(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170


Pages: 151-157
E. Ajenifuja, J. A. Ajao and E. O. B. Ajayi

keywords: Antimicrobial, ceramic membrane, photocatalysis, remediation, titanium dioxide


Photocatalytic ceramic membrane filter was prepared mainly from raw kaolinite clay. Ag-doped TiO2 nanoparticles (STOX) were intercalated in the ceramic membrane to modify its properties. Characterizations of the materials were carried out using Fourier Transform Infrared (FTIR) Spectroscopy, Energy Dispersive X-ray Emission (EDX), Scanning Electron Microscopy (SEM) and X-ray Diffractrometry (XRD). Ceramic membranes were formed by press method and subsequently subjected to a high temperature sintering treatment for physico-chemical stability. Ceramic membrane modules were constructed and experiments were carried out to test the remediation functionalities on polluted water using Atomic Absorption Spectrophotometry (AAS) and Total Bacterial Count Enumeration. Experimental results showed reduction in the concentration of Cd2+, Ni2+and K+, while increased concentrations were observed for Ca2+, Na+ and Mg2+. Ceramic membranes exhibited highest flux output of 246.685 L/hr.m2 under a transmembrane pressure of 0.0196 MPa. The antimicrobial microfiltration process indicated 100% bacterial removal and 70% fungi removal in most of the samples.


