Adsorptive Removal of Heavy Metals from Aqueous Solution with Environmental Friendly Material—Exhausted Tea Leaves - Advances in Chemical Engineering and Science

ACES > Vol.6 No.4, October 2016

Advances in Chemical Engineering and Science

Volume 6, Issue 4 (October 2016)

ISSN Print: 2160-0392 ISSN Online: 2160-0406

Google-based Impact Factor: 1.41 Citations h5-index & Ranking

Adsorptive Removal of Heavy Metals from Aqueous Solution with Environmental Friendly Material—Exhausted Tea Leaves ()

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DOI: 10.4236/aces.2016.64046 2,414 Downloads 4,789 Views Citations

Author(s)

Bindra Shrestha^1*, Jagjit Kour¹, Kedar Nath Ghimire²

Affiliation(s)

¹Department of Chemistry, Tri-Chandra Campus, Kathmandu, Nepal.
²Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal.

ABSTRACT

In this study adsorptive removal of Pb(II) and Cu(II) from aqueous solution by using environmental friendly natural polymers present in exhausted tea leaves has been studied. The biosorbent was modified with dimethylamine to introduce N-functional groups on the surface of adsorbent. The modified adsorbent was characterized by elemental analysis, zeta potential analysis, SEM, DRFTIR, XRD and TG/DTA analysis to conform the modification. Adsorption capacity of the adsorbent was determined as the function of pH of the solution, initial concentration of the solution and contact time. The adsorption experiments were performed using batch experiments. The maximum adsorption capacities of the adsorbent were found to be 91.68 and 71.20 mg/g for Pb(II) and Cu(II), respectively. To minimize the process cost, regeneration of the biosorbent and recovery of metal ions was explored by desorption study. The results indicate that the adsorbent holds great potential for the sequestration of Pb(II) and Cu(II) from their aqueous solution. Hence the modified exhausted tea leaves (MTL) have been investigated as a new cost effective and efficient biosorbent for removal of Pb(II) and Cu(II) from their aqueous solution.

KEYWORDS

Natural Polymer, Biosorbent, Heavy Metals, Dimethylamine, Exhausted Tea Leaves

Share and Cite:

Shrestha, B. , Kour, J. and Ghimire, K. (2016) Adsorptive Removal of Heavy Metals from Aqueous Solution with Environmental Friendly Material—Exhausted Tea Leaves. Advances in Chemical Engineering and Science, 6, 525-540. doi: 10.4236/aces.2016.64046.

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