Uptake of Toxic Heavy Metals by Rice (Oryza sativa L.) Cultivated in the Agricultural Soil near Zhengzhou City, People’s Republic of China

Abstract

Higher accumulation of toxic heavy metals in rice grown in agricultural soil may lead to health disorder. A field experiment was carried out to investigate uptake and translocation of Cd, Cr, Pb, As, and Hg by different parts of rice plant in various irrigation regions. The results showed the rice grain contained significantly lower amounts of five metals than straw and root in all sampling sites. Rice root accumulated Cd, As, and Hg from the paddy soil. Moreover, the rice plant transported As very weakly, whereas Hg was transported most easily into the straw and grain among studied heavy metals.

Association of Heavy Metals and Selenium Content in Rice with Incidence of Esophageal Cancer in Golestan Province, Iran

“…The concentration of Zn, Cd, Pb, Co and Ni did not show any significant difference in the low-and highrisk areas for EC. Several studies have reported the list of heavy metals in various crops such as rice [1,10,17]. Due to high application of chemical fertilizers and pesticides in rice farms, rice produced in this region can act as a main source of heavy metals [18].…”

“…The main pathway of human exposure to heavy metals is intake via the soil-crop system [1]. Among heavy metals, cadmium (Cd), lead (Pb), arsenic and mercury are considered toxic to plants, humans and soil microbial population [1,2].…”

“…The main pathway of human exposure to heavy metals is intake via the soil-crop system [1]. Among heavy metals, cadmium (Cd), lead (Pb), arsenic and mercury are considered toxic to plants, humans and soil microbial population [1,2]. Heavy metals have an important role in human health because of their nutritive value and possible harmful effects [3,4].…”

“…Rice is the staple food for many people in the world. Heavy metal concentrations in rice have been studied in rice-producing countries such as China and Thailand [1,10]. Rice is grown in different areas in Iran, mainly in Northern provinces near the Caspian Sea such as Golestan Province.…”

Uptake of Toxic Trace Metals (Cd, Pb) and Micro Nutrients (Cu, Zn, Mn) by Sugarcane (Saccharum Officinarum L.) Irrigated with Treated Effluents of Sugar Industry

“…13 -22 2014 they are valued as fertilizer. When applied to soil through irrigation, they are reported to increase the yield of sugar cane, rice, and wheat (Liu et al 2007). However, long-term use of industrial effl uents for irrigation may cause the concentrations of the trace metals Cd, Cu, Zn, Pb, and Mn to increase in surface soil, which may affect food quality and safety (Ibrahim et al 1998).…”