Photocatalytic degradation of humic acid in saline waters. Part 1. Artificial seawater: influence of TiO 2 , temperature, pH, and air-flow

Al-Rasheed, Radwan; Cardin, D. J.

doi:10.1016/s0045-6535(03)00097-3

Cited by 74 publications

(49 citation statements)

References 30 publications

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“…The processing or desalination of natural seawater converted to drinking water by using various methods are increasing throughout the world [1]. Seawater becomes the main water source worldwide.…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Temperature on Performance of Photocatalytic Reactor System for Seawater Pretreatment

Kan

Roslan

Isha

2016

Bull. Chem. React. Eng. Catal.

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Conservative desalination technology including distillation requires high energy and cost to operate. Hence, pretreatment process can be done prior to desalination to overcome energy demand and cost reduction. Objective of this research is to study the effect of calcination temperature of hybrid catalyst in photocatalytic reactor system in the seawater desalination, i.e. salt removal in the seawater. The catalyst was synthesized via wet impregnation method with 1:1 weight ratio of TiO2 and activated oil palm fiber ash (Ti:Ash). The catalyst was calcined at different temperature, i.e. 500 o C and 800 o C. The study was carried out in a one liter Borosilicate photoreactor equipped with mercury light of 365 nanometers for two hours with 400 rpm mixing and catalyst to seawater sample weight ratio of 1:400. The Chemical Oxygen Demand (COD), pH, dissolved oxygen (DO), turbidity and conductivity of the seawater were analyzed prior and after the testing. The fresh and spent catalysts were characterized via X-Ray Diffractogram (XRD and Nitrogen physisorption analysis. The calcination temperature significantly influenced the adsorption behaviour and photocatalytic activity. However, Ti:Ash which calcined at 800 o C has less photocatalytic activity. It might be because the surface of fiber ash was sintered after calcined at high temperature. The Ti:Ash catalyst that calcined at 500 o C was found to be the most effective catalyst in the desalination of seawater by reducing the salt concentration of more than 9 % compared to Ti:Ash calcined at 800 o C. It can be concluded that catalyst calcination at 500 °C has better character, performance and economically feasible catalyst for seawater desalination.

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Section: Introductionmentioning

confidence: 99%

Effect of Calcination Temperature on Performance of Photocatalytic Reactor System for Seawater Pretreatment

Kan

Roslan

Isha

2016

Bull. Chem. React. Eng. Catal.

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“…Although many studies have been reported on the photocatalytic degradation of pollutants in distilled water suspensions, only few investigations on the photocatalytic activity of catalysts have been performed in domestic [16] and natural water [17] sources. The very common pollutant properties of industrial effluents are attributed to phenolic compounds.…”

Section: Introductionmentioning

confidence: 99%

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Nahar¹,

Hasegawa

Kagaya

et al. 2007

Science and Technology of Advanced Materials

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Fe-doped TiO 2 particles responding to visible light were synthesized by impregnation and calcination method using TiO 2 particle and Ti element, respectively. The optical and the chemical properties were characterized by measuring the X-ray diffraction (XRD) and UV-visible spectroscopy. The onset of absorption shifted to longer wavelengths on doping TiO 2 by the calcination process, which showed a better response as compared to the impregnation method. The photocatalytic reactivity was evaluated by the degradation of phenol with impregnated Fe-doped (0.5% w/w in Fe) and calcined Fe-doped (Fe x Ti 1Àx O 2 , x ¼ 0.005 (Fe/Ti molar ratio)) TiO 2 separately in distilled and tap water. The characterization results have confirmed the advanced possibility of correlation between photoactivity and the special property of sulfur-containing calcined Fe-doped TiO 2 . In case of the coagulation of the undoped A-I and the Fe-doped B-I, the photoactivity showed a decrease due to the presence of natural electrolytes and due to the high pH of tap water, whereas in the case of the coagulation of calcined Fe-doped TiO 2 prepared from sulfides (Fe x TiS 2 ), the photoactivity showed an increase. In this study, highest catalytic activity was found to be strongly dependent both on catalyst structure and on the type of water used.

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“…The decrease of efficiency of the photochemical degradation process of low-and high-molecular weight compounds was also proved in a wide range of other papers on this subject [30][31][32][33][34][35]. Moreover, the irradiation of the sulphate ions resulted in the generation of reactive sulphate anion radicals SO…”

Section: Influence Of Inorganic Anionsmentioning

confidence: 85%

Influence of Inorganic Ions and Organic Substances on the Degradation of Pharmaceutical Compound in Water Matrix

Kudlek

Dudziak

Bohdziewicz

2016

Water

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Abstract:The paper determined the influence of inorganic substances and high-molecular organic compounds on the decomposition of diclofenac, ibuprofen, and carbamazepine in the process of photocatalysis conducted with the presence of Titanium dioxide (TiO 2 ). It was determined that the presence of such ions as CO affected the increase of reaction rate constant value of diclofenac and ibuprofen decomposition. On the other hand, high molecular organic compounds present in the model effluent additionally catalysed the degradation process of pharmaceutical compounds and constituted an additional sorbent that enabled to decrease their concentration. Toxicological analysis conducted in deionized water with pharmaceutical compounds' patterns proved the production of by-products from oxidation and/or reduction of micropollutants, which was not observed for model effluent irradiation.

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Photocatalytic degradation of humic acid in saline waters. Part 1. Artificial seawater: influence of TiO 2 , temperature, pH, and air-flow

Cited by 74 publications

References 30 publications

Effect of Calcination Temperature on Performance of Photocatalytic Reactor System for Seawater Pretreatment

Effect of Calcination Temperature on Performance of Photocatalytic Reactor System for Seawater Pretreatment

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Influence of Inorganic Ions and Organic Substances on the Degradation of Pharmaceutical Compound in Water Matrix

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Photocatalytic degradation of humic acid in saline waters. Part 1. Artificial seawater: influence of TiO 2 , temperature, pH, and air-flow

Cited by 74 publications

References 30 publications

Effect of Calcination Temperature on Performance of Photocatalytic Reactor System for Seawater Pretreatment

Effect of Calcination Temperature on Performance of Photocatalytic Reactor System for Seawater Pretreatment

Comparative assessment of the efficiency of Fe-doped TiO2prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Influence of Inorganic Ions and Organic Substances on the Degradation of Pharmaceutical Compound in Water Matrix

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Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions