LIN Hai, YANG Su, HUO Hanxin, et al. Effect of sodium chloride on microwave-assisted removal of ammonia nitrogen by natural zeolite[J]. CIESC Journal, 2013, (8): 2989-2995.
LIN Hai, YANG Su, HUO Hanxin, et al. Effect of sodium chloride on microwave-assisted removal of ammonia nitrogen by natural zeolite[J]. CIESC Journal, 2013, (8): 2989-2995.DOI: 10.3969/j.issn.0438-1157.2013.08.041.
The effect of additive NaCl on microwave-assisted removal of ammonia nitrogen by natural zeolite
including factors influencing adsorption and ion-exchange
was investigated.The results show that microwave-assisted can greatly improve the efficiency of zeolite denitrification.The best conditions are:microwave power 343 W
time 4 min
concentration of NaCl 4%
size of zeolite particles 0.1-0.15 mm
and the best removal efficiency is up to 99.70%.As a comparison
no NaCl addition but microwave auxiliary
the removal rate of ammonia nitrogen by zeolite is 76.46%. If only zeolite was employed the removal rate is 60.70%.So the increase of efficiency is significant
39%
15.76% respectively. The results of zeolite surface morphology and element measurements by SEM
EDS and XRD indicated that sodium chloride could improve microwave heating and ion exchange of zeolite.Its ion exchange capacity for ammonia at microwave condition increases greatly by NaCl.