Experimental Study on Treatment of Ammonia Nitrogen in Seawater by Natural Zeolite

研究以开发经济型处理低浓度含氨海水的工艺为目标,选用对氨氮有较强选择性和吸附性的天然斜发沸石作为吸附材料,将含氨氮海水通过烧杯实验和连续通水实验,系统地考察进水氨氮的浓度、pH值、沸石用量,以及洗脱条件对氨氮吸附特性的影响.结果表明,新鲜沸石处理低浓度含氨氮海水效果较好,去除效率可以达到75%左右;新鲜沸石穿透后,用海水+HCl的洗脱效果最佳,洗脱率可以达到98.2%.The aim of this work is to develop an economical proess to remove NH+4-N from the seawater.The natural zeolite was employed as a specific sorbent,which have relatively strong selectivity and adorability to NH+4-N.The effects of NH+4-N load,pH value,and regeneration times on the NH+4-N removal behavior were investigated by the batch and continuous experiments.The results indicate that the removal efficiency of NH+4-N could reach 75% by using fresh zeolite.The best of regeneration method was to treat NH+4-N saturated zeolite by seawater firstly and HCl secondly,and the maximum regeneration efficiency could reach about 98.2%.福建省自然科学基金资助项目(D0610021);; 福建省科技计划项目(2005N046