颗粒态铁锰复合氧化物对磷的吸附特征及影响因素

doi:10.16085/j.issn.1000-6613.2017.06.049

化工进展 ›› 2017, Vol. 36 ›› Issue (06): 2311-2317.DOI: 10.16085/j.issn.1000-6613.2017.06.049

颗粒态铁锰复合氧化物对磷的吸附特征及影响因素

韩强^1,2,3, 杜晓丽^1,2,3, 崔申申¹, 胡婉蓉¹

1 北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室, 北京 100044;
2 北京未来城市设计高精尖创新中心, 北京 100044;
3 北京建筑大学北京市可持续城市排水系统构建与风险控制工程技术研究中心, 北京 100044

收稿日期:2016-11-02 修回日期:2017-01-20 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: 杜晓丽
作者简介:韩强(1990—),男,硕士研究生,研究方向为城市水环境科学与系统工程。
基金资助:
北京市自然科学基金（8162016）、国家自然科学基金（51308032）及北京市优秀人才培养—青年拔尖团队项目（2015000026833T0000）。

Adsorptive characteristics and effect parameters of granular Fe-Mn binary oxide for phosphate

HAN Qiang^1,2,3, DU Xiaoli^1,2,3, CUI Shenshen¹, HU Wanrong¹

1 Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2 Beijing Advanced Innovation Center for Future Urban Design, Beijing 100044, China;
3 Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

Received:2016-11-02 Revised:2017-01-20 Online:2017-06-05 Published:2017-06-05

摘要/Abstract

摘要： 以聚乙烯醇（PVA）为黏合剂，将FeSO₄和KMnO₄以摩尔比5∶1复合制备了颗粒态铁锰复合氧化物，采用扫描电镜和红外光谱对其进行表征，并考察了其对溶液中磷的吸附特征及影响因素。结果表明，颗粒态铁锰复合氧化物表面粗糙、孔隙结构发达，含有丰富的表面基团；颗粒态铁锰复合氧化物对水中的磷具有良好的吸附效果，对磷的吸附量随时间增加而增大，400min时可达吸附平衡，准二级动力学方程能较好地描述该吸附动力学过程；Langmuir方程可较好地拟合不同温度时的等温吸附数据，且反应温度越高，平衡吸附量越大；离子强度变化及NO₃^-、SiO₃^2-、SO₄^2-和CO₃^2-等共存离子存在对颗粒态铁锰复合氧化物的吸附除磷过程影响不大； pH可显著影响颗粒态铁锰复合氧化物对磷的去除效果，pH≤5时磷的去除率较高且基本保持不变，pH> 5时去除率随pH升高而降低。

关键词: 颗粒物料, 铁锰复合氧化物, 吸附, 反应动力学, 除磷

Abstract: With polyvinyl alcohol(PVA)as adhesive,a granular Fe-Mn binary oxide(GFMO) was synthesized with FeSO₄/KMnO₄ molar ratio of 5:1. GFMO was characterized by scanning electron microscope(SEM)and Fourier transform infrared spectrometer(FTIR)and its adsorption behavior for phosphate and effect parameters were investigated. The results showed that GFMO exhibits a rough surface and a porous structure with abundant surface hydroxyl groups. GFMO has a favorable adsorption properties for phosphate in water. Phosphate adsorption amounts increase with the contact time increasing. The adsorption equilibrium time is achieved at 400min. The adsorption kinetics can be described by pseudo-second-order kinetic model. The Langmuir isotherm model can suitably fit the isotherm adsorption data at different temperatures. Higher temperatures yield larger equilibrium adsorption amounts. Ionic strength and other anions such as NO₃^-,SiO₃^2-,SO₄^2-and CO₃^2-have no obvious influence on the phosphate removal process by GFMO. However,pH can strongly influence the phosphate adsorption process. A better phosphate removal efficiency was obtained when pH was below 5,while the phosphate removal efficiency decreased with the increase of pH when pH was above 5.

Key words: granular materials, Fe-Mn binary oxide, adsorption, reaction kinetics, phosphate removal

中图分类号:

X703.1

韩强, 杜晓丽, 崔申申, 胡婉蓉. 颗粒态铁锰复合氧化物对磷的吸附特征及影响因素[J]. 化工进展, 2017, 36(06): 2311-2317.

HAN Qiang, DU Xiaoli, CUI Shenshen, HU Wanrong. Adsorptive characteristics and effect parameters of granular Fe-Mn binary oxide for phosphate[J]. Chemical Industry and Engineering Progress, 2017, 36(06): 2311-2317.

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颗粒态铁锰复合氧化物对磷的吸附特征及影响因素

Adsorptive characteristics and effect parameters of granular Fe-Mn binary oxide for phosphate

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