Photocatalytic degradation of malachite green in aqueous solution using TiO2 nanocatalyst

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Research Paper 01/10/2014
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Photocatalytic degradation of malachite green in aqueous solution using TiO2 nanocatalyst

Omid Bibak, Majid Aliabadi
J. Bio. Env. Sci.5( 4), 301-310, October 2014.
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The main objective of this work was to study the degradation of the Malachite Green (MG) in aqueous solution by using titanium dioxide as a photocatalyst in a Multi-tube photoreactor. The effects of operating conditions such as initial substrate concentration, catalyst loading, pH value, inorganic salts and light intensity on the removal efficiency were evaluated. The apparent first-order rate constants (kap) were used to evaluate the degradation efficiency of MG. The optimum conditions were evaluated with initial concentration ranging from 5-50 mg/L, and TiO2 dosing ranging from 0.05-1.0 g/L in the presence of three UV-C lamps. The optimum condition was found to be 0.1 g/L of TiO2 and 10 mg/L of MG at pH=5. However, the presence of HCO3- anion leads to an increase in the effectiveness of the photocatalytic degradation. Results showed considerable reductions of MG concentration using UV/TiO2 process. Finally, this process compared with UV/H2O2 process. The results of this work proof that photocatalysis is a promising technology to reduce dyestuff (MG) from aqueous solutions.


Abdul Rahman M, Lam SM, Sin JC. 2010. Parameter effect on photocatalytic degradation of phenol using TiO2-P25/activated carbon (AC). Korean Journal of Chemical Engineering 27(4), 1109-1116.

Anbia M, Ghaffari A. 2011. Removal of Malachite Green from Dye Wastewater Using Mesoporous Carbon Adsorbent. Journal of the Iranian chemical society 8, 67-76.

Aravindhan R, Fathima NN, Rao JR, Nair BU. 2006. Wet oxidation of acid brown dye by hydrogen peroxide using heterogeneous catalyst Mn–salen–Y zeolite: A potential catalyst. Journal of Hazardous Materials 138, 152-159.

Ascari F, Bellobono IR, Tozzi PM. 2003. Kenetic modeling of plant photo mineralization of aqueous cibacron CR as model molecule of industrial azo dyes on titanium dioxide-immobilizing membbranes. Fresenius Environmental Bulletin 12(10), 1195-1201.

Behnajady MA,  Modirshahla  N,  Shokri  M. 2004. Photo-destruction of Acide orange 7 (AO7) in aqueous solutions by UV/H2O2: Influence of operational parameters. Chemosphere 55, 129-134.

Cassano AE, Alfano OM. 2000. Reaction engineering of suspended solid heterogeneous photocatalytic reactors. Catalysis Today 58, 167-197.

Daneshvar N, Salari D, Niaei A, Rasoulifard MH, Khataee A. 2005. Immobilization of TiO2 nanopowder on glass beads for the photocatalytic decolorization of an azo dye C.I. directred 23. Journal of Environmental Science and Health 40(8), 1605-1617.

Fernandez I, De Las Nieves FJ, Malato S. 2000. Titanium dioxide/electrolyte solution interface: electron transfer phenomena. Journal of Colloid and Interface Science 227, 510-516.

Garg VK, Amita M, Kumar R, Gupta R. 2004. Basic dye (methylene blue) removal from simulated wastewater by adsorption using Indian Rosewood sawdust: a timber industry waste. Dyes and Pigments 63(3), 243-50.

Giri RR, Ozaki H, Ota S, Taniguchi S, Takanami R. (2010) Influence of inorganic solids on photocatalytic oxidation of 2,4-dichlorophenoxy acetic acid with UV and TiO2 fiber in aqueous solution. Desalination 255, 9-14.

Gogate PR, Pandit AB. 2004. A review of imperative technologies for wastewater treatment I: oxidation technologies at ambient conditions.Advances in Environmental Research 8, 501-551.

Guo YD, Zhang GK, Liu J, Zhang YL. 2013. Finite volume superconvergence approximation for one- dimention singulsrly perturbed problems. RSC Advances 3, 2963-2970.

Gupta VK, Mittal A, Krishnan L, Gajbe V. 2004. Adsorption Kinetics and Column Operations for the Re- moval and Recovery of Malachite Green from Wastewater Using Bottom Ash. Separation and Purification Technology 40(1), 87-96.

Hamed BH, Din ATM, Ahmed AL. 2006. Adsorption of methylene blue onto bamboo-based activated carbon kinetics and equilibrium studies. Journal of Hazardous Materials 7, 43-49.

