CAJ | 학술논문

试验采用改进的溶胶-凝胶法制备了以Al2O3为载体的TiO2多相催化剂，并以钻井废水COD为目标降解物，考察了催化剂投加量、臭氧浓度、pH和反应时间对O3/TiO2/Al2O3催化氧化去除COD的影响。结果表明：相比于单独O3、O3/TiO2处理工艺，O3/TiO2/Al2O3明显地提高了对废水COD的去除率，且碱性pH环境利于TiO2/Al2O3催化臭氧化反应的进行；在催化剂投加量为3.75 g/L，臭氧质量浓度为80 mg/L，pH为9.4的条件下，反应25 min后，COD去除率可达92.35%，废水COD可从890 mg/L降至约68 mg/L，达到了《污水综合排放标准》（GB 8978-1996）的一级排放标准。
시험채용개진적용효-응효법제비료이Al2O3위재체적TiO2다상최화제，병이찬정폐수COD위목표강해물，고찰료최화제투가량、취양농도、pH화반응시간대O3/TiO2/Al2O3최화양화거제COD적영향。결과표명：상비우단독O3、O3/TiO2처리공예，O3/TiO2/Al2O3명현지제고료대폐수COD적거제솔，차감성pH배경리우TiO2/Al2O3최화취양화반응적진행；재최화제투가량위3.75 g/L，취양질량농도위80 mg/L，pH위9.4적조건하，반응25 min후，COD거제솔가체92.35%，폐수COD가종890 mg/L강지약68 mg/L，체도료《오수종합배방표준》（GB 8978-1996）적일급배방표준。
Improved sol-gel has been used for preparing TiO2 heterogeneous catalyst which uses Al2O3 as its carrier. Drilling wastewater COD as target degradation products,the effects of catalyst dosage,ozone concentration,pH and reaction time on COD removal by O3/TiO2/Al2O3 catalytic oxidation are investigated. The results show that comparied with O3 and O3/TiO2 treatment processes separately,the wastewater COD removing rate is greatly improved by O3/TiO2/Al2O3 process,and alkalic pH environment is good for carrying on the TiO2/Al2O3 catalytic ozonation process. Under the conditions as follows:the catalyst dosage is 3.75 g/L,ozone mass concentration 80 mg/L,and pH 9.4,and after 25 min of reaction time,the COD removing rate can reach 92.35%,wastewater COD decreases from 890 mg/L to about 68 mg/L,meeting the first class requirements of Wastewater Comprehensive Discharge Standard (GB 8978-1996).