Kurşun Çağla, Özkan Elvan Hasanoğlu, Uzun Demet, Koç Mümin Mehmet, Kurnaz Yetim Nurdan, Özcan Cemile
Department of Chemistry, Faculty of Arts and Sciences, Kırklareli University, 39100, Kırklareli, Turkey.
Department of Chemistry, Faculty of Sciences, Gazi University, Ankara, Turkey.
Environ Monit Assess. 2025 Jun 30;197(7):827. doi: 10.1007/s10661-025-14281-2.
Due to its toxic effects, hexavalent chromium (Cr(VI)) has mutagenic and carcinogenic impacts on living systems. Thus, developing effective adsorbents that can quickly adsorb heavy metals is crucial for the removal process. Thanks to their outstanding and novel characteristics, superparamagnetic iron oxide nanoparticles (SPIONs) are novel structures used in various applications. For this reason, novel dendrimer-functionalized SPIONs are used for the extraction and enrichment of Cr(VI). SPIONs were synthesized and characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction (XRD), transmission electron microscopy (TEM), and vibrating sample magnetometry (VSM) where their chemical compositions, crystal structures, and magnetic properties were assessed in detail. Various parameters such as the amount of adsorbent, pH, the type and concentration of eluent, adsorption time, and coexisting ions were evaluated to find the best adsorption conditions for SPIONs, where flame atomic absorption spectroscopy was used as the main investigation tool. Under the optimum conditions, the synthesized adsorbent showed an excellent selectivity towards Cr(VI) with an exceptional enrichment factor of 1403 in the presence of other interfering ions. The calibration graph was linear in the range of 0.25-2000 µg L (R = 0.9992), and the limit of detection (LOD, 3δ/m) was 0.075 µg L for Cr(VI). The relative standard deviation (RSD, n = 6) of the work for Cr(VI) was 2.8%. The proposed method was employed to real-life samples, including water, honey, and hardaliye (a traditional fermented grape juice).
由于其毒性作用，六价铬（Cr(VI)）对生物系统具有致突变和致癌影响。因此，开发能够快速吸附重金属的有效吸附剂对于去除过程至关重要。由于其优异和新颖的特性，超顺磁性氧化铁纳米颗粒（SPIONs）是用于各种应用的新型结构。因此，新型树枝状聚合物功能化的SPIONs被用于Cr(VI)的萃取和富集。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜-能量色散X射线光谱（SEM-EDX）、X射线衍射（XRD）、透射电子显微镜（TEM）和振动样品磁强计（VSM）对SPIONs进行了合成和表征，详细评估了它们的化学成分、晶体结构和磁性。评估了吸附剂用量、pH值、洗脱剂类型和浓度、吸附时间以及共存离子等各种参数，以找到SPIONs的最佳吸附条件，其中火焰原子吸收光谱法用作主要研究工具。在最佳条件下，合成的吸附剂对Cr(VI)表现出优异的选择性，在存在其他干扰离子的情况下，富集因子高达1403。校准曲线在0.25 - 2000 μg/L范围内呈线性（R = 0.9992），Cr(VI)的检测限（LOD，3δ/m）为0.075 μg/L。Cr(VI)测定工作的相对标准偏差（RSD，n = 6）为2.8%。所提出的方法应用于实际样品，包括水、蜂蜜和哈达利耶（一种传统发酵葡萄汁）。
