铁碳微电解/H_2O_2耦合工艺预处理水中砷的研究
|
摘要
采用铁碳微电解/H_2O_2耦合工艺预处理水溶液中砷,研究了溶液初始p H、铁碳球投加量、曝气流量、H_2O_2投加量、反应温度和初始总砷(TAs)浓度等因素对砷去除效果的影响﹒结果表明,在铁碳微电解体系中加入H_2O_2能明显提高水溶液中TAs和三价砷(As(Ⅲ))去除率﹒当溶液初始TAs和As(Ⅲ)浓度分别为539 mg/L和368 mg/L,溶液初始pH为2.5,铁碳球投加量为530 g/L,曝气流量为60 m L/min,H_2O_2投加量为2 m L,在15℃下曝气反应1 h时,溶液中TAs和As(Ⅲ)去除率分别达到61.94%和55.06%;然而,未加H_2O_2,在同样条件下处理,TAs和As(Ⅲ)去除率分别为47.07%和41.97%﹒
The iron-carbon microelectrolysis/H_2O_2 coupled method was applied in the pretreatment of arsenic from aqueous solution. The effects of factors such as initial p H of the solution, iron carbon ball dosage, aeration flow, H_2O_2 dosage, reaction temperature and initial TAs concentration on the removal rates of arsenic were investigated. The results show that the removal rates of TAs and As(Ⅲ) can be improved obviously by adding H_2O_2 to the iron-carbon microelectrolysis system. When the concentrations of TAs and As(Ⅲ) are 539 and 368 mg/L, respectively in the aqueous solution, the initial pH is 2.5, the dosage of iron carbon ball is 530 g/L, airflow is 60 m L/min, after microelectrolysis at 15 ℃ for 1 h,the removal rates of TAs and As(Ⅲ) are 61.94% and 55.06%, respectively, while without adding H_2O_2 in the aqueous solution, under the same conditions, the removal rates of TAs and As(Ⅲ) are 47.07% and 41.97%, respectively.
The iron-carbon microelectrolysis/H_2O_2 coupled method was applied in the pretreatment of arsenic from aqueous solution. The effects of factors such as initial p H of the solution, iron carbon ball dosage, aeration flow, H_2O_2 dosage, reaction temperature and initial TAs concentration on the removal rates of arsenic were investigated. The results show that the removal rates of TAs and As(Ⅲ) can be improved obviously by adding H_2O_2 to the iron-carbon microelectrolysis system. When the concentrations of TAs and As(Ⅲ) are 539 and 368 mg/L, respectively in the aqueous solution, the initial pH is 2.5, the dosage of iron carbon ball is 530 g/L, airflow is 60 m L/min, after microelectrolysis at 15 ℃ for 1 h,the removal rates of TAs and As(Ⅲ) are 61.94% and 55.06%, respectively, while without adding H_2O_2 in the aqueous solution, under the same conditions, the removal rates of TAs and As(Ⅲ) are 47.07% and 41.97%, respectively.
引文
[1]LI S L,WANG W,LIU Y Y,et al.Zero-valent iron nanoparticles(n ZVI)for the treatment of smelting wastewater:A pilot-scale demonstration[J].Chemical Engineering Journal,2014,254:115-123.
[2]吴烈善,邓玮.含砷废水治理方法的研究进展[J].广西科学院学报,2011,27(2):172-174.
[3]彭映林,肖斌.两级中和-铁盐沉淀法处理高砷废水[J].工业水处理,2016,36(6):64-68.
[4]WANG H J,GONG W X,LIU R P,et al.Treatment of high arsenic content wastewater by a combined physical–chemical process[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2011,379(1-3):116-120.
[5]郑雅杰,张胜华,龚昶.含砷污酸资源化回收铜和砷的新工艺[J].中国有色金属学报,2013,23(10):2985-2992.
[6]石中亮,刘丙柱,姚淑华.活性水合氧化铁对水中砷(V)的去除[J].沈阳化工大学学报,2010,24(1):7-11.
[7]LIZAMA A K,FLETCHER T D,SUN G Z.Removal processes for arsenic in constructed wetlands.[J].Chemosphere,2011,84(8):1032-1043.
[8]SINGH R,SINGH S,PARIHAR P,et al.Arsenic contamination,consequences and remediation techniques:A review[J].Ecotoxicology and Environmental Safety,2015,112:247-270.
[9]边德军,任庆凯,田曦,等.有色金属冶炼含砷铁酸性废水处理工艺设计方案[J].环境科学与技术,2010,33(5):151-153.
[10]潘全,王惠,杨玉娇,等.铁碳微电解处理印染废水的研究[J].湖北大学学报:自然科学版,2011,33(2):165-167.
[11]彭人勇,程宝珍.Fe/C微电解-絮凝沉淀法处理电镀废水中铜的研究[J].环境工程学报,2012,6(2):501-504.
[12]YING D W,XU X Y,LI K,et al.Design of a novel sequencing batch internal micro-electrolysis reactor for treating mature landfill leachate[J].Chemical Engineering Research and Design,2012,90(12):2278–2286.
[13]杨津津,徐晓军,王刚,等.微电解-絮凝耦合技术处理含重金属铅锌冶炼废水[J].中国有色金属学报,2012,22(7):2125-2132.
[14]冯俊丽,马鲁铭.催化铁内电解法处理含铬废水[J].水处理技术,2005,31(7):42-45.
