FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1991497690> ?p ?o ?g. }

• W1991497690 endingPage "461" @default.
• W1991497690 startingPage "453" @default.
• W1991497690 abstract "Photocatalytic oxidation using UV irradiation of TiO2 has been studied extensively and has many potential industrial applications, including the degradation of recalcitrant contaminants in water and wastewater treatment. A limiting factor in the oxidation process is the recombination of conduction band electrons (e − cb) with electron holes (h vb + ) on the irradiated TiO2 surface; thus, in aqueous conditions, the presence of an effective electron scavenger will be beneficial to the efficiency of the oxidation process. Ferrate (FeO 4 2− ) has received much recent attention as a water treatment chemical since it behaves simultaneously as an oxidant and coagulant. The combination of ferrate [Fe(VI)] with UV/TiO2 photocatalysis offers an oxidation synergism arising from the Fe(VI) scavenging of e − cb and the corresponding beneficial formation of Fe(V) from the Fe(VI) reduction. This paper reviews recent studies concerning the photocatalytic oxidation of problematic pollutants with and without ferrate. The paper reviews the published results of laboratory experiments designed to follow the photocatalytic degradation of selected contaminants of environmental significance and the influence of the experimental conditions (e.g. pH, reactant concentrations and dissolved oxygen). The specific compounds are as follows: ammonia, cyanate, formic acid, bisphenol-A, dibutyl- and dimethyl-phthalate and microcystin-LR. The principal focus in these studies has been on the rates of reaction rather than on reaction pathways and products. The presence of UV/TiO2 accelerates the chemical reduction of ferrate, and the reduction rate decreases with pH owing to deprotonation of ferrate ion. For all the selected contaminant substances, the photocatalytic oxidation rate was greater in the presence of ferrate, and this was believed to be synergistic rather than additive. The presence of dissolved oxygen in solution reduced the degradation rate of dimethyl phthalate in the ferrate/photocatalysis system. In the study of microcystin-LR, it was evident that an optimal ferrate concentration exists, whereby higher Fe(VI) concentrations above the optimum leads to a reduction in microcystin-LR degradation. In addition, the rate of microcystin-LR degradation was found to be strongly dependent on pH and was greatest at pH 6. The initial rate of photocatalytic reduction under different conditions was analysed using a Langmuirian form. Decrease in rates in the presence of dissolved oxygen may be due to competition between oxygen and ferrate as electron scavengers and to non-productive radical species interactions. The reaction between ferrate(VI) and microcystins-LR in the pH range of 6.0–10.0 is most likely controlled by the protonated Fe(VI) species, HFeO 4 − . The photocatalytic oxidation of selected, recalcitrant contaminants was found to be significantly greater in the presence of ferrate, arising from the role of ferrate in inhibiting the h vb + –e − cb pair recombination on TiO2 surfaces and the corresponding generation of highly oxidative Fe(V) species. The performance of the ferrate/photocatalysis system is strongly influenced by the reaction conditions, particularly the pH and dissolved oxygen concentration, arising from the complex nature of the interactions between the catalyst and the solution. Overall, the treatment performance of the Fe(VI)–TiO2–UV system is generally superior to alternative chemical oxidation methods. The formation of intermediate Fe(V) species in the photocatalytic reduction of ferrate(VI) requires confirmation, and a method involving electron paramagnetic resonance spectroscopy could be applied for this. The reactivity of Fe(V) with the selected contaminants is required in order to better understand the role of ferrate in the Fe(VI)–TiO2–UV oxidation system. To increase the practical utility of the system, it is recommended that future studies involving the photocatalytic oxidation of pollutants in the presence of ferrate(VI) should focus on developing modified TiO2 surfaces that are photocatalytic under visible light conditions." @default.
• W1991497690 created "2016-06-24" @default.
• W1991497690 creator A5001769021 @default.
• W1991497690 creator A5015001050 @default.
• W1991497690 creator A5047551355 @default.
• W1991497690 creator A5059806744 @default.
• W1991497690 date "2009-06-03" @default.
• W1991497690 modified "2023-10-17" @default.
• W1991497690 title "Ferrate(VI) enhanced photocatalytic oxidation of pollutants in aqueous TiO2 suspensions" @default.
• W1991497690 cites W1965563139 @default.
• W1991497690 cites W1968662027 @default.
• W1991497690 cites W1970191387 @default.
• W1991497690 cites W1970532758 @default.
• W1991497690 cites W1976370068 @default.
