Heavy metals are naturally occurring elements that have a high atomic weight and a density at least 5 times greater than that of water. Their multiple industrial, domestic, agricultural, medical and technological applications have led to their wide distribution in the environment; raising concerns over their potential effects on human health and the environment. Their toxicity depends on several factors including the dose, route of exposure, and chemical species, as well as the age, gender, genetics, and nutritional status of exposed individuals. Because of their high degree of toxicity, arsenic, cadmium, tin, chromium, lead, and mercury rank among the priority metals that are of public health significance. These metallic elements are considered systemic toxicants that are known to induce multiple organ damage, even at lower levels of exposure. They are also classified as human carcinogens (known or probable) according to the U.S. Environmental Protection Agency, and the International Agency for Research on Cancer. The concentrations of the heavy metals in natural samples are known as very low. Instrumental techniques are required futher preconcentration techniques to determine their concenterations. From this perspective, Geobacillus galactosidasius sp. nov immobilized on Amberlite XAD-4 will prepared as an adsorbent for the preconcentration of Hg and Sn. SEM-EDX will employed for investigation of surface functionality and morphology. The optimization of the preconcentration system will achieved by detailed investigations on experimental parameters such as pH of solution, flow rate, interferic ions, and volume of sample solution. Concentrations of Hg and Sn in different food samples willdetermined by ICP-OES after developed method was applied.
SCIENTIFIC RESEARCH COOPERATION PROTOCOL BETWEEN SIIRT UNIVERSITY (SCIENCE FACULTY- DEPARTMENT OF BIOLOGY), MARDIN ARTUKLU UNIVERSITY (VOCATIONAL HIGHER SCHOOL OF HEALTHCARE STUDIES-MEDICAL LAB. TECH. PROGRAM) and NATIONAL RESEARCH COUNCIL OF ITALY (C.N.R.), INSTITUTE OF BIOMOLECULAR CHEMISTRY
Annarita Poli;Barbara Nicolaus
2016
Abstract
Heavy metals are naturally occurring elements that have a high atomic weight and a density at least 5 times greater than that of water. Their multiple industrial, domestic, agricultural, medical and technological applications have led to their wide distribution in the environment; raising concerns over their potential effects on human health and the environment. Their toxicity depends on several factors including the dose, route of exposure, and chemical species, as well as the age, gender, genetics, and nutritional status of exposed individuals. Because of their high degree of toxicity, arsenic, cadmium, tin, chromium, lead, and mercury rank among the priority metals that are of public health significance. These metallic elements are considered systemic toxicants that are known to induce multiple organ damage, even at lower levels of exposure. They are also classified as human carcinogens (known or probable) according to the U.S. Environmental Protection Agency, and the International Agency for Research on Cancer. The concentrations of the heavy metals in natural samples are known as very low. Instrumental techniques are required futher preconcentration techniques to determine their concenterations. From this perspective, Geobacillus galactosidasius sp. nov immobilized on Amberlite XAD-4 will prepared as an adsorbent for the preconcentration of Hg and Sn. SEM-EDX will employed for investigation of surface functionality and morphology. The optimization of the preconcentration system will achieved by detailed investigations on experimental parameters such as pH of solution, flow rate, interferic ions, and volume of sample solution. Concentrations of Hg and Sn in different food samples willdetermined by ICP-OES after developed method was applied.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
