CAJ | 학술논문

用自制的二氧化钛纳米管(TNTs)作为催化剂,对腐殖酸进行TNTs/UV/O3工艺降解研究,优化了工艺参数,对相应的应用基础进行了研究.结果表明,在最佳工艺条件下,本工艺对总有机碳(TOC)去除率高达80.12%,显示了很好的降解能力.投加叔丁醇的实验得出TNTs/UV/O3对腐殖酸的降解遵循羟基自由基理论.从无机碳(IC)的角度分析得出,高pH值易于CO2溶解,从而使原水IC值增大,有助于反应过程中IC值的积累,无机碳多以CO32-及HCO3存在,对·OH有很强的抑制作用.随着反应时间的推移,催化剂污染越来越严重,一定阶段后污染率达到最大值,随后污染情况得到改善.TNTs对TiO2/UV/O3工艺具有很好的催化性能.
용자제적이양화태납미관(TNTs)작위최화제,대부식산진행TNTs/UV/O3공예강해연구,우화료공예삼수,대상응적응용기출진행료연구.결과표명,재최가공예조건하,본공예대총유궤탄(TOC)거제솔고체80.12%,현시료흔호적강해능력.투가숙정순적실험득출TNTs/UV/O3대부식산적강해준순간기자유기이론.종무궤탄(IC)적각도분석득출,고pH치역우CO2용해,종이사원수IC치증대,유조우반응과정중IC치적적루,무궤탄다이CO32-급HCO3존재,대·OH유흔강적억제작용.수착반응시간적추이,최화제오염월래월엄중,일정계단후오염솔체도최대치,수후오염정황득도개선.TNTs대TiO2/UV/O3공예구유흔호적최화성능.
In this paper, degradation of humic acid was studied by the combined technical of photocatalysis and ozonation which was catalyzed by TiO2 nanotubes (TNTs). The technological parameters were optimized and the applied bases concerned were studied. The result shows that the rate of TOC removal of humic acid by TNTs/UV/O3 reaches 80.12% under the optimal condition. It proves that radical reaction played the main role in humic acid degradation by TNTs/UV/O3. The mechanism of pH value on this technic was analyzed by inorganic carbon (IC). At high pH value,CO2 was easily dissolved so that the value of original IC was increased, which easily accumulated IC in the reaction. The IC mainly existed in CO32-and HCO3-,which had obvious inhibition to·OH.The pollution of catalyst was increased with time extending in the reaction. After a period of time, its pollution rate would reach the maximum. Then, its pollution would be improved. The study shows that TNTs are good catalysis for TiO2/UV/O3.