以染料废水中亚甲基蓝(MB)作为目标污染物,考察了可见光活化过二硫酸盐(PDS)体系中PDS浓度、溶液pH、MB初始质量浓度等因素对MB溶液降解性能的影响,并分析了该体系中主要的反应活性物种。结果表明:在酸性条件下,可见光活化PDS体系去除MB的效果较好,且提高PDS浓度有助于MB的降解;硫酸根自由基(·SO-4)是MB降解反应的主要活性自由基,而羟基自由基(·OH)对去除MB的影响较小。可见光活化PDS作为一种新型高级氧化技术对染料废水中有机污染物的降解效果显著。
Using methylene blue (MB) in dye wastewater as the target pollutant,the effects of,solution pH value,initial MB concentration and PDS concentration of visible light activated peroxodisulfate (PDS) system on the degradation of MB solution were investigated.The main reactive species in the system was analyzed.The results showed that the visible light activated PDS system had a better effect of removing MB under acidic conditions,and increasing the dosage of PDS were contribute to the degradation of MB.The active species quenching test showed that:·SO-4 was the main active free radical in the degradation reaction of MB,while the presence of ·OH had little effect on the removal of MB.The results confirmed that visible light activated PDS as a new advanced oxidation technology had a significant effect on the degradation of organic pollutants in dye wastewater.
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基金资助
湖南省教育厅重点科研课题(16A183);南华大学科研创新课题(193YX1022)
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