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针对天然沸石因内部存在大量杂质导致其离子交换吸附性能较低，无法有效吸附废水中氨氮问题，研究了采用无机酸、无机碱和无机盐等对天然沸石进行改性，考察了天然沸石在不同氨氮初始质量浓度、沸石粒径、沸石用量、反应时间条件下对氨氮吸附性能的影响，对比了不同改性条件下的沸石对氨氮的吸附效果。结果表明：天然沸石的氨氮吸附率随沸石粒径、氨氮初始质量浓度增大逐渐降低，而随沸石用量增大和反应时间延长逐渐升高；氯化钠改性沸石的氨氮吸附效果明显优于无机酸和无机碱改性沸石，以及其他无机盐改性沸石，当氯化钠浓度为0.8 mol/L时，氨氮吸附率达78.0%,是天然沸石的1.64倍。
Abstract：To address the issue of low ion exchange adsorption performance of natural zeolite caused by the presence of impurities, which makes it ineffective in adsorbing ammonia nitrogen in wastewater, the modification of natural zeolite using inorganic acids, inorganic bases, and inorganic salts was studied.The effects of different initial ammonia nitrogen mass concentration, zeolite particle size, zeolite dosage and reaction time on ammonia nitrogen adsorption performance of natural zeolite were investigated.The adsorption effects of zeolite under different modification conditions on ammonia nitrogen were compared.The results indicate that the ammonia nitrogen adsorption rate of natural zeolite gradually decreases with the increase of zeolite particle size and initial ammonia nitrogen mass concentration, and gradually increases with the increase of zeolite dosage and reaction time.The ammonia nitrogen adsorption effect of zeolite modified by sodium chloride is significantly better than that of zeolite modified by inorganic acids and inorganic bases, as well as other inorganic salts.When the sodium chloride concentration is 0.8 mol/L,the ammonia nitrogen adsorption rate can reach 78.0%,which is 1.64 times that of natural zeolite.
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基本信息:
DOI：10.13355/j.cnki.sfyj.2025.03.015
中图分类号:X703
引用信息:
[1]王亚兰,牛洁,冀东等.天然沸石及改性沸石对废水中氨氮吸附性能的对比研究[J].湿法冶金,2025,44(03):406-411.DOI:10.13355/j.cnki.sfyj.2025.03.015.
基金信息: