Photocatalytic efficiency of molybdenum-doped zinc oxide nanoparticles in treating landfill leachate

Document Type : Original Article

Authors

1 Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran

2 Vice chancellor for Research and Technology, Kurdistan University of Medical Sciences, Sanandaj, Iran

Abstract

Among various techniques available for leachate treatment, nano-photocatalytic-based techniques have been considered as efficient. The photocatalytic leachate treatment using nanoparticles of zinc oxide doped with molybdenum oxide was performed in the presence of sunlight at a laboratory scale. The molybdenum oxide doped ZnO nanoparticles were synthesized. The properties of nanoparticle were analyzed by using FTIR, SEM, and XRD. Then the parameters such as pH (3, 5, 7, 9, & 11), concentration of nanoparticles (0.5, 1, 2 and 3 g/l), concentration of leachate with dilution (1:10, 1:25, 1:50 and 1:100), and contact time (15, 30, 45, 60, 90, & 120 min) were measured to determine the removal of COD and turbidity. The analysis indicated that nanoparticle size was appropriate and acceptable. Electron microscope images also showed that the nanoparticle shape was hexagonal. The optimum value of pH was 5.  It was found that increasing the concentration of nanoparticles enhances the efficiency of the process, the concentration of nanoparticles from 0.5 to 2 g/l at 60 min of contact time, and the efficiency from 34.8 to 55.6%, and increasing in contact time decreases the COD and turbidity leachate. Enhancing the initial concentration of leachate reduces the treatment efficiency of landfill leachate.

Keywords

References

1. Gotvajn AŽ, Tišler T, Zagorc-Končan J. Comparison of different treatment strategies for industrial landfill leachate. J Hazard Mater 2009; 162(2-3): 1446-1456.
2. Kashitarash ZE, Taghi SM, Kazem N, Abbass A, Alireza R. Application of iron nanoparticles in landfill leachate treatment-case study: Hamadan landfill leachate. Iranian J Environ Health Sci Eng 2012; 9(1): 36.
3. Behnajady M, Modirshahla N, Daneshvar N, Rabbani M. Photocatalytic degradation of CI Acid Red 27 by immobilized ZnO on glass plates in continuous-mode. J Hazard Mater 2007; 140(1): 257-263.
4. Ghafari S, Aziz HA, Isa MH, Zinatizadeh AA. Application of response surface methodology (RSM) to optimize coagulation-flocculation treatment of leachate using poly-aluminum chloride (PAC) and alum. J Hazard Mater 2009; 163(2-3): 650-656.
5. Li R. Management of landfill leachate.  2009. Available at; https://www.theseus.fi/bitstream/handle/10024/8413/Rong.Li.pdf?sequence=2
6. Renou S, Givaudan J, Poulain S, Dirassouyan F, Moulin P. Landfill leachate treatment: review and opportunity. J Hazard Mater 2008; 150(3): 468-493.
7. Ntampou X, Zouboulis A, Samaras P. Appropriate combination of physicochemical methods (coagulation/flocculation and ozonation) for the efficient treatment of landfill leachates. Chemosphere 2006; 62(5): 722-730.
8. Castillo E, Vergara M, Moreno Y. Landfill leachate treatment using a rotating biological contactor and an upward-flow anaerobic sludge bed reactor. Waste Manag 2007; 27(5): 720-726.
9. Kılıç MY, Kestioglu K, Yonar T. Landfill leachate treatment by the combination of physicochemical methods with adsorption process. J Biol Environ Sci 2007; 1(1): 37-43.
10. Jia C, Wang Y, Zhang C, Qin Q. UV-TiO2 photocatalytic degradation of landfill leachate. Water Air Soil Pollut 2011; 217(1-4): 375-385.
11. Joo SH, Cheng F. Nanotechnology for environmental remediation: Springer Science & Business Media; 2006.
12. Hoseinzadeh E, Samargandi MR, Alikhani MY, Roshanaei G, Asgari G. Antimicrobial Efficacy of Zinc Oxide Nanoparticles Suspension Against Gram-Negative and Gram-Positive Bacteria. Iranian J Health Environ 2012; 5(3): 331-342.
13. Watlington K. Emerging nanotechnologies for site remediation and wastewater treatment: Environmental Protection Agency; 2005. Available at: https://nepis.epa.gov/Exe/ZyPDF.cgi/P1003FG4.PDF?Dockey=P1003FG4.PDF
14. Shahmoradi B, Ibrahim I, Namratha K, Sakamoto N, Ananda S, Somashekar R, et al. Surface modification of indium-doped ZnO hybrid nanoparticles with n-butylamine. Int J Chem Eng Res 2010; 2(2): 107-117.
15. Ahsbahs H, Sowa H. High‐pressure X‐ray investigation of zincite ZnO single crystals using diamond anvils with an improved shape. J Appl Crystallogr 2006; 39(2): 169-175.
16. Kathirvel P, Manoharan D, Mohan S, Kumar S. Spectral investigations of chemical bath deposited zinc oxide thin films–ammonia gas sensor. J Optoelectron Biomed Mate 2009; 1(1): 25-33.
17. Mote VD, Huse VR, Dole BN. Synthesis and characterization of Cr doped ZnO nanocrystals. World J Conden Matter Phys 2012; 2(04): 208.
18. Cho SP, Hong SC, Hong S-I. Photocatalytic degradation of the landfill leachate containing refractory matters and nitrogen compounds. Appl Catal B 2002; 39(2): 125-133.
19. Wiszniowski J, Robert D, Surmacz-Gorska J, Miksch K, Weber J-V. Photocatalytic mineralization of humic acids with TiO2: effect of pH, sulfate and chloride anions. Int J Photoener 2003; 5(2): 69-74.
20. Ghaneian MT, Tabatabaee M, Ehrampoush MH, Dehghani A, Nafisi MR. Application of the photocatalytic process of Ag-ZnO/UV-C for the Degradation of 2,4-Dichlorophenoxyacetic acid in aqueous solutions. Tolooebehdasht 2016; 14(6): 227-235.
21. Pardeshi S, Patil A. Effect of morphology and crystallite size on solar photocatalytic activity of zinc oxide synthesized by solution free mechanochemical method. J Mol Catal A Chem 2009; 308(1-2): 32-40.
22. Parida K, Dash S, Das D. Physico-chemical characterization and photocatalytic activity of zinc oxide prepared by various methods. J Colloid Interface Sci 2006; 298(2): 787-793.
 
Journal of Advances in Environmental Health Research
Volume 7, Issue 1
February 2019
Pages 25-31

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