Add time:08/06/2019         Source:sciencedirect.com

The presence of dyes in the water sources is nowadays a well-established issue and has become a matter of both scientific and public concern. Processes such as advanced oxidation process (AOP) and adsorption has proved useful in the treatment of such emerging contaminants. In this study, commercially available nanomaterial Tio2 (size 25 nm) and rice husk ash (RHA) was used to check the removal efficiency for the trace water contaminant namely, reactive yellow dye (RYD), which is a commonly used textile dye. In this study, TiO2, a photoactive compound, was used as a catalyst in AOP and as an adsorbent in adsorption process. Comparison was made for removal efficiency between TiO2 as a catalyst and as an adsorbent. Experiments were conducted by varying the parameters such as dye concentration, pH, TiO2 concentration and reaction time to study the removal of dye. Batch Adsorption Test was conducted by employing TiO2 as adsorbent. Comparative studies were done by employing rice husk ash (RHA) also as adsorbent. It was found that for an initial concentration of 10mg/l of RYD, 87.5% removal was achieved at a pH of 3, TiO2 10mg/l for a time period of 60 minutes using AOP. For 50mg/l RYD concentration, adsorption using RHA and TiO2 was performed.

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