Nature Environment and Pollution Technology

S. Madhavakrishnan ¹, K. Manickavasagam ¹, Y. Sameena ², K. Selvam ³, K. Kairvelu ⁴

Affiliations
1 Department of Environmental Science, PSG College of Arts and Science, Coimbatore-641 014, T. N., IN
2 Department of Chemistry, Karpagam Arts and Science College, Coimbatore, T.N., IN
3 Department of Biotechnology, Dr. N.G.P. College, Coimbatore, T.N., IN
4 Centre for Fire, Explosive and Environment Safety (CFEES), DRDO, Delhi, IN

Abstract

Activated carbon prepared from Ricinus communis pericarp (RCP) was used to remove Fe(II) ions from aqueous solutions by adsorption technique under varying conditions of agitation time, metal ion concentration, adsorbent dosage, pH and desorption. The effective pH was found to be 5 ± 0.2. Adsorption followed both Langmuir and Freundlich isotherm models.

Keywords

Adsoption of Iron, Ricinus communis, Activated Carbon, Freundlich Isotherm, Langmuir Isotherm.

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R. Shanmugavalli ¹, S. Madhavakrishnan ¹, R. Mohanraj ², K. Kadirvelu ³, S. Krishna Bharathi ¹, S. Pattabhi ¹

Affiliations
1 Deptt. of Environmental Science, PSG College of Arts and Science, Coimbatore-641 014, T.N., IN
2 Deptt. of Environmental Management, Bharathidasan University, Tiruchirappalli-620 024, T.N., IN
3 Centre for Fire, Explosive and Environment Safety (CFEES), Defence Research and Development Organization, Birg. Majumdar Road, Timarpur, Delhi-110 054, IN

Abstract

Activated carbon prepared from silk cotton hull was investigated for removal of mercury (II) from aqueous solution by adsorption technique. Batch mode adsorption studies were carried out under varying conditions of agitation time, metal ion concentration, adsorbent dose and pH. Adsorption equilibrium was obtained in 150 min for 10, 20, 30 mg/L of Hg (II) concentration. Adsorption followed Langmuir isotherm. The percent removal increased with increase in pH from 2 to 5 and remains static from pH 5 to 10. Desorption studies were performed with dilute hydrochloric acid solution. Silk cotton hull carbon was found to be effective in removal of Hg (II) from aqueous solution and economically viable.

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