Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV

Document Type: Original Article


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

2 Sanandaj Health Center AND Department of Environmental Health Engineering, School of Public Health, Kurdistan University of Medical Sciences, Sanandaj, Iran

3 Department of Environmental Health Engineering, School of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran

4 Department of Chemical Engineering, School of Chemical Engineering, Tarbiat Modares University, Tehran, Iran


Due to the present water shortage and environmental problems associated with industrial effluent, investigation of novel treatment technologies is an essential approach. Being a highly toxic chemical of asphyxiating characteristics, cyanide is seen as a major environmental pollutant in a wide range of industrial effluents. The present study aimed to address the adsorption and photocatalytic degradation of cyanide using activated fly ash and TiO2/UV. To investigate the removal efficiency of cyanide, two sets of experiments were designed. First, cyanide was absorbed by activated fly ash and degraded via a photocatalytic process, individually. Second, simultaneous adsorption and degradation was examined. The removal efficiency of cyanide by modified fly ash (MFA), TiO2/UV, and their combination (MFA-TiO2/UV) was 76.1%, 81%, and 86.6%, respectively. Optimal conditions for the combination of activated fly ash AFA-TiO2/UV were contact time of 6 hours, temperature of 100 °C, and AFA: TiO2 ratio (w/w) of 1:1. Under these conditions, a maximum removal rate of 92.4% was obtained when 1.2 g of MFA/TiO2 was used with a pH value of 3 in the presence of UV light. Based on the results of cyanide removal, it can be concluded that the combination of adsorption and photocatalytic degradation with MFA-TiO2/UV can be utilized to improve the removal of cyanide from wastewater. 