[15]TANG P,DENG C Y,TANG X S,et al.Degradation of p-nitrophenol by interior microelectrolysis of zero-valent iron/copper-coated magnetic carbon galvanic couples in the intermittent magnetic field[J].Chemical Engineering Journal,2012,210:203-211.
[16]石建军,李治国,严家平.强化微电解法预处理氯硝柳胺生产废水的研究[J].安徽建筑工业学院学报:自然科学版,2006,14(3):78-80.
[17]YING D W,PENG J,XU X Y,et al.Treatment of mature landfill leachate by internal micro-electrolysis integrated with coagulation:A comparative study on a novel sequencing batch reactor based on zero valent iron[J].Journal of Hazardous Materials,2012,229-230:426-433.
[18]PENG Y L,ZHENG Y J,ZHOU W K,et al.Separation and recovery of Cu and As during purification of copper electrolyte[J].Transactions of Nonferrous Metals Society of China,2012,22(9):2268-2273.
[19]赵雅光,万俊锋,王杰,等.零价铁(ZVI)去除水中的As(Ⅲ)[J].化工学报,2015,66(2):730-737.
[20]EMETT M T,KHOE G H.Photochemical oxidation of arsenic by oxygen and iron in acidic solutions[J].Water Research,2001,35(3):649-656.
[21]BANG S,KORFIATIS G P,MENG X G.Removal of arsenic from water by zero-valent iron[J].Journal of Hazardous Materials,2005,121(1-3):61-67.
[22]殷旭东,李德豪,毛玉凤,等.氨吹脱+铁碳微电解/H2O2法联合预处理高浓度焦化废水[J].水处理技术,2016,42(5):120-123.
[2]吴烈善,邓玮.含砷废水治理方法的研究进展[J].广西科学院学报,2011,27(2):172-174.
[3]彭映林,肖斌.两级中和-铁盐沉淀法处理高砷废水[J].工业水处理,2016,36(6):64-68.
[4]WANG H J,GONG W X,LIU R P,et al.Treatment of high arsenic content wastewater by a combined physical–chemical process[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2011,379(1-3):116-120.
[5]郑雅杰,张胜华,龚昶.含砷污酸资源化回收铜和砷的新工艺[J].中国有色金属学报,2013,23(10):2985-2992.
[6]石中亮,刘丙柱,姚淑华.活性水合氧化铁对水中砷(V)的去除[J].沈阳化工大学学报,2010,24(1):7-11.
[7]LIZAMA A K,FLETCHER T D,SUN G Z.Removal processes for arsenic in constructed wetlands.[J].Chemosphere,2011,84(8):1032-1043.
[8]SINGH R,SINGH S,PARIHAR P,et al.Arsenic contamination,consequences and remediation techniques:A review[J].Ecotoxicology and Environmental Safety,2015,112:247-270.
[9]边德军,任庆凯,田曦,等.有色金属冶炼含砷铁酸性废水处理工艺设计方案[J].环境科学与技术,2010,33(5):151-153.
[10]潘全,王惠,杨玉娇,等.铁碳微电解处理印染废水的研究[J].湖北大学学报:自然科学版,2011,33(2):165-167.
[11]彭人勇,程宝珍.Fe/C微电解-絮凝沉淀法处理电镀废水中铜的研究[J].环境工程学报,2012,6(2):501-504.
[12]YING D W,XU X Y,LI K,et al.Design of a novel sequencing batch internal micro-electrolysis reactor for treating mature landfill leachate[J].Chemical Engineering Research and Design,2012,90(12):2278–2286.
[13]杨津津,徐晓军,王刚,等.微电解-絮凝耦合技术处理含重金属铅锌冶炼废水[J].中国有色金属学报,2012,22(7):2125-2132.
[14]冯俊丽,马鲁铭.催化铁内电解法处理含铬废水[J].水处理技术,2005,31(7):42-45.
[15]TANG P,DENG C Y,TANG X S,et al.Degradation of p-nitrophenol by interior microelectrolysis of zero-valent iron/copper-coated magnetic carbon galvanic couples in the intermittent magnetic field[J].Chemical Engineering Journal,2012,210:203-211.
[16]石建军,李治国,严家平.强化微电解法预处理氯硝柳胺生产废水的研究[J].安徽建筑工业学院学报:自然科学版,2006,14(3):78-80.
[17]YING D W,PENG J,XU X Y,et al.Treatment of mature landfill leachate by internal micro-electrolysis integrated with coagulation:A comparative study on a novel sequencing batch reactor based on zero valent iron[J].Journal of Hazardous Materials,2012,229-230:426-433.
[18]PENG Y L,ZHENG Y J,ZHOU W K,et al.Separation and recovery of Cu and As during purification of copper electrolyte[J].Transactions of Nonferrous Metals Society of China,2012,22(9):2268-2273.
[19]赵雅光,万俊锋,王杰,等.零价铁(ZVI)去除水中的As(Ⅲ)[J].化工学报,2015,66(2):730-737.
[20]EMETT M T,KHOE G H.Photochemical oxidation of arsenic by oxygen and iron in acidic solutions[J].Water Research,2001,35(3):649-656.
[21]BANG S,KORFIATIS G P,MENG X G.Removal of arsenic from water by zero-valent iron[J].Journal of Hazardous Materials,2005,121(1-3):61-67.
[22]殷旭东,李德豪,毛玉凤,等.氨吹脱+铁碳微电解/H2O2法联合预处理高浓度焦化废水[J].水处理技术,2016,42(5):120-123.