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Oil field–produced water treatment: characterization, photochemical systems, and combined processes

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Abstract

Produced water, a mixture of inorganic and organic components, comprises the largest effluent stream from oil and gas activities. The removal of contaminants from this wastewater is receiving special attention of the researchers since most of them are persistent and difficult to remove with simple techniques. Several technologies from conventional to advanced oxidation processes have been employed to treat produced water. However, the achievement of greater efficiency may be conditioned to a combination of different wastewater treatment techniques. Hereupon, the present paper discusses three important aspects regarding produced water treatment: analytical methods used for characterization, relevant aspects regarding photochemical systems used for advanced oxidation processes, and combined techniques for treating oil field wastewaters. Analytical methods employed for the quantification of the main species contained in produced water are presented for a proper characterization. Photochemical aspects of the reaction systems such as operating conditions, types of irradiation sources, and technical details of reactors are also addressed. Finally, research papers concerning combined treatment techniques are discussed focusing on the essential contributions. Thus, this manuscript aims to assist in the development of novel techniques and the improvement of produced water treatment to obtain a high-quality treated effluent and reduce environmental impacts.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This study received financial support from CAPES (Coordination for the Improvement of Higher Education Personnel), CNPq (National Council for Scientific and Technological Development), and ANP (Brazilian National Agency of Petroleum, Natural Gas and Biofuels).

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Contributions

Conceptualization: L. R. Hollanda; methodology: S. B. F. Santos; formal analysis and investigation: J. G. A. A. Faustino; writing—original draft preparation: L. R. Hollanda, E. L. Foletto; writing—review and editing: G. L. Dotto, E. L. Foletto; funding acquisition: O. Chiavone-Filho; supervision: O. Chiavone-Filho. All authors read and approved the final manuscript.

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Correspondence to Guilherme Luiz Dotto.

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The authors declare no competing interests.

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Responsible Editor: Philippe Garrigues

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Hollanda, .R., Santos, S.B.F., Faustino, J.G.A.A. et al. Oil field–produced water treatment: characterization, photochemical systems, and combined processes. Environ Sci Pollut Res 28, 52744–52763 (2021). https://doi.org/10.1007/s11356-021-16222-1

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  • DOI: https://doi.org/10.1007/s11356-021-16222-1

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