磷酸铵镁沉淀与沸石吸附组合工艺处理海水中的氨氮研究开发.PDF
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·2060 · CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 2015 年第 34 卷第 7 期
研究开发
磷酸铵镁沉淀与沸石吸附组合工艺处理海水中的氨氮
王文华,张晓青,邱金泉,司晓光,成玉,王静,张雨山
(国家海洋局天津海水淡化与综合利用研究所,天津 300192 )
摘要:大量陆源营养物质的输入是导致我国近岸海域富营养化问题的主要原因,传统生化法对海水中氮磷处理
能力有限,天然沸石凭借较强的选择性离子交换性能已成为一种较为经济和高效的水处理材料。本研究通过穿
透实验考察了天然沸石对海水中氨氮的动态吸附性能,采用磷酸铵镁(MAP )沉淀和沸石吸附组合工艺对海水
中氨氮进行处理。实验结果表明,天然沸石吸附氨氮达平衡时间随过滤速度的增大而减小,随滤层高度的增加
而增大,Logistic 模型能较好反映天然沸石对海水中氨氮的动态吸附过程。MAP 沉淀法与沸石吸附法联用可以将
海水中氨氮含量降低至较低水平,适宜的滤柱过滤条件为:滤速20L/h ,滤层高度100cm。通过焙烧或NaCl 浸
洗处理能够恢复天然沸石对海水中氨氮的吸附能力,300 ℃焙烧2h 和 1.5mol/L NaCl 溶液浸洗24h 条件下的再生
率分别为99.38%和 122.22%。
关键词:磷酸铵镁;沸石;海水;氨氮;去除效果
中图分类号:X 55 文献标志码:A 文章编号:1000 –6613 (2015 )07 –2060 –05
DOI :10.16085/j.issn.1000-6613.2015.07.042
Ammonia nitrogen removal from seawater by magnesium ammonium
phosphate (MAP ) precipitation combined with zeolite adsorption
WANG Wenhua,ZHANG Xiaoqing ,QIU Jinquan ,SI Xiaoguang ,CHENG Yu ,WANG Jing,
ZHANG Yushan
(Tianjin Institute of Seawater Desalination and Multipurpose Utilization,State Oceanic Administration,
Tianjin 300192,China )
Abstract :The nutrients delivery from land usage and anthropogenic emissions in quantity is the main
reason for euthrophication of coastal seawater in China. Nitrogen (N ) and phosphorus (P ) in seawater
are hard to remove by conventional biological treatments. Due to its high ion exchange capacity and
selectivity,natural zeolite has been one of the most efficient and economical water treatment materials.
This paper studied the dynamic adsorption behavior of ammonium nitrogen from seawater,expressed
as breakthrough curve,using natural zeolite bed filter. The magnesium ammoniu
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