期刊
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
卷 93, 期 3, 页码 534-537出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0036024419030142
关键词
dye; alumina; hydrophobized silica; sorption
Sorption of the synthetic anionic dye Amaranth on silica chemically modified by hexadecyl groups (Diasorb-130-C16 and -Al2O3) is studied. It is found that Amaranth sorption on Diasorb-130-C16 is maximal in the acidic medium (0.5 M HCl) and totals 72%. With -Al2O3, the degree of sorption is maximal at pH1-5 and totals 92%. Possible schemes of the dye's interaction with surfaces of the sorbent are proposed. Sorption isotherms are derived under the optimum conditions of sorption, and changes in the standard Gibbs energy are calculated. The possibility of detecting the dye on surfaces of the sorbent via diffuse reflectance spectroscopy is demonstrated.
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