改性活性炭纤维催化碳酰肼去除给水中的溶解氧

将制备的水热改性活性炭纤维负载Ni(Ni/GSACF)作为催化剂,催化碳酰肼还原去除水中的溶解氧(DO),考察反应时间、反应温度、初始pH值、碳酰肼质量浓度和催化剂质量浓度对DO去除效果的影响.在优化条件下,45 min后水中的DO质量浓度从5.1 mg·L^-1降至0.1 mg·L^-1,去除率可达98.0%.对载体和催化剂进行表征分析,水热处理后GSACF表面的含氧官能团明显增加,催化剂表面具有均匀分散的活性Ni物种.研究结果表明:活性炭纤维表面含氧官能团的增加有利于促进活性Ni物种在活性炭纤维表面的分散,从而提高Ni/GSACF催化剂的催化除氧性能.

Reduction of Dissolved Oxygen in Feed Water by Carbohydrazide With Modified Activated Carbon Fiber Catalysts

Water thermal modified activated carbon fiber loaded Ni(Ni/GSACF)were prepared and used as catalysts to remove the dissolved oxygen(DO)in water by catalyzing the reduction reaction of carbohydrazide. The effects of reaction time, temperature, initial pH and the concentration of carbohydrazide and catalyst on Ni/GSACF catalytic performance in DO reduction by carbohydrazide were investigated. In the optimization condition, the DO concentration in water was reduced to 0.1 mg·L^-1 from 5.1 mg·L^-1 in 45 min by the Ni/GSACF catalysts, and the removal rate reached 98.0%. The supports and catalysts were characterized, the oxygen-containing functional groups on the surface of GSACF were increased significantly after water thermal treatment, and the surface of the catalysts had a uniformly dispersed active Ni species. The results revealed that the increase of oxygen-containing functional groups in activated carbon fiber promoted the dispersion of the active Ni species and improved the catalytic activity in the reduction of DO by carbohydrazide.