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Article

Removal of Phenolic Compounds from Olive Mill Wastewater by a Polydimethylsiloxane/oxMWCNTs Porous Nanocomposite

1
Department of Biological and Environmental Sciences and Technologies (Di.S.Te.B.A.), University of Salento, Via Monteroni, 73100 Lecce, Italy
2
CNR-NANOTEC Institute of Nanotechnology, Via Monteroni, 73100 Lecce, Italy
*
Authors to whom correspondence should be addressed.
Water 2020, 12(12), 3471; https://doi.org/10.3390/w12123471
Received: 13 November 2020 / Revised: 5 December 2020 / Accepted: 7 December 2020 / Published: 10 December 2020
(This article belongs to the Special Issue Adsorbents for Water and Wastewater Treatment and Resource Recovery)
User-friendly and energy-efficient methods able to work in noncontinuous mode for in situ purification of olive mill wastewater (OMW) are necessary. Herein we determined the potential of oxidized multiwalled carbon nanotubes entrapped in a microporous polymeric matrix of polydimethylsiloxane in the removal and recovery of phenolic compounds (PCs) from OMW. The fabrication of the nanocomposite materials was straightforward and evidenced good adsorption capacity. The adsorption process is influenced by the pH of the OMW. Thermodynamic parameters evidenced the good affinity of the entrapped nanomaterial towards phenols. Furthermore, the kinetics and adsorption isotherms are studied in detail. The presence of oil inside the OMW can speed up the uptake process in batch adsorption experiments with respect to standard aqueous solutions, suggesting a possible use of the nanocomposite for fast processing of OMW directly in the tank where they are stored. Moreover, the prepared nanocomposite is safe and can be easily handled and disposed of, thus avoiding the presence of specialized personnel. After the adsorption process the surface of the nanomaterial can be easily regenerated by mild treatments with diluted acetic acid, thus permitting both the recyclability of the nanomaterial and the recovery of phenolic compounds for a possible use as additives in food and nutraceutical industries and the recovery of OMW for fertirrigation. View Full-Text
Keywords: olive mill wastewater; carbon nanotubes; polydimethilsiloxane; waste treatment; phenolic compounds; resources recovery olive mill wastewater; carbon nanotubes; polydimethilsiloxane; waste treatment; phenolic compounds; resources recovery
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MDPI and ACS Style

Turco, A.; Malitesta, C. Removal of Phenolic Compounds from Olive Mill Wastewater by a Polydimethylsiloxane/oxMWCNTs Porous Nanocomposite. Water 2020, 12, 3471. https://doi.org/10.3390/w12123471

AMA Style

Turco A, Malitesta C. Removal of Phenolic Compounds from Olive Mill Wastewater by a Polydimethylsiloxane/oxMWCNTs Porous Nanocomposite. Water. 2020; 12(12):3471. https://doi.org/10.3390/w12123471

Chicago/Turabian Style

Turco, Antonio, and Cosimino Malitesta. 2020. "Removal of Phenolic Compounds from Olive Mill Wastewater by a Polydimethylsiloxane/oxMWCNTs Porous Nanocomposite" Water 12, no. 12: 3471. https://doi.org/10.3390/w12123471

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