Rice husk derived activated carbons doped with nitrogen have been studied using low temperature nitrogen adsorption, scanning electron microscopy, mercury porosimetry, thermogravimetric analysis combined with mass-spectrometry, differential scanning calorimetry and X-ray photoelectron spectroscopy. It has been shown that N-doped activated carbon produced by high temperature treatment of the starting material soaked with urea, has a significantly higher anion exchange capacity than the other samples studied, which correlates with its higher adsorption capacity towards nitrate ion removal from aqueous solutions with the initial concentration of 5 and 15 ppm.
Merkel, A., Satayeva, AR., Cannon, F., Howell, C., Meikle, S., Laszlo, K., Inglezakis, V., Jandosov, J., Ray, S., Mansurov, Z., & Mikhalovsky, S. (2016). Characterisation of Activated Carbons Obtained from Rice Husk. Eurasian Chemico-Technological Journal, 18(4), 299-304. https://doi.org/10.18321/ectj472