改性秸秆纤维素在水处理中除磷的研究  

Phosphorus Absorption Behaviors on Modified Straw Cellulose in Aqueous Solution

作　　者：吴文清 黄少斌[2,1,3] 张瑞峰[2,1] 祝光富 

机构地区：[1]污染控制与生态修复广东省普通高等学校重点实验室,广东广州510006 [2]华南理工大学环境科学与工程学院,广东广州510006 [3]工业聚集区污染控制与生态修复教育部重点实验室,广东广州510006 [4]广东上九生物降解塑料有限公司,广东东莞523128

出　　处：《造纸科学与技术》2012年第5期80-86,共7页Paper Science & Technology

基　　金：国家自然科学基金(项目编号20777019);广东省科技厅(项目编号2011B010100029);广东省经济和信息化委员会(项目编号20100106-3);广东省教育部产学研结合项目(项目编号2011B090400284)专项资金资助项目

摘　　要：对小麦秸秆进行物理-化学方法改性后,制备成一种新型的吸附剂用于处理水溶液中的磷酸根离子。通过扫描电子显微镜(SEM)、傅里叶红外光谱仪(FT-IR)和热重分析仪(TG)对秸秆进行了表征,并对磷的吸附与解吸再生特征进行研究。结果表明,秸秆的燃烧过程受金属离子效应影响,秸秆独特的表面与内部结构有利于磷的吸附,经过超声波协助碱液预处理后能大大提高纤维素的可及度。动力学与热力学实验表明颗粒内扩散不是磷吸附过程的唯一控制速率,并且磷的吸附过程属于化学吸附。解吸再生实验表明改性秸秆可循环利用。The adsorption of phosphate from aqueous solutions onto physical-chemical modified wheat straw was studied. The structures were characterized by scanning electron microscopy（SEM） , infrared spectrometer（FTIR） and thermal gravimetric analysis （TG） ,and the behaviors of adsorption and desorption were also discussed. In the characterization analysis of five different modified wheat straw, combustion process was influenced by metal ion effect. The unique structure of wheat straw played an important on the adsorption of phosphate and after ultrasoundalkali pretreatment, the ability of cellulose to combine with the reagents was improved. The study also showed that the control rate of particle diffusion was not the only way and the adsorption process was affected by chemical factor mainly. The desorption studies showed that the modified wheat straw can be recycled.

关 键 词：小麦秸秆 纤维素 磷酸根 吸附再生 

分 类 号：X703[环境科学与工程—环境工程]