Abstract
In this paper, JBW zeolite prepared from Egyptian kaolin was investigated by means of XRD, IR, SEM, EDX and ion exchange of some heavy metals. Adsorption isotherms were used to investigate the structure and properties of the prepared zeolite. XRD analysis showed that the JBW was a pure crystalline phase with orthorhombic crystal symmetry. Thermal treatment showed that the JBW transformed into the It-Carn phase at 1000°C through an intermediate crystalline alumino silicate phase. SEM images showed that the JBW crystallised in a cylindrical shape. However, spherical agglomerates were observed at lower magnifications. The ion exchange isotherms with Cu2+, Ni2+ and Co2+ were found to follow a Freundlich isotherm. In addition, it shows higher affinity towards Cu2+ than other ions.
JBW zeolite structure was prepared from Egyptian kaolin and characterised. XRD analysis showed that the JBW was a pure crystalline phase with orthorhombic crystal symmetry. Thermal treatment showed that the JBW transformed into the It-Carn phase at 1000°C through an intermediate crystalline alumino silicate phase. [Display omitted]
► Egyptian kaolin was successfully used to prepare pure phase of JBW Structure. ► JBW is stable till <300°C. ► JBW phase crystallizes as cylindrical shape but agglomerates in a Nano spherical shape. ► The ion exchange isotherms of Cu2+, Ni2+, and Co2+ followed up Freundlich isotherm. ► Selectivity towards Cu2+ is much higher than Co2+ or Ni2+.