2014
DOI: 10.1080/19443994.2013.834522
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Solar photocatalytic treatment of phenolic wastewaters: influence of chlorides, sulphates, aeration, liquid volume and solar light intensity

Abstract: A B S T R A C TThe solar photocatalytic treatment of phenolic wastewater over TiO 2 suspensions was investigated. The study focused on the effect of various operating parameters on the treatment efficiency including chlorides (50-200 mg/L), sulphates (50-200 mg/L), aeration (pre-aeration, with and without aeration), liquid volume (0.25-1.5 L) and solar light intensity (throughout the year). The presence of chloride and sulphate ions decreased the degradation rate of phenol due to a decrease in the adsorption o… Show more

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Cited by 16 publications
(7 citation statements)
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“…Similar results were observed, which stated that photocatalytic performance was triggered by the excess amount of oxygen in aeration [23]. The presence of oxygen enhanced photocatalytic degradation since it will react with conduction band electrons to form superoxide radial anions which eventually yield reactive •OH [24].…”
Section: Effect Of Aerationsupporting
confidence: 75%
“…Similar results were observed, which stated that photocatalytic performance was triggered by the excess amount of oxygen in aeration [23]. The presence of oxygen enhanced photocatalytic degradation since it will react with conduction band electrons to form superoxide radial anions which eventually yield reactive •OH [24].…”
Section: Effect Of Aerationsupporting
confidence: 75%
“…Moreover, due to the complexity of the processes, a combination of mechanisms is often claimed to explain the inhibiting effect [5,13,[39][40][41].…”
Section: Resultsmentioning
confidence: 99%
“…34 Often, more than one mechanism is used to explain the inhibiting effect. 3540 In addition, aggregation of TiO 2 particles has been reported to reduce the number of absorbed photons influencing degradation rates. 41 While the inhibiting effect of chloride, using TiO 2 as photocatalyst, has been discussed frequently in the literature, detailed studies regarding the formation of reactive chlorine species (RCS), such as hypochlorite, and chlorinated intermediates in aqueous solution (starting from a nonchlorinated parent molecule) are rare, and the obtained results seem to be inconsistent.…”
Section: Introductionmentioning
confidence: 99%