海水小球藻和三角褐指藻对U(Ⅵ)的吸附研究  

Adsorption of uranium U(Ⅵ) by Chlorella and Phaeodactylum tricornutum

作　　者：樊元睿 张炜[1] 陈元涛[1] 覃建娴 FAN Yuan-rui;ZHANG Wei;CHEN Yuan-tao;QIN Jian-xian(College of Chemistry and Chemical Engineering,Qinghai Normal University,Xining 810008,China)

机构地区：[1]青海师范大学化学与化工学院,青海西宁810008

出　　处：《应用化工》2021年第4期900-905,910,共7页Applied Chemical Industry

基　　金：国家自然科学基金(21667024)。

摘　　要：以冷冻干燥法制备海水小球藻和三角褐指藻藻粉,考察pH、时间、温度、初始U(Ⅵ)浓度、盐浓度等对两种微藻在水溶液中吸附U(Ⅵ)的影响,并由Langmuir模型拟合结果分析得出海水小球藻和三角褐指藻对U(Ⅵ)的吸附量最高分别达1314.0 mg/g和1450.0 mg/g。采用BM、SEM、EDS、FTIR等方法对两种微藻吸附U(Ⅵ)前后形貌及结构进行表征,分析可能存在的吸附机理。此外,模拟深海高压环境考察藻粉对U(Ⅵ)的吸附,得出2种藻粉在一定超高压环境下U(Ⅵ)吸附性能良好,且三角褐指藻优于海水小球藻。Chlorella and Phaeodactylum tricornutum powder were prepared by freeze-drying method.The effects of pH,time, temperature, initial uranium concentration of the solution and salt concentration on the adsorption of U(Ⅵ) by two microalgae in aqueous solution were investigated.It was concluded that the adsorption capacity of Chlorella and Phaeodactylum tricornutum powder for U(Ⅵ) can reach 1 314.0,1 450.0 mg/g by the Langmuir model.The morphology and structure of two microalgae before and after adsorption of U(Ⅵ) were observed and characterized by BM,SEM,EDS,FTIR,and analyzed the possible adsorption mechanism.Further, the adsorption of U(Ⅵ) by algal powder under simulated deep-sea high-pressure environment was investigated, and it was concluded that the uranium adsorption performance of two algal powder under certain ultra-high-pressure environment was good, and Phaeodactylum tricornutum was better than Chlorella.

关 键 词：U(Ⅵ)处理 生物吸附剂 超高压 吸附机理 

分 类 号：TQ013[化学工程]