PHOTO-ASSISTED DEGRADATION OF 3-MERCAPTOPROPIONIC ACID BY FENTON REAGENT
Objectives: The main objective of the research were to develop an energy saver, cheaper eco-friendly method for removal of pollutants, because
another process needing a large consumption of energy, time and produce harmful byproducts. This process may used to eliminate toxic and bioresistant
organic and inorganic pollutants through their transformation into harmless species. Thiol compounds are widely used in pharmaceuticals
and agrochemicals. These chemicals has high risk bracket for human health diseases like, corrosive to skin, eyes, respiratory system, chemical burns,
irritation, ulcers etc.
Methods: The Photo-assisted degradation of 3-Mercaptopropionic acid by Fenton reagent has been investigated. The effect of various reaction
parameters such as conc. of substrate, conc. of H2O2, conc. of FeSO4, pH, polarity of solvent and catalyst variation on the rate of photocatalytic process
has been studied.
Results: The control experiments were performed. The reaction was carried out in the presence of Fenton reagent, oxygen and light. Advanced
oxidation processes (AOPs) have proved superiority over the conventional techniques like precipitation, flocculation, filtration, incineration or the
biological pathways. These methods are based on the principle of generation of highly reactive hydroxyl radical, which is capable for destruction of
pollutants. The Photoproduct 3,3â€™-dithiodipropionic acid was characterized by physical, chemical and spectral methods. A tentative mechanism has
been proposed with overall reaction.
Conclusion: This research method is promising and eco-friendly for removal of pollutants from wastewater. The treated water may be used for daily
purpose like irrigation and cleaning etc.
Keywords: Photosensitized oxidation, 3-Mercaptopropionic acid, Fenton and photo-Fenton reagent.
1. Rocha OR, Dantas RF, Duarte MM, Duarte MM, Silva VL. Oil sludge treatment by photocatalysis applying black and white light. Chem Eng J 2010;157:80-5.
2. Dantas RF, Rossiter O, Ribeiro Teixeira AK, SimÃµes AS, da Silva VL. Direct UV photolysis of propranolol and metronidazole in aqueous solution. Clin Eng J 2010;158(2):143-7.
3. Kim JH, Han SJ, Kim SS, Yang JW. Effect of soil chemical properties on the remediation of phenanthrene-contaminated soil by electrokinetic-Fenton process. Chemosphere 2006;63(10):1667-76.
4. Canepa P, Cauglia F, Caviglia P, Chelossi E. Photo-Fenton oxidation of oil mill waste water: Chemical degradation and biodegradability increase. Environ Sci Pollut Res Int 2003;10(4):217-20.
5. Lau IW, Wang P, Chiu SS, Fang HH. Photo-assisted fenton oxidation of refractory organics in UASB-pretreated leachate. J Environ Sci (China) 2002;14(3):388-92.
6. Liou MJ, Lu MC, Chen JN. Oxidation of explosives by Fenton and photo-Fenton processes. Water Res 2003;37(13):3172-9.
7. Chacon JM, Leal MT, Sanchez M, Bandala RR. Solar photocatalytic degradation of azo-dyes by photo-Fenton process. Dyes Pigm 2006;69(3):144-50.
8. Lucas MS, Peres JA. Decolorization of the azo dye reactive black 5 by Fenton and photo-Fenton oxidation. Dyes Pigm 2006;71(3):236-44.
9. Murugaganandham M, Swaminathan M. Decolourisation of reactive orange 4 by Fenton and photo-Fenton oxidation technology. Dyes Pigm 2004;63(3):315-21.
10. Burrows HD, Canle LM, Santaballa JA, Steenken S. Reaction pathways and mechanisms of photodegradation of pesticides. J Photochem Photobiol B 2002;67(2):71-108.
11. Acero JL, Benitez FJ, Gonzalez M, Benitez R. Kinetics of fenuron decomposition by single â€“ Chemical oxidants and combined system. Ind Eng Chem Res 2002;41(17):4225-32.
12. Lin SH, Lin CM, Leu HG. Operating characteristics of kinetic studies of surfactants wastewater treatment by Fenton oxidation. Water Res 1999;33:1735.
13. Visnoi NK. Advanced Practical Organic Chemistry. 2nd Revised ed. New Delhi: Vikas Publishing Pvt. Ltd.; 2000.
14. Vogel AL. Text Book of Practical Organic Chemistry. 4th ed. London: ELBS Publishing; 1978.
15. Feigel F. Spot Test Inorganic Analysis. Amsterdam, London, New York: Elsevier; 1966. p. 229.
16. Silverstein RM, Webster FX. Spectrometric Identification of Organic Compounds.6th ed. New York: John Willey and Sons; 1998.
17. Williams DH, Fleming I. Spectroscopic Methods in Organic Chemistry. 4th ed. New Delhi: Tata McGraw Hill; 1990.
18. Sychev AY, Isak VG. Iron compounds and the mechanism of the
Asian J Pharm Clin Res, Vol 8, Issue 4, 2015, 324-327
homogenous catalysis of the activation of O2 and H2O2 and of the activation of organic substrates. Russ Chem Rev 1995;64(12):1105.
19. Walling C. Fentonâ€™s reagent revisited. Acc Chem Res 1975;8(4):125â€‘31.
20. Laat JD, Gallard H. Catalytic decomposition of hydrogen peroxide by Fe (III) in homogenous aqueous solution: Mechanism and kinetic modeling. Environ Sci Tech 1999;33(16):2726-32.
21. Sun JH, Sun SP, Fan MH, Guo HQ, Qiao LP, Sun RX. A kinetic study on the degradation of p-nitroaniline by Fenton oxidation process. J Hazard Mater 2007;148(1-2):172-7.
The publication is licensed under CC By and is open access. Copyright is with author and allowed to retain publishing rights without restrictions.