Spectrophotometric Detection of Mercury inside the Soil Samples of Soran Area
This research is reported on the green synthesis of Ag nanoparticles through an environmental and economical method using aqueous extract of the roots of Euphorbia condylocarpa without any stabilizer or surfactant agents and its application as a biosensor for detecting the mercury inside the soil samples of Soran city. The Ag NPs characterized by X-ray diffraction analysis (XRD) and UV-vis spectroscopy. The reaction between biologically green synthesized silver nanoparticles (Ag NPs) and mercury (II) ions was introduced as a new and high potential colorimetric sensor for the specified recognition and monitoring of mercuric ions in soil samples of Soth parts of Soran city from Iraqi Kurdistan. The fresh biologically synthesized nanobiosensor is brown in color due to the intense SPR absorption band around 430 to 450 nm. In the presence of Hg2+, the brown Ag NPs solution was clearly changed, accompanying the removing the specified surface Plasmon resonance band of nanobiosensor. The analyses results show that soil of study area mostly is contaminated by Mercury and according to geological setting of study area probable source of Hg could be due to anthropogenic sources such as traffic and industrial activity.
Keywords - Euphorbia condylocarpa; green Ag nanobiosensor; Soran city; Soil samples, Surface Plasmon Resonance, Mercury detection