Adsorptive Potency of Activated Carbonized Avocado Pear Seeds (Persea Americana) and Activated Carbonized orange peels (Citrus Sinensis) in Eliminating Pb2+ ions in Contaminated Water.


  • Okponmwense Moses Department of Chemistry, Faculty of Physical Sciences, University of Benin, Benin City. Nigeria
  • Alfred David Chukwuemeka Department of Chemistry, Faculty of Physical Sciences, University of Benin, Benin City. Nigeria


Heavy metals persistence in water brings about undesirable effect on man and animal because they are not degradable like other organic pollutants. Carbonized Avocado Pear seed (CAPS) as well as carbonized orange peel (COP) was impregnated with Potassium hydroxide (KOH) in ratio 1:1 for 48 hours. The KOH impregnated CAPS and COP was separately washed and oven dried at 10  for 6 hours and thereafter heated in a muffle furnace (Carbolite AAF1100) at 2500C for 1 hour. The activated carbonized pear seed (ACAPS) and activated carbonized orange peel (ACOP) obtained was physicochemically described with SEM and FTIR. The adsorption route of Pb2+ ion on top of ACAPS as well as ACOP was examined by means of batch adsorption isotherm investigation. The Pb2+ ion adsorption pattern was assessed with Langmuir, DRK, Freundlich, Tempkin and Flory-Huggin isotherm models. The SEM photograph, disclosed that ACAPS posessed numerous openings of different dimensions whereas ACOP possessed less openings of lesser dimensions. R2 worth ranging from 0.92 to 1.00 was got, indicating that the whole isotherm models were capable of elucidating the connection in the figures got. The Pb2+ ion had a firmer attraction and adsorption capacity for ACAPS. On the overall, ACAPS was a superior adsorbent likened with ACOP for effectual elimination of Pb2+ ion owing to a blend of its numerous pores of different dimensions and it surface functional groups with a qm worth of 23.10 and 6.06mg/g in that order.


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