Contamination of surface water by extremely poisonous arsenic (As) species due to indiscriminant disposal of industrial and mining waste is a serious concern worldwide. Considering the above apprehension, maghemite (γ-Fe₂O₃) and graphene oxide (GO) embedded in a polyacrylonitrile (PAN) polymer nanofiber matrix (PAN/GO/γ-Fe₂O₃) was successfully fabricated by electrospinning technique. Successful incorporation of γ-Fe₂O₃ and GO into the PAN polymer matrix via the electrospinning process was investigated by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and Raman analytical techniques. Magnetic and thermal properties of the prepared nanofibers were studied by vibrating sample magnetometer (VSM) and thermogravimetry–derivative thermogravimetry (TG-DTG) analysis. The specific surface area of the prepared adsorbent was found to be 30.24 m²/g, which was determined by Brunauer, Emmett, and Teller (BET) analysis. Batch adsorption experiments were conducted to study the effect of various parameters such as the effect of adsorbent dosage, pH, time, concentration, and coexisting ions during arsenate ion (As(V)) adsorption. The kinetic and isotherm model indicates that the adsorption process follows the pseudo-second-order and Langmuir isotherm model, respectively, which reveals the chemisorption mechanism. From the Langmuir plot, the maximum adsorption capacity was found to be 36.1 mg/g, which is considerably greater than the earlier reported results. The stability and reusability of the membrane were demonstrated by five successive sorption–desorption cycles. After all, the As(V) loaded PAN/GO/γ-Fe₂O₃ nanofiber membrane was analyzed by FTIR, TEM-EDAX, and X-ray photoelectron spectroscopy (XPS) analytical technique to elucidate the possible adsorption mechanism, which suggests electrostatic attraction and surface complexation are the main driving forces for As(V) removal.

中文翻译：

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磁赤铁矿和氧化石墨烯嵌入的聚丙烯腈电纺纳米纤维基质用于修复砷离子。

由于不加区别地处置工业和采矿废物，极毒的砷（As）物质污染了地表水，这已成为世界范围内的一个严重问题。考虑到上述忧虑，磁赤铁矿（γ-的Fe ₂ ö ₃嵌入在聚丙烯腈（PAN）聚合物纳米纤维基质（PAN / GO /γ-Fe）和氧化石墨烯（GO）₂ ö ₃）成功通过静电技术制造。的成功掺入了γ-Fe ₂ ö ₃通过傅里叶变换红外光谱（FTIR），X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM）和拉曼分析技术研究了通过静电纺丝过程将GO和GO转变为PAN聚合物基体的过程。通过振动样品磁力计（VSM）和热重分析-导数热重分析（TG-DTG）分析研究了制备的纳米纤维的磁学和热学性质。发现制备的吸附剂的比表面积为30.24m ^2。/ g，由Brunauer，Emmett和Teller（BET）分析确定。进行了批量吸附实验，以研究各种参数的影响，例如砷离子（As（V））吸附过程中吸附剂剂量，pH，时间，浓度和共存离子的影响。动力学和等温线模型表明，吸附过程分别遵循拟二级和Langmuir等温线模型，揭示了化学吸附机理。从Langmuir图可知，最大吸附容量为36.1 mg / g，这比先前报道的结果要大得多。五个连续的吸附-解吸循环证明了膜的稳定性和可重复使用性。毕竟，由于（V）加载PAN / GO /γ-的Fe ₂ ö ₃ 通过FTIR，TEM-EDAX和X射线光电子能谱（XPS）分析技术对纳米纤维膜进行了分析，以阐明可能的吸附机理，这表明静电吸引和表面络合是As（V）去除的主要驱动力。