Department of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Agrifood Campus of International Excellence (ceiA3), Crta. Sacramento s/n, 04120 Almería, Spain.
Int J Biol Macromol. 2020 Jun 15;153:883-891. doi: 10.1016/j.ijbiomac.2020.03.081. Epub 2020 Mar 11.
In this study, new hybrid biopolymers based on alginate and low cost materials belong lignocellulose group such as lignin and olive pomace were used to removal organic pollutants. The organic carbon content, granule size, average mass, zero charge point, water uptake and swelling of the resulting alginate-based modified adsorbents were measured. The homogeneity, complexity and encapsulation viability of the novel biopolymers were studied by FT-IR, TGA and SEM. As model of emerging contaminants belong to glucocorticoids group prednisolone drug was selected. 3,4-dichloroaniline (3,4-DCA) was chosen as aniline derivate pollutant. The efficiency of the bioadsorbents to removal 3,4-dichloroaniline and prednisolone was performed by kinetic and equilibrium batch adsorption studies. The experimental data was found well correlated to the pseudo-second order kinetic model. The adsorption of 3,4-DCA and prednisolone was mainly affected by the organic carbon content of the bioadsorbent. A higher adsorption capacity was observed for lignin-alginate based bioadsorbents. The removal efficiency was higher than 90% for 3,4-DCA in all prepared bioadsorbents, reached up to 49% for prednisolone using the bioadsorbent with the higher lignin content. These results suggest the promising potential for the prepared eco-friendly bioadsorbents to removal organic pollutants from water, mainly for aniline derivate such as 3,4-DCA.
在这项研究中，使用了基于海藻酸盐的新型杂化生物聚合物以及低成本的木质素和橄榄渣等属于木质纤维素组的材料，用于去除有机污染物。测量了所得基于海藻酸盐的改性吸附剂的有机碳含量、颗粒大小、平均质量、零电荷点、吸水率和溶胀率。通过 FT-IR、TGA 和 SEM 研究了新型生物聚合物的均一性、复杂性和包封可行性。选择了属于皮质甾类药物的新兴污染物模型药物泼尼松龙。选择 3,4-二氯苯胺（3,4-DCA）作为苯胺衍生物污染物。通过动力学和平衡批量吸附研究来评估生物吸附剂去除 3,4-DCA 和泼尼松龙的效率。实验数据与准二级动力学模型很好地相关。3,4-DCA 和泼尼松龙的吸附主要受生物吸附剂的有机碳含量影响。基于木质素-海藻酸盐的生物吸附剂表现出较高的吸附能力。在所有制备的生物吸附剂中，对 3,4-DCA 的去除效率均高于 90%，使用木质素含量较高的生物吸附剂时，对泼尼松龙的去除效率达到 49%。这些结果表明，制备的环保生物吸附剂具有去除水中有机污染物的巨大潜力，特别是对于 3,4-DCA 等苯胺衍生物。
