农业资源与环境学报Issue(3)：250-256,7.DOI:10.13254/j.jare.2015.0008
天然沸石对水中氨氮吸附特性的研究
Characteristics of Ammonia Nitrogen Adsorption on Natural Zeolite in Water
摘要
Abstract
Taking Zhejiang Jinyun natural zeolite as raw material, the static and dynamic characteristics of ammonia nitrogen adsorption were studied by shaking table and column experiment, respectively. Results showed that ammonia nitrogen adsorption by zeolite was significant difference(P<0.05)at 10, 25, 40℃. At initial ammonia nitrogen concentration of 50 mg·L-1, the adsorption capacity of 1~2 mm zeolite to am-monia nitrogen was 4.05±0.02 mg·g-1 at 25℃within 360 min. Adsorption process of ammonia nitrogen on natural zeolite followed two stage adsorption kinetics equation. Isothermal adsorption of ammonia nitrogen by zeolite could be fitted by both the Langmuir and Freundlich isother-mal adsorption equation, and the correlation analysis of Langmuir equation was significant correlation(P<0.01), which could better describe the thermodynamic process of the ammonia nitrogen adsorption on zeolite. With reducing particle size and dosage of zeolite, adsorption ca-pacity of zeolite to ammonia nitrogen increased significantly. The optimum adsorption capacity of ammonium was obtained at pH value in the range of 6.0~8.0. Dynamic tests showed when the ammonia nitrogen concentration was 50 mg·L-1, zeolite of breakthrough time was about 96 h, the saturated adsorption capacity was 18.8 mg·g-1.关键词
沸石/氨氮/吸附/等温吸附方程/穿透曲线Key words
zeolite/ammonia-nitrogen/adsorption/isothermal adsorption equation/breakthrough curve分类
资源环境引用本文复制引用
许育新,喻曼,陈喜靖,安文浩,王云龙,肖华,沈阿林..天然沸石对水中氨氮吸附特性的研究[J].农业资源与环境学报,2015,(3):250-256,7.基金项目
浙江省公益技术研究社会发展项目（2012C23045）；浙江省农科院创新提升工程项目 （）
