Adsorptive removal of Congo red and Sunset Yellow dyes from water systems by lady finger stem. | [Journal of Chemical Society of Pakistan • 2012]

Author(s):

1. Aadil Abbas: Department of Chemistry, University of the Gujrat, Gujrat, Pakistan

2. Shahzad Murtaza: Department of Chemistry, University of the Gujrat, Gujrat, Pakistan

3. Rabia Ayub: Department of Chemistry, University of the Gujrat, Gujrat, Pakistan

4. Rabia Rehman: Institute of Chemistry, University of the Punjab, Lahore-54590, Pakistan

5. Ambreen Zahid: Institute of Chemistry, University of the Punjab, Lahore-54590, Pakistan

6. Umer Shafique: Center for Undergraduate Studies, University of the Punjab, Lahore-54590, Pakistan

Abstract:

In this research work two anionic dyes, i.e. Congo Red and Sunset Yellow were removed successfully from aqueous media by Lady Finger stem in batch mode. Operational conditions optimization showed that agitation speed and particle size did not affect much in adsorption of these dyes; but contact time, pH, adsorbent dose and temperature of system effects the adsorption rate. Optimized conditions of adsorption for Congo Red dye were: 40 minute contact time, 8.0 pH, 0.5 g adsorbent dose, 40-60 microns mesh sized particles, 150 rpm agitation speed and 50ºC temperature. Whereas for Sunset Yellow optimized conditions were: 30 minute contact time, 2.0 pH, 2.5 g adsorbent dose, 20-40 microns mesh sized particles, 50 rpm agitation speed and 30ºC temperature. Suitability of equilibrium data was modulated with Langmuir, Freundlich and Temkin models and found that both physiosorption and chemisorption processes play important role in adsorption of these dyes by Lady Finger stem. The results demonstrated that Lady Finger stem can be efficiently employed on larger scale wastewater treatment.

Page(s): 1241-1247

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 34, Issue: 5, Year: 2012

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