Pentachlorophenol Removal from Water by Soybean Peroxidase and Iron(II) Salts Concerted Action

• Published in: Water, air, and soil pollution Vol. 230; no. 6; pp. 1 - 8
• Main Authors: Tolardo, Valentina, García-Ballesteros, Sara, Santos-Juanes, Lucas, Vercher, Rosa, Amat, Ana M., Arques, Antonio, Laurenti, Enzo
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.06.2019; Springer; Springer Nature B.V
• Subjects: Acceleration; Aqueous solutions; Atmospheric Protection/Air Quality Control/Air Pollution; Climate Change/Climate Change Impacts; Drinking water; Earth and Environmental Science; Environment; Environmental monitoring; Hydrogen peroxide; Hydrogeology; Iron; Pentachlorophenol; Peroxidase; pH effects; Removal; Salts; Soil Science & Conservation; Soybeans; Water Quality/Water Pollution; Soybean peroxidase; Fenton; Pentachlorophenol; Iron; Hydrogen peroxide; Wastewater
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-019-4189-7

Soybean peroxidase (SBP) has been employed for the treatment of aqueous solutions containing pentachlorophenol (PCP) in the presence of hydrogen peroxide at pH range 5–7. Reaction carried out with 1 mg/L of PCP, 4 mg/L of H 2 O 2 , and 1.3 × 10 −9  M of SBP showed a fast initial elimination of PCP (ca. 30% in 20 min), but the reaction does not go beyond the removal of 50% of the initial concentration of PCP. Modification in SBP and PCP amounts did not change the reaction profile and higher amounts of H 2 O 2 were detrimental for the reaction. Addition of Fe(II) to the system resulted in an acceleration of the process to reach nearly complete PCP removal at pH 5 or 6; this is more probably due to a synergetic effect of the enzymatic process and Fenton reaction. However, experiments developed in tap water resulted in a lower PCP elimination, but this inconvenience can be partly overcome by leaving the tap water overnight in an open vessel before reaction.