Cadmium (Cd) is a rare and precious metals it has no biological function essential but toxic for animals and VAT.Tuy course, residual forms of cadmium in the environment are often caught without causing acute toxicity.
Cd exists in many forms as there are in tobacco smoke, food, body, ... and cause a variety of diseases such as acute liver toxicity and chronic, blood poisoning, chronic bone infection in immune system, bone toxicity, .. Cd born from many avenues as produce from the earth, from fertilizer, deposition from dust, sludge from sewage, due to mining activities metals , industrial waste and various sources. Activation of cadmium in the soil is very important, this process clearly define the impact of metals in the soil in the form of ions exist more elemental form as Cd concentration in the soil environment, Ph factors ,. . From the results of the study showed that the impact is very high Cd in soil, as some rice-growing areas in the Southwest sect HCMC (Nha be and Binh Chanh).
the handling and cleaning hard soil Cd difficult and costly. Therefore, measures should be taken to prevent from scratch.
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