• W1991497690 cites W1978372176 @default.
• W1991497690 cites W1979001437 @default.
• W1991497690 cites W1984545760 @default.
• W1991497690 cites W1989131476 @default.
• W1991497690 cites W2000014348 @default.
• W1991497690 cites W2001083359 @default.
• W1991497690 cites W2004275960 @default.
• W1991497690 cites W2006604722 @default.
• W1991497690 cites W2010740002 @default.
• W1991497690 cites W2017929293 @default.
• W1991497690 cites W2018722355 @default.
• W1991497690 cites W2020780658 @default.
• W1991497690 cites W2024119706 @default.
• W1991497690 cites W2025336949 @default.
• W1991497690 cites W2029038363 @default.
• W1991497690 cites W2034133678 @default.
• W1991497690 cites W2038549349 @default.
• W1991497690 cites W2040810057 @default.
• W1991497690 cites W2041762849 @default.
• W1991497690 cites W2042492216 @default.
• W1991497690 cites W2047561944 @default.
• W1991497690 cites W2049885716 @default.
• W1991497690 cites W2051140315 @default.
• W1991497690 cites W2053360078 @default.
• W1991497690 cites W2058860855 @default.
• W1991497690 cites W2064347362 @default.
• W1991497690 cites W2067733927 @default.
• W1991497690 cites W2068471857 @default.
• W1991497690 cites W2072009938 @default.
• W1991497690 cites W2075355283 @default.
• W1991497690 cites W2080931034 @default.
• W1991497690 cites W2082171921 @default.
• W1991497690 cites W2083514444 @default.
• W1991497690 cites W2086222466 @default.
• W1991497690 cites W2091633783 @default.
• W1991497690 cites W2093537388 @default.
• W1991497690 cites W2119585240 @default.
• W1991497690 cites W2130941736 @default.
• W1991497690 cites W2465366600 @default.
• W1991497690 cites W2768797226 @default.
• W1991497690 cites W2953169970 @default.
• W1991497690 cites W4241456496 @default.
• W1991497690 cites W4242611261 @default.
• W1991497690 doi "https://doi.org/10.1007/s11356-009-0170-0" @default.
• W1991497690 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19495821" @default.
• W1991497690 hasPublicationYear "2009" @default.
• W1991497690 type Work @default.
• W1991497690 sameAs 1991497690 @default.
• W1991497690 citedByCount "54" @default.
• W1991497690 countsByYear W19914976902012 @default.
• W1991497690 countsByYear W19914976902013 @default.
• W1991497690 countsByYear W19914976902014 @default.
• W1991497690 countsByYear W19914976902015 @default.
• W1991497690 countsByYear W19914976902016 @default.
• W1991497690 countsByYear W19914976902017 @default.
• W1991497690 countsByYear W19914976902018 @default.
• W1991497690 countsByYear W19914976902019 @default.
• W1991497690 countsByYear W19914976902020 @default.
• W1991497690 countsByYear W19914976902021 @default.
• W1991497690 countsByYear W19914976902022 @default.
• W1991497690 countsByYear W19914976902023 @default.
• W1991497690 crossrefType "journal-article" @default.
• W1991497690 hasAuthorship W1991497690A5001769021 @default.
• W1991497690 hasAuthorship W1991497690A5015001050 @default.
• W1991497690 hasAuthorship W1991497690A5047551355 @default.
• W1991497690 hasAuthorship W1991497690A5059806744 @default.
• W1991497690 hasBestOaLocation W19914976902 @default.
• W1991497690 hasConcept C107872376 @default.
• W1991497690 hasConcept C127413603 @default.
• W1991497690 hasConcept C161790260 @default.
• W1991497690 hasConcept C178790620 @default.
• W1991497690 hasConcept C179104552 @default.
• W1991497690 hasConcept C184651966 @default.
• W1991497690 hasConcept C185592680 @default.
• W1991497690 hasConcept C190960625 @default.
• W1991497690 hasConcept C2778217819 @default.
• W1991497690 hasConcept C2779679103 @default.
• W1991497690 hasConcept C41008148 @default.
• W1991497690 hasConcept C65165184 @default.
• W1991497690 hasConcept C76155785 @default.
• W1991497690 hasConcept C87717796 @default.
• W1991497690 hasConceptScore W1991497690C107872376 @default.
• W1991497690 hasConceptScore W1991497690C127413603 @default.
• W1991497690 hasConceptScore W1991497690C161790260 @default.

• next