黄铁矿活化过硫酸钠降解丁基黄药

利用黄铁矿活化过硫酸钠降解丁基黄药,并探讨了黄铁矿用量、pH、过硫酸钠浓度、共存离子等因素对丁基黄药降解的影响。结果表明:(1)黄铁矿可有效活化过硫酸钠实现丁基黄药的高效降解。(2)在丁基黄药初始质量浓度为140mg/L、黄铁矿用量为1.0g/L、过硫酸钠质量浓度为0.080g/L、pH=6.00、降解120min时,丁基黄药降解率高达98.50%。(3)黄铁矿活化过硫酸钠降解丁基黄药的进程中,硫酸根自由基(SO_4^-·)和羟基自由基(·OH)共同作用导致丁基黄药的降解,而SO_4^-·起主要作用。(4)丁基黄药降解率随黄铁矿用量、过硫酸钠浓度的增大而增大,随pH的增大而减小。(5)Cl^-和HCO_3^-对丁基黄药的降解有明显的抑制作用,并且HCO3-的抑制作用更强。

Degradation of butyl xanthate by sodium persulfate activated with pyrite

Batch experiments were used to investigate butyl xanthate degradation by sodium persulfate(PS)activated with pyrite.The impact factors including pyrite dosage,pH,PS concentration and coexisting ions were investigated.The results indicated that:(1)butyl xanthate could be efficiently degraded by PS activated with pyrite.(2)Butyl xanthate degradation efficiency was 98.50% within 120 min for butyl xanthate concentration of 140 mg/L ,pyrite dosages of 1.0 g/L ,PS concentration of 0.080 g/L and pH of 6.00.(3)Both SO4^-· and ·OH were involved in the degradation of butyl xanthate in the system,and SO4^-· played a dominant role.(4)The degradation efficiency of butyl xanthate increased with increasing pyrite dosage and PS concentration,but decreasing pH.(5)The presence of Cl^-and HCO3^-had a significant inhibitory effect on butyl xanthate degradation,and inhibitory effect of Cl^-was higher than that of HCO3^-.