改性膨润土的制备及其对沉积物磷的吸附性能研究  

Preparation of modificated bentonite particle and its adsorption characterization of phosphorus in sediment

作　　者：刘子森[1,2] 张义[1] 刘碧云[1] 贺锋[1] 吴振斌[1] 

机构地区：[1]中国科学院水生生物研究所淡水生态和生物技术国家重点实验室,武汉430072 [2]中国科学院大学,北京100049

出　　处：《化工新型材料》2017年第4期213-215,218,共4页New Chemical Materials

基　　金：湖北省自然科学基金青年基金(2014CFB282);"十二五"国家科技支撑计划课题(2012BAJ21B03-04);国家"十二五"水专项(2012ZX07101007-005)

摘　　要：通过盐酸、碳酸钠、高温焙烧及复合改性等多种方法对膨润土颗粒进行改性,并借助扫描电子显微镜、傅里叶红外光谱仪以及转靶X射线衍射仪等仪器对其进行表征,探讨最合适改性方法,研究改性膨润土对富营养化浅水湖泊沉积物各形态磷的吸附性能和机理。结果表明:10%碳酸钠改性+450℃高温焙烧复合改性为最合适改性方法,对沉积物总磷的去除率为29.76%;阴离子配位交换吸附可能是改性膨润土吸附沉积物磷的主要途径。改性膨润土对湖泊沉积物磷具有较好的吸附效果,是一种可原位处理湖泊富营养化内源磷负荷的高效、经济型新材料。Modified bentonite particles were prepared through various methods such as HCl,Na2CO3,450℃calcination and compound modification.The modified bentonite particles were characterized by SEM,FT-IR and XRD to discuss the optimal modification method and investigated the adsorption mechanism of phosphorus（P）in sediment from shallow eutrophic lake.The results showed that the compound modification method（10% Na2CO3＋450℃ calcination compound modification）was the best method,and the adsorption rate of sediment toal phosphorus（TP）was 29.76%.Anionic coordinate adsorption might play a major role in the adsorption of TP in sediment with the particles.The particles were proved to be satisfied in the adsorption of phosphorus and could act as an efficient and economical kind of new materials to control internal phosphorus loading in eutrophic lakes.

关 键 词：湖泊富营养化 沉积物磷 膨润土 改性 吸附 

分 类 号：X524[环境科学与工程—环境工程]