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Lhotský O, Krákorová E, Mašín P, Žebrák R, Linhartová L, Křesinová Z, Kašlík J, Steinová J, Rødsand T, Filipová A, Petrů K, Kroupová K, Cajthaml T. Pharmaceuticals, benzene, toluene and chlorobenzene removal from contaminated groundwater by combined UV/H 2O 2 photo-oxidation and aeration. Water Res 2017; 120:245-255. [PMID: 28500989 DOI: 10.1016/j.watres.2017.04.076] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 04/22/2017] [Accepted: 04/29/2017] [Indexed: 06/07/2023]
Abstract
This study was performed to test the feasibility of several decontamination methods for remediating heavily contaminated groundwater in a real contaminated locality in the Czech Republic, where a pharmaceuticals plant has been in operation for more than 80 years. The site is polluted mainly by recalcitrant psychopharmaceuticals and monoaromatic hydrocarbons, such as benzene, toluene and chlorobenzene. For this purpose, an advanced oxidation technique employing UV radiation with hydrogen peroxide dosing was employed, in combination with simple aeration pretreatment. The results showed that UV/H2O2 was an efficient and necessary step for degradation of the pharmaceuticals; however, the monoaromatics were already removed during the aeration step. Characterization of the removal mechanisms participating in the aeration revealed that volatilization, co-precipitation and biodegradation contributed to the process. These findings were supported by bacterial metabolite analyses, phospholipid fatty acid analysis, qPCR of representatives of the degradative genes and detailed characterization of the formed precipitate using Mössbauer spectroscopy and scanning electron microscopy. Further tests were carried out in a continuous arrangement directly connected to the wells already present in the locality. The results documented the feasibility of combination of the photo-reactor employing UV/H2O2 together with aeration pretreatment for 4 months, where the overall decontamination efficiency ranged from 72% to 99% of the pharmaceuticals. We recorded even better results for the monoaromatics decontamination except for one month, when we encountered some technical problems with the aeration pump. This demonstrated the necessity of using the aeration step.
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Affiliation(s)
- Ondřej Lhotský
- DEKONTA a.s., Volutová 2523, CZ-158 00, Prague 5, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague 2, Czech Republic
| | - Eva Krákorová
- DEKONTA a.s., Volutová 2523, CZ-158 00, Prague 5, Czech Republic; Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20, Prague 4, Czech Republic
| | - Pavel Mašín
- DEKONTA a.s., Volutová 2523, CZ-158 00, Prague 5, Czech Republic
| | - Radim Žebrák
- DEKONTA a.s., Volutová 2523, CZ-158 00, Prague 5, Czech Republic
| | - Lucie Linhartová
- Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20, Prague 4, Czech Republic
| | - Zdena Křesinová
- Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20, Prague 4, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague 2, Czech Republic
| | - Josef Kašlík
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry and Experimental Physics, Faculty of Science, Palacký University, 17. Listopadu 1192/12, CZ-771 46, Olomouc, Czech Republic
| | - Jana Steinová
- Technical University of Liberec, Studentská 2, CZ-461 17, Liberec, Czech Republic
| | - Torgeir Rødsand
- ALS Laboratory Group Norway AS, Drammensveien 173, N-0214, Oslo, Norway
| | - Alena Filipová
- Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20, Prague 4, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague 2, Czech Republic
| | - Klára Petrů
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague 2, Czech Republic
| | - Kristýna Kroupová
- Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague 2, Czech Republic
| | - Tomáš Cajthaml
- Institute of Microbiology Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, CZ-142 20, Prague 4, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague 2, Czech Republic.
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