摘要：

选用工业废弃的铁刨花作为ZVI供体，采用ZVI-H₂O₂法与ZVI-Na₂S₂O₈法对含有二甲基亚砜（DMSO）的实际碳纤维生产废水进行处理。结果表明：在ZVI-H₂O₂体系中，对DMSO起主要降解作用的为·OH；当H₂O₂浓度为0.15 mol/L，铁刨花投量为100 g/L，初始pH=3时，DMSO去除率达79.0%。在ZVI-Na₂S₂O₈体系中，SO₄^·-与·OH均对DMSO的去除起作用；当Na₂S₂O₈浓度为0.15 mol/L，铁刨花投量为50 g/L，初始pH=5时，DMSO去除率为49.3%。SEM表征结果显示，反应过程中铁刨花表面受到腐蚀，促进了反应进行，反应后铁泥为纳米级颗粒。

关键词: 高级氧化技术, 羟基自由基, 硫酸根自由基, 铁刨花, 二甲基亚砜

Abstract:

The ZVI-H₂O₂ and ZVI-Na₂S₂O₈ oxidation processes with iron scraps from industrial waste as ZVI donors were adopted to treat the dimethyl sulfoxide(DMSO) containing wastewater from a carbon fiber Co., Ltd., in Jiangsu province. The results showed that in ZVI-H₂O₂ system, hydroxyl radical(·OH) played a key role in DMSO degradation. When the H₂O₂ concentration was 0.15 mol/L, zero-valent iron dosage was 100 g/L and initial pH was 3, the removal rate of DMSO reached 79.0%. In ZVI-Na₂S₂O₈ system, sulfate radical(SO₄^·-) and hydroxyl radical(·OH) existed simultaneously, both of which contributed to DMSO degradation. When the Na₂S₂O₈ concentration was 0.15 mol/L, zero-valent iron dosage was 50 g/L and initial pH was 5, the removal rate of DMSO reached 49.3%. The SEM showed that ZVI was corroded during the degradation process, which enhanced the oxidation process by the released iron species. The generated iron sludge was nano-sized.

Key words: AOPs, hydroxyl radical, sulfate radical, iron scraps, dimethyl sulfoxide (DMSO)

中图分类号: 

• X703.1