Browsing by Author "Renukadevi, N"

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    Hexavalent Chromium Removal Using A Low-Cost Activated Carbon Adsorbent From Areca Catechu
    (2010) Lalitha, P; Renukadevi, N
    Removal of heavy metals from industrial wastewater is of primary importance because they are not only causing contamination of water bodies and are also toxic to many life forms. In recent years various heavy metals are removed from solution using natural low cost adsorbents which are economically viable. The present study is aimed at removing hexavalent chromium from aqueous solution using activated carbon from Areca catechu. The effect of variation of initial concentration of Cr (VI) solution, variation of pH and dosage of adsorbent on the adsorption potential of Cr(VI) have been studied. The results of the study have been interpreted in terms of Langmuir adsorption isotherm and Freundlich adsorption isotherm. The adsorption of Cr (VI) onto activated carbon from Areca catechu was found to be concentration dependent. The maximum removal of Cr (VI) was observed at pH 2. The adsorption Cr(VI) using activated carbon prepared from the Areca catechu shell followed Langmuir and Freundlich adsorption isotherms.
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    Kyenitic Studies of Acid Blue 110 Dye Removal Using Activated Carbon Prepared from Ripened Bauheniaracemosa Seed Pod
    (2016) Umadevi, S; Renukadevi, N
    Inthe present work adsorption studies of Acid bluellO dye onloBauheniaRacemosa seed pod carbon has been studied in a batch system. The effect of concentration of the dye solution, adsorbent dosage, contact time, pH and temperature on the adsorption process was examined and the optimum experimental conditions were identified. The maximum removal of dye was obtained at pH 2. The percentage removal of the dye decreased with an increase in initial concentration. Though the R" values of pseudo first and second order rate equations are very nearer to each other the qe values are in close agreement with second order reaction.