مجلة العلوم التطبيقية

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Utilization Of Consumed Green Tea Leaves As Low Cost Adsorbent For Removal Of Lead Ions From Polluted Water
(Sebha University, 2010) Assad Esheewe, Mohamed A Ackacha, Naje A Saeed
The presence of toxic heavy metals such as lead in water environment, is one of the most environment problems in the developing countries. Adsorption technique is one of the effective methods were used for removal of lead ions from polluted water. In the present work, consumed green tea leaves without further treatment were used for the removal of lead ions from polluted water. Batch adsorption experiments explained that the consumed green tea leaves has a high adsorption efficiency for adsorption of lead ions onto it's surface. Several parameters affecting the adsorption process were studied such as initial pH of lead ion solutions, adsorbent concentration and contact time. Adsorption kinetics such as pseudosecond order reaction was studied. Langmuir and Freundlich models were applied for describing the adsorption process. The maximum adsorption capacity of Pb(II) onto consumed green tea leaves at 313 and 320 K were 192.31 and 138.88 mg/g, respectively.