Biosorption of Malachite Green from Aqueous Solutions onto Polylactide/Spent Brewery Grains Films: Kinetic and Equilibrium Studies

被引：42

作者：

Chanzu, Harry Amuguni ^{[1
]}

Onyari, John Mmari ^{[2
]}

Shiundu, Paul Mwanza ^{[2
]}

机构：

[1] Western Michigan Univ, Dept Chem, Kalamazoo, MI 49008 USA

[2] Univ Nairobi, Dept Chem, Nairobi, Kenya

来源：

JOURNAL OF POLYMERS AND THE ENVIRONMENT | 2012年 / 20卷 / 03期

关键词：

Polylactide; Spend brewery grains; Films; Malachite green; Biosorption; DYE METHYLENE-BLUE; ACTIVATED CARBON; BASIC DYE; PHENOLIC-COMPOUNDS; INDUSTRY WASTE; LACTIC-ACID; ADSORPTION; REMOVAL; ISOTHERM; SORPTION;

D O I：

10.1007/s10924-012-0479-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Batch experiments were conducted to study the biosorption of Malachite Green (MG) onto polylactide (PLA)/spent brewery grains (SBGs) films. Films were prepared by solvent-casting method using dichloromethane. Effects of contact time, pH, salt concentration, and optimal experimental condition was evaluated. At pH 6.89 and low salt concentration, Malachite Green was removed effectively. The isotherm data fitted the Freundlich model with 0.969 R-2 value and 0.738 slope implying chemisorptions process. The biosorption process followed pseudo-second order kinetics with calculated adsorption capacity at equilibrium (qe) of 0.572 mg/g at 23 A degrees C. The investigation showed that PLA/SBGs films are effective in dye removal from textile, paper and leather industries effluents.

引用

页码：665 / 672

页数：8

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