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针铁矿对焦磷酸根的吸附特征及吸附机制

谢发之 ,  圣丹丹 ,  胡婷婷 ,  李海斌 ,  汪雪春 ,  谢志勇

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引用本文: 谢发之, 圣丹丹, 胡婷婷, 李海斌, 汪雪春, 谢志勇. 针铁矿对焦磷酸根的吸附特征及吸附机制[J]. 应用化学, 2016, 33(3): 343-349. doi: 10.11944/j.issn.1000-0518.2016.03.150243 shu
Citation:  XIE Fazhi, SHENG Dandan, HU Tingting, LI Haibin, WANG Xuechun, XIE Zhiyong. Adsorption Behavior and Mechanism of Pyrophosphate on Goethite[J]. Chinese Journal of Applied Chemistry, 2016, 33(3): 343-349. doi: 10.11944/j.issn.1000-0518.2016.03.150243 shu

针铁矿对焦磷酸根的吸附特征及吸附机制

  • a.

    a. 安徽建筑大学材料与化学工程学院;

  • b.

    b. 安徽建筑大学先进建筑材料安徽省重点实验室 合肥 230022

    • 通讯作者: 谢发之,副教授;Tel:0551-63828063;Fax:0551-63828059;E-mail:fzxie@ahjzu.edu.cn;研究方向:环境功能材料与水污染控制
  • 基金项目:

    国家自然科学基金项目（21107001) 

    2014年安徽省高校优秀青年人才支持计划项目 

摘要: 为深入了解自然水体中焦磷酸盐的迁移转化行为，以表生环境中广泛存在的稳定矿物-针铁矿为研究对象，系统研究了其对焦磷酸根的吸附过程，探索了不同实验条件下（pH值、电解质、时间、温度）针铁矿对焦磷酸根吸附的影响。结果表明，溶液pH值从6.27升至10.99时，总磷吸附量从3.00 mg/g降低至0.75 mg/g；电解质浓度越低越有利于针铁矿对焦磷酸根的吸附；吸附剂对焦磷酸根的吸附量在最初1 h内增长较快，随后渐渐达到吸附平衡；溶液温度的升高对吸附量提高具有增强作用。用动力学和热力学模型对吸附过程进行拟合，发现准二级动力学和Langmuir模型具有更好的适用性。结合材料吸附焦磷酸根前后的表征，推导出针铁矿对焦磷酸根的吸附机制可能是以表面配合和物理吸附为主导。

English

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  • 收稿日期:  2015-07-10
  • 网络出版日期:  2015-09-11
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