keywords: Adsorption isotherm,batch adsorption, Langmuir,thermodynamic
The adsorption of Pb2+ using rice husk as adsorbent was studied using batch adsorption method. The physicochemical parameters gave values of 6.13, 42 %, 23, 5 %, 0.5 mg/L and 55.50 mg/L for pH, attrition, ash content, moisture content, bulk density and iodine number. Atomic absorption spectrophotometer was used to monitor the adsorption of Pb2+. The optimum values obtained were 84.45% at 20 mg/L for concentration, 99.60% at a pH of 11, 81.50 % at a contact time of 40 min and 92.44 at an adsorbent dose of 5 g, signifying that rice husk is a good adsorbent for the removal of Pb2+ from simulated waste water. The result fitted into Langmuir and Freundlichisotherm.
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