Genotoxicity of the disinfection by-products resulting from peracetic acid- or hypochlorite-disinfected sewage wastewater

被引：99

作者：

Crebelli, R

Conti, L

Monarca, S

Feretti, D

Zerbini, I

Zani, C

Veschetti, E

Cutilli, D

Ottaviani, M

机构：

[1] Ist Super Sanita, Lab Environm Hyg, NCFQRA, I-00161 Rome, Italy

[2] Ist Super Sanita, Comparat Toxicol & Ecotoxicol Lab, I-00161 Rome, Italy

[3] Univ Brescia, Hyg Sect, Dept Expt & Appl Med, Brescia, Italy

来源：

WATER RESEARCH | 2005年 / 39卷 / 06期

关键词：

wastewater; disinfection; peracetic acid; mutagenicity; bacterial reversion assays; Allium; Tradescantia assays;

D O I：

10.1016/j.watres.2004.12.029

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Wastewater disinfection is routinely carried out to prevent the spread of human pathogens present in wastewater effluents. To this aim, chemical and physical treatments are applied to the effluents before their emission in water bodies. In this study, the influence of two widely used disinfectants, peracetic acid (PAA) and sodium hypochlorite (NaClO), on the formation of mutagenic by-products was investigated. Wastewater samples were collected before and after disinfection, in winter and in summer, at a pilot plant installed in a municipal wastewater-treatment plant. Samples were adsorbed using silica C-18 cartridges and the concentrates were tested for mutagenicity in the Salmonella typhimurium reversion test with strains TA98 and TA100. Non-concentrated water samples were tested with two plant genotoxicity assays (the Allium cepa root anaphase aberration test and the Tradescantia/micronucleus test). Mutagenicity assays in bacteria and in Tradescantia showed borderline mutagenicity in some of the wastewater samples, independent of the disinfection procedure applied. Negative results were obtained in the A. cepa anaphase aberration test. These results indicate that, in the conditions applied, wastewater disinfection with PAA and NaClO does not lead to the formation of significant amounts of genotoxic by-products. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1105 / 1113

页数：9

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