水铁矿负载甘蔗渣吸附磷酸根开放性综合化学实验  

A Comprehensive Chemistry Experiment on the Adsorption of Phosphate by Ferrihydrite Loaded Sugarcane Bagasse

作　　者：余军霞 周如意 池汝安[1] Junxia Yu;Ruyi Zhou;Ruan Chi(Key Laboratory for Green Chemical Process of Ministry of Education,School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430073,China;School of Biological Engineering,Wuhan Polytechnic,Wuhan 430074,China)

机构地区：[1]武汉工程大学化学与环境工程学院,绿色化工过程教育部重点实验室,武汉430073 [2]武汉职业技术学院生物工程学院,武汉430074

出　　处：《大学化学》2021年第6期91-97,共7页University Chemistry

基　　金：国家自然科学基金面上项目(21978226);湖北省教育厅创新团队项目(T201506)。

摘　　要：采用原位沉淀法制备了对磷酸根有较好吸附性能的水铁矿负载甘蔗渣复合吸附剂。通过扫描电镜-X射线能谱仪(SEM-EDS)、X射线衍射光谱(XRD)、傅里叶变换红外光谱(FTIR)、Zeta电位等手段对负载甘蔗渣吸附剂进行了表征,同时考查了水铁矿负载甘蔗渣吸附剂对磷酸根吸附的行为和机理。结果表明负载后的甘蔗渣对磷酸根的吸附量提高显著,吸附可在30 min内达到平衡,等温吸附线符合Langmuir模型,动力学曲线符合准二级模型,负载吸附剂对废水中磷的去除率高达99.8%。该研究可作为工业分析、应用化学、环境工程等专业高年级的综合化学实验,有利于提升学生的研究兴趣,培养学生将理论知识运用于实际的能力,激发学生的创新能力。Ferrihydrite loaded sugarcane bagasse composite adsorbent with good adsorption performances for phosphate was prepared by in situ precipitation.The adsorbent was characterized by field emission scanning electron microscopy and energy dispersive X-ray spectroscopy(SEM-EDS),Fourier transform infrared spectroscopy(FTIR),X-ray diffraction spectroscopy(XRD)and Zeta potential.Adsorption behavior and mechanism of phosphate on the composite adsorbent were investigated.Results showed that the adsorption capacity of bagasse increased significantly after loaded with ferrihydrite,and equilibrium reached within 30 min.Adsorption isotherm and kinetics of phosphate on the composite adsorbents could be predicted well by the Langmuir and pseudo-second-order model,respectively.Practical waste water treatment showed that 99.8%of phosphate could be removed from aqueous solution.This research content could be used as a comprehensive experiment for industrial analysis,applied chemistry and environmental engineering majors.It could improve students’study interesting,develop their capability to apply knowledge,and stimulate their innovation ability.

关 键 词：综合化学实验 甘蔗渣 负载 水铁矿 吸附 磷酸根 

分 类 号：G642.423[文化科学—高等教育学] O6[文化科学—教育学]