纳米分子筛和硅藻土去除水中氨氮的比较研究

为了解纳米分子筛和硅藻土去除水中氨氮的可行性,分别进行了单独投加纳米分子筛和硅藻土去除水中氨氮的研究,而且考察了纳米分子筛和硅藻土复配去除氨氮的可行性,结果表明,单独投加纳米分子筛时,纳米分子筛对溶液中氨氮具有吸附速度快的特点,在吸附时间5 min时即可达吸附容量的90%,但存在着反应后溶液偏碱性,溶液浊度大幅度增高的现象,且反应后溶液pH值和溶液中浊度与纳米分子筛投加量间存在良好的函数关系;单独投加硅藻土时,硅藻土对溶液中氨氮几乎没有作用,反应前后溶液中氨氮质量浓度几乎没变,但投加硅藻土后溶液显酸性,而且硅藻土的沉降速度比较快;纳米分子筛和硅藻土复配后大大改善了溶液的pH环境,对氨氮的去除率明显高于单独投加纳米分子筛的去除率.

Comparative study on ammonia removal effect by nano-zeolite and diatomite

To find out the feasibility of ammonia removal effect by nano-zeolite and diatomite,this paper studies the removal effect of ammonia by nano-zeolite and by diatomite respectively,and studies it by nano-zeolite and diatomite together.Experimental results showed that fast adsorption velocity is one of the characteristics of nano-zeolite,the adsorption amount of ammonia has reached 90% of nano-zeolite adsorption capacity within 5 minutes,but some questions occurred,such as the solution is alkaline and the turbidity is enhanced greatly after reaction,furthermore,the pH value or the turbidity and the amount of namo-zeolite follows certain functions;diatomite has nothing effect on ammonia,the solution concentration of ammonia is almost the same after the reaction to the initial,but the solution is acidic,and the sedimentation velocity is relatively faster;the pH value of solution has been improved and the removal rate of ammonia is evidently higher by nano-zeolite and diatomite together than the nano-zeolite individually.