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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Assessment of the improved performance of magnetite-modified vermiculite in the reduction of BTEX and metals, as well as toxicity in petroleum-produced water

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Author(s):
Bartilotti, Mariana [1] ; Viana, Tais S. [2] ; de Oliveira, Danielle P. [2] ; Santos, V, Elisama ; Rojas-Mantilla, Hernan D. [1] ; Santos, Mirian C. [1] ; Zanoni, Maria Valnice B. [1]
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ, UNESP, Natl Inst Sci & Technol Detect Toxicol Evaluat &, Inst Chem, BR-14800900 Araraquara, SP - Brazil
[2] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, BR-14040903 Ribeirao Preto, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF WATER PROCESS ENGINEERING; v. 39, FEB 2021.
Web of Science Citations: 0
Abstract

Petroleum-produced water has raised considerable environmental concerns due to the large amount of contaminants-containing wastewater, generated during petrol and gas extraction. The present work proposes for the first time the use of vermiculite modified by magnetite (Fe3O4) nanoparticles (VMT-mag) as adsorbent for the extraction of metals and BTEX (benzene, toluene, ethylbenzene, and xylene) pollutants and toxicity reduction. Thermally-treated vermiculite was modified by Fe(3)O(4 )nanoparticles of 20 nm, which were strongly adhered to the surface, contributing to the magnetization of the material and adsorption of the metals. A 5 min exposure of wastewater to VMT-mag at 15 mg mL(-1) led to the removal of 93 % of dissolved organic carbon, 85 % of BTEX compounds, and a reduction of 30-87% of metals (Ba, Al, Ag, Hg and Pb) at low concentration. An investigation was also conducted regarding the efficiency of VMT-mag in reducing toxicity via toxicity assays using the water flea Daphnia similis (ABTN NBR 12713 protocol); the results showed a reduction of Lethal Concentration at 50 % death (LC50) from 5.80 (v/v) to 13.3 % (v/v), respectively, for the samples before and after treatment. The findings show that the application of the proposed VMT-mag can lead to a significant reduction of toxicity and the removal of BTEX and metals in petroleum-produced water. (AU)

FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support Opportunities: Research Projects - Thematic Grants