An integrated drinking water production system to remove chemical and microbiological pollution from natural groundwater by a coupled prototype helio-photochemical/H2O2/rapid sand filtration/chlorination powered by photovoltaic cell
| Autor: | Julián A. Rengifo-Herrera, Janeth Sanabria, John J. Alvear-Daza, Héctor M. Gutiérrez-Zapata |
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| Rok vydání: | 2018 |
| Předmět: |
Pollution
CPC REACTORS media_common.quotation_subject 02 engineering and technology 2 4-D 010501 environmental sciences BACTERIA INACTIVATION 01 natural sciences Water production law.invention law General Materials Science DETOXIFICATION Filtration 0105 earth and related environmental sciences media_common DRINKING WATER PRODUCTION Renewable Energy Sustainability and the Environment Otras Ciencias Químicas Ciencias Químicas Environmental engineering PHOTO-FENTON SOLAR DISINFECTION 021001 nanoscience & nanotechnology Environmental science 0210 nano-technology CIENCIAS NATURALES Y EXACTAS Groundwater |
| Zdroj: | Solar Energy. 176:581-588 |
| ISSN: | 0038-092X |
| DOI: | 10.1016/j.solener.2018.10.070 |
| Popis: | This study evaluates the simultaneous removal of 2,4-dichlorophenoxyacetic acid acid-2,4-D at 70 μg L−1 and the viability decreasing of Escherichia coli and Klebsiella pneumoniae from real groundwater samples containing natural amounts of iron (0.39 mg L−1) and natural pH (7.31) in a coupled prototype system powered by a photovoltaic cell (SPh + LPh + H2O2 + RSF + Cl) consisting of photochemical (using both natural sunlight (SPh) and UV-B + A + Visible lamp (LPh) and a 30-L Compound Parabolic Collector-CPC reactor), rapid sand filtration (RSF) and chlorination (Cl, adding of Ca(OCl)2 to get residual chlorine ranging between 0.2 and 0.6 mg Cl L−1) to drinking water production. Results showed that simple addition of H2O2 10 mg L−1 and both natural sunlight and artificial light irradiation could enhance several natural photo-induced processes among them photocatalytic and photo-Fenton. These radicals could be responsible for both bacteria inactivation and 2,4-D removal from natural groundwater diminishing the addition of substantial amounts of chemicals into water samples. Coupling of photochemical processes with conventional treatments to drinking water production as RSF and Cl at high solar energy dose (150,000 J m−2), led to the efficient removal 2,4-D and bacteria from natural groundwater without a significative trihalomethanes production. These results strongly suggest that coupling of helio-photochemical/H2O2 systems with RSF and chlorination treatments seems to be a promising approach to remove chronic and acute risk from groundwater obtaining drinking water with high chemical and microbiological quality. However, despite these encouraging results, bacteria inactivation underwent a detrimental effect when low solar energy doses (75,000 J m−2) were tested. Fil: Alvear Daza, John Jairo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina. Universidad del Valle; Colombia Fil: Sanabria, Janeth. Universidad del Valle; Colombia Fil: Gutiérrez Zapata, Héctor M.. Universidad del Valle; Colombia Fil: Rengifo Herrera, Julian Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina |
| Databáze: | OpenAIRE |
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