CAJ | 학술논문

以Pt／TiO2为光催化剂，研究了废水中对氟苯氧乙酸的光催化降解反应。考察了反应时间、溶液初始pH值以及污染物初始浓度对光催化反应的影响。实验表明，反应3h内，氟离子平均检出速率为2.64×10-5mol／（L· h）；在反应4～7h内，氟离子平均检出速率为5.38×10-5mol／（ L· h）。反应液的紫外光谱图显示对氟苯氧乙酸浓度不断下降。在溶液初始pH值为3.44～4.95时，光催化生成氟离子的速率最大，在碱性范围内，氟离子的生成速率为零。当C0（对氟苯氧乙酸）＜1.00×10-3 mol· L-1时，光催化降解反应速率随着对氟苯氧乙酸初始浓度的增大而急剧增大；当C0（对氟苯氧乙酸）＞8.00×10-3 mol· L -1时，光催化降解速率与污染物初始浓度无关。
이Pt／TiO2위광최화제，연구료폐수중대불분양을산적광최화강해반응。고찰료반응시간、용액초시pH치이급오염물초시농도대광최화반응적영향。실험표명，반응3h내，불리자평균검출속솔위2.64×10-5mol／（L· h）；재반응4～7h내，불리자평균검출속솔위5.38×10-5mol／（ L· h）。반응액적자외광보도현시대불분양을산농도불단하강。재용액초시pH치위3.44～4.95시，광최화생성불리자적속솔최대，재감성범위내，불리자적생성속솔위령。당C0（대불분양을산）＜1.00×10-3 mol· L-1시，광최화강해반응속솔수착대불분양을산초시농도적증대이급극증대；당C0（대불분양을산）＞8.00×10-3 mol· L -1시，광최화강해속솔여오염물초시농도무관。
In the presence of Pt/TiO2 ,the photocatalytic degradation of p-Fluorophenoxyacetic acid in sewage had been studied.Effects of reaction time , initial pH and initial concentration of pollutant on photocatalytic degradation were investigated.The experimen showed that average photocatalytic generation fluorine ion rate was 2.64 ×10 -5 mol/( L· h) within 3h.Average photocatalytic generation fluorine ion rate was 5.38 ×10 -5 mol/( L· h) within 4~7 h.Ultraviolet specture of reaction solution showed that the concentration of p-Fluorophenoxyacetic acid continuously decreased.In initial pH value of solution was 3.44~4.95 ,the rate of photocatalytic fluorine ion generation was maxi-mum,in alkaline range,the rate of photocatalytic fluorine ion generation was zero.Within C0(p-Fluorophenoxyacetic acid) <1.00 ×10 -3mol· L-1,photocatalytic degradation generation fluorin ion rate increased.Within C0(p-Fluorophenoxyacetic acid) >8.00 ×10 -3 mol· L-1 ,photocatalytic degradation generation fluorine ion rate was almost constant.