Abstract
Introduction
Schwertmannite was synthesized through an oxidation of FeSO4 by Acidithiobacillus ferrooxidans LX5 cell suspension at an initial pH 2.5 and 28°C for 3 days and characterized using X-ray diffraction spectroscopy and scanning electron microscope. The schwertmannite photocatalytic degradation of methyl orange (MO) by oxalate was investigated at different initial pH values, concentrations of schwertmannite, oxalate, and MO.
Results
The results demonstrated that photodegradation of MO in the presence of schwertmannite or oxalate alone was very weak. However, the removal of MO was significantly enhanced when schwertmannite and oxalate coexisted in the reaction system. Low pH (4 or less) was beneficial to the degradation of MO. The optimal doses of schwertmannite and oxalate were 0.2 g L−1 and 2 mM, respectively. Hydroxyl radicals (·OH) and Fe(II), the intermediate products, were also examined during the reaction to explore their correlation with the degradation of MO.
Conclusion
A possible mechanism for the photocatalytic decomposition of MO in the study was proposed. The formation of Fe(III)-oxalate complexes on the surface of schwertmannite was a precursor of H2O2 and Fe(II) production, further leading to the yield of ·OH responsible for the decomposition of MO.
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References
Balmer ME, Sulzberger B (2009) Atrazine degradation in irradiated iron/oxalate systems: effects of pH and oxalate. Environ Sci Technol 33:2418–2424
Bigham JM, Schwertmann U, Carlson L, Murad E (1990) A poorly crystallized oxyhydroxysulfate of iron formed by bacterial oxidation of Fe(II) in acid mine waters. Geochim Cosmochim Acta 54:2743–2758
Bigham JM, Carlson L, Murad E (1994) Schwertmannite, a new iron oxyhydroxy-sulphate from Pyhasalmi, Finland, and other localities. Mineral Mag 58:641–648
Casado J, Fornaguera J, Galán MI (2005) Mineralization of aromatics in water by sunlight-assisted electro-Fenton technology in a pilot reactor. Environ Sci Technol 39:1843–1847
Crini G (2006) Non-conventional low-cost adsorbents for dye removal: a review. Bioresource Technol 97:1061–1085
Faust BC, Zepp RG (1993) Photochemistry of aqueous iron(III)-polycarboxylate complexes: roles in the chemistry of atmospheric and surface waters. Environ Sci Technol 27:2517–2522
Guo J, Du Y, Lan Y, Mao J (2011) Photodegradation mechanism and kinetics of methyl orange catalyzed by Fe(III) and citric acid. J Hazard Mater 186:2083–2088
Gupta VK, Ali I (2008) Removal of endosulfan and methoxychlor from water on carbon slurry. Environ Sci Technol 42:766–770
Gupta VK, Mittal A, Gajbe V, Mittal J (2006) Removal and recovery of the hazardous azo dye acid orange 7 through adsorption over waste materials: bottom ash and de-oiled soya. Ind Eng Chem Res 45:1446–1453
Gupta VK, Ali I, Saini VK (2007a) Adsorption studies on the removal of vertigo blue 49 and orange DNA 13 from aqueous solutions using carbon slurry developed from a waste material. J Colloid Interface Sci 315:87–93
Gupta VK, Jain R, Mittal A, Mathur M, Sikarwar S (2007b) Photochemical degradation of the hazardous dye Safranin-T using TiO2 catalyst. J Colloid Interface Sci 309:464–469
Gupta VK, Carrott PJM, Carrott MMLR, Suhas (2009) Low-cost adsorbents: growing approach to wastewater treatment-a review. Environ Sci Technol 39:783–842
Gupta VK, Gupta B, Rastogi A, Agarwal S, Nayak A (2011a) 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 Hazard Mater 186:891–901
Gupta VK, Jain R, Nayak A, Agarwal S, Shrivastava M (2011b) Removal of the hazardous dye—Tartrazine by photodegradation on titanium dioxide surface. Mater Sci Eng C 31:1062–1067
Gupta VK, Jain R, Agarwal S, Shrivastava M (2011c) Kinetics of photo-catalytic degradation of hazardous dye Tropaeoline 000 using UV/TiO2 in a UV reactor. Colloid Surface A: 378:22–26
Gupta VK, Jain R, Agarwal S, Nayak A, Shrivastava M (2012a) Photodegradation of hazardous dye quinoline yellow catalyzed by TiO2. J Colloid Interface Sci 366:135–140
Gupta VK, Jain R, Mittal A, Saleh TA, Nayak A, Agarwal S, Sikarwar S (2012b) Photo-catalytic degradation of toxic dye amaranth on TiO2/UV in aqueous suspensions. Mater Sci Eng C 32:12–17
