Efficient adsorption of cesium cations and chromate anions by one-step process using surfactant-modified zeolite.

Natural zeolite is organically modified with the surfactant cetyltrimethylammonium bromide (CTAB) and employed as a dual-function material for simultaneous adsorption of Cs cations and HCrO anions from aqueous solutions. Unmodified and modified zeolites are characterized by Fourier transform infrared (FTIR), dynamic light scattering (DLS), nitrogen adsorption-desorption isotherms, and X-ray diffraction (XRD). The results showed that CTAB-zeolite had the efficiency to simultaneously adsorb the concerned species in the pH range 2.

Hydroxyapatite/NiFeO superparamagnetic composite: Facile synthesis and adsorption of rare elements.

A magnetic hydroxyapatite composite (CaHAP/NF) derived from calcium hydroxyapatite [Ca(PO)(OH)] and nickel ferrite [NiFeO] was successfully synthesized by a coprecipitation method. The synthesized composite was characterized using Fourier transform infrared spectroscopy (FT-IR), X-Ray diffractometer (XRD), thermogravimetric differential thermal analysis (TG-DTA), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). Results clarify that the composite is a crystalline in nature, thermally stable up to 800 °C and possesses a high porous structure.