Adsorption of lead from aqueous solution onto coir-pith activated carbon

作者：Kumar Pradeep; Rao Ramamohan; Chand Shri; Kumar Sushil; Wasewar K L^*; Yoo Chang Kyoo

来源：Desalination and Water Treatment, 2013, 51(13-15): 2529-2535.

DOI：10.1080/19443994.2012.749009

• Adsorption
• Lead
• Pith activated carbon
• Kinetics
• Isotherms
• Thermodynamics

Adsorption of lead (Pb(II)) from aqueous solution using H2SO4-activated carbon developed from coir pith (CPAC) was studied. Batch experiments were performed to explain the effect of initial pH (pH(0)), contact time, adsorbent dose, and temperature on adsorption. A pH(0) of 5.0, a dose of 1 g L-1 for adsorption at a concentration of Pb of 20 mg L-1 were the optimal conditions. The adsorption of lead onto CPAC was found to be a gradual process and the quasi-equilibrium condition reached in 4 h. The adsorption followed pseudo-second-order kinetics and the adsorption equilibrium followed the Temkin isotherm. Thermodynamic parameters such as Delta G(0), Delta H-0, and Delta S-0 were evaluated by applying the Arrhenius and Van%26apos;t Hoff equations, and it was found that adsorption of Pb(II) on CPAC was spontaneous and endothermic.

• 出版日期2013-3