Enhanced removal of hexavalent chromium from aqueous media using a highly stable and magnetically separable rosin-biochar-coated TiO₂@C nanocomposite

Abstract

A biochar-coated RBC-TiO2@C nanocomposite was synthesized using a wet chemical coating followed by a one-step heating route (pyrolysis) for the efficient removal of Cr(vi).

Erythrocyte Membrane-Wrapped Magnetic Nanotherapeutic Agents for Reduction and Removal of Blood Cr(VI)

“…The spectrum of Fe/MS/HPA/ASC displays an O–H stretching vibration peak of ASC at around 3400–3230 cm –1 , C–H stretching vibration peak at 2926 cm –1 , and CO stretching vibration peak at 1640 cm –1 , indicating the successful loading of HPA and ASC. The spectra of Fe/MS/HPA/ASC@EM contains the main peaks of EM and Fe/MS/HPA/ASC, implying successful encapsulation of EM (Figure B). , The content of HPA and ASC in Fe/MS/HPA/ASC determined by fluorescence spectroscopy and potassium ferricyanide–Fe­(III) spectrophotometry was about 16.8 and 5.0%, respectively (Figure S2), which is in accordance with that determined by thermogravimetric analysis (TGA) (Figure C). The zeta potential (Figure D) of Fe 3 O 4 was about −21.3 mV, which changed to −25.2 mV for Fe/MS due to the presence of negative charged Si–OH on MS .…”

The preparation of a novel iron/manganese binary oxide for the efficient removal of hexavalent chromium [Cr(vi)] from aqueous solutions

“…7f) models were used to interpret the adsorption behavior. 47,48 3.3.1 Adsorption isotherms. Equilibrium adsorption isotherm tests were performed by transferring 0.15 g absorbent and 50 mL Cr(VI) solution (5-100 mg L À1 ) to a capped tube prior to shaking in a temperature-controlled orbital shaker (200 rpm).…”

Advances in Rosin-Based Chemicals: The Latest Recipes, Applications and Future Trends

“…In recent studies unmodified rosin was used for making films, coatings and adhesives [26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42], biomedical applications [43,44,45,46,47,48,49,50,51,52,53,54,55], or in mining, metallurgy and construction [56,57,58] and for filler purposes [59,60,61,62,63,64]. However, chemical modification of rosin gives many-fold greater possibilities of using this raw material, which are described in the next, main section of this article.…”