Removal of chromate from water samples by cationic cellulose
Makaleler > Tam Makale · 2023
Yazarlar: Ebru Sarıoğlu, Cesur MEHENKTAŞ, Özgür ARAR
Biomass Conversion and Biorefinery, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2023, cilt 14, ss 21419-21429
DOI: 10.1007/s13399-023-04292-9
Özet
<p> In this study, cellulose with quaternary ammonium functions was prepared and utilized to remove Cr(VI) from aqueous solu tions and water samples from plating baths. Batch sorption tests conducted with aqueous solutions revealed that the removal of Cr(VI) was rapid, completing in just 3 min. Cr(VI) sorption was pH dependent, exhibiting a low removal rate at acidic pH levels and increasing with the solution pH. Within the pH range of 6–10, up to 99% of Cr(VI) could be removed from the solution. The optimum conditions identified were applied to an actual plating bath water sample, resulting in 99% of Cr(VI) removal from the solution. The maximum sorption capacity of the prepared sorbents was 32.68 mg/g. The removal rate of Cr(VI) changed by only 1% at low coexistence of ions (namely Cl−, SO4 2−, PO4 3–, and NO3 −), but it decreased by 14% to 45% when concentrations increased from 5 to 100 mg/L. Thermodynamic studies revealed that Cr(VI) sorption was both spontaneous and exothermic. The exhausted sorbent can regenerate completely with 1 M HCl or H2SO4 solution.</p>