Measurement of cation binding to immobilized vanillin by isothermal calorimetry

Improved performance of surface functionalized TiO2/activated carbon for adsorption–photocatalytic reduction of Cr(VI) in aqueous solution

“…As confirmed on the spectrum recorded on TiO 2 /AC-DETA, stretching vibration of CQO and CO-N in secondary amide groups are observed at 1625 and 1382 cm À 1 [25], with the N-H bending vibration at 1512 cm À 1 [26], C-H stretching vibrations at 1306 cm À 1 [16], and C-N stretching vibrations at 1141 cm À 1 [27]. It is notable that, the CQO ( $ 1650 cm À 1 ) and C-N ($1000 cm À 1 ) stretching in tertiary amide groups [28,29] were not observed in the spectrum, indicating that the DETA were attached on AC by the amidation preferentially between AC-COCl and NH 2 groups in DETA.…”

Preconcentration of Cu(II), Fe(III) and Pb(II) with 2-((2-aminoethylamino)methyl)phenol-functionalized activated carbon followed by ICP-OES determination

“…The mixture was refluxed with stirring for 12 h. After filtered and washed with anhydrous ethanol to remove the remnant salicylaldehyde, the product was treated with NaBH 4 in anhydrous ethanol medium at room temperature during 24 h [22]. The final product (AC-AMP) was washed with double-distilled water and acetone and then dried under vacuum at 80 • C for 6 h. The synthesis route of AC-AMP was described in Fig.…”

Caracterização de escamas do peixe piau (Leporinus elongatus) e sua aplicação na remoção de Cu(II) de meio aquoso

“…[12][13][14][15][16][17] Nosso grupo de pesquisa vem trabalhando nos últimos anos no estudo de materiais não agressivos ao meio ambiente e que possam ser usados como adsorventes no tratamento de efluentes aquosos contaminados com metais pesados e/ou corantes têxteis. [18][19][20] Nesta mesma linha, o objetivo deste trabalho foi caracterizar escamas de peixe piau e utilizá-las na remoção de Cu(II) em meio aquoso pelo método de batelada. Os dados de adsorção foram utilizados em modelagem físico-química para calcular parâmetros de adsorção de Cu(II) no equilíbrio.…”