Dravida Petroleum DMCC, ONGC BVG EPS, B-Athivaraganatham, Cuddalore, 608601, Tamil Nadu, India.
Department of Nanoscience and Technology, University College of Engineering, BIT Campus, Anna University, Tiruchirappalli, 620 024, Tamil Nadu, India.
Chemosphere. 2022 Feb;288(Pt 1):132405. doi: 10.1016/j.chemosphere.2021.132405. Epub 2021 Sep 28.
In this study, Kaolin clay, a mining material, was used as an abundant and available mineral as zero-valent iron-kaolinite composites for AsO removal from the water samples. The composites were made by the sodium borohydrate reduction method. The existence of Fe in the produced composites was confirmed by X-ray diffraction (XRD) and Fourier-Transform Infrared Spectroscopy (FTIR) analysis. The membranes are prepared with zerovalent nano Iron-Kaolin and PES. The synthesized composites were then mixed with polyethersulfone to prepare the membranes S1, S2, and S3 with varying compositions. Field Emission Scanning Electron Microscopy (FESEM) analysis of the produced membranes showed the porous structure and the contact angle of membranes increased the hydrophilicity. The membranes were explored for the removal of AsO (AsIII) in potable water samples. The filtration studies were carried out using the syringe filtration setup. Analysis of the arsenic (III) solution was carried out, before and after the filtration process using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), which showed a maximum of 50% reduction in its original concentration. The filtered membrane is analyzed for arsenic by Energy Dispersive X-ray (EDX) technique. Thus, the synthesized membrane effectively sieves the arsenic in water samples.
在这项研究中，高岭土粘土作为一种丰富且可用的矿物，被用作零价铁-高岭土复合材料，用于从水样中去除 AsO。复合材料是通过硼氢化钠还原法制备的。X 射线衍射（XRD）和傅里叶变换红外光谱（FTIR）分析证实了所制备的复合材料中存在 Fe。使用零价纳米铁-高岭土和 PES 制备膜。然后将合成的复合材料与聚醚砜混合，制备不同组成的 S1、S2 和 S3 膜。对所制备的膜进行场发射扫描电子显微镜（FESEM）分析表明，其具有多孔结构，且接触角的增加提高了亲水性。利用这些膜去除饮用水样中的 AsO（AsIII）。通过注射器过滤装置进行过滤研究。使用电感耦合等离子体发射光谱（ICP-OES）对砷（III）溶液进行分析，在过滤前后进行，结果表明其原始浓度最大降低了 50%。通过能量色散 X 射线（EDX）技术对过滤后的膜进行砷分析。因此，所合成的膜能有效地对水样中的砷进行筛分。
