UNASSIGNED: In this study, the potential for the sorption of @entity10781 and @entity3280 from aqueous solutions using @entity20298 -treated activated @entity505 (TAC) obtained from radish press cake (Raphanus sativus L.), a solid residue from biodiesel production, was investigated. Activated @entity505 (AC) was obtained by physical activation with @entity3158 (g). Chemical modification with @entity20298 was employed to increase the sorption capability of the AC. The sorption of @entity10781 and @entity3280 was studied in monometallic systems in equilibrium with different metal-ion concentrations (10-400  mg  L(-1)). The experimental sorption equilibrium data were fit to the Langmuir and Freundlich isotherm models. The maximum sorption capacity (qmax) obtained for AC from the Langmuir isotherm was 45.5  mg  g(-1) for @entity3280 and 250  mg  g(-1) for @entity10781 . Moreover, TAC presented qmax of 166.7  mg  g(-1) (1.48  mmol  g(-1)) for @entity3280 and 500.0  mg  g(-1) (2.41  mmol  g(-1)) for @entity10781 showing the effect of chemical modification. Sorption-desorption studies showed that the interaction between metals and TAC is reversible and this sorbent can be reused for several consecutive cycles. Furthermore, the sorption of @entity3280 and @entity10781 by TAC was not affected by the presence of competing ions. The experimental data obtained in this study indicated that this solid residue is viable for the production of sorbents that remove metals, such as @entity3409 and lead, from wastewaters and thereby contribute to the sustainable development of the production of biodiesel.

Production of activated XXXX from biodiesel solid residues: An alternative for hazardous metal sorption from aqueous solution.

@entity20298 :: ('CHEBI:25942', 'Chemical') :: ['HNO3'] @entity3280 :: ('CHEBI:48775', 'Chemical') :: ['Cd(2+)'] @entity3158 :: ('D002245', 'Chemical') :: ['CO2'] @entity3409 :: ('MESH:D002104', 'Chemical') :: ['cadmium'] @entity505 :: ('MESH:D002244', 'Chemical') :: ['carbon'] @entity10781 :: ('CHEBI:49807', 'Chemical') :: ['Pb(2+)']
@entity505 :: (MESH:D002244,Chemical) :: ['carbon']
