Characterization and Application of Powder Activated Carbon from Water Hyacinth as Adsorbent for Removal of CR (VI) from Aqueous Solution

K R Aswin Sidhaarth¹, Teshibelay Ashagre²

¹Associate Professor, ²PG Scholar, Department of Civil Engineering,
Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology,, Chennai, India.

Abstract

Hexavalent chromium, Cr (VI), is a toxic metal present in industrial effluents. The present study focuses on adsorption of Cr (VI) from aqueous solution on activated carbon prepared from water hyacinth shoot. The shoots taken from hyacinth was washed with distilled water and then it was dried. The dried sample were crushed into powder form in a circular saw mill. The powder thus obtained was activated with 10% of H2SO4 and carbonized at 500 °C for 30minutes in an electric furnace. The characteristics such as functional groups and surface morphology of activated carbon were analyzed using FTIR spectroscopyand SEM analysis respectively. From the characterization studies WHAC was assigned to the O–H stretching mode of hydroxyl groups and from the SEM studies it was observed that surface was highly porous and acidic. The Cr (VI) concentrationwas measured using UV-Visspectrophotometry. Batch adsorption experiments were performed to examine the effects of contact time, adsorbent dose, pH of the simulated solution, Cr (VI)concentration, agitation speed and temperature. Results show the maximum adsorption capacity of Cr(VI) was found to be 23.75 mg/gat pH 2, 1hr contact time, 40 mg/L Cr (VI) initial concentration, 1.4g/L adsorbent dose and temperature 30 °C. The Langmuir and Freundlich adsorptionisotherm models were used to fit the experimental data. Therefore, the activated carbon of water hyacinth shoot (WHAC) can be an effective adsorbent for Cr (VI) from the aqueous solution.

Keywords

• Activated carbon, Adsorption, low cost adsorbent, hexavalent chromium, Adsorption isotherm, Adsorption kinetics

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Cite this Article as Follows

K R Aswin Sidhaarth, Teshibelay Ashagre. Characterization and Application of Powder Activated Carbon from Water Hyacinth as Adsorbent for Removal of CR (VI) from Aqueous Solution. International Conference on Global Environmental Changes and Sustainable Development (2019): 59. Print.