Photo- and electro-catalysis for solar disinfection of Escherichia coli-contaminated water using Ag-TiO2/graphite

被引：13

作者：

Rahmawati, Fitria ^{[1
]}

Kusumaningsih, Triana ^{[2
]}

Hastuti, Aris ^{[1
]}

机构：

[1] Sebelas Maret Univ, Dept Chem, Res Grp Phys Chem, Surakarta 57772, Indonesia

[2] Sebelas Maret Univ, Dept Chem, Biochem Res Grp, Surakarta 57772, Indonesia

来源：

TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY | 2011年 / 93卷 / 08期

关键词：

photo catalysis; electro catalysis; Escherichia coli; solar disinfection; Ag-TiO2/Graphite; BACTERICIDAL ACTIVITY; BACILLUS-SUBTILIS; TITANIUM-DIOXIDE; TIO2; DNA; INACTIVATION; DEGRADATION; SUSPENSIONS; FILM;

D O I：

10.1080/02772248.2011.604322

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 Escherichia 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 x 10(-2) colony forming units (CFU) mL(-1) min(-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 x 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.

引用

页码：1602 / 1612

页数：11

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