含三胺的活性稻壳灰作为从水溶液中去除硝酸盐的先进功能材料。
Triamine-bearing activated rice husk ash as an advanced functional material for nitrate removal from aqueous solution.
作者信息
Phan Phuoc Toan, Nguyen Trung Thanh, Nguyen Nhat Huy, Padungthon Surapol
机构信息
Faculty of Engineering - Technology - Environment, An Giang University, 18 Ung Van Khiem street, Dong Xuyen Dist., Long Xuyen City, An Giang Prov., Vietnam E-mail:
Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, VNU-HCM, 268 Ly Thuong Kiet St., Dist. 10, Ho Chi Minh City, Vietnam.
出版信息
Water Sci Technol. 2019 Mar;79(5):850-856. doi: 10.2166/wst.2018.445.
In this study, we proposed a simple method for preparing triamine-bearing activated rice husk ash material (TRI-ARHA) as an advanced functional material with high nitrate adsorption capacity and durability. The novel TRI-ARHA was generated via a post-synthesis grafting method and modified by acidification to form ammonium moiety. TRI-ARHA was then characterized by using thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy and SEM-mapping. The TRI-ARHA had high nitrate adsorption capacity of 163.4 mgNO /g, which was 2.06 times higher than that of a commercial anion exchange resin (Akualite A420) due to strong interactions of Si, C, and N in the material structure. This functional material with good durability after 10 cycles could be very promising for adsorption of other anions (e.g. sulfate and phosphate) in water and wastewater treatment.
在本研究中，我们提出了一种制备含三胺活性稻壳灰材料（TRI-ARHA）的简单方法，该材料是一种具有高硝酸盐吸附容量和耐久性的先进功能材料。新型TRI-ARHA通过合成后接枝法制备，并经酸化改性形成铵基部分。然后利用热重分析、傅里叶变换红外光谱、X射线衍射、扫描电子显微镜（SEM）、能量色散X射线光谱和SEM映射对TRI-ARHA进行了表征。TRI-ARHA具有163.4 mgNO₃⁻/g的高硝酸盐吸附容量，由于材料结构中Si、C和N的强相互作用，其吸附容量比商业阴离子交换树脂（Akualite A420）高2.06倍。这种在10次循环后仍具有良好耐久性的功能材料，在水和废水处理中对其他阴离子（如硫酸根和磷酸根）的吸附方面可能非常有前景。
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