水热改性对活性炭纤维催化去除再生水中溶解氧的影响

Effect of hydrothermal modification on the performance of activated carbon fiber for dissolved oxygen catalytic removal from reclaimed water

催化氧化法是去除再生水中溶解氧(DO)的一种有效的手段。利用水热法对活性炭纤维(ACF)进行改性,将其作为催化剂促进碳酰肼氧化去除水中DO,探索最佳水热改性条件,对水热改性ACF的催化机制进行分析。结果表明,最佳水热改性条件为水热温度270℃,水热时间3 h,制得改性ACF可使碳酰肼的DO去除率从31.88%提高到62.65%。水热改性改善了ACF的孔道结构,增加了ACF表面含氧官能团数量,从而更有利于除氧过程的进行,研究结果为后续深入提高DO去除效果提供了理论依据。

Catalytic oxidation is a particularly efficient method to remove dissolved oxygen(DO)from reclaimed water.The hydrothermal method was used to modify activated carbon fiber(ACF).The obtained hydrothermal modified ACF was used as catalyst to enhance the oxidation removal of DO from reclaimed water by carbonyl hydrazide.The optimal hydrothermal modification conditions were explored,and the catalytic mechanism of hydrothermally modified ACF was analyzed.The results showed that the optimal hydrothermal modification conditions were hydrothermal temperature of 270℃and hydrothermal time for 3 h,the obtained modified ACF could increase the DO removal rate of carbonyl hydrazide from 31.88%to 62.65%.The hydrothermal modification improves the pore structure of ACF and increases the number of oxygen-containing functional groups in ACF,which were more conducive to the oxygen removal process.The results of this paper could provide a theoretical basis for further improving the DO removal effect.