Abstract
Adsorption of lead(II) ions onto activated carbons prepared from the marine green Ulva fasciata sp. (CCUC, SSUC and SCUC) and commercially activated carbon (CAC) was investigated with the variation in the parameters of pH, contact time, lead(II) ions concentration and the adsorbent dose. The Langmuir, Freundlich and Temkin models have been applied. Results showed that the adsorption process was better described by the Langmuir model. Adsorption kinetics data obtained for the metal ions sorption were investigated using reversible first order, pseudo-first order, pseudo-second order and intraparticle diffusion model. The maximum adsorption capacities (Q0) were 22.93 mg/g for CCUC, 24.15 mg/g for SSUC, 23.47 mg/g for SSUC and 15.62 mg/g for CAC. It was found that the kinetics data fitted well into the pseudo second-order kinetics and SSUC is a superior adsorbent for the removal of Pb(II) ions from aqueous solution.
Highlights
Background Adsorption of lead(II) ions onto activated carbons prepared from the marine green Ulva fasciata sp. (CCUC, Sodium sulphate-treated U. fasciata carbon (SSUC) and SCUC) and commercially activated carbon (CAC) was investigated with the variation in the parameters of pH, contact time, lead(II) ions concentration and the adsorbent dose
It was found that the kinetics data fitted well into the pseudo second-order kinetics and SSUC is a superior adsorbent for the removal of Pb(II) ions from aqueous solution
The adsorption behaviour of Pb(II) on the surface of activated carbons prepared from U. fasciata (CCUC, SSUC and SCUC) and commercially available activated carbon (CAC) has been investigated over a pH range of 1.0–10.0 at room temperature with 100 mL of Pb(II) ion concentration 20 mg/L containing 0.2 g activated carbon and contact time 2 h
Summary
Adsorption of lead(II) ions onto activated carbons prepared from the marine green Ulva fasciata sp. (CCUC, SSUC and SCUC) and commercially activated carbon (CAC) was investigated with the variation in the parameters of pH, contact time, lead(II) ions concentration and the adsorbent dose. Adsorption of lead(II) ions onto activated carbons prepared from the marine green Ulva fasciata sp. (CCUC, SSUC and SCUC) and commercially activated carbon (CAC) was investigated with the variation in the parameters of pH, contact time, lead(II) ions concentration and the adsorbent dose. Lead exposure causes weakness in fingers, wrists and ankles. The effects of lead toxicity are very wide ranging and include impaired blood synthesis, hypertension, severe stomach-ache, brain, kidney damage and even can cause miscarriage in pregnant women [4]. The permissible level for lead in drinking water is 0.05 mg L-1 according to the US Environmental Protection Agency (EPA). A very low concentration of lead in water is very toxic [5]
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