Modified Phillipsite as a Novel Ion-Exchanger for Potassium Extraction from Seawater
Journal Title: Materials Science-Medžiagotyra - Year 2019, Vol 25, Issue 4
Abstract
Template-free preparation of phillipsite as a novel K+ ion-exchanger was studied systematically by hydrothermal synthesis. The alkalinity, dosage of water glass, dosage of H2O, aging time, reaction temperature and time of hydrothermal synthesis were discussed in detail. The optimized material obtained about phillipsite through the synthesis and testing methods was performed. The K+ ion-exchange capacity and selectivity coefficient were tested. The molar composition for preparing high performance phillipsite obtained was 2K2O:18SiO2:Al2O3:510H2O by optimizing synthetic conditions. The K+ ion-exchange capacity of phillipsite was 57.3 mg/g in seawater. The K+ selectivity coefficient was 88.6 in an equimolar K+ and Na+ mixed solution. Phillipsite can selectively capture K+ over other ions, and therefore can be used for potassium extraction selectively from seawater. Phillipsite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The XRD pattern indicated that the synthetic zeolite was phillipsite. The phillipsite particles exhibited cross-like shape and the average particle size was about 2.5 μm. The synthetic phillipsite was mainly consisted of Si, Al, K and O elements.
Authors and Affiliations
Chunxia MENG, Jinpeng HOU
Tribological Behavior of Cermet Coatings Deposited from Submicron WC-10Co-4Cr Powders Using HVOF Spraying
In this paper, we prepared cermet coatings deposited from submicron WC-CoCr powders using high-velocity oxygen-fuel (HVOF) spraying process. The detailed microstructures, slurry erosion and sliding wear resistance of as-...
Investigation of Abrasive Wear Behavior of Industrial Wastes on Al 6061 Material Using Rubber Wheel Abrasion Test (RWAT) Method
In this study, the abrading characteristics of the slags, generated in the form of industrial waste during raw iron, steel and ferrochromium ore production, are investigated. Granulated blast furnace slag (GBFS), basic o...
The Effect of Cutting Parameters on Tool Wear During the Milling of Carbon Fiber Reinforced Polymer (CFRP) Composites
Reduction of machining times and optimization of cutting parameters and conditions hold great importance in machining processes. Milling is among the most important machining processes used for machining of fiber-reinfor...
Experimental Study on the Thermal Decomposition of Two Nitrocellulose Mixtures in Different Forms
In order to ensure the safety of nitrocellulose (NC) mixtures in storage, transportation and usage, it is necessary to study the thermal stability of NC mixtures. In the present study, the thermal decomposition of two co...
Ag-induced a New Raman Mode in ZnO Microrods
The chemical vapor deposition technique was used to prepare the Ag doped ZnO microrods, which were located on Si substrates at two different positions. The scanning electron microscopy revealed that the samples have a cl...