Chemical pretreatments of Trapa bispinosa's peel (TBP) biosorbent to enhance adsorption capacity for Pb(ll)

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. The Langmuir model successfully defines the sorption data having higher R2 and 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 HClO4 shows the highest metal uptake in comparison to HNO3, H2O2 modified TBP and native TBP.

Separation of lead-212 from natural thorium solution utilizing novel sulfonamide dibenzo-18-crown-6

“…DSADB18C6: 1 H NMR (400 MHz, CDCl 3 ) δ 7.38 (d, J = 2.1 Hz, 2H), 7.23 (s, 2H), 6.87 (d, J = 1.4 Hz, 2H), 4.22-4.14 (m, 8H), 4.05-3.97 (m, 8H), 3.19 (q, J = 7.1 Hz, 8H), 1.10 (t, J = 7.1 Hz, 12H). 13…”

“…Various extractants have been studied for the Pb(II) separation, including organic phosphonates, [12][13][14] carboxylic acid, 15,16 phosphinic acid, 17 and calix compounds. 18,19 Despite exhibiting a high separation efficiency for Pb(II), these extractants still face numerous challenges in practical applications, including toxicity after decomposition, high concentration of stripping, inadequate selectivity, the propensity to form emulsions or low capacity for extraction.…”

Study of Isotherm and Kinetics for Remediation of Congo Red Using Nanocomposite Bead

“…The extent of adsorption remained almost same beyond the shaking speed of 150 spm for dye solution of different concentrations. 25…”

Comparative study of Hg(ii) biosorption performance of xanthated and charred sugarcane bagasse from aqueous solutions

“…37,42,43 For example, Trapa bispinosa's peel biomass is used as an effective, low-cost, and new adsorbent to remove lead(II) from aqueous solutions. 44 Rice bran biomass were used to remove nickel. 45,46 Biomass from NaOH-pretreated Mangifera indica leaves was found to have the highest absorption capability.…”