Studies on the adsorption of Pb(II) from aqueous solutions using sugarcane bagasse-based modified activated carbon with nitric acid: Kinetic, isotherm and desorption

Cd2+ removal efficiency of activated carbon from Prosopis juliflora: Optimization of preparation parameters by the Box-Behnken Design of Response Surface Methodology

“…6 a) display a wide band within frequency range 3600 to 3000 cm −1 which suggests presence of –NH stretching and –OH bonding of hydroxyl, carboxyl group, and phenol or alcohol groups [ 45 ]. Peaks of preliminary functional groups of the unloaded adsorbent show a relatively broad peak at 3472 and 3415 cm −1 (0-H stretching) [ 51 ], sharp peaks at 2921 cm −1 and a relatively small peak at 2851 cm −1 (C–H stretching alkane) [ 52 ] and a presence of a sharp peak at 1618 cm −1 (C C stretching). The study's observed peaks are consistent with those from results found by both [ 29 , 34 ].…”

Enhanced removal of Ce(iii) and Sr(ii) ions from aqueous solution using ultrasonication-assisted sawdust-TiO2 sorbent

“…The peak observed at 1260 cm −1 corresponds to the C-O stretching vibration of carboxylic acid and alcohol. 85 The peak at 1032 cm −1 is assigned to the (C-O-C) stretching vibration in cellulose and hemicellulose. 86 The peaks in the range of 400-700 cm −1 are attributed to the Ti-O and Ti-O-Ti stretching vibrations.…”

Taguchi Parametric Optimization and Cost Analysis of Hexavalent Chromium Sequestration From Aqueous Solution by NaOH-Modified Garcinia kola Hull Particles

“…The reusability efficiency of cMGK-HP for Cr(VI) sequestration from aqueous solution was investigated via For the first adsorption experiment, 0.5 g of Cr(VI) ions loaded cMGK-HP was added to 50 mL of 0.1 M HNO 3 solution in a flask for 2 hours at 80°C in order to increase the oxygencontaining functional groups of the regenerated adsorbent. 22 The regenerated cMGK-HP was re-used consecutively for 5 times and the method prescribed by Giri et al 23 was used to calculate the desorption efficiency.…”