Jeong J, Yoon J (2004) Dual roles of CO −·2 for degrading synthetic organic chemicals in the photo/ferrioxalate system. Water Res 38:3531–3540
Jönsson J, Persson P, Sjöberg S, Lövgren L (2005) Schwertmannite precipitated from acid mine drainage: phase transformation, sulphate release and surface properties. Appl Geochem 20:179–191
Karkmaz M, Puzenat E, Guillard C, Herrmann JM (2004) Photocatalytic degradation of the alimentary azo dye amaranth mineralization of the azo group to nitrogen. Appl Catal B: Environ 51:183–194
Lan Q, Li F, Liu C, Li X (2008) Heterogeneous photodegradation of pentachlorophenol with maghemite and oxalate under UV illumination. Environ Sci Technol 42:7918–7923
Li Y, Zhang F (2010) Catalytic oxidation of methyl orange by an amorphous FeOOH catalyst developed from a high iron-containing fly ash. Chem Eng J 158:148–153
Li FB, Li XZ, Li XM, Liu TX, Dong J (2007) Heterogeneous photodegradation of bisphenol A with iron oxides and oxalate in aqueous solution. J Colloid Interface Sci 311:481–490
Li Y, Lu A, Jin S, Wang C (2009) Photo-reductive decolorization of an azo dye by natural sphalerite: case study of a new type of visible light-sensitized photocatalyst. J Hazard Mater 170:479–486
Liao Y, Zhou L, Liang J, Xiong H (2009) Biosynthesis of schwertmannite by Acidithiobacillus ferrooxidans cell suspensions under different pH condition. Mater Sci Eng C 29:211–215
Liao Y, Liang J, Zhou L (2011) Adsorptive removal of As(III) by biogenic schwertmannite from simulated As-contaminated groundwater. Chemosphere 83:295–301
Liu X, Wu F, Deng N (2004) Photoproduction of hydroxyl radicals in aqueous solution with algae under high-pressure mercury lamp. Environ Sci Technol 38:296–299
Liu C, Li F, Li X, Zhang G, Kuang Y (2006) The effect of iron oxides and oxalate on the photodegradation of 2-mercaptobenzothiazole. J Mol Catal A: Chem 252:40–48
Mazellier P, Sulzberger B (2001) Diuron degradation in irradiated, heterogeneous iron/oxalate systems: the rate-determining step. Environ Sci Technol 35:3314–3320
Saquib M, Muneer M (2003) Titanium dioxide mediated photocatalyzed degradation of a textile dye derivative, acid orange 8 in aqueous suspensions. Desalination 155:255–263
Siffert C, Sulzberger B (1991) Light-induced dissolution of hematite in the presence of oxalate: a case study. Langmuir 7:1627–1634
Silva CG, Faria JL (2003) Photochemical and photocatalytic degradation of an azo dye in aqueous solution by UV irradiation. J Photoch Photobio A: Chem 155:133–143
Slokar YM, Marechal AML (1998) Methods of decoloration of textile wastewaters. Dyes Pigments 37:335–356
Tian X, Gao X, Yang F, Lan Y, Mao J, Zhou L (2010) Catalytic role of soils in the transformation of Cr(VI) to Cr(III) in the presence of organic acids containing α-OH groups. Geoderma 159:270–275
Wang X, Li Q, Hu H, Zhang T, Zhou Y (2005) Dissolution of kaolinite induced by citric, oxalic, and malic acids. J Colloid Interface Sci 290:481–488
Wang X, Liu C, Li X, Li F, Zhou S (2008) Photodegradation of 2-mercaptobenzothiazole in the γ-Fe2O3/oxalate suspension under UVA light irradiation. J Hazard Mater 153:426–433
Yoo ES, Libra J, Wiesmann U (2000) Reduction of azo dyes by desulfovibrio desulfuricans. Water Sci Technol 41:15–22
Zuo Y, Holgné J (1992) Formation of hydrogen peroxide and depletion of oxalic acid in atmospheric water by photolysis of iron(III)-oxalato complexes. Environ Sci Technol 26:1014–1022
Acknowledgments
This study was supported by the National Natural Science Foundation of China (grant no. 40930738) and the Fundamental Research Funds for the Central Universities (grant no. KYZ201124).
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Wu, Y., Guo, J., Jiang, D. et al. Heterogeneous photocatalytic degradation of methyl orange in schwertmannite/oxalate suspension under UV irradiation. Environ Sci Pollut Res 19, 2313–2320 (2012). https://doi.org/10.1007/s11356-012-0740-4
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DOI: https://doi.org/10.1007/s11356-012-0740-4