NaCl改性沸石充释氧性能及对黑臭水体中氨氮去除效能研究  

Study on oxygen filling and release performance of NaCl modified zeolite and its effect on ammonia nitrogen removal in black and odorous water

作　　者：毛雪 崔建国[1] MAO Xue;CUI Jian-guo(Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西太原030024

出　　处：《应用化工》2024年第2期277-281,共5页Applied Chemical Industry

基　　金：国家自然科学基金(21676178);山西省自然科学基金项目(201701D121126)。

摘　　要：基于天然沸石的多孔性能和对氨氮具有良好的选择吸附特性,利用NaCl对其进行改性,研究其载氧、锁氧和缓释氧能力,并以模拟黑臭水体为对象,研究初始氨氮浓度、温度、pH等条件对改性沸石吸附氨氮能力的影响。结果表明,1.0 mol/L NaCl改性天然沸石可将模拟黑臭废水中溶解氧浓度从0.2 mg/L提高到7.2 mg/L,并保持数周,说明改性沸石具有锁氧功能,并且氧的缓释效果明显,有利于持续较长时间的水处理过程;在改性沸石材料投加量为10 g/L,pH为7,温度为25℃,初始浓度为30 mg/L的条件下对氨氮的去除率可达91.0%,表明改性沸石对改善高氨氮水质具有显著而高效的作用。Based on the porous properties of natural zeolite and good selective adsorption characteristics of ammonia nitrogen,NaCl was used to modify it,and its oxygen-loading,oxygen-locking and slow-release oxygen capacity was studied,and the effects of initial ammonia nitrogen concentration,temperature,pH and other conditions on the adsorption ability of modified zeolite were studied by simulating black and odorous water.The results showed that 1.0 mol/L NaCl modified natural zeolite could increase the dissolved oxygen concentration in simulated black odor wastewater from 0.2 mg/L to 7.2 mg/L for several weeks.It was explained that the modified zeolite had the function of oxygen locking,and the slow-release effect of oxygen was obvious,which was conducive to the water treatment process that lasted for a long time.Under the conditions of 10 g/L,pH 7,temperature of 25℃and initial concentration of 30 mg/L,the removal rate of ammonia nitrogen can reach 91.0%,indicating that modified zeolite has a significant and efficient effect on improving the quality of high ammonia nitrogen.

关 键 词：NaCl改性沸石 缓释氧 氨氮去除 黑臭水体 

分 类 号：TQ113[化学工程—无机化工] X7033[环境科学与工程—环境工程]