enriched with organic functional groups.
The optimal conditions for production of the adsorbent and adsorption of Pb2+ were investigated. The results of
adsorb-ability fitted the Langmuir isotherm and pseudo-second-order model well. The highest Pb2+ (at
pH = 4.0) adsorption capacity was achieved by treating with 60% (v/v) HNO3. This is a promising approach
for metal removal from wastewater, as well as recycling sewage sludge and bagasse to ease their disposal
pressure.