Fe-Co/γ-Al2O3催化O3/PDS处理电子工业TMAH废水试验研究
张立成 , 张宇婷 , 刘澈 , 侯瑞颖
现代化工 ›› 2026, Vol. 46 ›› Issue (10) : 146 -153.
Fe-Co/γ-Al2O3催化O3/PDS处理电子工业TMAH废水试验研究
Experimental study on the degradation of TMAH by O3/PDS catalyzed by Fe-Co/γ-Al2O3
为解决电子工业废水中难降解污染物四甲基氢氧化铵(TMAH)的处理问题,采用浸渍-煅烧法制备了双金属Fe-Co负载γ-Al2O3催化剂(Fe-Co/γ-Al2O3),用于催化臭氧-过二硫酸盐(O3/PDS)协同体系以实现TMAH的高效降解。试验结果表明,在TMAH初始浓度200 mg/L、pH=9、臭氧流量5 L/min、PDS浓度25 mmol/L、催化剂投加量1 g/L的条件下,反应90 min时TMAH的无机化率可达96.81%。自由基淬灭试验表明,硫酸根自由基(S${\mathrm{O}}_{4}^{-}$·)是降解过程中的主导活性物种,羟基自由基(·OH)起辅助作用,实现逐步去甲基化。催化剂经5次循环使用后,无机化率仍保持在85%以上,显示出良好的稳定性和再生潜力。
To address the treatment of the refractory pollutant tetramethylammonium hydroxide (TMAH) in electronic industry wastewater,this study prepared a bimetallic Fe-Co supported γ-Al2O3 catalyst (Fe-Co/γ-Al2O3) using the impregnation-calcination method.The catalyst was applied in a catalytic ozone-peroxydisulfate (O3/PDS) synergistic system to achieve efficient degradation of TMAH.Experimental results showed that under the conditions of an initial TMAH concentration of 200 mg/L,pH=9,ozone flow rate of 5 L/min,PDS concentration of 25 mmol/L,and catalyst dosage of 1 g/L,the mineralization rate of TMAH reached 96.81% after 90 min of reaction.Free radical quenching experiments indicated that sulfate radicals (S${\mathrm{O}}_{4}^{-}$·) were the dominant active species in the degradation process,while hydroxyl radicals (·OH) played an auxiliary role,achieving stepwise demethylation.After five cycles of reuse,the catalyst maintained a mineralization rate above 85%,demonstrating good stability and regeneration potential.
tetramethylammonium hydroxide / ozone / peroxydisulfate / sulfate radical
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