MnCoFeO and encapsulated MnCoFeO/SiO magnetic nanoparticles for efficient Pb removal from aqueous solution.

Sol-gel auto-combustion technique was used to synthesize spinel ferrite nanoparticles of MnCoFeO (MCF). Using the modified Stöber method, these magnetic nanoparticles were encapsulated with silica to form the core/shell MnCoFeO/SiO (MCFS). The phase composition, morphology, particle size, and saturation magnetization of the encapsulated nanoparticles were studied using X-ray diffraction (XRD), high resolution-transition electron microscopy (HR-TEM), and vibrating sample magnetometer (VSM).

Adsorption of Methylene Blue and Pb by using acid-activated Posidonia oceanica waste.

Dead leaves of seagrass Posidonia oceanica were activated by using one mol L acetic acid and used as an eco-adsorbent for the removal of methylene blue (MB) and Pb from aqueous solutions. The seagrass was characterized by chemical and physical measurements that confirmed the acid-activation of seagrass. The favourable conditions for MB and Pb adsorption onto the activated seagrass (SG) were determined to be a pH range of 2-12 and ≥6, an adsorbent dosage of 3.

Polymeric nanofibers for the removal of Cr(III) from tannery waste water.

We demonstrate the use of cysteine-modified polymer nanofibers for the rapid and efficient removal of Cr(III) from real tannery waste water samples. Various parameters such as pH, load of nanofibers and time of exposure were optimized to achieve maximum removal. The optimum parameters were found to be 0.