Study on removal mechanism of thiocyanate in petrochemical wastewater enhanced by ozone micro-nano bubbles

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Apr.2026, Vol.49 No.4: 498-504

DOI: 10.3969/j.issn.1003-5060.2026.04.009

Authors

SUN Mingcai $ ^{1,2} $, WANG Jin $ ^{1,2} $, WANG Shu $ ^{1,2} $, ZHAN Xinyuan $ ^{1,2} $, YUE Zhengbo $ ^{1,2} $, MA Ding $ ^{1,2} $

(1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Engineering Research Center of Industrial Wastewater Treatment and Resource Recovery, Hefei 230009, China)

Abstract and Keywords

Abstract: This paper utilized ozone( $ O_{3} $) micro-nano bubbles(MNBs) technology to remove thiocyanate (SCN $ ^{-} $) from water, enhanced the removal of the target by improving the generation of $ O_{3} $-MNBs, explored the effects of different reaction conditions on the removal efficiency of $ SCN^{-} $and the kinetic characteristics of the first-stage reaction, and preliminarily revealed the removal mechanism of $ SCN^{-} $. The results showed that when the $ O_{3} $ flow rate was 250 mL/min, the initial mass concentration of $ SCN^{-} $solution was 100 mg/L and the pH value was 3, the reaction rate of $ SCN^{-} $removal was the fastest and the removal rate was 100%. The low concentration of coexisting ions in the water did not have a significant effect on the removal of $ SCN^{-} $. The removal mechanism of $ SCN^{-} $showed that the hydroxyl radical was the main radical in the $ O_{3} $-MNBs reaction system, and the nitrogen in $ SCN^{-} $was partly converted to $ N_{2} $ and partly converted to ammonia nitrogen in the system. $ SCN^{-} $can be effectively removed from petrochemical wastewater by using the $ O_{3} $-MNBs technology, and the study can provide a reference for the treatment of petrochemical wastewater.

Keywords: ozone( $ O_{3} $); micro-nano bubbles (MNBs); thiocyanate (SCN $ ^{-} $); hydroxyl radical; petrochemical wastewater

作者信息

孙铭材 $ ^{1,2} $，王进 $ ^{1,2} $，汪舒 $ ^{1,2} $，詹欣源 $ ^{1,2} $，岳正波 $ ^{1,2} $，马丁 $ ^{1,2} $

(1. 合肥工业大学资源与环境工程学院，安徽合肥 230009；2. 安徽省工业废水处理与资源化工程研究中心，安徽合肥 230009)

摘要和关键词

摘要: 文章利用臭氧 $ \left(\mathrm{O}_{3}\right) $微纳米气泡(micro-nano bubbles, MNBs)技术去除水中的硫氰酸根 $ \left(\mathrm{SCN}^{-}\right) $，通过改进 $ O_{3}-NMBs $的产生方式强化目标物的去除，探究不同反应条件对 $ SCN^{-} $去除效率的影响和一级反应动力学特征，并初步揭示 $ SCN^{-} $的去除机理。结果表明：当 $ O_{3} $流量为250 mL/min、 $ SCN^{-} $溶液初始质量浓度为100 mg/L且pH=3时， $ SCN^{-} $反应速率最快且去除率为100%；水中低质量浓度的共存离子不会对 $ SCN^{-} $去除效果产生显著影响。 $ SCN^{-} $的去除机理表明，羟基自由基是 $ O_{3}-NMBs $反应体系中起主要作用的自由基， $ SCN^{-} $中的氮在该体系中一部分转化为 $ N_{2} $，另一部分转变为氨氮。 $ O_{3}-NMBs $技术可有效去除石化废水中的 $ SCN^{-} $，研究结果可为实际石化废水处理提供参考。

关键词: 臭氧 $ O_{3} $; 微纳米气泡(MNBs); 硫氰酸根 $ \left(\mathrm{SCN}^{-}\right) $; 羟基自由基; 石化废水

Funding

国家自然科学基金联合基金资助项目（U19A20108）；安徽省自然科学基金资助项目（2308085QE187）和中央高校基本科研业务费专项资金资助项目（JZ2022HGQB0214）

合肥工业大学学报(自然科学版)

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