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Cu(II) adsorption from
aqueous solutions on sugar beet pulp carbon
Sugar beet pulp was carbonized at different temperature to convert into an
effective adsorbent, namely, sugar beet pulp carbon (SBPC) to be used for
the removal of Cu(II) ions from aqueous solutions. The parameters affected
the adsorption yield such as pH, contact time, adsorbent dosage and initial
Cu(II) concentration were optimised. The optimum pH was determined as 5.5,
and it was found that the adsorption reached equilibrium state in 120min.
Equilibrium data were fitted to both Langmuir and Freundlich adsorption
models in the concentration range studied. The maximum adsorption capacities
of Cu(II) ions were 12.24, 13.44 and 14.81mg/g for SBPCs obtained at 300,
400 and 500oC, respectively. The adsorption of Cu(II) ions were analysed
using Lagergren pseudo first-order kinetic model. The results showed that
the Cu(II) adsorption process followed the first order rate expression and
the adsorption rate constants decreased with increasing carbonization
temperature. |
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