研究稻壳基活性炭去除水中硝酸盐污染。
Investigation of rice husk derived activated carbon for removal of nitrate contamination from water.
机构信息
Environmental Science & Technology Group (ESTg), Chemical Engineering Department, School of Engineering, Nazarbayev University, Astana, Kazakhstan.
School of Pharmacy and Biomolecular Sciences, University of Brighton, UK.
出版信息
Sci Total Environ. 2018 Jul 15;630:1237-1245. doi: 10.1016/j.scitotenv.2018.02.329. Epub 2018 Mar 7.
Development of porous carbons with high specific surface area (>1200mg) targeted at nitrate removal from aqueous solutions is investigated by chemical activation of carbonized rice husk. Potassium carbonate is used as activating and desilicating agent. The effect of post-synthetic treatment by gas phase ammoxidation with ozone/ammonia or oxidation with concentrated nitric acid followed by nitrification with urea on main physicochemical properties and on the effectiveness of the activated carbons in nitrate removal is compared with those determined for a pristine activated carbonized rice husk sample. The two-fold enhancement of nitrate removal by the urea-modified activated carbon in comparison with pristine and ammoxidated sample is in direct correlation with the development of surface basic groups.
研究了通过碳化稻壳的化学活化来制备比表面积大于 1200mg 的多孔碳，以去除水溶液中的硝酸盐。使用碳酸钾作为活化和脱硅剂。对比了臭氧/氨气相后合成处理、浓硝酸氧化后硝化用尿素处理对主要物理化学性质和对活化碳去除硝酸盐效果的影响，与原始碳化稻壳样品的性质和效果进行了对比。与原始和氨氧化样品相比，尿素改性的活性炭对硝酸盐的去除能力提高了两倍，这与表面碱性基团的发展直接相关。
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