Effect of chloride ions on degradation of Orange G with peroxymonosulfate activated by carbon nanotubes
ZHANG Li-ming1, CHEN Jia-bin1, FANG Cong1, ZHOU Lu1, HU Jin-mei1, HAO Shang-bin1, LI Wen-wei2, WANG Zhong-ming1, HUANG Tian-yin1
1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;
2. School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
The radical was formed by the carbon nanotube (CNT) activation of peroxymonosulfate (PMS). Effect of chloride ion (Cl-) on degradation of Orange G (OG) by CNT/PMS system were investigated. Cl- had a dual effect on OG decolorization in the CNT/PMS system. Low dosage of Cl- could inhibit OG decolorization, whereas high dosage could promote its decolorization. Meanwhile, Cl- could directly react with PMS alone to decolorize OG. In the CNT/PMS/Cl- system, effect of various factors were explored, including PMS dosage, reaction temperature, initial concentration of OG, Cl- concentration, and initial pH, and the degradation mechanism was further proposed. The results indicated that 100% decolorization of OG was observed after 25min when 1.6mmol/L of PMS, 0.08mmol/L of OG, 50mmol/L of Cl- were present at 25℃. The activation energy of reaction system was determined to be 88.45kJ/mol. With the increasing initial pH, OG decolorization was decreased first and then gradually increased. Both of SO4-·and HOCl were found to be responsible for OG degradation. The mineralization rate during the degradation of OG were analyzed, and higher mineralization rate was observed when CNT was present in the system. From the analysis of UV-vis spectra and GC-MS, the azo band and naphthaline ring of OG were destroyed to generate other small intermediates.
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[1]
Saratale R G,Saratale G D,Chang J S,et al.Bacterial decolorization and degradation of azo dyes:A review[J].Journal of the Taiwan Institute of Chemical Engineers,2011,42(1):138-157.
[2]
Chen K,Wu J,Huang C,et al.Decolorization of azo dye using PVA-immobilized microorganisms[J].Journal of Biotechnology,2003,101(3):241-252.
[3]
Zhang F,Feng C P,Li W Q,et al.Indirect Electrochemical Oxidation of Dye Wastewater Containing Acid Orange 7Using Ti/RuO2-Pt Electrode[J].International Journal of Electrochemical Science,2014,9(2):943-954.
[4]
Gupta V K,Gupta B,Rastogi A,et al.A comparative investigation on adsorption performances of mesoporous activated carbon prepared from waste rubber tire and activated carbon for a hazardous azo dye-Acid Blue 113[J].Journal of Hazardous Materials,2011,186(1):891-901.
[5]
Papic S,Koprivanac N,Lončarić Božić A,et al.Removal of some reactive dyes from synthetic wastewater by combined Al (Ⅲ) coagulation/carbon adsorption process[J].Dyes and Pigments,2004,62(3):291-298.
[6]
Yang C,Mcgarrahan J.Electrochemical coagulation for textile effluent decolorization[J].Journal of Hazardous Materials,2005,127(1-3):40-47.
[7]
Ellouze E,Ellouze D,Jrad A,et al.Treatment of synthetic textile wastewater by combined chemical coagulation/membrane processes[J].Desalination and Water Treatment,2011,33(1-3):118-124.
[8]
Saleh T A,Gupta V K.Photo-catalyzed degradation of hazardous dye methyl orange by use of a composite catalyst consisting of multi-walled carbon nanotubes and titanium dioxide[J].Journal of Colloid and Interface Science,2012,371(1):101-106.
[9]
Khataee A R,Pons M N,Zahraa O.Photocatalytic degradation of three azo dyes using immobilized TiO2nanoparticles on glass plates activated by UV light irradiation:Influence of dye molecular structure[J].Journal of Hazardous Materials,2009,168(1):451-457.
[10]
Cuiping B,Xianfeng X,Wenqi G,et al.Removal of rhodamine B by ozone-based advanced oxidation process[J].Desalination,2011,278(1-3):84-90.
[11]
Shi P,Dai X,Zheng H,et al.Synergistic catalysis of Co3O4 and graphene oxide on Co3O4/GO catalysts for degradation of Orange Ⅱ in water by advanced oxidation technology based on sulfate radicals[J].Chemical Engineering Journal,2014,240:264-270.
[12]
George C,Chovelon J.A laser flash photolysis study of the decay of SO4-and Cl2-radical anions in the presence of Cl-in a queous solutions[J].Chemosphere,2002,47(4):385-393.
[13]
Liang C,Liang C,Chen C.pH dependence of persulfate activation by EDTA/Fe (Ⅲ) for degradation of trichloroethylene[J].Journal of Contaminant Hydrology,2009,106(3/4):173-182.
[14]
Liang C,Lin Y,Shih W.Treatment of trichloroethylene by adsorption and persulfate oxidation in batch studies[J].Industrial&Engineering Chemistry Research,2009,48(18):8373-8380.
