Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt.
Nanophotonics and Applications (NPA) Lab, Polymer Research Laboratory, Beni-Suef University, Beni-Suef 62514, Egypt; Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62514, Egypt.
Int J Biol Macromol. 2021 Jan 15;167:766-776. doi: 10.1016/j.ijbiomac.2020.11.159. Epub 2020 Nov 26.
A novel grafting polymer was synthesized via grafting of diphenylamine (DPA) onto sodium alginate (NaAlg) as a new adsorbent for Cobalt (Co) from aqueous solutions. Optimization of sodium alginate grafted by diphenylamine (NaAlg-g-DPA) was addressed in the current study by several parameters including; initiator and monomer concentrations, contact time of polymerization, as well as polymerization temperature. In addition, the structural and chemical characteristics of NaAlg-g-DPA were explored using different modalities later. The results showed that sodium alginate grafted by diphenylamine (NaAlg-g-DPA) is suitable for adsorbent to removal Co ion. The parameters for the adsorption of Co(II) ions by NaAlg-g-DPA were also determined. It was shown that the samples of NaAlg-g-DPA had given good correlation with Temkins isotherm model and their kinetics followed pseudo-second-order model. It was also observed that the adsorption capacity seemed to be dependent on pH value in solution which showed better results at basic pH. The findings from this research show that NaAlg-g-DPA has capability to remove Co (II) from aqueous solutions.
通过将二苯胺（DPA）接枝到海藻酸钠（NaAlg）上，合成了一种新型接枝聚合物，作为一种从水溶液中去除钴（Co）的新型吸附剂。本研究通过几个参数（包括引发剂和单体浓度、聚合接触时间以及聚合温度）对由二苯胺接枝的海藻酸钠（NaAlg-g-DPA）进行了优化。此外，还使用不同的方法对 NaAlg-g-DPA 的结构和化学特性进行了探索。结果表明，二苯胺接枝的海藻酸钠（NaAlg-g-DPA）适合作为吸附剂去除 Co 离子。还确定了 NaAlg-g-DPA 吸附 Co(II)离子的参数。结果表明，NaAlg-g-DPA 样品与 Temkin 等温模型具有良好的相关性，其动力学遵循拟二级模型。还观察到吸附容量似乎取决于溶液的 pH 值，在碱性 pH 值下效果更好。这项研究的结果表明，NaAlg-g-DPA 具有从水溶液中去除 Co(II)的能力。
