Removal of an anionic dye (Acid Blue 92) by coagulation-flocculation using chitosan.
Removal of an anionic dye (Acid Blue 92) by coagulation-flocculation using chitosan.
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DOI：
10.1016/j.jenvman.2009.04.002
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发表时间：
2009-07
影响因子：
8.7
通讯作者：
A. Szyguła;E. Guibal;María Ariño Palacín;M. Ruiz;A. Sastre
中科院分区：
文献类型：
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作者：
A. Szyguła;E. Guibal;María Ariño Palacín;M. Ruiz;A. Sastre
壳聚糖（一种生物聚合物）是一种氨基多糖，可用于通过凝聚-絮凝（作为吸附等更传统工艺的替代品）处理有色溶液。以酸性蓝92（一种磺酸染料）为模型染料，研究了壳聚糖对印染废水的处理效果。初步实验表明，壳聚糖在自来水中比在软化水中更有效地脱色，并且可以将低得多的壳聚糖浓度用于自来水。在最佳浓度下，染料去除率可达99%，就酸性溶液和生物聚合物的胺基与染料中的磺酸基之间的化学计量比而言。回收絮凝物，并使用碱性溶液（0.001- 1 M NaOH溶液）有效地去除染料，并将重新溶解在乙酸溶液中的生物聚合物重新用于进一步的处理循环。
Chitosan (a biopolymer) is an aminopolysaccharide that can be used for the treatment of colored solutions by coagulation–flocculation (as an alternative to more conventional processes such as sorption). Acid Blue 92 (a sulfonic dye) was selected as a model dye for verifying chitosan's ability to treat textile wastewater. A preliminary experiment demonstrated that chitosan was more efficient at color removal in tap water than in demineralized water, and that a substantially lower concentration of chitosan could be used with tap water. Dye removal reached up to 99% under optimum concentration; i.e., in terms of the acidic solutions and the stoichiometric ratio between the amine groups of the biopolymer and the sulfonic groups in the dye. The flocs were recovered and the dye was efficiently removed using alkaline solutions (0.001–1M NaOH solutions) and the biopolymer, re-dissolved in acetic acid solution, was reused in a further treatment cycle.