Modeling of an external light irradiation slurry photoreactor: UV light or sunlight-photoassisted Fenton discoloration of azo-dye Orange II with natural mineral tourmaline powder

Photodegradation of textile dyes in the presence of an aqueous suspension of semiconductor oxides has been of growing interest. Although this method of destruction of dyes is efficient, the main obstacle of applying this technique in the industry is the time and cost involving separation of oxides from an aqueous suspension. In this research, an attempted was made to develop ZnO films on a glass substrate by simple immobilization method for the adsorption and photodegradation of a typical dye, Remazol Red R (RRR) from aqueous solution. Adsorption and photodegradation of RRR were performed in the presence of glass supported ZnO film. Photodegradation of the dye was carried out by varying different parameters such as the catalyst dosage, initial concentrations of RRR, and light sources. The percentage of adsorption as well as photodegradation increased with the amount of ZnO, reaches a maximum and then decreased. Maximum degradation has been found under solar light irradiation as compared to UV-light irradiation. Removal efficiency was also found to be influenced by the pre-sonication of ZnO suspension.

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Wastewater Derived Dissolved Organic Nitrogen Removal using Integrated System of Biological Reactors and UV light Irradiation

Proceedings of the Water Environment Federation ◽

10.2175/193864716819713286 ◽

2016 ◽

Vol 2016 (9) ◽

pp. 4958-4968

Author(s):

Swati Sharma ◽

Donald L Tucker ◽

Halis Simsek

Keyword(s):

Nitrogen Removal ◽

Dissolved Organic Nitrogen ◽

Organic Nitrogen ◽

Uv Light ◽

Integrated System ◽

Light Irradiation ◽

Uv Light Irradiation

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Synthesis, characterization and photocatalytic activities of Al-doped ZnO for degradation of methyl orange dye under UV light irradiation

Journal of the Australian Ceramic Society ◽

10.1007/s41779-020-00541-6 ◽

2021 ◽

Author(s):

Hartini Ahmad Rafaie ◽

Nur Aliyah Alwani Mohd Nazam ◽

Nurul Infaza Talalah Ramli ◽

Ruziana Mohamed ◽

Muhd Firdaus Kasim

Keyword(s):

Methyl Orange ◽

Uv Light ◽

Light Irradiation ◽

Uv Light Irradiation ◽

Photocatalytic Activities ◽

Methyl Orange Dye ◽

Doped Zno ◽

Degradation Of Methyl Orange

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TiO2-Powdered Activated Carbon (TiO2/PAC) for Removal and Photocatalytic Properties of 2-Methylisoborneol (2-MIB) in Water

Water ◽

10.3390/w13121622 ◽

2021 ◽

Vol 13 (12) ◽

pp. 1622

Author(s):

Xiao-Pin Guo ◽

Peng Zang ◽

Yong-Mei Li ◽

Dong-Su Bi

Keyword(s):

Activated Carbon ◽

Natural Organic Matter ◽

Uv Light ◽

Sol Gel ◽

Light Irradiation ◽

Nano Tio2 ◽

Uv Light Irradiation ◽

Adsorption Capacities ◽

Taste And Odor ◽

Composite Photocatalysts

2-methylisoborneol (2-MIB) is a common taste and odor compound caused by off-flavor secondary metabolites, which represents one of the greatest challenges for drinking water utilities worldwide. A TiO2-coated activated carbon (TiO2/PAC) has been synthesized using the sol-gel method. A new TiO2/PAC photocatalyst has been successfully employed in photodegradation of 2-MIB under UV light irradiation. In addition, the combined results of XRD, SEM-EDX, FTIR and UV-Vis suggested that the nano-TiO2 had been successfully loaded on the surface of PAC. Experimental results of 2-MIB removal indicated that the adsorption capacities of PAC for 2-MIB were higher than that of TiO2/PAC. However, in the natural organic matter (NOM) bearing water, the removal efficiency of 2-MIB by TiO2/PAC and PAC were 97.8% and 65.4%, respectively, under UV light irradiation. Moreover, it was shown that the presence of NOMs had a distinct effect on the removal of MIB by TiO2/PAC and PAC. In addition, a simplified equivalent background compound (SEBC) model could not only be used to describe the competitive adsorption of MIB and NOM, but also represent the photocatalytic process. In comparison to other related studies, there are a few novel composite photocatalysts that could efficiently and rapidly remove MIB by the combination of adsorption and photocatalysis.

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