![]() ![]() Fe was added to induce different amounts of iron plaque, and Cd to simulate Cd-polluted soils. Two seedlings were transplanted in a nylon bag containing no substrate but surrounded by soil amended with Fe and Cd combined at rates of 0, 1, or 2 g Fe kg(- 1) and 0, 2.0, or 10 mg Cd kg(- 1) soil. Rice seedlings were pre-cultivated in solution culture for 16 days. A pot experiment was conducted to investigate the influence of iron plaque in Cd uptake and accumulation by rice seedlings in soil. However, little is known about the role of iron plaque in Cd movement from soil to the plant aboveground parts. Iron plaque is ubiquitously formed on the root surfaces of rice. Liu, Houjun Zhang, Junling Christie, Peter Zhang, Fusuo Influence of iron plaque on uptake and accumulation of Cd by rice (Oryza sativa L.) seedlings grown in soil. ![]() Considering the high consumption of local rice (339 g capita(- 1) DW d(- 1)) and Cd levels measured, dietary ingestion of 78% of the sampled rice grains would have adverse health risks because the intake exposure of Cd was greater than the JECFA recommended exposures, 0.8 µg Cd BW kg(- 1) day(- 1) or 25 µg Cd BW kg(- 1) month(- 1). More than seventy percent (39 of 53) of the grain samples exceeded the maximum safe concentration of Cd, 0.2 mg kg(- 1) on a dry weight basis. Low average pH values (for air dried oxidized soils) ranging from 4.98 to 6.02 in paddy soil were also found. ![]() The Cd contents of paddy soils averaged 0.228- 1.91 mg kg(- 1), 90% exceeding the allowable limit of 0.3 mg kg(- 1) stipulated by the China Soil Environmental Quality Standards. In order to reveal the Cd contamination in rice and paddy soils and the health risks to the population consuming the local rice grain, field surveys were conducted in eight towns in Youxian, China. Risk assessment of Cd polluted paddy soils in the industrial and township areas in Hunan, Southern China.Ĭadmium ( Cd) contamination in rice in Youxian, Hunan, China is a major environmental health concern. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |