Photocatalytic reaction by Fe(III)–citrate complex and its effect on the photodegradation of atrazine in aqueous solution

Ou, Xiaoxia; Quan, Xie; Chen, Shuo; Zhang, Fengjie; Zhao, Yongjie

doi:10.1016/j.jphotochem.2008.02.001

Cited by 112 publications

(59 citation statements)

References 37 publications

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“…It is well accepted that photodegradation of a trace organic compound in aqueous solution follows the first-order kinetic model well under photolytic treatment due to the relatively low substrate concentration compared to the quantum yields. [31,37] As expected, the photodegradation data of BT, , oxalate, tartrate, succinate and citrate: 100 mmol L À1 each) at a pH of 3-9. The highest photodegradation efficiency was found at pH 3 in all cases.…”

Section: Resultssupporting

confidence: 67%

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Photodegradation of three benzotriazoles induced by four FeIII–carboxylate complexes in water under ultraviolet irradiation

et al. 2013

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Environmental context. Benzotriazoles are chemicals widely used to inhibit corrosion in various industrial processes and in household products. They persist in aquatic environments, even under UV irradiation, and thus there is a need to improve their photolytic degradation to minimise the environmental exposure risks. We investigated the effects of four iron-carboxylate complexes on the UV photodegradation of three benzotriazoles in aqueous solutions and show that they significantly increase the degradation rates of benzotriazoles.Abstract. The effects of Fe III -carboxylate complexes on the photodegradation of three benzotriazoles (BTs), i.e. benzotriazole (BT), 5-methylbenzotriazole (5-TTri) and 5-chlorobenzotriazole (CBT) in aqueous solutions were investigated under exposure to UV irradiation at 254 nm in the presence of Fe III and four carboxylate ions (oxalate, tartrate, succinate and citrate). The results showed that the presence of Fe III -carboxylate complexes significantly enhanced the photodegradation rates of all three selected BTs. The photodegradation of BT, 5-TTri and CBT followed first-order reaction kinetics with half-lives ranging from 0.57 to 3.98 h for BT, 6.08 to 8.25 h for 5-TTri and 2.63 to 5.50 h for CBT in the four systems of the Fe III -carboxylate complexes. In comparison, the half-lives ranged between 3.40 and 4.81 h for BT, 6.42 and 11.55 h for 5-TTri and 4.13 and 6.79 h for CBT in pure aqueous solution and in the presence of Fe III or carboxylate. The degradation rates of these BTs were dependent on the pH values, type of carboxylate and Fe III / carboxylate ratios. Both BT and CBT showed the highest photodegradation rates with the shortest respective half-lives of 0.57 and 2.63 h at the initial Fe III /oxalate ratio of 10/200 mmol L À1 in aqueous solutions at pH 3, whereas 5-TTri had the highest photodegradation rate with the shortest half life of 6.08 h at the initial Fe III /succinate ratio of 10/10 mmol L À1 .

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Section: Resultssupporting

confidence: 67%

“…[28,29] Fe III -citrate and Fe III -oxalate complexes were found to enhance the photodegradation of organic compounds such as atrazine, dyes, bisphenol A and diethylstilbestrol. [31,[35][36][37] ) of BT and 5-TTri were prepared in ultra pure water (Milli-Q, Guangzhou, Guangdong, China), and CBT (100 mg L…”

mentioning

confidence: 99%

Photodegradation of three benzotriazoles induced by four FeIII–carboxylate complexes in water under ultraviolet irradiation

et al. 2013

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“…This oxidation reaction was also affected by peroxydisulphate in presence of cobalt(II) [19]. Photocatalytic reaction by Fe(III)-citrate complex and its effect on the photodegradation of atrazine in aqueous solution was observed by Ou et al [20]. Pretzer et al [21] reported the effect of Pt oxidation state and concentration on the photocatalytic removal of aqueous ammonia with Pt-modified titania.…”

Section: Introductionmentioning

confidence: 91%

Silver(I) Catalyzed Photochemical Oxidation of Methylene Blue and Safranine-O by Peroxydisulphate: A Green Chemical Approach

Chhajed

Sharma

Ameta

et al. 2014

International Journal of Photochemistry

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In the present investigation, a comparative study of silver(I) catalysed photochemical oxidation of methylene blue (MB) and safranine-O (SO) by peroxydisulphate has been reported. The effect of different parameters, such as pH, concentration of peroxydisulphate, silver nitrate, and light intensity, on the reaction rate has been observed. The progress of the photochemical oxidation was monitored spectrophotometrically. The optimum conditions for photochemical oxidation were achieved. The dyes were completely oxidized and degraded into CO 2 and H 2 O. A tentative mechanism for silver(I) catalyzed photochemical oxidation of these dyes by peroxydisulphate has also been proposed.

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“…These complexes not only play an essential role in the migration and transformation of pollutants in the environment, but also are feasible in disposing organic pollutants [11][12][13][14] and high valent heavy metals. 15,16 It has been previously revealed that some photoactive Fe(III)-carboxylate complexes could decompose into Fe(II) and carboxyl free radicals under irradiation, and then many intermediate products such as H 2 O 2 , HO 2 · /O 2 − · and ·OH were produced from the secondary photochemcal process of carboxyl free radicals.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Reduction of Hexavalent Chromium Induced by Photolysis of Ferric/tartrate Complex

Feng¹,

Ding²,

Zhang³

2012

Bulletin of the Korean Chemical Society

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Photocatalytic reduction of hexavalent chromium (Cr(VI)) in ferric-tartrate system under irradiation of visible light was investigated. Effects of light resources, initial pH value and initial concentration of various reactants on Cr(VI) photocatalytic reduction were studied. Photoreaction kinetics was discussed and a possible photochemical pathway was proposed. The results indicate that Fe(III)-tartrate system is able to rapidly and effectively photocatalytically reduce Cr(VI) utilizing visible light. Initial pH variations resulte in the concentration changes of Fe(III)-tartrate complex in this system, and pH at 3.0 is optimal for Cr(VI) photocatalytic reduction. Efficiency of Cr(VI) photocatalytic reduction increases with increasing initial concentrations of Cr(VI), Fe(III) and tartrate. Kinetics analysis indicates that initial Fe(III) concentration affects Cr(VI) photoreduction most significantly.

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Photocatalytic reaction by Fe(III)–citrate complex and its effect on the photodegradation of atrazine in aqueous solution

Cited by 112 publications

References 37 publications

Photodegradation of three benzotriazoles induced by four FeIII–carboxylate complexes in water under ultraviolet irradiation

Photodegradation of three benzotriazoles induced by four FeIII–carboxylate complexes in water under ultraviolet irradiation

Silver(I) Catalyzed Photochemical Oxidation of Methylene Blue and Safranine-O by Peroxydisulphate: A Green Chemical Approach

Photocatalytic Reduction of Hexavalent Chromium Induced by Photolysis of Ferric/tartrate Complex

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