School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China.
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China.
J Hazard Mater. 2022 Feb 15;424(Pt B):127510. doi: 10.1016/j.jhazmat.2021.127510. Epub 2021 Oct 13.
3-Nitro-1, 2, 4-triazole-5-one (NTO) is an important insensitive explosive. The discharge of NTO wastewater not only pollutes the environment but also causes the economic loss of the valuable explosive. Currently, the NTO wastewater in industrial production is often treated with activated carbon adsorbents. There are no green, efficient and specific adsorption materials for the NTO treatment yet. In the present work, polymer materials suitable for NTO adsorption were screened by molecular dynamics simulation. With the optimized materials, a carrageenan/chitosan/calcium ion physically cross-linked double network hydrogel (KC/CTS/Ca PCDNH) was successfully prepared by the semi-soluble-acidified sol-gel conversion method. The structure and NTO adsorption performance of the hydrogel were investigated by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The NTO adsorption kinetics, isotherm, and thermodynamics were further studied to understand the adsorption behavior and mechanism. In addition, the adsorbed NTO was successfully released and recovered by soaking the hydrogel in NaOH solution. Our work has provided an environmentally friendly and targeted preparation method of NTO adsorbent materials for NTO wastewater treatment.
3-硝基-1,2,4-三唑-5-酮（NTO）是一种重要的钝感炸药。NTO 废水的排放不仅污染环境，而且会造成有价值炸药的经济损失。目前，工业生产中的 NTO 废水通常采用活性炭吸附剂处理。然而，目前还没有专门用于 NTO 处理的绿色、高效吸附材料。在本工作中，通过分子动力学模拟筛选出适合 NTO 吸附的聚合物材料。利用优化后的材料，采用半溶酸酸化溶胶-凝胶转化法成功制备了卡拉胶/壳聚糖/钙离子物理交联双网络水凝胶（KC/CTS/Ca PCDNH）。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和 X 射线光电子能谱（XPS）对水凝胶的结构和 NTO 吸附性能进行了研究。进一步研究了 NTO 的吸附动力学、吸附等温线和热力学，以了解吸附行为和机制。此外，通过将水凝胶浸泡在 NaOH 溶液中，成功地将吸附的 NTO 释放和回收。我们的工作为 NTO 废水处理提供了一种环保、有针对性的 NTO 吸附材料的制备方法。
