Cadmium is a chemical element with symbol Cd and atomic number 48.

Preparation Cadmium nitrate is prepared by dissolving cadmium metal or its oxide, hydroxide, or carbonate, in nitric acid followed by crystallization CdO 2HNO3 Cd(NO3)2 H2O CdCO3 2 HNO3 Cd(NO3)2 CO2 H2O Cd 4 HNO3 2 NO2 2 H2O Cd(NO3)2 Reactions Thermal dissociation at elevated temperatures produces cadmium oxide and oxides of nitrogen.

In view of the recent exposure of rice containing excessive levels of cadmium, rice pollution has become the focus of attention for the whole country.

They used two tanks with a total of about 200 liters of water with about 40 kg of dissolved CdCl2.

The Guangzhou Food and Drug Administration revealed on May 16 that eight out of 18 rice samples tested in local markets contained excessive levels of cadmium.

According to Global Times, a Nanjing Agricultural University research project in 2011 found that around 10 percent of rice sold across the nation contained excessive amounts of cadmium.

The reasons for less than satisfactory quality of food were the increased levels of pesticides or heavy metals cadmium, lead and arsenic, while at the same time, the declarations on the original packing of the food were incomplete or non harmonized.

Rice contaminated with high levels of the toxic heavy metal cadmium, dubbed cadmium rice, is the latest food scandal in China to trigger public panic and anger among the country's consumers.

To stop the contamination from spreading, the local fire department had to add significant quantities of dissolved aluminum chloride, which binds to cadmium and settles on the river bottom. The toxic sediment will eventually be dredged.

The reason for poor quality has been overly high pesticide and heavy metals quantities cadmium, lead and arsenic, coupled with incomplete and unharmonized declarations on the original packing of food.

Cadmium in rice usually comes from the soil where it grows, and the soil was polluted by mining and chemical wastes, Fan Zhihong, a food safety expert at China Agricultural University in Beijing, told the state run Global Times.