摘要：
The degradation effect of SCN-is investigated by using UV irradiation after the addition of hydrogen peroxide (H2O2) in different condition.It is found that the removal rate of SCN-is 96.88％under SCN-initial concentration of 100 mg/L, light intensity of 9.94 m W/cm2, initial p H of 7, H2O2concentration of 2.25 mmol/L, reaction temperature of 30°C, reaction time of 120 min, and the concentration of SCN-, TOC and CN-of effluent is 3.12mg/L, 3.856 mg/L and 0.936 mg/L respectively.The concentration of CN-is 0.134 mg/L under H2O25 mmol/L meeting the emission standard of pollutants for coking chemical industry (GB 16171-2012).Additionally, the nitrogen element is rarely converted to NO3-and NO2-, but converted to other forms of nitrogen, and sulfur element is converted to SO42-.%研究不同条件下紫外光催化H2O2降解SCN-的效果.结果表明,在光照强度9.94 mW/cm2,p H值为7,H2O2浓度2.25 mmol/L,温度30°C,反应时间120 min的条件下,100 mg/L SCN-基本得到降解,SCN-去除率为96.88％,出水中残余的SCN-,TOC和CN-质量浓度分别为3.12 mg/L,3.856 mg/L和0.936mg/L.H2O25 mmol/L,出水中CN-质量浓度为0.134 mg/L,能满足新的炼焦化学工业污染物排放标准(GB16171-2012).紫外光催化H2O2降解SCN-过程中氮元素很少转化为NO3-和NO2,主要转化为CN-和NH4+-N;硫经降解生成SO42-.
