The aim of this study was to use low cost adsorbents, which consist of corn cobs
as plant wastes adsorbents in treatment of Industrial waste water by fixed bed
column technique and study the effect of two variables (pH value and contact time).
The sample of plant waste (Corn cobs) was tested to determine its activity which
gives the best performance in heavy metals removal and other pollutants (TSS, TDS
and COD). Adsorption tests showed the corn cobs adsorbents had significant heavy
metal removal efficiency. The best removal efficiency 95.05% of Cr was occurred at
pH 5.4 and 4.18hr. Higher removal efficiency 99.90% of Ni was occurred at pH 6.5
and 2.38hr. While, lower removal efficiency 91.35% for Zn obtained at pH 6.5 and
0.15hr. Removal efficiency for TDS, TSS and COD were 56%, 65.7% and 83.3%
respectively.