In this study, the adsorption of lead (Pb 2+) onto activated carbon (AC) originating from cow
bone, chemically modified with HNO 3, was investigated. Physico-chemical carbon
characterization assays and the determination of the optimum pH conditions and contact
time, as well as studies on the kinetic and isothermal equilibrium and adsorbent reuse, were
carried out. The AC presented a greater amount of acid functional groups than basic groups
at the surface, making it efficient for cationic exchange. The pH PZC was 4.0 and the …

abstract In this study, the adsorption of lead (Pb2þ) onto activated carbon (AC) originating
from cow bone, chemically modified with HNO3, was investigated. Physico-chemical carbon
characterization assays and the determination of the optimum pH conditions and contact
time, as well as studies on the kinetic and isothermal equilibrium and adsorbent reuse, were
carried out. The AC presented a greater amount of acid functional groups than basic groups
at the surface, making it efficient for cationic exchange. The pHPZC was 4.0 and the …