Hybrid sequential treatment of aromatic hydrocarbon-polluted effluents using non-ionic surfactants as solubilizers and extractants

M. S. Álvarez, F. Moscoso, A. Rodríguez, M. A. Sanromán, F. J. Deive

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A treatment train combining a biological and a physical approach was investigated for the first time in order to remediate polycyclic aromatic hydrocarbons (PAHs)-polluted effluents. Given the hydrophobic nature of these contaminants, the presence of non-ionic surfactants is compulsory to allow their bioavailability. The presence of these surfactants also entails an advantage in order to ease contaminant removal by the formation of aqueous two-phase systems (ATPS). The segregation ability of environmentally benign salts such as potassium tartrate, citrate, and oxalate was discussed for extracting phenanthrene (PHE), pyrene (PYR), and benzo[a]anthracene (BaA). The biological remediation efficiency reached circa 60% for PHE and PYR, and more than 80% for BaA. The coupling of ATPS subsequent stage by using potassium citrate allowed increasing the total PAH remediation yields higher than 97% of PAH removal. The viability of the proposed solution was investigated at industrial scale by using the software tool SuperPro Designer.

Original languageEnglish
Pages (from-to)259-265
Number of pages7
JournalBioresource Technology
Volume162
DOIs
Publication statusPublished - 2014

Keywords

  • ATPS
  • Benzoanthracene
  • Effluent treatment
  • Phenanthrene
  • Pyrene

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