Abstract

Arsenic contamination of water in the Red River and Mekong deltas brings the largest mass poisoning calamity in human history because drinking of arsenic contaminated water can cause cancers of the skin, lungs, bladder and kidney and other harmful diseases. In general, the arsenic exists in difference oxidation states such as –3, 0, +3, and +5, among which As(+3) has been considered as the most dangerous contaminant in the water. Synthesis of nature friendly and low cost, portable, and effective adsorbent for removal of arsenic in contaminated water is very essential for many countries where development of large industrial setup is difficult. In this work, we introduce a facile method for preparation of Iron Oxide (Fe₂O₃) coated N-doped Titanium Oxide (TiO₂) nanoparticles (FNT NPs) towards effective removal of As(III) from drinking water. The FNT NPs were synthesized by a scalable low temperature, solution based hydrothermal method using as Iron(III) chloride (FeCl₃), and N‑doped TiO₂ NPs as starting materials. The prepared FNT NPs were characterized by Scanning electron microscopy (SEM), Energy-Dispersive X-Ray (EDS), and Transmission electron microscopy (TEM), whereas the As(III) adsorption studied were done using Inductively coupled plasma mass spectrometry (ICP) analysis. Results pointed out that the high quality FNT NPs were successfully synthesized by a low temperature hydrothermal method with uniform size and shape. The adsorption test confirmed that the prepared FNT NPs can effectively remove the As from the water. The results shows 99.34% As(III) form water was adsorbed using the prepared FNT NPs within 60 min. The results shows synthesized FNT NPs, could provide large specific surface area for effective adsorption sites for capturing and removal of As(III) in the water.

中文翻译：

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使用便捷合成的Fe 2 O 3包覆的N掺杂TiO 2纳米颗粒有效去除饮用水中的砷

摘要

在红河和湄公河三角洲，水的砷污染带来了人类历史上最大的大规模中毒灾难，因为喝被砷污染的水会导致皮肤，肺，膀胱和肾脏的癌症以及其他有害疾病。通常，砷以–3、0，+ 3和+5等不同的氧化态存在，其中As（+3）被认为是水中最危险的污染物。对于许多难以发展大型工业设施的国家而言，合成自然友好，低成本，便携式且有效的吸附剂以去除污水中的砷是非常重要的。在这项工作中，我们介绍了一种制备氧化铁（Fe ₂ O ₃）涂覆的N掺杂二氧化钛（TiO ₂）的简便方法）纳米颗粒（FNT NPs），以有效地从饮用水中去除As（III）。FNT NPs是通过可扩展的低温，基于溶液的水热方法合成的，使用氯化铁（III）（FeCl ₃）和N掺杂的TiO ₂NP作为起始原料。通过扫描电子显微镜（SEM），能量色散X射线（EDS）和透射电子显微镜（TEM）对制备的FNT NP进行表征，而所研究的As（III）吸附使用电感耦合等离子体质谱仪（ICP）完成）分析。结果表明，采用低温水热法合成了尺寸和形状均一的高质量FNT NPs。吸附实验表明，所制备的FNT NPs能够有效去除水中的As。结果表明，使用制备的FNT NP在60分钟内吸附了99.34％的As（III）形式的水。结果表明，合成的FNT NPs可以为有效的吸附位点提供较大的比表面积，以有效地捕获和去除水中的As（III）。