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采用B、N和Ce共掺杂TiO_2降解酸性蓝BRL、活性金黄K-2RA、弱酸性黑RB和酸性大红GR 4种染料废水,考察了催化剂用量、染料初始浓度、光照时间和pH值等对其降解率的影响。结果表明:B、N和Ce共掺杂TiO_2除了能使染料快速褪色外,还能将其完全矿化为CO_2,SO_4~(2-)和NH~+_4等离子。酸性大红GR染料和酸性蓝BRL在pH=5、催化剂用量50mg、初始浓度50mg/L、光照180min时降解率分别为98%和94.2%。pH=1、催化剂用量50mg、初始浓度40mg/L、光照时间180min时,活性金黄K-2RA的降解率达94.5%。弱酸性黑RB在pH=2、催化剂用量60mg、初始浓度20mg/L、光照时间210min时,降解率达到最大,为92.6%。
Dyeing wastewater was treated with B, N and Ce co-doped TiO 2 to degrade acidic blue BRL, active golden K-2RA, weak acid black RB and acidic red GR. The effect of catalyst dosage, initial dye concentration, illumination time and pH The effect of its degradation rate. The results show that B, N and Ce co-doped TiO 2 can completely mineralize CO 2, SO 4 2- and NH 4+ ions in addition to rapidly decolorizing the dye. The acid red GR dye and acid blue BRL had the degradation rates of 98% and 94.2% at pH = 5, catalyst dosage 50mg and initial concentration 50mg / L, respectively. The degradation rate of active golden K-2RA was 94.5% when pH = 1, catalyst dosage 50 mg, initial concentration 40 mg / L and illumination time 180 min. At pH = 2, the amount of catalyst 60mg, initial concentration 20mg / L, and light irradiation time 210min, the degradation rate of the weakly acidic black RB reached 92.6%.