Fijoł Natalia, Abdelhamid Hani Nasser, Pillai Binsi, Hall Stephen A, Thomas Nebu, Mathew Aji P
Department of Materials and Environmental Chemistry, Stockholm University Frescativägen 8 106 91 Stockholm Sweden
Advanced Multifunctional Materials Laboratory, Department of Chemistry, Faculty of Science, Assiut University Assiut 71515 Egypt.
RSC Adv. 2021 Oct 1;11(51):32408-32418. doi: 10.1039/d1ra05202k. eCollection 2021 Sep 27.
High flux, monolithic water purification filters based on polylactic acid (PLA) functionalised with fish scale extracted hydroxyapatite (HAp) were prepared by solvent-assisted blending and thermally induced phase separation (TIPS), followed by twin-screw extrusion into filaments and processed three-dimensional (3D) printing. The printed filters with consistent pore geometry and channel interconnectivity as well as homogenous distribution of HAp in the PLA matrix showed adsorption capabilities towards heavy metals cadmium (Cd) and lead (Pb) with maximum adsorption capacity of 112.1 mg g and 360.5 mg g for the metal salt of Pb and Cd, respectively. The adsorption was found to be driven by a combination of ion exchange, dissolution and precipitation on HAp and surface complexation.
通过溶剂辅助共混和热致相分离（TIPS）制备了基于用鱼鳞提取的羟基磷灰石（HAp）功能化的聚乳酸（PLA）的高通量整体式水净化过滤器，随后通过双螺杆挤出成细丝并进行三维（3D）打印。打印出的过滤器具有一致的孔隙几何形状和通道连通性，以及HAp在PLA基质中的均匀分布，对重金属镉（Cd）和铅（Pb）具有吸附能力，对于Pb和Cd的金属盐，最大吸附容量分别为112.1 mg/g和360.5 mg/g。发现吸附是由HAp上的离子交换、溶解和沉淀以及表面络合共同驱动的。
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