泡沫水泥负载镍基催化剂制备及在污水处理中的潜在应用研究

Preparation of Nickel-Based Catalyst Loading on Foam Cement and Its Application in Sewage Treatment

医院和城市污水含有大量的活体微生物,常用强氧化剂NaClO进行处理,以达到杀毒灭菌的目的。本研究采用蛋白发泡剂发泡法制备泡沫水泥载体材料,通过其在NiCl2溶液中浸泡浸渍、干燥、水解和氧化处理,制备了泡沫水泥表面负载NiOOH的多孔镍基催化剂。将次甲基蓝用作镍基催化剂催化分解NaClO速率的标识物,以次甲基蓝氧化褪色速率模拟污水中病原微生物等被杀灭的速度和深度。研究了催化剂负载量、NaClO用量、温度、溶液pH值、时间等对NaClO分解速率的影响和对次甲基蓝氧化褪色速率的影响,结果表明多孔镍基催化剂能有效催化NaClO分解,极大提高次甲基蓝氧化褪色速率。

Sodium hypochlorite （NaCIO）, a strong oxidizing agent, has been widely used in hospital and household sewage treatment, by sterilizing the abundant microorganisms. By using protein foaming agent to prepare the foam cement as carrier and being processed through soaking in NiC12 solution, drying, hydration and oxidation, the present study developed the muhiporous Nickel-based catalyst, namely NiOOH carried by foam cement. To simulate the efficiency of pathogen sterilization in sewage treatment, the fading rate of methylene blue was used to measure the catalytic effect of Nickel-based catalyst. We investigated the effect of catalyst load size, volume of NaCIO, temperature, pH value, and time on both NaCIO decomposition efficacy and the fading rate of methylene blue. In conclusion, the muhiporous Nickel-based catalyst could catalyze the decomposition of NaC10 efficiently, and remarkably promote the fading rate of methylene blue.