Abstract
In this study, solar photo-Fenton reaction using compound parabolic collectors reactor was assessed for removal of phenol from aqueous solution. The effect of irradiation time, initial concentration, initial pH, and dosage of Fenton reagent were investigated. H2O2 and aromatic intermediates (catechol, benzoquinone, and hydroquinone) were quantified during the reaction to study the pathways of the oxidation process. Complete degradation of phenol was achieved after 45 min of irradiation when the initial concentration was 100 mg/L. However, increasing the initial concentration up to 500 mg/L inhibited the degradation efficiency. The dosage of H2O2 and Fe+2 significantly affected the degradation efficiency of phenol. The observed optimum pH for the reaction was 3.1. Phenol degradation at different concentration was fitted to the pseudo-first order kinetic according to Langmuir–Hinshelwood model. Costs estimation for a large scale reactor based was performed. The total costs of the best economic condition with maximum degradation of phenol are 2.54 €/m3.
Highlights
Phenol is one of the most prevalent pollutants in the wastewater of many industries such as resin industry, pharmaceuticals, polymerization inhibitors, petrochemical, paint, textile, oil refineries, antioxidants, and flavoring agents (Gernjak et al 2003; Ayodele et al 2012)
The results obtained indicated that increasing the initial concentration of phenol detracted the degradation efficiency and prolonged irradiation time is needed for complete degradation
The results revealed that increasing the dosage of H2O2 improved the degradation efficiency of phenol
Summary
Phenol is one of the most prevalent pollutants in the wastewater of many industries such as resin industry, pharmaceuticals, polymerization inhibitors, petrochemical, paint, textile, oil refineries, antioxidants, and flavoring agents (Gernjak et al 2003; Ayodele et al 2012). Phenol is very toxic pollutant and considered as carcinogenic material that seriously endangers public health (Yang and Long 1999; Bekkouche et al 2004). Because of its toxicity and low biodegradability, conventional biological treatment is not recommended as it needs long hydraulic retention time, nutrient addition and culture phenol degrading bacteria Hollow fiber supported liquid membrane and bulk liquid membranes (BLK) proved high efficiency, lower energy consumption, and lower costs (Pancharoen et al 2011; Wannachod et al 2014). These technologies are still not spread in some of developed countries
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