No abstract

No abstract

No abstract

A solid phase extraction method for separation and enrichment of uranium(VI) was developed using Penicillium chrysogenum immobilized on silica mixed with double distilled water. Conditions such as pH, sample flow rate and volume, eluting solution and interfering ions with uranium(VI) optimized and determined spectrophotometrically for quantitative sorbtion. Maximum adsorption found at monolayer was 1.3004 mg/g using Langmuir isotherm. The limits of detection (LOD) and limit of quantification (LOQ) of the proposed method for uranium(VI) was 0.61 lg/L and was 2.02 lg/L respectively. The method developed for the separation and recovery of uranium(VI) was applied sediment samples and tap water samples.

Simple and eco-friendly biosynthesis approach was developed to synthesize silver nanoparticles (SNPs) and gold nanoparticles (GNPs) using Ficus racemosa latex as reducing agent. The presence of sunlight is utilized with latex and achieved the nanoparticles whose average size was in the range of 50-120 nm for SNPs and 20-50 nm for GNPs. The synthesized nanoparticles were characterized by UV/Visible absorption spectroscopy, X-ray diffraction, and field emission-scanning electron microscopy techniques toget understand the obtained nanoparticles. The pH-dependent binding studies of SNPs and GNPs with four amino acids, namely L-lysine, L-arginine, L-glutamine and glycin have been reported.