This study is done to measure the absorption and distribution of cadmium in different parts of kidney beans, radishes and pumpkins. Three parts of a field was chosen. In one part 65 ppm of cadmium nitrate was added to water and in the other part 130 ppm, the last part was irrigated with normal water. Samples were digested by EPA 3050 method. Cadmium concentration was measured by Unicam 919 absorption unit. Beans accumulate cadmium mostly in root (70 ppm) and a little amount is mobilized through upper parts (12-16ppm), but kidneys did not accumulate a significant amount. In radishes the roots did not accumulate a significant amount of cadmium but stems had 4 ppm and leaves had 25 ppm. Cadmium concentration in soil does not affect its concentration in different parts of pumpkins and beside the stems and leaves (4 ppm) the other partsï¿½ concentrations were insignificant. In regard to the results of this study the cadmium concentrations in edible parts of the samples (kidney beans, radish roots and pumpkin fruit) were less than the U.S. EPA standards for agriculture and human beings.
Anonymous, Commission on geosciences, Environmental and Resources (CGER), (1996). Useof Reclaimed Water and Sludge in food Crop Production. National Academic Press, Washington, DC.
Anonymous, U. S. Environmental Protection Agency., (1995). Process Design Manual: Land application of sewage sludge and domestic septage. EPA/625/R-95/001, Washington., Abstract
Anonymous, U. S. Environmental Protection Agency., (1995). Test methods for the evaluating solid waste, SW-846. ffice of Solid Waste and Emergency Response, Washington.,
Doyle, P. J., (1998). Survey of literature and experience on
the disposal of sewage on land. (Accessed 10 February 2005). - Abstract
Ermst, W. H. O., (1996). Bioavailability of heavy metals and decontamination of soil by plants. Appl. Geochem., 11 (1-2), 163-176 (14 Pages), DOI: 10.1016/0883-2927(95)00040-2. Abstract | Full Text (599 K)
Gardiner, D. T., Miller, R. W., Badamchian, B., Azzari, A. S.
and Sisson, D. R., (1995). Effects of repeated sewage sludge applications on plant accumulation of heavy metals. Agri. Eco. Environ., 55, 1-6 (6 Pages)Abstract
Kabata-Pendias, A. and Pendias, H., (1992). Trace elements in soils and plants. 2nd. Ed., CRC Press, Inc., Boca Raton, Florida. Abstract
Lasat, M. M., (2002). The use of plants for the removal of
toxic metals from contaminated soils. 2002011154, U. S. environmental agency., Abstract
Miller, R. W., Al-Khazraji, M. L., Sisson, D. R. and Gardiner,
D. T., (1995). Alfalfa growth and absorption of cadmium and zinc from soils amended with sewage sludge. Agri. Eco. Environ., 53, 179-184 (6 Pages)Abstract
Nourbakhsh, Sh., Ghazanfari Moghaddam, A., (2001). Effect of heavy metals in soil on growth and edible parts of plants, Fourth Environmental Sanitary Congress. Shahid Saddoughi University,Yazd, Iran., , 7-15 (9 Pages)
Robinson, B. H., (1997). The phytoextraction of metals from metalliferous soils, Ph.D. Thesis, Massy University, New Zealand.,