多孔不锈钢基氧化铝膜去除水溶液中的Cr(Ⅵ)和Cd(Ⅱ)  

Removal of chromium (Cr(Ⅵ) ) and cadmium (Cd(Ⅱ)) by 316L porous stainless steel coated with alumina film

作　　者：李易轩 李忠宏[1] 陈秀梅[1] 张文刚[1] 雒雪丽 赵凡 朱力 LI Yixuan LI Zhonghong CHEN Xiumei ZHANG Wengang LUO Xueli ZHAO Fan ZHU Li(College of Food Science and Engineering, Northwest A＆F University, Yangling 712100)

机构地区：[1]西北农林科技大学食品科学与工程学院,杨凌712100

出　　处：《环境科学学报》2017年第10期3729-3734,共6页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.31371813)~~

摘　　要：通过悬浮粒子浸涂法将合成的γ-Al_2O_3纳米粒子固载于316L多孔不锈钢表面以吸附水溶液中的Cr(Ⅵ)和Cd(Ⅱ).扫描电镜(SEM)和X射线衍射(XRD)测试结果表明,γ相的Al_2O_3纳米粒子均匀地涂在了316L多孔不锈钢基体上,膜体表面沉积厚度约为20μm.该膜对单一Cr(Ⅵ)和Cd(Ⅱ)吸附的最佳pH分别为3.0~4.0和8.0~9.0,吸附均符合动力学准二级模型和Langmuir吸附等温模型,最大吸附量分别为0.603mg·g^(-1)和0.399 mg·g^(-1).本研究可为水体中的高毒性重金属Cr(Ⅵ)和Cd(Ⅱ)去除提供一定的理论和技术参考.γ-Al2O3 nanoparticles were immobilized onto 316 L porous stainless steel（ PSS） tube for removal of chromium（ Cd（ Ⅵ）） and cadmium（ Cd（ Ⅱ）） in aqueous solution. Scanning electron microscope（ SEM） and X-ray diffraction（ XRD） analysis results revealed that γ-Al2O3 nanoparticles have uniformly coated on 316 L PSS with a thickness of - 20 μm. Optimium pH for the adsorption of Cr（ Ⅵ） and Cd（ Ⅱ） were 3.0 - 4.0 and 8. 0 - 9. 0respectively. The adsorption data was well fitted by pseudo-second-order model and Langmuir adsorption isotherm model,and the calculated maximum adsorption capacity for Cr（ Ⅵ） and Cd（ Ⅱ） was respectively 0.603 mg·g^-1 and 0.399 mg·g^-1. This study may provide theoretical and technical reference for removal of highly toxic heavy metals Cr（ Ⅵ） and Cd（ Ⅱ） from water.

关 键 词：氧化铝 重金属 吸附 膜分离 悬浮粒子浸涂 

分 类 号：X703[环境科学与工程—环境工程]