Enhancing solar disinfection (SODIS) with the photo-Fenton or the Fe2+/peroxymonosulfate-activation process in large-scale plastic bottles leads to toxicologically safe drinking water

WATER RESEARCH

卷:186

Article

Diez, Paloma Ozores¹  Giannakis, Stefanos²  Rodriguez-Chueca, Jorge^3,4  Wang, Da^3,5  Quilty, Brid¹  Devery, Rosaleen¹  McGuigan, Kevin⁶  Pulgarin, Cesar³ 

[1] Dublin City Univ, Sch Biotechnol, Dublin 9, Ireland

[2] Univ Politecn Madrid UPM, ETS Ingenieros Caminos Canales & Puertos, Dept Ingn Civil Hidraul Energia & Medio Ambiente, Unidad Docente Ingn Sanitaria, C Prof Aranguren S-N, ES-28040 Madrid, Spain

[3] Ecole Polytech Fed Lausanne EPFL, Grp Adv Oxidat Proc GPAO, Inst Chem Sci & Engn ISIC, Sch Basic Sci SB, Stn 6, CH-1015 Lausanne, Switzerland

[4] Univ Politecn Madrid UPM, ETS Ingenieros Ind, Dept Ingn Quim Ind & Medio Ambiente, C Jose Gutierrez Abascal 2, Madrid 28006, Spain

[5] Zhejiang Univ Technol, Coll Environm, Hangzhou 310032, Peoples R China

[6] Royal Coll Surg Ireland RCSI, Dept Physiol & Med Phys, Dublin 2, Ireland

关键词: Solar disinfection (SODIS);    Drinking water;    Oxidation process;    Toxicity;    Plastic leachables;    E. coli;   

DOI  :  10.1016/j.watres.2020.116387

来源: Elsevier

【 摘 要 】

Solar disinfection (SODIS) in 2-L bottles is a well-established drinking water treatment technique, suitable for rural, peri-urban, or isolated communities in tropical or sub-tropical climates. In this work, we assess the enlargement of the treatment volume by using cheap, large scale plastic vessels. The bactericidal performance of SODIS and two solar-Fe2+ based enhancements, namely photo-Fenton (light/H2O2/Fe2+) and peroxymonosulfate activation (light/PMS/Fe2+) were assessed in 19-L polycarbonate (PC) and 25-L polyethylene terephthalate (PET) bottles, in ultrapure and real water matrices (tap water, lake Geneva water). Although SODIS always reached total (5-logU) inactivation, under solar light, enhancement by or both Fe2+/H2O2 or Fe2+/PMS was always beneficial and led to an increase in bacterial elimination kinetics, as high as 2-fold in PC and PET bottles with tap water for light/H2O2/Fe2+, and 8-fold in PET bottles with Lake Geneva water. The toxicological safety of the enhancements and their effects on the plastic container materials was assessed using the E-screen assay and the Ames test, after 1-day or 1-week exposure to SODIS, photo-Fenton and persulfate activation. Although the production of estrogenic compounds was observed, we report that no treatment method, duration of exposure or material resulted in estrogenicity risk for humans, and similarly, no mutagenicity risk was measured. In summary, we suggest that SODIS enhancement by either HO center dot- or SO4 center dot--based advanced oxidation process is a suitable enhancement of bacterial inactivation in large scale plastic bottles, without any associated toxicity risks. (c) 2020 The Authors. Published by Elsevier Ltd.

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