Arsenic adsorption and removal by a new starch stabilized ferromanganese binary oxide in water

Thermochemical study of Cr(VI) sequestration onto chemically modified Areca catechu and its recovery by desorptive precipitation method

“…Since sequestration of Cr(VI) was well described using Langmuir type monolayer adsorption model thus thermodynamic parameters were evaluated by using Langmuir equilibrium parameter (b) obtained at different temperatures. The Langmuir equilibrium parameter (b, L/mM) is related to the dimensionless equilibrium constant (K C ) by the relation as [55] : The standard Gibb's free energy change (ΔG°) is related to the equilibrium constant (K C ) by the following expression [56] : Similarly, the standard Gibb's free energy change of a reaction can be evaluated from the value of standard entropy change (ΔS°) and standard enthalpy change (ΔH°) by using equation (23) [57] . From equations (22) and (23) we have The value of ΔG° for all the tested temperatures was calculated using equation (22) whereas the slope and intercept of Van't Hoff's plot ( Fig.…”

Adsorption performance and its mechanism of aqueous As(III) on polyporous calcined oyster shell‐supported Fe–Mn binary oxide

“…The peak at 1458 cm −1 is related to the stretching vibration of O‐C‐O in the CaCO 3 , the main component of the oyster shell (Hu et al, 2014). The peak at 1126 cm −1 , attributed to the Fe‐OH stretching vibrations, moved to 808 cm −1 after arsenic adsorption, and this change was attributed to the formation of Fe–O–As, which proved that the adsorption was realized through the complex reaction of arsenic with the hydroxyl groups on the surface of the adsorbent (Xu et al, 2019).…”

Two Fascinating Polysaccharides: Chitosan and Starch. Some Prominent Characterizations for Applying as Eco-Friendly Food Packaging and Pollutant Remover in Aqueous Medium. Progress in Recent Years: A Review

“…This superficial technique is used as a complementary characterization of SEM, coupled according to sample requirements. In the study by Chen et al [ 128 ], CaCO 3 was added on the surface of starch-FBO (ferromanganese binary oxide) to form Ca-starch-FBO, aiming to improve the adsorption capacity of Cd(II) and the removal of As and Cd at specific pH conditions. The EDS results showed that the distribution of Ca, As, and Cd was similar.…”