Synthesis and Characterization of Adsorbent Materials Magnetite Mercaptosilicate Ion Imprinted Polymer as Cadmium Ion Adsorbent

None Nabela Viviana, None Ngatijo, None Restina Bemis, None Diah Riski Gusti
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Abstract

Cadmium (Cd) is a toxic heavy metal with the active property of reacting with other components so that cadmium residues can quickly enter the food chain and cause cardiovascular, kidney, and cancer diseases. The purpose was to synthesize the magnetite mercaptosilicate ion imprinted polymer adsorbent material by forming Ion-Imprinted Polymer as a template, to analyze the characterization results using XRD and SEM-EDS, and to determine the adsorption test results for Cd metal ions. The results of the characterization of XRD show that there is a broad peak at a diffraction angle of 2θ= 20-220 with an amorphous structure, which is silica, and there is a high peak at a diffraction angle of 2θ= 35.55140 which indicates magnetite. The results of SEM analysis with magnifications of 500x, 1000x, and 5000x showed that the surface morphology of the particles was not uniform. For the EDS results, it can be seen that the components of the magnetite mercaptosilicate ion imprinted polymer material are elements C, O, Si, S, and Fe, with a mass percentage of 25.0%; 41.2%; 29.9%; 3.28% and 0.8%. The results of the adsorption test for the Magnetite-IIP-Mercaptosilika Material were able to adsorb Cd ions with the highest adsorption capacity of 10.536 mg/g at a concentration of 100 mg/L. Then the selectivity coefficient value of the Ion Cd metal ion is 2.32 greater than 1, indicating that the selectivity of the magnetite mercaptosilicate ion imprinted polymer material is much higher for Ion Cd metal ions than for Cu and Cr ions with a selectivity coefficient of 0.1 and 0.26.
磁铁矿巯基硅酸盐离子印迹聚合物作为镉离子吸附剂的合成与表征
镉(Cd)是一种有毒的重金属,具有与其他成分反应的活性,因此镉残留物可以迅速进入食物链,导致心血管、肾脏和癌症疾病。目的是通过形成离子印迹聚合物(ion - imprinting polymer)作为模板,合成巯基硅酸磁铁矿离子印迹聚合物吸附剂材料,并利用XRD和SEM-EDS分析表征结果,确定对Cd金属离子的吸附测试结果。XRD表征结果表明:在2θ= 20-220衍射角处有一个宽峰,呈无定形结构,为二氧化硅;在2θ= 35.55140衍射角处有一个峰,为磁铁矿。放大500x、1000x、5000x的SEM分析结果表明,颗粒表面形貌不均匀。从EDS结果可以看出,磁铁矿巯基硅酸盐离子印迹聚合物材料的组分为C、O、Si、S和Fe元素,质量百分比为25.0%;41.2%;29.9%;3.28%和0.8%。吸附试验结果表明,在浓度为100 mg/L时,该材料对Cd离子的吸附量最高,达到10.536 mg/g。则Cd离子金属离子的选择性系数值为2.32 > 1,说明磁铁矿巯基硅酸盐离子印迹聚合物材料对Cd离子金属离子的选择性远高于Cu和Cr离子,其选择性系数分别为0.1和0.26。
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