【摘要】 研究了不同pH条件下二氧化钛(TiO2)对腐殖酸的吸附和光催化降解过程,重点考察了腐殖酸降解过程中UV254、A436、TOC、SUVA254、AOC的变化。结果表明:随着pH值的升高,TiO2对腐殖酸的吸附率下降;当腐殖酸初始浓度为10 mg/L、初始pH=7、二氧化钛投量为2 g/L时,反应2 h后,对UV254、A436、TOC的去除率分别可达98.21%、99.11%、71.02%,SUVA254值由初始的7.58 L/(mg.m)持续降低至0.467 L/(mg.m),AOC浓度则先升高后降低。更多还原

【Abstract】 The TiO2 adsorption and photocatalytic degradation of humic acid was studied under different pH.The variation of UV254,A436,TOC,SUVA254 and AOC in the degradation process of humic acid was investigated.The results show that the adsorption rate of humic acid by TiO2 decreases with the increasing of pH value.When the initial humic acid concentration is 10 mg/L,initial pH is 7,TiO2 dosage is 2 g/L and reaction time is 2 h,the removal rates of UV254,A436 and TOC are 98.21%,99.11% and 71.02% respectively,SUVA254 value decreases from 7.58 L/(mg·m) to 0.467 L/(mg·m),and AOC concentration first increases then decreases.更多还原