METALS, New system for detecting heavy metals in agricultural soils
New system for detecting heavy metals in agricultural soils
has been developed and applied by English Mediterranean areas
Heavy metals are part of the ground, but in an amount which is not toxic nor wildlife or for livestock or to humans. However, the polluting activities and bad land management are causing the presence of these chemicals increase, with the consequent risk to health. A new multivariate analysis method developed by the Desertification Research Center of the University of Valencia, has shown the amount and origin of certain heavy metals in agricultural soils deposited by the hand of man. The data will generate a standard of quality of agricultural land. For Yaiza Martínez.
Measurement of quantities
These pollutants are filtered out easily in water or are absorbed by certain crops, which affects the health of both wildlife and livestock and human. To protect the soil, it is therefore essential to know their types, with organic content, and the compounds and salts such as carbonates, which form it. Thus, one can measure the risk and protective policies more effective.
English scientists Carolina Mico, Luis Recatala, Mónica Peris and Juan Sanchez, Research Centre on Desertification (CIDE, University of Valencia, Consejo Superior de Investigaciones Científicas (CSIC and the Generalitat Valenciana, have devised and implemented a multivariable analysis (primary analysis of incorporation and analysis in a group) the study of soils agricultural, with the aim of identifying common source of heavy metal contaminants.
The research results were published in Chemosphere and the magazine have been devoted Atomic Spectroscoy review. As explained in this regard, it took 54 Soil samples from the region of Alicante, which was taken as a typical Mediterranean region. These Samples were subjected to a microwave metabolism in acid solution and metal content (cadmium, cobalt, chromium, copper, iron, manganese, nickel, lead and zinc) were determined by atomic absorption spectroscopy, a method that uses a nebulizer and a flame, whose light is absorbed by the element, which determines the amount of it present in the samples.
Clear results
The results were similar to those of other tests carried out in other Mediterranean areas, except in the amount content of copper and lead. But it was the chemical computer analysis which provided important clues as the source of metal contaminants.
According to them, cobalt, chromium, iron, manganese and zinc are associated with source rocks, forming part of the soil properties. However, changing land use means that these metals are "move" more than it would move under normal conditions.
But the problem would be in the cadmium, copper and lead were present in the samples as a result of industrial, urban and agricultural. This is what is called the "anthropogenic component" in this case the soil, caused by human action. The concern is found in agricultural soils.
These results point to the need to establish quality standard for the presence of heavy metals, providing that soils are affected by human pollution. Analyses of other regions will allow scientists to improve the bases that are defining those standards on a regional level under the auspices of the European Strategy for Soil Protection European Commission, who since 2004 is conducting a soil protection strategy.
Name: Yenny Zoraida Morales Zambrano
Subject: RF Circuits
View blog: http://crfzoraida.blogspot.com/
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