Ajenifuja E, Ajao JA, Alayande SO, Bakare MK, Taleatu BA & Ajayi EOB 2016. Synthesis and Characterization of Pure and Ag-TiO2-Modified Diatomaceous Aluminosilicate Ceramic Membranes for Water Remediation. J. Water Resource & Protection, 8: 594-607. Ajenifuja E, Akinwunmi, OO, Bakare MK, Ajao JA, Adeniyi IF& Ajayi EOB 2012. Remediation of Polluted Water Using Natural Zeolitic Aluminosilicates/Lateritic Clay Ceramic Matrix Membrane. ISRN Ceramics:2012. Akiyama H, Yamasake O, Kanzaki H, Tada J& Arata J 1998. Effects of sucrose and silver on Staphylococcus aureus biofilm. J. Antimicrob. Chemothe., 42:629–634. Ambikadevi VR & Gopalakrishna SJ1997. Iron stain removal by bleaching and leaching techniques. 10th Kerala Science, pp. 445– 448. Ambikadevi VR & Lalithambika M 2000. Effect of organic acids on ferric iron removal from iron-stained kaolinite. Appl. Clay Sci., 16: 133–145. Amorim LV, Gomes CM, Lira HD, Franca KB & Ferreira H C 2004. Bentonites from Boa Vista, Brazil: Physical, Mineralogy and Rheological Properties. Materials Res., 7(4): 583-593. Asahi R& Morikawa T 2007. Nitrogen complex species ant its chemical nature in TiO2 for visible-light sensitized photocatalysis. Chem. Phys., 339: 57-63. Asahi R, Morikawa T, Ohwaki T, Aoki K& Taga Y 2001. Visible-light photocatalysis in nitrogen-doped titanium. Science, 293: 269-271. Balachandran U, Lee TH& Doris SE 2007. Hydrogen production bywater dissociation using mixed conducting dense ceramic membranes. Int. J. Hydrogen Energy, 32: 451 – 456. Balan E 2001. First-principles modelling of the infrared spectrum of kaolinite. American Mineralogist, 86: 1321-1330. Bhattacharyya KG & Gupta SS 2008. Adsorption of a few heavy metals on natural and modified kaolinite and montmorillonite: A review. Advances in Colloid & Interface Sci., 140: 114–131. Borggaard OK 1979. Selective extraction of amorphous iron oxides by EDTA from a Danish sandy loam. J. Soil Sci., 30: 727– 734. Bruvold WH & Ongerth JH 1969. Taste quality of mineralized water. J. Amer. Water Works Assoc., 61: 170. Clasen TF, Brown J, Collin S, Suntura O & Cairncross S2004. Reducing Diarrhea Through the Use of Household-based Ceramic Water Filters: A Randomized, Controlled Trial in Rural Bolivia. Amer. J. Trop. Medicine & Hygiene, 70(6): 651-657. Conley RF & Lloyd MK 1970. Improvement of iron leaching in clays: optimizing processing parameters in sodium dithionate reduction. Ind. Eng. Chem. Process Des. Dev., 9(4): 595– 601. Cowan MM, Abshire KZ, Houk SL&Evans SM 2003. Antimicrobial efficacy of a silver-zeolite matrix coating on stainless steel. J. Ind. Microbiol. Biotechnol., 30: 102–106. de Mesquita LM, Rodrigues T & Gomes SS 1996. Bleaching of Brazilian kaolins using organic acids and fermented medium. Miner. Eng., 9(9): 965–971. Ebrahimi M, Kovacs Z, Schneider M, Mund P & Bolduan P 2012. Multistage filtration process for efficient treatment of oil-field produced water using ceramic membranes. Desalin. Water Treat., 42(1–3): 17–23. Ebrahimi M, Schmitz O, Kerker S, Liebermann F & Czermak P 2013. Dynamic cross-flow filtration of oilfield produced water by rotating ceramic filter discs. Desalination and Water Treatment, 51(7-9): 1762-1768. Farhount N 1989. Ph.D Thesis: Beneficiation of kaolins of islands of Milos. Athens.: National Technical University . Farmer VC 1974. The layer silicates. In: Farmer, V.C., Ed., the Infrared Spectra of Minerals, Mineralogical Society, London, pp. 331-363. Greenwood NN & Earnshaw A 1984. Chemistry of the Elements. Oxford: Pergamon Press. Grimshaw RW 1971. Physics and Chemistry of Clay (4th ed.). London: Ernest Benn. Groudev SN 1999. Biobeneficiation of mineral raw materials. Miner. Metall. Process., 16(4): 19–28. Han YS, Li JB, Chi B & Wen ZH2003. The effect of sintering temperature on porous silica composite strength. J. Porous Materials, 10: 41–45. Hanaor DA & Sorrell CC 2014. Sand supported mixed-phase TiO2 photocatalysts for water decontamination applications. Advanced Engineering Materials, 16(2): 248–254. Hanaor D, Michelazzi M, Leonelli C & Sorrell C C 2011. The effects of firing conditions on the properties of electrophoretically deposited titanium dioxide films on graphite substrates. J. Europ. Ceramic Soc., 31(15): 2877–2885. Komskaja M, Dolin A& Yatsunova S 1971. Enrichment of kaolin. Otkryt. Izobret. Prom. Obraztsy Tovar. Znaki, 48(5): 42–56. Kondo MM & Jardim WF 1991. Photodegradation of chloroform and urea using ag-loaded titanium dioxide as catalyst. Water Res., 25: 823-827. Lansdown AB 2006. Silver in Healthcare: an Enigma and Pathological Fascination. The Bulleting of The Royal College of Pathologists, 133: 36-38. Lee EY, Cho KS & Wook R H 2002. Microbial refinement of kaolin by iron-reducing bacteria.Appl. Clay Sci., 22: 47–53. Lee S & Cho J 2004. Comparison of ceramic and polymeric membranes for natural organic matter (NOM) removal. Desalination, 160: 223-232. Leiviskä T, Gehör S, Eijärvi E, Sarpola A & Tanskanen J 2012. Characteristics and potential applications of coarse clay fractions from Puolanka, Finland. Cent. Eur. J. Eng., 2(2): 239-247. Lundquist A, Clarke S& Bettin W 2006. Filtration in the Use of Individual Water Purification Devices. 5158 Blackhawk Road, APG, MD, 21010: U.S. Army Center for Health Promotion and Preventive Medicine (USACHPPM). MacConkey A 1905. Lactose-fermenting bacteria in feces. J. Hyg., 5: 333-379. Matsunaga T, Tomoda R, Nakajima T& Wake H 1985. Photoelectrochemical Sterilization of Microbial-Cells by Semiconductor Powders. FEMS Microbiology Letters, 29(1-2): 211-214. Medioroz S, Pajares JA, Brito I, Pesquera C, Gonzalez F & Blanco C 1987. Langmuir, 3: 676-681. Nayak PS & Singh BK 2007. Instrumental characterization of clay by XRF, XRD and FTIR. Bull. Mater. Sci., 30(3): 235-238. Nickolov R, Spassova I, Velichkova N, Khristova N, Dimitrova V & Tzvetkova P 2013. Hybrid materials as catalyst support in NO reduction with CO. Microporous and Mesoporous Materials, 165: 193–199. Page K 2009. Photocatalytic Thin Films: Their Characterizations and Antimicrobial Properties. London: University College London. Presto DR, Vasudevan TV, Bitton G, Farrah SR & Morel J 1988. Novel Approach for Modifying Microporous Filters for Virus Concentration from Water. Applied and Environmental Microbiology, 54(6): 1325-1329. Russell JD & Fraser AR 1994. Clay Mineralogy: Spectroscopic and Chemical Determinative Methods. In M. J. Wilson, Infrared methods (pp. 11 –67). London: Chapman & Hall. Ryu HW, Cho KS, Chang YK, Kim SD & Mori T 1995. Refinement of low-grade clay by microbial removal of sulfur and iron compounds using Thiobacillus ferrooxidans. J. Ferment. Bioeng., 80: 46–52. Sandven P & Lassen J 1999. Importance of selective media for recovery of yeasts from clinical specimens. J. Clinical Microbio., 37(11): 3731–2. Sato S, Nakamura R & Abe S 2005. Visible Light sensitization of TiO2 photocatalysts by wet method N doping. Appl. Catal. A, 284: 131-137. Shoumkov S, Dimitrov Z & Brakalov L 1987. High gradient magnetic treatment of kaolin. Interceram , 36(6): 26– 28. Vaculikova L & Plevova E 2005. Identifcation of clay minerals and micas in sedimentary rocks. Acta Goedyn. Geomater., 2 (138): 167-175. Veglio F & Toro L 1994. Process development of kaolin bleaching using carbohydrates in acid media. Int. J. Miner. Process, 41: 239– 255. Veglio F, Passariello B, Toro L & Marabini AM 1996. Development of a bleaching process for a kaolin of industrial interest by oxalic, ascorbic and sulphuric acids: preliminary study using statistical methods of experimental design. Ind. Eng. Chem. Res., 35: 1680– 1687. Wu JC-S & Chen CH 2004. A visible-light response vanadium-doped titania nanocatalyst by sol-gel method. J Photochem. Photobiol A, 163: 509-515. Yin J, Yang Y, Hu Z & Deng B 2013. Attachment of silver nanoparticles (AgNPs) onto thin-film composite (TFC) membranes through covalent bonding to reduce membrane biofouling. J. Membrane Sci., ttp://dx.doi.org/10.1016/j.memsci..03.060. Yoshihisa B 2001. Highly porous silicate ceramics prepared from saponite clay. Mineral, 3(1): 35-38. Zaleska A 2008. Characteristics of Doped-TiO2 Photocatalysts. Physicochem. Problems of Mineral Processing, 42: 211-222