东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (5): 730-733.DOI: -

• 论著 • 上一篇    下一篇

人工湿地基质净化磷素的吸附剂性能

李晓东;李海波;马铮铮;孙铁珩;   

  1. 东北大学资源与土木工程学院;沈阳大学沈阳环境工程重点实验室;东北大学资源与土木工程学院;东北大学资源与土木工程学院 辽宁沈阳110004;辽宁沈阳110044;辽宁沈阳110004;辽宁沈阳110004;沈阳大学沈阳环境工程重点实验室;辽宁沈阳110044;中国科学院沈阳应用生态研究所;辽宁沈阳110016
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-05-15 发布日期:2013-06-22
  • 通讯作者: Li, X.-D.
  • 作者简介:-
  • 基金资助:
    辽宁省教育厅青年基金资助项目(2005264);;

On the adsorbent performance for phosphorus removal from substrate of constructed wetland

Li, Xiao-Dong (1); Li, Hai-Bo (2); Ma, Zheng-Zheng (1); Sun, Tie-Heng (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) Key Laboratory of Environment Engineering, Shenyang University, Shenyang 110044, China; (3) Institute of Applied Ecology, Chinese Acad. of Sci., Shenyang 110016, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-05-15 Published:2013-06-22
  • Contact: Li, X.-D.
  • About author:-
  • Supported by:
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摘要： 通过基质磷素等温吸附实验,研究了砂子、水淬渣、钢渣3种人工湿地基质净化磷素的效果.结果表明:Freundlich和Langmuir等温吸附曲线方程均能较好地描述上述基质磷素吸附的过程,其磷素理论饱和吸附量依次为钢渣12 500 mg.kg-1,水淬渣3 333 mg.kg-1,砂子270 mg.kg-1.基质吸附饱和后,磷素解吸实验表明:水淬渣磷素解吸率最低,为0.68%;砂子的解吸率最高,为7.59%.虽然钢渣的吸附量最大,但其水溶液pH显强碱性,不适合湿地植物的生长;水淬渣作为一种工业废料,磷素吸附量为砂子的12倍左右,解吸率为砂子的1/10,而且对植物生长无明显危害,是一种比较有应用前景...

关键词: 人工湿地, 基质, 磷素吸附, 磷素解吸, 水淬渣

Abstract: The effects of sand, tapping slag and WGS(water granulated slag) used as adsorbents on phosphorus removal from the substrate of constructed wetland(CW) were investigated isothermally through adsorption tests, as well as their adsorbilities. The results showed that the isothermal adsorption process can be represented well by both the Freundlich and Langmuir equations. Theoretically the saturated adsorbilities for phosphorus removal of sand, tapping slag and WGS are 270, 12500 and 3333 mg·kg-1, respectively. After the substrate has been saturated through such adsorption, the results of desorption test of phosphorus showed that the desorbility of WGS is 0.68%, i.e. the lowest, while that of sand is the highest, i.e. 7.59%. As to the tapping slag, its adsorbility is the highest but its solution presents high pH value or high alkalinity and hence inadaptable to the growth of mire plants. As an industrial waste, WGS's adsorbility is about 12 times as high as sand and its desorbility is just 1/10 of sand, especially WGS has no obvious hazard to the growth of plants. So, comparatively, WGS has good prospects for phosphorus removal from CW.

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