Hoffmann MR, Martin ST, Choi W, Bahnemann D. 1995. Environmental Applications of Semiconductor Photocatalysis. Chemical Review 95(1), 69-96.

Kartal OE, Erol M, Oguz H. 2001. Photocatalytic destruction of phenol by TiO2 powder. Chemical Engineering & Technology 24, 645-649.

Krysa J, Keppert M, Jirkovsky J, Stengl V, Subrt J. 2004. The effect of thermal treatment on the properties of TiO2 photocatalyst. Materials Chemistry and Physics 86(2), 333-339.

Litter MI. 1999. Heterogeneous Photocatalysis Transition Metal Ions in Photocatalytic Systems. Applied Catalysis B: Environmental 23(2), 89-114.

Liu F, Leung YH, Djurisic AB, Chan WK. 2013. Native defects in ZnO: Effect on dye adsorption and photocatalytic degradation. The Journal of Physical Chemistry C, 117(23), 12218-12228.

OMahony T, Guibal E, Tobin JM. 2002. Reactive dye biosorption by Rhizopusarrhizus biomass. Enzyme and Microbial Technology 31, 456-63.

Oturan MA., Guivarch E, Oturan N, Sires I. 2008. Oxidation pathways of malachite green by Fe3+ catalyzed electro-Fenton process. Applied Catalysis B: Environmental. 82 (3),244-254.

Padmesh TVN, Vijayaraghavan K, Sekaran G, Velan M. 2006. Biosorption of Acid Blue 15 using fresh water macroalgaAzollafiliculoides: batch and column studies. Dyes and Pigments 71(20), 77-82.

Rauf M A, Ashraf SS. 2009. Application of Advanced Oxidation Processes (AOP) to Dye Degradation An Overview, In: Lang AR, Ed., Dyes and Pigments: New Research, Nova Science Publishers, Inc., Hauppauge.

Sagharigar T, Baniasadi B, Ebadi M, Asri M, Aliabadi M. 2014. Photocatalytic discoloration of aqueous phenol red solutions using TiO2 nanocatalyst. Journal of Biodiversity and Environmental Sciences 5(1), 336-342.

Saha S, Wang J M., Pal A. 2012. Nano silver impregnation on commercial TiO2 and a comparative photocatalytic account to degrade malachite green. Separation and Purification Technology 89, 147-159.

Saquib M, Muneer M. 2003 .TiO2-mediated photocatalytic degradation of atriphenyl methane dye (gentian violet), in aqueous suspensions. Dyes and Pigments 56(1), 37-49.

Savitri L, Dipti V, Rakshit A, Pinki BP. 2008. Photocatalytic degradation of Phenol Red using complexes of some transition metals and hydrogen peroxide. Journal of the Serbian Chemical Society 73 (6), 631-639.

Sobana N, Swaminathan M. 2007. The effect of operation parameters on the photocatalytic degradation of Acid Red 18 by ZnO. Separation and Purification Technology 56, 101-107.

Srivastava S, Sinha R, Roy D. 2004. Toxicological effects of Malachite Green. Aquatic Toxicology 66, 319-29.

Wang G, Wu F, Zhang X, Luo M, Deng N. 2006. Enhanced photocatalytic degradation of bisphenol F byβ-Cyclodextrin in aqueous TiO2 dispersion. Fresenius Environmental Bulletin 15(1), 61-67.

Wang Y. 2000. Solar Photocatalytic Degradation of Eight Commercial Dyes in TiO2 Suspension. Water Research 34(3), 990-994.

Yeber MC, Rodriguez J, Freer J, Baeza J, Duran N, Mansilla HD. 1999. Advanced Oxidation of a Pulp Mill Bleaching Wastewater, Chemosphere 39(10), 1679-1683.

Zeng CY, Tian BZ, Zhang JL. 2013. silver halide/silver iodide silver composite with excellent visible light photocatalytic activity for methyl orange degradation. Journal of Colloid and Interface Science 405, 17-21.

Zhang GK, Shen X, Yang YQ. 2011. Facile synthesis of mono disperses porous ZnO spheres by a soluble starch-assisted method and their photocatalytic activity. The Journal of Physical Chemistry C 115, 7145-7152.

Zhang YC, Li J, Zhang M, Dionysiou DD. 2011. Size-tunable hydrothermal synthesis of SnS2 nanocrystals with high performance in visible light-driven photocatalytic reduction of aqueous Cr(VI). Environmental Science & Technology 45, 9324-9331.