Abstract
Under the condition of keeping certain acidity, the pretreatment efficiency of an acid chemical wastewater (pH 0.85) by electrochemical oxidation was compared with that by ozonation. The results showed that the electrochemical oxidation pretreatment could obtain a better result than the ozonation at pH 0.85. After the addition of 2 g·L-1 NaCl and with the electrochemical oxidation pretreatment at 30 mA·cm-2, the removal rate of chemical oxygen demand (CODCr) reached 43.4%, and the value of biochemical oxygen demand/chemical oxygen demand (BOD5/CODCr) also increased from 0.034 to 0.14 in 20 minutes, indicating significantly improvement in the biodegradability of the wastewater. However, the ozonation alone had a low pretreatment efficiency at pH 0.85, and could only become as effective as those done by the electrochemical oxidation pretreatment at pH 7.0. A ozone-based advanced oxidation technology, Ti(Ⅳ)/O3/H2O2, was also relatively effective at pH 2.85. The value of 22.9% for the removal rate of CODCr could be obtained and the value of BOD5/CODCr went up from 0.034 to 0.072 in 16 min.
Graphical Abstract
Keywords
electrochemical oxidation, ozonation, advanced oxidation technology, titanium ion, acid chemical wastewater
Publication Date
2013-10-28
Online Available Date
2013-03-18
Revised Date
2013-03-18
Received Date
2012-12-25
Recommended Citation
Han-shui LIU, su YU, Shao-ping TONG, Chun-an MA.
A Comparative Study in Pretreatments of Acid Chemical Wastewater by Electrochemical Oxidation and Ozonation[J]. Journal of Electrochemistry,
2013
,
19(5): 472-476.
DOI: 10.61558/2993-074X.2138
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol19/iss5/11
References
[1]Gao M P, Zeng Z Q, Sun B C, et al. Ozonation of azo dye Acid Red 14 in a microporous tube-in-tube microchannel reactor: decolorization and mechanism[J]. Chemosphere, 2012, 89(2): 190-197.
[2]Parsa B J, Negahdar S H. Treatment of wastewater containing Acid Blue 92 dye by advaced ozone-based oxidation methods[J]. Separation and Purification Technology, 2012, 98(19): 315-320.
[3]Swaminathan K, Sandhya S, Pachhade K, et al. Decolorization and degradation of H-acid and other dyes using ferrous-hydrogen peroxide system[J]. Chemosphere, 2003, 50(5): 619-625.
[4]Rivas F J, Frades J, Buxeda P, et al. Oxidation of p-hydroxybenzoic acid by Fenton’s reagent[J]. Water Research, 2001, 35(2): 387-396.
[5]Aquino J M, Romeu C, Rocha F, et al. Electrochemical degradation of the Acid Blue 62 dye on a β-PbO2 anode assessed by the response surface methodology[J]. Journal of Applied Electrochemistry, 2012, 40(10): 1751-1757.
[6]Zhang X D, Hao J D, Li W S, et al. Synergistic effect in treatment of C.I. Acid Red 2 by electrocoagulation and electrooxidation[J]. Journal of Hazardous Materials, 2009, 170(2/3): 883-887.
[7]Wang A M, Qu J H, Lin H J, et al. Degradation of azo dye Acid Red 14 aqueous solution by electrokinetic and electrooxidation process[J]. Chemosphere, 2004, 55(9): 1189-1196.
[8]Wu Z M(吴志敏), Wei C H(韦朝海), Wu C F(吴超飞). Treatment of Acid Red B-containing water by wet peroxide oxidation[J]. Acta Scientiae Circumstantiae（环境科学学报），2004, 24(5): 809-814.
[9]Mu Y, Yu H Q, Zheng J C, et al. Reductive degradation of nitrobenzene in aqueous solution by zero-valent iron[J]. Chemosphere, 2004, 54(7): 789-794.
[10]Tong S P, Ma C A, Fei H. A novel PbO2 electrode preparation and its application in organic degradation[J]. Electrochimica Acta, 2008, 53(6): 3002-3006.
[11]Zhang T M(张铁明), Wang X H(王勋华), Tong S P(童少平), et al. Preparation of La2O3 doped β-PbO2 electrode in electrochemical degradation of organic[J]. CIESC Journal(化工学报), 2008, 59(S1): 64-69.
[12]Tong S P, Zhao S Q, Lan X F, et al. A kinetic model of Ti(Ⅳ)-catalyzed H2O2/O3 process in aqueous solution[J]. Journal of Environmental Science, 2011, 23(12): 2087-2092.
[13]Zhang H(张华), Shi R(石锐), Tong S P(童少平), et al. CuO-Ru/Al2O3 catalytic ozonation of a cetophenone in water[J]. Environmental Science(环境科学), 2010, 31(3) : 715-719.
[14]Wei F S(魏复盛), Qi W Q(齐文启). Analytical methods water and wastewater 4rd ed[M]. . Beijing: China Environment Science Press(中国环境科学出版社), 1998: 211-213.
[15]Pires M, Carvalho L R. An artifact in air carbonyls sampling using C18DNPH-coated cartridge[J]. Analytica Chimica Acta, 1998, 367(1/3): 223-231.
[16]Bader H, Hoigné J. Determination of ozone in water by the indigo method[J]. Water Research, 1981, 15(4): 449-456.
[17]Mohan N, Balasubramanian N, Ahmed B C. Electrochemical oxidation of textile wastewater and its reuse[J]. Journal of hazardous materials, 2007, 147(1/2): 644-651.
[18]Raghu S, Chang W L, Chellammal S, et al. Evaluation of electrochemical oxidation techniques for degradation of dye effluents—A comparative approach[J]. Journal of hazardous materials. 2009, 171(1): 748-754.
[19]Santos I D, Afonso J C, Dutra A J. Behavior of a Ti/RuO2 anode in concentrated chloride medium for phemol and their chlorinated intermediates electrooxidation[J]. Separation and Purification Technology, 2010, 76(12): 151-157.
[20]Hoigne J. Mechanisms, rate and selectivities of oxidation of organic compounds initiated by ozonation of water[J]. Ozone Technology and its Practical Applications, 1982, 16(3): 341-379.
[21]Hoigne J, Bader H. Rate constants of reactions of ozone with organic and inorganic compounds in water-Ⅱ: Dissociating organic compounds[J]. Water Research, 1983, 17(2): 185-194.
[22]Hiroshi T, Hiroshi F, Gilbert G. Kinetics and mechanism of ozone decomposition in basic aqueous solution[J]. Inorganic Chemistry, 1985, 24(19): 2962-2966.
[23]Li W W(李文文), Liu P P(刘朋朋), Zhang H(张华), et al. Degradation of acetic by Ti(Ⅳ)-catalyzed H2O2/O3[J]. CIESC Journal, 2010, 61(7): 1790-1795.
[24]Cao X Z(曹锡章), Song T Y(宋天佑), Wang X Q(王杏乔). Inorganic Chemistry 3rd ed(无机化学)[M]. Beijing: Higher Education Press(高等教育出版社), 1994: 939-940.
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