  1. Dash RR, Gaur A, Balomajumder C. Cyanide in industrial wastewaters and its removal: a review on biotreatment. J Hazard Mater 2009; 163(1): 1-11.
  2. Naveen G, Majumder CB, Mondal P, Shubha D. Biological treatment of cyanide containing wastewater. Res J Chem Sci 2011; 1(7): 15-21.
  3. Dash RR, Balomajumder C, Kumar A. Removal of cyanide from water and wastewater using granular activated carbon. Chem Eng J 2009; 146(3): 408-13.
  4. Shokuhi R, Mahvi A, Bonyadi Z. Efficiency compare of both sonochemical and photosonochemical technologies for cyanide removal from aqueous solutions. Iran J Health Environ 2010; 3(2): 177-84. [In Persian].
  5. Baskin SI, Kelly JB, Maliner BI, Rockwood GA, Zoltani CK. Cyanide poisoning. In: Tuorinsky SD, Editor. Medical aspects of chemical warfare. Washington, DC: Walter Reed Army Medical Center; 2008. p. 371-410.
  6. Nelson L. Acute cyanide toxicity: mechanisms and manifestations. J Emerg Nurs 2006; 32(4 Suppl): S8-11.
  7. Malhotra S, Pandit M, Kapoor JC, Tyag DK. Photo-oxidation of cyanide in aqueous solution by the UV/H2O2 process. Journal of Chemical Technology and Biotechnology 2005; 80(1): 13-9.
  8. Karunakaran C, Gomathisankar P, Manikandan G. Solar photocatalytic detoxification of cyanide by different forms of TiO2. Korean J Chem Eng 2011; 28(5): 1214-20.
  9. Kim JH, Lee HI. Effect of surface hydroxyl groups of pure TiO2 and modified TiO2 on the photocatalytic oxidation of aqueous cyanide. Korean J Chem Eng 2007; 21(1): 116-22.
  10. Lu Z, Zhou W, Huo P, Luo Y, He M, Pan J, et al. Performance of a novel TiO2 photocatalyst based on the magnetic floating fly-ash cenospheres for the purpose of treating waste by waste. Chemical Engineering Journal 2013; 225: 34-42.
  11. Wang B, Li C, Pang J, Qing X, Zhai J, Li Q. Novel polypyrrole-sensitized hollow TiO2/fly ash cenospheres: Synthesis, characterization, and photocatalytic ability under visible light. Appl Surf Sci 2012; 258(24): 9989-96.
  12. Salinas-Guzm?n R, Guzm?n-Mar JL, Hinojosa-Reyes L, Peralta-Hern?ndez JM, Ram?rez H. Enhancement of cyanide photocatalytic degradation using sol?gel ZnO sensitized with cobalt phthalocyanine. J Solgel Sci Technol 2010; 54(1): 1-7.
  13. Chiang K, Amal R, Tran T. Photocatalytic degradation of cyanide using titanium dioxide modified with copper oxide. Advances in Environmental Research 2002; 6(4): 471-85.
  14. Rezaee A, Pourtaghi GH, Khavanin A, Saraf Mamoori R, Hajizadeh E, Valipour F. Elimination of toluene by application of ultraviolet irradiation on TiO2 Nano particles photocatalyst. J Mil Med 2007; 9(3): 217-22. [In Persian].
  15. Low W, Boonamnuayvitaya V. Enhancing the photocatalytic activity of TiO2 co-doping of graphene?Fe3+ ions for formaldehyde removal. J. Environ. Manage 2013; 127: 142-9.
  16. Visa M, Andronic L, Lucaci D, Duta A. Concurrent dyes adsorption and photo-degradation on fly ash based substrates. Adsorption 2011; 17(1): 101-8.
  17. Shi Z, Yao S, Sui C. Application of fly ash supported
  18. titanium dioxide for phenol photodegradation in aqueous solution. Catal Sci Technol 2011; 1(5): 817-22.
  19. Zhang BH, Wu DY, Wang C, He SB, Zhang ZJ, Kong HN. Simultaneous removal of ammonium and phosphate by zeolite synthesized from coal fly ash as influenced by acid treatment. J Environ Sci (China) 2007; 19(5): 540-5.
  20. Wang S, Boyjoo Y, Choueib A, Zhu ZH. Removal of dyes from aqueous solution using fly ash and red mud. Water Res 2005; 39(1): 129-38.
  21. Li Y, Liu C, Luan Z, Peng X, Zhu C, Chen Z, et al. Phosphate removal from aqueous solutions using raw and activated red mud and fly ash. J Hazard Mater 2006; 137(1): 374-83.
  22. Panitchakarn P, Klamrassamee T, Laosiripojana N, Viriya-empikul N, Pavasant P. Synthesis and testing of zeolite from industrial-waste coal fly ash as sorbent for water adsorption from ethanol solution. Engineering Journal 2014; 18(1): 1-12.
  23. Wang S, Wu H. Environmental-benign utilisation of fly ash as low-cost adsorbents. J Hazard Mater 2006; 136(3): 482-501.
  24. Kashiwakura S, Ohno H, Kumagai Y, Kubo H, Matsubae K, Nagasaka T. Dissolution behavior of selenium from coal fly ash particles for the development of an acid-washing process. Chemosphere 2011; 85(4): 598-602.
  25. Kashiwakura S, Ohno H, Matsubae-Yokoyama K, Kumagai Y, Kubo H, Nagasaka T. Removal of arsenic in coal fly ash by acid washing process using dilute H2SO4 solvent. J Hazard Mater 2010; 181(1-3): 419-25.
  26. Huo P, Yan Y, Li S, Li H, Huang W, Chen S, et al. H2O2 modified surface of TiO2/fly-ash cenospheres and enhanced photocatalytic activity on methylene blue. Desalination 2010; 263(1-3): 258-63.
  27. Visa M, Duta A. Methyl-orange and cadmium simultaneous removal using fly ash and photo-Fenton systems. J Hazard Mater 2013; 244-245: 773-9.
  28. Visa M, Duta A. Adsorption behavior of cadmium and copper compounds on a mixture FA: TiO2. Revue Roumaine de Chimie 2010; 55(3): 167-73.
  29. Samarghandi M, Siboni M, Maleki A, Jafari S, Nazemi F. Kinetic determination and efficiency of titanium dioxide photocatalytic process in Removal of Reactive Black 5 (RB5) dye and cyanide from aquatic solution. J Mazandaran Univ Med Sci 2011; 21(81): 44-52. [In Persian].
  30. Kim HJ, Lu L, Kim JH, Lee CH, Hyeon T, Choi W, et al. UV light induced photocatalytic degradation of cyanides in aqueous solution over modified TiO2. Bull Korean Chem Soc 2001; 22(12): 1371-4.
  31. Wahaab RA, Moawad AK, Taleb EA, Ibrahim H, El-Nazer HA. Combined photocatalytic oxidation and chemical coagulation for cyanide and heavy metals removal from electroplating wastewater. World Appl Sci J 2010; 8(4): 462-9.
  32. Joshi K, Patil B, Shirsath D, Shrivastava V. Photocatalytic removal of Ni (II) and Cu (II) by using different Semiconducting materials. Advances in Applied Science Research 2011; 2(3): 445-54.
  33. Tu Y, Xiong Y, Tian S, Kong L, Descorme C. Catalytic wet air oxidation of 2-chlorophenol over sewage sludge-derived carbon-based catalysts. J Hazard Mater 2014; 276: 88-96.
  34. Ghaneian M, Ehrampoush M, Ghanizadeh G, Dehvary M, Abootoraby M, Jasemizad T. Application of solar irradiation/K2S2O8 photochemical oxidation process for the removal of reactive blue 19 dye from aqueous solutions. Iran J Health Environ 2010; 3(2): 165-76. [In Persian].
  35. Shirzad Siboni M, Samadi MT, Rahmani A, Khataee A, Bordbar M, Samarghandi M. Photocatalytic removal of hexavalet chromium and divalent nickel from aqueous solution by UV irradiation in the presence of titanium dioxide vanoparticles. Iran J Health Environ 2010; 3(3): 261-70. [In Persian].
  36. Hemmati Borji S, Nasseri S, Nabizadeh Nodehi R, Mahvi A, Javadi A. Photocatalytic degradation of phenol in aqueous solutions by Fe (III)-doped TiO2/UV process. Iran J Health Environ 2011; 3(4): 369-80. [In Persian].