Application of Aqai Stalks As Biosorbents for the Removal of the Dyes Reactive Black 5 and Reactive Orange 16 from Aqueous Solution

被引：49

作者：

Cardoso, Natali F. ^{[1
]}

Lima, Eder C. ^{[1
]}

Calvete, Tatiana ^{[1
]}

Pinto, Isis S. ^{[1
]}

Amavisca, Camila V. ^{[1
]}

Fernandes, Thais H. M. ^{[1
]}

Pinto, Rodrigo B. ^{[1
]}

Alencar, Wagner S. ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Chem, UFRGS, BR-91501970 Porto Alegre, RS, Brazil

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2011年 / 56卷 / 05期

关键词：

LOW-COST ADSORBENTS; PINE-FRUIT SHELL; ANIONIC DYES; STATISTICAL DESIGN; METHYLENE-BLUE; PECAN NUTSHELL; TEXTILE DYE; FLY-ASH; ADSORPTION; EQUILIBRIUM;

D O I：

10.1021/je100866c

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The aqai palm stalk (Euterpe oleracea) is a food residue used in its natural form (AS) and also protonated (AAS) as biosorbents for the removal of the textile dyes C.I. Reactive Black 5 and C.I. Reactive Orange 16 from aqueous solutions. This biosorbent was characterized by infrared spectroscopy, scanning electron microscopy, and nitrogen adsorption/desorption curves. The effects of pH, biosorbent dosage, and shaking time on the biosorption capacities were studied. In the acidic pH region (pH 2.0), the biosorption of the dyes was favorable. The contact time to obtain the equilibrium at 298 K was fixed at (10 and 4) h for the AS and AAS biosorbents, respectively, using both dyes. The Avrami fractionary-order kinetic model provided the best fit to the experimental data compared with the pseudofirst-order and pseudosecond-order kinetic adsorption models. The equilibrium data were fitted to the Langmuir, Freundlich, and Sips isotherm models. For both dyes the equilibrium data were best fitted to the Sips isotherm model.

引用

页码：1857 / 1868

页数：12

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