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›› 2010, Vol. 10 ›› Issue (1): 75-79.

• 反应与分离 • 上一篇    下一篇

钢渣对废水中磷的吸附行为

化全县 李见云 汤建伟 张宝林 黄莺 黄莺   

  1. 郑州大学化工与能源学院，国家钙镁磷复合肥技术研究推广中心 郑州航空工业管理学院土木建筑工程学院 郑州大学化工与能源学院，国家钙镁磷复合肥技术研究推广中心 郑州大学化工与能源学院，国家钙镁磷复合肥技术研究推广中心 郑州大学化工与能源学院，国家钙镁磷复合肥技术研究推广中心
  • 收稿日期:2009-07-20 修回日期:2009-10-12 出版日期:2010-02-20 发布日期:2010-02-20
  • 通讯作者: 化全县

Adsorption of Phosphate in Waste Water with Steel Slag

HUA Quan-xian TANG Jian-wei LIU Yong， ZHANG Bao-lin WEI Hui， HUANG Ying，   

  1. School of Chemical and Energy Engineering, National Centre of Research & Popularization on Calcium, Magnesium, Phosphate and Compound Fertilizer Technology, Zhengzhou University School of Civil Engineering, Zhengzhou Institute of Aeronautical Industry Management School of Chemical and Energy Engineering, National Centre of Research & Popularization on Calcium, Magnesium, Phosphate and Compound Fertilizer Technology, Zhengzhou University School of Chemical and Energy Engineering, National Centre of Research & Popularization on Calcium, Magnesium, Phosphate and Compound Fertilizer Technology, Zhengzhou University School of Chemical and Energy Engineering, National Centre of Research & Popularization on Calcium, Magnesium, Phosphate and Compound Fertilizer Technology, Zhengzhou University
  • Received:2009-07-20 Revised:2009-10-12 Online:2010-02-20 Published:2010-02-20
  • Contact: HUA Quan-xian

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摘要： 通过批次振荡实验研究了钢渣吸附磷的特性. 结果表明，钢渣对磷的吸附过程符合Langmuir和Freundlich方程，理论饱和吸附量为0.33 g/kg，为优惠型吸附. 吸附动力学过程符合Lagergren准二级动力学方程，平衡吸附量随温度升高而增加，吸附速率主控步骤为液膜扩散和颗粒内扩散同时存在. 吸附热力学参数DH>0, DG<0, DS>0，钢渣对磷的吸附为吸热、自发的物理吸附过程，升高温度有利于吸附进行.

关键词: 钢渣, 磷, 吸附, 优惠型吸附, 准二级动力学方程

Abstract: The oscillation experiments were carried out to study the characteristics behavior of phosphate adsorption on steel slag. The results showed that isothermal adsorption data fitted to both Langmuir and Freundlich equations and the adsorption was preferential type. The theoretical saturated capacity was 0.33 g/kg. Phosphate adsorption kinetics fitted to pseudo-second order Lagergren equation. Equilibrium adsorption amount increased with raising reaction temperature. The adsorption rate was governed by both liquid film diffusion and intra-particle diffusion. Thermodynamics parameters of phosphate adsorption were DH>0, DG<0, and DS>0, which indicated that the adsorption behavior was endothermic, spontaneous and physical process, and temperature elevation promoted adsorption.

Key words: steel slag, phosphate, adsorption, preferential adsorption, pseudo-second order kinetics equation

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