Application of the central composite design to study the flocculation of an anionic azo dye using quaternized cellulose nanofibrils

作者：Quinlan Patrick James; Tanvir Aafia; Tam Kam Chiu^*

来源：Carbohydrate Polymers, 2015, 133: 80-89.

DOI：10.1016/j.carbpol.2015.06.095

• Cellulose nanofibrils
• Quaternized
• Flocculation
• Anionic dye
• Wastewater

Cellulose nanofibrils (CNF) grafted with glycidyltrimethylammonium chloride (GTMAC), containing quaternary ammonium contents of 0.44 (QCNF-1), 1.47 (QCNF-2), and 2.28 (QCNF-3) meq g(-1), were evaluated as flocculants for the removal of Reactive Orange 16, an anionic azo dye, from aqueous solution. A rotatable and orthogonal central composite design was used to examine the performance of QCNFs under a range of experimental conditions. Removal efficiencies at the centre point of the design space were found to be 236.9 +/- 7.8, 254.2 +/- 3.8, and 264.6 +/- 2.8 mg g(-1) for QCNF-1, QCNF-2 and QCNF-3, respectively. The highest removal efficiency, 295.1 mg g(-1), was observed when using QCNF-3 at a low monovalent salt concentration. The QCNF reported herein provides a sustainable and biodegradable alternative to traditional synthetic flocculants for the decolorization of dye-containing effluents.

• 出版日期2015-11-20