[15]
Anipsitakis G P,Dionysiou D D.Transition metal/UV-based advanced oxidation technologies for water decontamination[J].Applied Catalysis B:Environmental,2004,54(3):155-163.
[16]
He X,de la Cruz A A,Dionysiou D D.Destruction of cyanobacterial toxin cylindrospermopsin by hydroxyl radicals and sulfate radicals using UV-254nm activation of hydrogen peroxide,persulfate and peroxymonosulfate[J].Journal of Photochemistry and Photobiology A:Chemistry,2013,251:160-166.
[17]
Huang K,Zhao Z,Hoag G E,et al.Degradation of volatile organic compounds with thermally activated persulfate oxidation[J].Chemosphere,2005,61(4):551-560.
[18]
Waldemer R H,Tratnyek P G,Johnson R L,et al.Oxidation of chlorinated ethenes by heat-activated persulfate:Kinetics and products[J].Environmental Science&Technology,2007,41(3):1010-1015.
[19]
Liang C,Bruell C J.Thermally activated persulfate oxidation of trichloroethylene:Experimental investigation of reaction orders[J].Industrial&Engineering Chemistry Research,2008,47(9):2912-2918.
[20]
Li B,Li L,Lin K,et al.Removal of 1,1,1-trichloroethane from aqueous solution by a sono-activated persulfate process[J].Ultrasonics Sonochemistry,2013,20(3):855-863.
[21]
Chen W,Su Y.Removal of dinitrotoluenes in wastewater by sono-activated persulfate[J].Ultrasonics Sonochemistry,2012,19(4):921-927.
[22]
Liang C,Bruell C J,Marley M C,et al.Persulfate oxidation for in situ remediation of TCE.Ⅱ.Activated by chelated ferrous ion[J].Chemosphere,2004,55(9):1225-1233.
[23]
Anipsitakis G P,Dionysiou D D.Degradation of organic contaminants in water with sulfate radicals generated by theconjunction of peroxymonosulfate with cobalt[J].Environmental Science&Technology,2003,37(20):4790-4797.
[24]
Yang S,Yang X,Shao X,et al.Activated carbon catalyzed persulfate oxidation of Azo dye acid orange 7at ambient temperature[J].Journal of Hazardous Materials,2011,186(1):659-666.
[25]
Zhang J,Shao X,Shi C,et al.Decolorization of Acid orange 7with peroxymonosulfate oxidation catalyzed by granular activated carbon[J].Chemical Engineering Journal,2013,232:259-265.
[26]
Yang S,Xiao T,Zhang J,et al.Activated carbon fiber as heterogeneous catalyst of peroxymonosulfate activation for efficient degradation of Acid orange 7in aqueous solution[J].Separation and Purification Technology,2015,143:19-26.
[27]
Serp P,Corrias M,Kalck P.Carbon nanotubes and nanofibers in catalysis[J].Applied Catalysis A:General,2003,253(2):337-358.
[28]
Muthukumar M,Selvakumar N.Studies on the effect of inorganic salts on decolouration of acid dye effluents by ozonation[J].Dyes and Pigments.2004,62(3):221-228.
Wang P,Yang S,Shan L,et al.Involvements of chloride ion in decolorization of Acid Orange 7by activated peroxydisulfate or peroxymonosulfate oxidation[J].J.Environ.Sci.(China),2011,23(11):1799-1807.
[31]
Liang C,Wang Z,Bruell C J.Influence of pH on persulfate oxidation of TCE at ambient temperatures[J].Chemosphere.2007,66(1):106-113.
[32]
Deborde M,von Gunten U.Reactions of chlorine with inorganic and organic compounds during water treatment-Kinetics and mechanisms:A critical review[J].Water Research,2008,42(1/2):13-51.
[33]
Lou X,Guo Y,Xiao D,et al.Rapid dye degradation with reactive oxidants generated by chloride-induced peroxymonosulfate activation[J].Environ.Sci.Poll.Res.2013,20(9):6317-6323.
[34]
Zhou Y,Jiang J,Gao Y,et al.Activation of peroxymonosulfate by Benzoquinone:A novel nonradical oxidation process[J].Environmental Science&Technology,2015,49(21):12941-12950.
[35]
El-Ghenymy A,Centellas F,Garrido J A,et al.Decolorization and mineralization of Orange G azo dye solutions by anodic oxidation with a boron-doped diamond anode in divided and undivided tank reactors[J].Electrochimica Acta,2014,130:568-576.
[36]
Yang S,Xiao T,Zhang J,et al.Activated carbon fiber as heterogeneous catalyst of peroxymonosulfate activation for efficient degradation of Acid Orange 7in aqueous solution[J].Separation&Purification Technology.,2015,143:19-26.
