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Toxicological & En vir on m en tal Chem istr y
V olu m e 9 3, I ssu e 8 , 20 11
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Photo- and electr o-catalysis for solar disinfection of
Escher ichi a
col i
-contam inated water using Ag– TiO
2
/ gr aphite
DOI :
10.1080/ 02772248.2011.604322
Fitria Rahm awatia* , Triana Kusumaningsihb & Aris Hastutia pages 1602-1612
Publishing m odels and ar ticle dates explained Received: 9 Jan 2011
Accepted: 6 Jul 2011
Accepted author version posted online: 13 Jul 2011 Published online: 10 Aug 2011
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A titanium dioxide film on a graphite substrate was synthesized by chemical bath deposition from TiCl4 as precursor and with the surfactant cetyl trimethyl ammonium bromide as a linking and assembling agent. Silver was loaded on the TiO2 film by electrodeposition at 0.025 A. Water contaminated with Escher ichia coli was disinfected under sunlight irradiation by photolysis (Lys), photocatalysis (PC), photoelectrocatalysis (PEC), and electrocatalysis (EC). The highest rate constant, k, was achieved with EC; k was 5.1 × 10−2 colony forming units (CFU) mL−1 m in−1. However, auto-oxidation of Ag occurred during EC and PEC. Meanwhile, the rate constant of disinfection by means of PC was lower than EC and PEC, and k was 3.82 × 10−2 CFU mL−1 min−1. Nevertheless, the auto-oxidation of Ag in the Ag– TiO2/ graphite tablet did not occur during the disinfection process.
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Escherichia coli , solar disinfection, Ag– TiO2/ Graphite Related
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Received: 09 Jan 2011 Accepted: 06 Jul 2011
Accepted author ver sion posted online: 13 Jul 2011 Published online: 10 Aug 2011
Au th or affiliation s
a Departm ent of Chem istry, Research Group of Physical Chemistry, Sebelas Maret University, Jl. I r. Sutami 36 A, Surakarta 57772, I ndonesia b Department of Chemistry, Research Group of Biochemistry, Sebelas Maret University, Jl. I r. Sutam i 36 A Kentingan, Surakarta 57772, I ndonesia Click to decrease image size
