Solar photocatalytic thin film cascade reactor for treatment of benzoic acid containing wastewater

Chan, Alex; Chan, Chak Keung; Barford, J. P.; Porter, John F.

doi:10.1016/s0043-1354(02)00465-7

Cited by 100 publications

(51 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, metallic ions concentration decreased as the rate of reaction proceeds. Figures 6 and 7 illustrate a positive relationship between TiO2 loading and the reduction of Cr (VI) and Cr (II); this behavior is almost attributed to the increase of metallic ions adsorption on catalyst surface with However the reduction rate decreased as the catalyst loading increased from (1.3 to 1.7) g/L, this phenomenon may be explained by the light scattering, caused by the lightproof of high concentration of suspended catalyst [18,20]. It is worth notice that the efficiency of ion reduction for Cr (VI) at 120 min was 92% and 94% at 1.3 g TiO2/L and 0.9 g TiO2/L, respectively.…”

Section: Effect Of Catalyst Loadingmentioning

confidence: 92%

Removal of Cr (VI) and Cu (II) Ions from Synthetic Wastewater by Solar Photocatalytic Reactor

Abid¹,

Mahmood²,

Hamza³

et al. 2018

ETJ

View full text Add to dashboard Cite

Abstract-Heavy metal ions in wastewater have promoted increasing concern on environmental and health risks. The present work was devoted to investigate the feasibility of utilizing solar light to degrade Cr (VI) and Cu (II) ions in synthetic wastewater. The effect of the key process parameters on the quality of product was studied by varying the pH (3,5,7,9,and 11), H2O2 (50, 100, 200, and 300 mg/L) and TiO2 loading (0.9, 1.3, and 1.7

show abstract

Section: Effect Of Catalyst Loadingmentioning

confidence: 92%

Removal of Cr (VI) and Cu (II) Ions from Synthetic Wastewater by Solar Photocatalytic Reactor

Abid¹,

Mahmood²,

Hamza³

et al. 2018

ETJ

View full text Add to dashboard Cite

show abstract

“…A pilot scale thin film cascade reactor consisting of nine stainless steel plates (17.5 cm × 28 cm each) was developed. The plates were coated with TiO2 using electrophoretic method resulting in a catalyst loading of 0.89 mg/cm 2 [106]. Electrophoretic deposition method requires plates degreasing, and then etching with nitric acid.…”

Section: Thin Film Cascade Photoreactormentioning

confidence: 99%

“…Waterfall effect of the cascade photoreactor offer turbulence that reduce mass transfer limitations and enhance oxygen transfer [106].…”

Section: Thin Film Cascade Photoreactormentioning

confidence: 99%

TiO2 Solar Photocatalytic Reactor Systems: Selection of Reactor Design for Scale-up and Commercialization—Analytical Review

2016

View full text Add to dashboard Cite

For the last four decades, viability of photocatalytic degradation of organic compounds in water streams has been demonstrated. Different configurations for solar TiO 2 photocatalytic reactors have been used, however pilot and demonstration plants are still countable. Degradation efficiency reported as a function of treatment time does not answer the question: which of these reactor configurations is the most suitable for photocatalytic process and optimum for scale-up and commercialization? Degradation efficiency expressed as a function of the reactor throughput and ease of catalyst removal from treated effluent are used for comparing performance of different reactor configurations to select the optimum for scale-up. Comparison included parabolic trough, flat plate, double skin sheet, shallow ponds, shallow tanks, thin-film fixed-bed, thin film cascade, step, compound parabolic concentrators, fountain, slurry bubble column, pebble bed and packed bed reactors. Degradation efficiency as a function of system throughput is a powerful indicator for comparing the performance of photocatalytic reactors of different types and geometries, at different development scales. Shallow ponds, shallow tanks and fountain reactors have the potential of meeting all the process requirements and a relatively high throughput are suitable for developing into continuous industrial-scale treatment units given that an efficient immobilized or supported photocatalyst is used.

show abstract

“…Many research works have been reported in immobilizing the nanoparticles onto solid matrices (Li et al 2012c;Wang et al 2012;Zhang et al 1994). Photon conversion efficiency and mass transfer (Chan et al 2003;Shankar et al 2004) are the two important properties to be considered for the reactor design. The complex physical and chemical phenomena are involved in the interactions between the photons, catalyst and reactants which make modeling difficult.…”

Section: Nanophotocatalytic Reactorsmentioning

confidence: 99%

“…Researchers have developed models based on absorption scattering model of two-flux and sixflux theories. Dual slant-placed electrodes thin-film PC reactor (Xu et al 2013), solar PC thin-film cascade reactor (Chan et al 2003), dual rotating disk PC reactor (Shankar et al 2004), thin-film photoelectrocatalytic reactor (Xu et al 2009) and spinning disk reactor (Boiarkina et al 2013) have been developed in the recent years for the degradation of industrial pollutants. Though the …”

Section: Nanophotocatalytic Reactorsmentioning

confidence: 99%

Advanced approach for degradation of recalcitrant by nanophotocatalysis using nanocomposites and their future perspectives

Padmanaban¹,

Nandagopal

Priyadharshini³

et al. 2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Industrial effluents containing persistent pollutants play a significant role in environmental pollution. Classical techniques such as chlorination, coagulation, ion flotation, membrane process and sedimentation that have been used to decontaminate polluted water are incapable of efficient degradation due to the generation of secondary pollutants. Photocatalysis, an advanced oxidation process in which the photoreaction is accelerated by the irradiation of catalyst, has shown efficient degradation of recalcitrant in water system. Usage of nanoparticles as homogenous photocatalyst has become prevalent due to their improved properties such as large surface-to-volume ratio, controlled uniform particle size and its composition which enhances the degradation rate. The recombination of holes and electron pair which is considered to be the limitation in homogenous system can be overcome by nanocomposites or heterogeneous photocatalysts. This system decreases the rate of recombination, leading to effective degradation of individual pollutants because of their enhanced physicochemical and structural properties. In recent years, heterogeneous nanophotocatalytic processes employing titanium dioxide (TiO 2 ) and zinc oxide (ZnO) composites have gained immense research interest as an effective wastewater treatment method because of its efficacy in decomposing and mineralizing the hazardous organic and inorganic pollutants utilizing the UV and visible photons.This paper reviews about the process, synthesis and parameters influencing photocatalytic reaction and their kinetics with much emphasize on types of nanoparticles and nanocomposites and its application in wastewater treatment.

show abstract

Solar photocatalytic thin film cascade reactor for treatment of benzoic acid containing wastewater

Cited by 100 publications

References 15 publications

Removal of Cr (VI) and Cu (II) Ions from Synthetic Wastewater by Solar Photocatalytic Reactor

Removal of Cr (VI) and Cu (II) Ions from Synthetic Wastewater by Solar Photocatalytic Reactor

TiO2 Solar Photocatalytic Reactor Systems: Selection of Reactor Design for Scale-up and Commercialization—Analytical Review

Advanced approach for degradation of recalcitrant by nanophotocatalysis using nanocomposites and their future perspectives

Contact Info

Product

Resources

About