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Bharatpur, India

Sharma S.,Msjcollege | Chaturvedi N.,Msjcollege | Chaturvedi R.K.,Msjcollege | Sharma M.K.,Msjcollege
Journal of Industrial Pollution Control | Year: 2010

The ammonium phosphomolybdate-mediated photocatalytic degradation of janus green B was investigated in aqueous solution of dye by monitoring the change in colour. The effect of various parameters such as janus green B concentration, amount of photocatalyst, pH, light intensity, etc. on the rate of photodegradation of janus green B was investigated. The photocatalytic degradation of dye followed pseudo-first order kinetics. Photodegradation was followed spectrophotometrically at Xmax = 615 nm. A maximum color removal of 97.9% was achieved in 4 hours. The mechanism of photocatalysis has been discussed. © EM International.

Chaturvedi N.,Msjcollege | Sharma S.,Msjcollege | Sharma M.K.,Msjcollege | Chaturvedi R.K.,Msjcollege
Journal of Industrial Pollution Control | Year: 2010

In recent years, array of industrial activities have been disturbing the water quality by release of various contaminants like dyestuff, heavy metal ions and many other organic substances. Discharges containing dyes, in particular, are to be controlled due to their highly toxic nature. These dyes are commercially important chemicals and frequently used in dying, printing, textile, photoghaphy, food and cosmetic industries. Despite of their importance, dyes are toxic and carcinogenic in nature. Environmental contamination by these toxic chemicals is causing serious global problems. The photocatalytic degradation of safranine O dye was carried out using MnO2 as semiconductor. Solution was prepared in distilled water and visible light was used as the source of energy. The effect of various parameters like amount of semiconductor, pH, light intensity, dye concentration etc. on the photodegradation is investigated. A tentative mechanism has been proposed. © EM International.

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