黄铁矿活化过硫酸钠降解丁基黄药
|
摘要
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。
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 120min for butyl xanthate concentration of 140mg/L,pyrite dosages of 1.0g/L,PS concentration of 0.080g/L and pH of 6.00.(3)Both SO_4~-·and·OH were involved in the degradation of butyl xanthate in the system,and SO_4~-·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 HCO_3~-had a significant inhibitory effect on butyl xanthate degradation,and inhibitory effect of Cl~-was higher than that of HCO_3~-.
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 120min for butyl xanthate concentration of 140mg/L,pyrite dosages of 1.0g/L,PS concentration of 0.080g/L and pH of 6.00.(3)Both SO_4~-·and·OH were involved in the degradation of butyl xanthate in the system,and SO_4~-·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 HCO_3~-had a significant inhibitory effect on butyl xanthate degradation,and inhibitory effect of Cl~-was higher than that of HCO_3~-.
引文
[1]陈绍华,龚文琪,梅光军,等.烃基黄药捕收剂的生物降解性评价[J].中南大学学报(自然科学版),2011,42(2):546-554.
[2]CUI K X,HE Y H,JIN S M.Enhanced UV-visible response of bismuth subcarbonate nanowires for degradation of xanthate and photocatalytic reaction mechanism[J].Chemosphere,2016,149:245-253.
[3]TAN C Q,GAO N Y,CHU W H,et al.Degradation of diuron by persulfate activated with ferrous ion[J].Separation and Purification Technology,2012,95:44-48.
[4]李旭伟,张亚,王国庆,等.热活化过硫酸盐降解水体中毒死蜱[J].环境化学,2016,35(10):2089-2095.
[5]ACERO J L,BENITE F J,REAL F J,et al.Degradation of selected emerging contaminants by UV-activated persulfate:kinetics and influence of matrix constituents[J].Separation and Purification Technology,2018,201:41-50.
[6]ANIPSITAKIS G P,DIONYSIOU D D.Radical generation by the interaction of transition metals with common oxidants[J].Environmental Science&Technology,2004,38(13):3705-3712.
[7]刘桂芳,孙亚全,陆洪宇,等.活化过硫酸盐技术的研究进展[J].工业水处理,2012,32(12):6-10.
[8]朱维晃,王宏伟,刘文奇.对苯醌活化过硫酸盐降解罗丹明B的动力学特征及其影响因素[J].中国环境科学,2016,36(6):1732-1737.
[9]ZHANG Y Q,TRAN H P,DU X D,et al.Efficient pyrite activating persulfate process for degradation of p-chloroaniline in aqueous systems:a mechanistic study[J].Chemical Engineering Journal,2017,308:1112-1119.
[10]邓靖,徐盼琦,倪永炯,等.黄铁矿活化过硫酸钠降解水中卡马西平[J].水处理技术,2016,42(4):35-36.
[11]WU X L,GU X G,LU S G,et al.Strong enhancement of trichloroethylene degradation in ferrous ion activated persulfate system by promoting ferric and ferrous ion cycles with hydroxylamine[J].Separation and Purification Technology,2015,147:186-193.
[12]马京帅,吕文英,刘国光,等.热活化过硫酸盐降解水中的普萘洛尔[J].环境化学,2017,36(2):221-228.
[13]OH S Y,KANG S G,KIM D W,et al.Degradation of 2,4-dinitrotoluene by persulfate activated with iron sulfides[J].Chemical Engineering Journal,2011,172:641-646.
[14]CHEN H,ZHANG Z L,FENG M B,et al.Degradation of 2,4-dichlorophenoxyacetic acid in water by persulfate activated with FeS(mackinawite)[J].Chemical Engineering Journal,2017,313.
[15]WEI X Y,GAO N Y,LI C,J et al.Zero-valent iron(ZVI)activation of persulfate(PS)for oxidation of bentazon in water[J].Chemical Engineering Journal,2016,285:660-670.
[2]CUI K X,HE Y H,JIN S M.Enhanced UV-visible response of bismuth subcarbonate nanowires for degradation of xanthate and photocatalytic reaction mechanism[J].Chemosphere,2016,149:245-253.
[3]TAN C Q,GAO N Y,CHU W H,et al.Degradation of diuron by persulfate activated with ferrous ion[J].Separation and Purification Technology,2012,95:44-48.
[4]李旭伟,张亚,王国庆,等.热活化过硫酸盐降解水体中毒死蜱[J].环境化学,2016,35(10):2089-2095.
[5]ACERO J L,BENITE F J,REAL F J,et al.Degradation of selected emerging contaminants by UV-activated persulfate:kinetics and influence of matrix constituents[J].Separation and Purification Technology,2018,201:41-50.
[6]ANIPSITAKIS G P,DIONYSIOU D D.Radical generation by the interaction of transition metals with common oxidants[J].Environmental Science&Technology,2004,38(13):3705-3712.
[7]刘桂芳,孙亚全,陆洪宇,等.活化过硫酸盐技术的研究进展[J].工业水处理,2012,32(12):6-10.
[8]朱维晃,王宏伟,刘文奇.对苯醌活化过硫酸盐降解罗丹明B的动力学特征及其影响因素[J].中国环境科学,2016,36(6):1732-1737.
[9]ZHANG Y Q,TRAN H P,DU X D,et al.Efficient pyrite activating persulfate process for degradation of p-chloroaniline in aqueous systems:a mechanistic study[J].Chemical Engineering Journal,2017,308:1112-1119.
[10]邓靖,徐盼琦,倪永炯,等.黄铁矿活化过硫酸钠降解水中卡马西平[J].水处理技术,2016,42(4):35-36.
[11]WU X L,GU X G,LU S G,et al.Strong enhancement of trichloroethylene degradation in ferrous ion activated persulfate system by promoting ferric and ferrous ion cycles with hydroxylamine[J].Separation and Purification Technology,2015,147:186-193.
[12]马京帅,吕文英,刘国光,等.热活化过硫酸盐降解水中的普萘洛尔[J].环境化学,2017,36(2):221-228.
[13]OH S Y,KANG S G,KIM D W,et al.Degradation of 2,4-dinitrotoluene by persulfate activated with iron sulfides[J].Chemical Engineering Journal,2011,172:641-646.
[14]CHEN H,ZHANG Z L,FENG M B,et al.Degradation of 2,4-dichlorophenoxyacetic acid in water by persulfate activated with FeS(mackinawite)[J].Chemical Engineering Journal,2017,313.
[15]WEI X Y,GAO N Y,LI C,J et al.Zero-valent iron(ZVI)activation of persulfate(PS)for oxidation of bentazon in water[J].Chemical Engineering Journal,2016,285:660-670.