Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process

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. H 2 O 2 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 H 2 O 2 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 €/ m 3 .

Comparative analysis of the environmental impacts of solar photo-Fenton and photocatalysis methods for treatment of phenolic wastewater on life-cycle basis. (Dept. C.)

“…And its high performance for removal of phenol leads to lower emissions in the effluent. Electricity caused most impact categories as shown in Fig.6 (a) [9].…”

“…This research aims to study and compare the environmental impacts of solar photo-Fenton and TiO2 photocatalysis. As shown in Table 1, the used reactor in the solar photo-Fenton method is compound parabolic collectors 700m and the time of reaction is 80 min [9]. In solar photocatalysis, the used reactor is composed of compound parabolic collectors of 2060 m length and the time of reaction is 250 min [10].…”

“…The different inputs, outputs, and energy forms are illustrated in Fig. 2 [9], [10]. The life span of the reactors has been assumed as 20 years includes equalization and chemical feeding tanks.…”

“…The life cycle inventories have been estimated based on the hydraulic designs of all reactors, which have been provided the reactor sizing, and the amounts of materials needed in the construction phase. A summary of the inventories of the two methods of treatment is illustrated in Table II [9], [10]. Mixing is consumed by γ Q H t T 75 η 1 η 2 × 745.7 Watt 1 Horse Power Where Q: flow rate inside the tubes, C: the friction coefficient of glass, D: the diameter of the pipes, A: the cross-sectional area of the pipes, Hf: the friction head loss, L: the length of the pipes, Hb: the bending head loss, v: the water velocity inside the pipes, g: the acceleration due to the gravity, γ: the specific weight of water, Ht: total losses (Hf+ Hb), and ηi: operation coefficients.…”

Improvement of Drinking Water Properties Using a Novel Biosorbent Material . (Dept.C)

“…Many researchers have used the adsorption by activated carbon and advanced oxidation processes for removing or degradation of different organics from water [9][10][11][12]. While, other researchers have developed low cost adsorbent materials that prepared from agricultural residues such as wheat straw [13], rice husk [14], peanut hull, coconut husk [15], black gram husk [16], Sawdust [17], sugarcane bagasse [14], banana pith [18], and pine grape stalk [16].…”