Search results

Search:
in the keywords: dye sorption

Sort By:

Limit search:

Treatment of wastewaters containing acid, reactive and direct dyes using aminosilane functionalized silica

100%

Wawrzkiewicz M., Hubicki Z., Nowacka M., Klapiszewski Ł.

Open Chemistry

2015

vol. 13

issue 1

Aminosilane modified silica was prepared and investigated for the adsorption of textile dyes such as C.I. Acid Orange 7 (AO7), C.I. Reactive Black 5 (RB5) and C.I. Direct Blue 71 (DB71) from aqueous media and wastewaters. The values of the sorption capacities obtained from the Langmuir isotherm model were: 5.3 mg g-1, 58.7 mg g-1 and 72.2 mg g-1 for AO7, DB71 and RB5, respectively. The affinity series of the dyes for the modified silica can be presented as follows: C.I. Reactive Black 5 > C.I. Direct Blue 71> C.I. Acid Orange 7. The influence of anionic surfactant (SDS) and sodium chloride on dye sorption was investigated in a system containing 100 mg L-1 dye and 0.1-1 g L-1 SDS or 1-25 g L-1 NaCl. The sorption capacities decrease with increasing concentration of SDS in the solution. Retention of AO7 and RB5 was reduced in the presence of NaCl. A satisfactory agreement of the experimental data with the pseudo second-order kinetic model was found. Effectiveness of the aminosilane modified silica in raw textile wastewater purification was confirmed.

Refine search results

1 Open Chemistry

1 2015

1 Hubicki Z.

1 Klapiszewski Ł.

1 Nowacka M.

1 Wawrzkiewicz M.

Search results

Treatment of wastewaters containing acid, reactive and direct dyes using aminosilane functionalized silica