title: Microporous nano-MgO/diatomite ceramic membrane with high positive surface charge for tetracycline removal.
abstract: A novel microporous nano-MgO/diatomite ceramic membrane with high positive surface charge was prepared, including synthesis of precursor colloid, dip-coating and thermal decomposition. Combined SEM, EDS, XRD and XPS studies show the nano-MgO is irregularly distributed on the membrane surface or pore walls and forms a positively charged nano coating. And the nano-MgO coating is firmly attached to the diatomite membrane via SiO chemical bond. Thus the nano-MgO/diatomite membrane behaves strong electropositivity with the isoelectric point of 10.8. Preliminary filtration tests indicate that the as-prepared nano-MgO/diatomite membrane could remove approximately 99.7% of tetracycline in water through electrostatic adsorption effect. The desirable electrostatic property enables the nano-MgO/diatomite membrane to be a candidate for removal of organic pollutants from water. And it is convinced that there will be a great application prospect of charged ceramic membrane in water treatment field.
authors: College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China; Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China.
authors: Xian
authors: X
authors: Meng
authors: Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China.
authors: Zhimeng
authors: Z
authors: Liu
authors: Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China. Electronic address: dcnudt@163.com.
authors: Cheng
authors: C
authors: Deng
authors: Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China. Electronic address: zmf323@163.com.
authors: Mengfu
authors: M
authors: Zhu
authors: State Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, Beijing 100191, China.
authors: Deyin
authors: D
authors: Wang
authors: College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China; Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China.
authors: Kui
authors: K
authors: Li
authors: College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China.
authors: Yu
authors: Y
authors: Deng
authors: Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China.
authors: Mingming
authors: M
authors: Jiang
mesh_terms: D000327:Adsorption; D007692:Diatomaceous Earth / Q000737:chemistry*; D005374:Filtration; D008277:Magnesium Oxide / Q000737:chemistry*; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry*; D055672:Static Electricity; D013752:Tetracycline / Q000302:isolation & purification*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; D008277:Magnesium Oxide; D007692:Diatomaceous Earth; C033787:diatomite; D013752:Tetracycline
keywords: Electrostatic adsorption; Nano-MgO; Positively charged ceramic membrane; Tetracycline; Water treatment