Abstract
AbstractIn this study,Trapa bispinosa'speel (TBP) biomass is exploited as an effective, low cost and new adsorbent to remove Pb(II) from aqueous solution. TBP is pretreated and modified with HNO3, HClO4and H2O2to enhance the Pb(II) removal and it is perceived that chemical modifications enhance the adsorption capacity of TBP. The adsorption behavior of Pb(II) is studied under different conditions, including pH (3-6), TBP dose (0.050.8 g), stirring speed (100-200 rpm), initial Pb(II) ion concentration (25-400 mg L-1) and contact time (0-1440 min). Kinetic study reveals sorption is fast in first 15 to 30 min achieving equilibrium in 60 min with qmax(mg g-1) are 77.09, 105.40 and 123.82 for NT-TBP, NA-TBP and HCA-TBP respectively. The Langmuir model successfully defines the sorption data having higher R2and good agreement between theoretical and experimental uptake capacity of Pb(II). The kinetic study exhibits that the pseudo-second order rate equation is better portrayed sorption process. TBP modified with HClO4shows the highest metal uptake in comparison to HNO3, H2O2modified TBP and native TBP.
Highlights
In this study, Trapa bispinosa’s peel (TBP) biomass is exploited as an effective, low cost and new adsorbent to remove Pb(II) from aqueous solution
For adsorption/desorption experiments, 0.1 g of HClO4 treated Trapa bispinosa’s Peel (HCA-TBP) or named as HNO3 treated Trapa bispinosa’s Peel (NA-TBP) was treated with 100 mL solution containing 50 mg L-1 of Pb(II) and the solution was
The possible reason of much enhancement in the uptake capacity of TBP for Pb(II) when treated with HClO4, could be that pretreatment might be responsible to rupture the biomass cells, which results in releasing the polymers such as polysaccharides that have a great affinity towards certain metal cations and enhance surface area and porosity for adsorption [36,37]
Summary
Abstract: In this study, Trapa bispinosa’s peel (TBP) biomass is exploited as an effective, low cost and new adsorbent to remove Pb(II) from aqueous solution. TBP is pretreated and modified with HNO3, HClO4 and H2O2 to enhance the Pb(II) removal and it is perceived that chemical modifications enhance the adsorption capacity of TBP. The adsorption behavior of Pb(II) is studied under different conditions, including pH (3-6), TBP dose (0.050.8 g), stirring speed (100-200 rpm), initial Pb(II) ion concentration (25-400 mg L-1) and contact time (0-1440 min). Kinetic study reveals sorption is fast in first 15 to 30 min achieving equilibrium in 60 min with qmax (mg g-1) are 77.09, 105.40 and 123.82 for NT-TBP, NA-TBP and HCA-TBP respectively. TBP modified with HClO4 shows the highest metal uptake in comparison to HNO3, H2O2 modified TBP and native TBP
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