 30 mg L−1 CoO. The three-factor interaction effects of SPC concentration, CoO dosage and initial pH were investigated. The BBD model was set up to obtain the optimum working conditions of 1.039 mmol L−1 SPC, 33.35 mg L−1 CoO and the initial pH of 7.82, which gave a degradation rate of 95.372%. Additionally, it was confirmed that the solubility of Co2+ is consistently <150 μg L−1, meeting the emission standard (1 ppm). The presence of Cl, NO3–, and HA had a similar profile, with a slight promoting effect in small amounts and an inhibitory effect when introduced in excess. The introduction of SO42– had a negligible effect on RB19 degradation, whereas the presence of HCO3 produced a slight inhibitory effect. Furthermore, the presence of PO43– showed a strong inhibitory effect. The CoO/SPC system is suitable for other organic dyes (32.7%–100%) and antibiotics (97.1–100%). Electron paramagnetic resonance (EPR) analysis and quenching experiments confirmed the presence and relative contribution of free radicals in the CoO/SPC system as CO3•- (88.12%) >O2•- (51.11%) >1O2 (37.21%) >•OH (5.27%) > SPC (3.33%) >CoO (0.09%). It has been confirmed that CoO activates SPC through electron transfer.

CONCLUSION

The present study describes a less time-consuming, and more efficient method of treating anthraquinone dye wastewater that requires less oxidizer and catalyst, making it more economical. This proposes a straightforward, cost-effective and efficient technique using SPC triggered by transition metal oxides. © 2024 Society of Chemical Industry (SCI).

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来源期刊
CiteScore
7.00
自引率
5.90%
发文量
268
审稿时长
1.7 months
期刊介绍: Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.
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