Evaluation of the efficiency of the photo Fenton disinfection of natural drinking water source during the rainy season in the Sahelian region

被引：34

作者：

Ndounla, J. ^{[1
,2
]}

Pulgarin, C. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn GPAO, CH-1015 Lausanne, Switzerland

[2] Inst Int Ingn Eau & Environm, LEDES, Ouagadougou, Burkina Faso

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2014年 / 493卷

关键词：

Photo-Fenton; Inactivation; Enteric bacteria; Drinking water; SOLAR DISINFECTION; ESCHERICHIA-COLI; PET BOTTLES; WELL-WATER; IRON; INACTIVATION; SUPEROXIDE; COMPLEXES; BACTERIA; REACTORS;

D O I：

10.1016/j.scitotenv.2014.05.139

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photo-disinfection of water from two different wells (W1, pH: 4.6-5.1 +/- 0.02) and (W2 pH: 5.6-5.7 +/- 0.02) was carried out during the rainy season at Ouagadougou-Burkina Faso, West Africa. The weather variation during the rainy season significantly affects the photo-disinfection processes (solar disinfection and photo-Fenton). The dilution of the water by rainwater highly affected the chemical composition of the wells' water used in this study; very low iron contents Compared to the ones recorded during the dry season were recorded in all water samples. Both photo-disinfection processes were used to treat 25 L of water in a compound parabolic collector (CPC). None of them have shown the total inactivation of both wild enteric bacteria strains (total coliforms/E. coli and Salmonella spp.) involved in the treatment. However, the total coliforms/E. coli strains were totally inactivated during the exposure under most of the photo-Fenton treatment. Also, the remaining strains, especially those of Salmonella spp. were achieved during the subsequent 24 h of dark storage under the action of the Fenton process. Under uniquely solar radiation, total inactivation was recorded only in the total coliforms/E. coli strains. The impact of the available irradiance on the efficiency of the photo-Fenton disinfection of natural water was highlighted during the exposure under high intermittent solar radiation. The impact of the HCO3- concentration of both wells' water on the evolution of the pH during the photo-disinfection was recorded. Drastic decrease was noticed after the initial fast increase in presence of low HCO3- concentration while a steady state was observed after the increase in presence of higher concentration. The redox activities of the nitrogen components of the water during both photo-disinfection processes have led to increased concentration of nitrite in all the cases and variations were noticed in that of nitrate and ammonia. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：229 / 238

页数：10

共 42 条

[1]

[Anonymous], DR 2000 SPECTR PROC

[2] Efficacy of solar disinfection of Escherichia coli, Shigella flexneri, Salmonella Typhimurium and Vibrio cholerae [J].

Berney, M. ;

Weilenmann, H. -U. ;

Simonetti, A. ;

Egli, T. .

JOURNAL OF APPLIED MICROBIOLOGY, 2006, 101 (04) :828-836

[3]

Brito NN., 2010, AMBI AGUA, V5, DOI [10.4136/ambi-agua.136, DOI 10.4136/AMBI-AGUA.136]

[4]

Cabiscol Elisa, 2000, International Microbiology, V3, P3

[5] Homogeneous photocatalysis by transition metal complexes in the environment [J].

Ciesla, P ;

Kocot, P ;

Mytych, P ;

Stasicka, Z .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2004, 224 (1-2) :17-33

[6] Randomized Intervention Study of Solar Disinfection of Drinking Water in the Prevention of Dysentery in Kenyan Children Aged under 5 Years [J].

du Preez, Martella ;

Conroy, Ronan M. ;

Ligondo, Sophie ;

Hennessy, James ;

Elmore-Meegan, Michael ;

Soita, Allan ;

McGuigan, Kevin G. .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2011, 45 (21) :9315-9323

[7] Bacterial gene products in response to near-ultraviolet radiation [J].

Eisenstark, A .

MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS, 1998, 422 (01) :85-95

[8] The chemical reduction of nitrate in aqueous solution [J].

Fanning, JC .

COORDINATION CHEMISTRY REVIEWS, 2000, 199 :159-179

[9] PHOTOCHEMISTRY OF AQUEOUS IRON(III) POLYCARBOXYLATE COMPLEXES - ROLES IN THE CHEMISTRY OF ATMOSPHERIC AND SURFACE WATERS [J].

FAUST, BC ;

ZEPP, RG .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1993, 27 (12) :2517-2522

[10] Influence of sorption to dissolved humic substances on transformation reactions of hydrophobic organic compounds in water. I. Chlorination of PAHs [J].

Georgi, Anett ;

Reichl, Annett ;

Trommler, Ulf ;

Kopinke, Frank-Dieter .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2007, 41 (20) :7003-7009

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