Saad Sara, Dávila Izaskun, Morales Amaia, Labidi Jalel, Moussaoui Younes
Laboratory for the Application of Materials to the Environment, Water and Energy (LR21ES15), Faculty of Sciences of Gafsa, University of Gafsa, Gafsa 2112, Tunisia.
Department of Chemical and Environmental Engineering, University of the Basque Country, UPV/EHU Plaza Europa 1, 20018 San Sebastián, Spain.
Materials (Basel). 2022 Dec 8;15(24):8760. doi: 10.3390/ma15248760.
The goal of this study is to assess 's potential for producing carboxymethylcellulose adsorption membranes with the ability to adsorb methyl green from wastewaters by the revalorization of its cellulosic fraction. The cellulose from this feedstock was extracted by an alkaline process and TAPPI standard technique T 203 cm-99 and afterwards they were carboxymethylated. The obtained carboxymethylcelluloses were deeply characterized, being observed that the carboxymethylcellulose produced from the alkaline cellulose presented the higher solubility due to its lower crystallinity degree (53.31 vs. 59.4%) and its higher substitution degree (0.85 vs. 0.74). This carboxymethylcellulose was cross-linked with citric acid in an aqueous treatment in order to form an adsorption membrane. The citric acid provided rigidity to the membrane and although it was hydrophilic it was not soluble in water. By evaluating the potential of the produced membrane for the removal of pollutant dyes from wastewater, it was observed that the adsorption membrane prepared from the carboxymethylcellulose's produced from the was able to remove 99% of the dye, methyl green, present in the wastewater. Thus, this work demonstrates the potential of the for the production of a novel and cost-effective carboxymethylcellulose adsorption membrane with high capacity to treat wastewaters.
本研究的目标是通过对其纤维素部分进行再利用，评估[原料名称]生产具有从废水中吸附甲基绿能力的羧甲基纤维素吸附膜的潜力。采用碱性工艺和TAPPI标准技术T 203 cm - 99从该原料中提取纤维素，随后对其进行羧甲基化。对所得羧甲基纤维素进行了深入表征，发现由碱性纤维素制得的羧甲基纤维素由于其较低的结晶度（53.31%对59.4%）和较高的取代度（0.85对0.74）而具有更高的溶解度。在水相处理中，将该羧甲基纤维素与柠檬酸交联以形成吸附膜。柠檬酸赋予膜刚性，尽管它是亲水性的，但不溶于水。通过评估所制备的膜对废水中污染物染料的去除潜力，发现由[原料名称]制得的羧甲基纤维素制备的吸附膜能够去除废水中99%的染料甲基绿。因此，这项工作证明了[原料名称]在生产具有高处理废水能力的新型且经济高效的羧甲基纤维素吸附膜方面的潜力。
