摘要
实验研究了丝光沸石对生活污水中氨氮的吸附行为。结果表明,在投加25g/L丝光沸石,吸附时间40min,pH=6.2的条件下,丝光沸石对浓度为50mg/L的氨氮模拟废水其去除率可达80%以上。Ca^(2+)、Mg^(2+)竞争阳离子在一定程度上抑制丝光沸石对氨氮的吸附。丝光沸石对氨氮的吸附符合朗格缪尔吸附等温线。同时,可用饱和氯化钠溶液对沸石进行再生,此解吸液可重复利用。将丝光沸石用于实际生活污水中氨氮的处理,其去除率达到80%以上。
Adsorption of ammonia nitrogen by mordenite was studied. Results indicated that total removal efficiency of ammonia nitrogen in simulated wastewater could reach above 80% in the conditions of mordenite 25g/L,contact time 40min,pH 6.2.Calcium/magnesium cations restrained the adsorption in a certain extent.The adsorption behavior of ammonia nitrogen by mordenite fits the Langmiur isotherm well.Mordenite can be regenerated by saturated solution of sodium chloride.Total removal efficiency of ammonia nitrogen could be up to 80% in the treatment of real municipal wastewater.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2007年第9期9-10,17,共3页
Environmental Science & Technology
基金
国家863项目(2006AA022211)
江苏省自然科学基金(BK2006181)
江苏省省级污染防治专项资金(2006-1-W-19)
关键词
丝光沸石
生活污水
氨氮
吸附
mordenite
municipal wastewater
ammonia nitrogen
adsorption
