泡沫陶瓷基氢氧化高镍催化剂的制备及模拟污水处理研究

Study on preparation of ceramic foams-based nickelic hydroxide catalyst and simulated sewage treatment

摘要:

本研究以活性炭为造孔剂制备泡沫陶瓷，通过浸渍法使NiCl2负载于泡沫陶瓷，再与NaClO和NaOH混合溶液反应生成NiOOH催化剂. 以一定浓度的亚甲基蓝为污水模拟物，亚甲基蓝褪色时间来衡量NiOOH催化剂的催化性能. 以催化剂量、次氯酸钠量、pH、温度为变量，分别通过单因素实验和正交试验探究了它们对催化效果的影响以及确定污水处理的较优组合条件. 结果表明，在温度为55℃、pH为8、催化剂量为1.0g、NaClO量为15.0mL时，亚甲基蓝的完全褪色时间为131min. 各因素对污水处理效果的影响顺序为温度>催化剂量>pH>NaClO量. 污水处理的最佳实用组合条件为温度为35℃、pH为8、催化剂量为1.0g、NaClO量为15.0mL.

Abstract:

Activated carbon was used as the pore forming agent to prepare ceramic foams on which NiCl2 was loaded by impregnation, followed by reaction with NaClO and NaOH mixed solution to generate NiOOH catalyst. Methylene blue was employed as the sewage simulacrum, and the catalytic performance of NiOOH catalyst was measured by fading time of methylene blue. The dosages of catalyst and sodium hypochlorite, pH, and temperature were used as variables to explore the influences on catalytic effect of sewage treatment and determine the optimal combination conditions by the single factor and orthogonal test, respectively. The results indicate that the complete fading time of methylene blue is 131 min when the temperature, pH, dosages of catalyst and NaClO are 55 oC, 8, 1.0 g and 15.0 mL, respectively. Sequence of significant effect of factors on fading time of methylene blue is temperature > dosage of catalyst > pH >dosage of NaClO. The optimal practical combination conditions for sewage treatment are confirmed as that the temperature, pH value, and the dosages of catalyst and NaClO are 35 oC, 8, 1.0 g, and 15.0 mL, respectively.