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Removal of Mercury (II) by Adsorption Onto Silk Cotton Hull Activated Carbon


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

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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  • Removal of Mercury (II) by Adsorption Onto Silk Cotton Hull Activated Carbon

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Authors

R. Shanmugavalli
Deptt. of Environmental Science, PSG College of Arts and Science, Coimbatore-641 014, T.N., India
S. Madhavakrishnan
Deptt. of Environmental Science, PSG College of Arts and Science, Coimbatore-641 014, T.N., India
R. Mohanraj
Deptt. of Environmental Management, Bharathidasan University, Tiruchirappalli-620 024, T.N., India
K. Kadirvelu
Centre for Fire, Explosive and Environment Safety (CFEES), Defence Research and Development Organization, Birg. Majumdar Road, Timarpur, Delhi-110 054, India
S. Krishna Bharathi
Deptt. of Environmental Science, PSG College of Arts and Science, Coimbatore-641 014, T.N., India
S. Pattabhi
Deptt. of Environmental Science, PSG College of Arts and Science, Coimbatore-641 014, T.N., India

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.