PHYTO-REMEDIATION AND CHEMICAL METHOD OF CdCONTAMINATED WATER-CULTURE ANDCALCAREOUS SOIL | ||||
| Fayoum Journal of Agricultural Research and Development | ||||
| Article 14, Volume 22, Issue 2, July 2008, Page 194-202 PDF (373.13 K) | ||||
| Document Type: Research articles. | ||||
| DOI: 10.21608/fjard.2008.197500 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Mostafa A. Nasef; Amal F. Abd El-Hamide; Samia H. Ashmaye | ||||
| Soils, Water and Environment Res. Inst., Agric. Res. Center, Giza, Egypt | ||||
| Abstract | ||||
| The objectives of the current investigation aimed to a) assess the ability of sorghum plants (Sorghum Bicolor L.) to accumulate cadmium in its tissues (phyto-remediation) and b) compare the efficiency of phyto-remediation and chemical method to extract Cd from either Cd-contaminated water-culture or sandy clay loam calcareous soil. To achieve these objectives, three experiments were conducted, i.e., a) nutri-culture experiment (water-culture), b) green pot experiment using a calcareous soil and c) sequential extraction experiment (laboratory incubation). Cd was applied at the rates of 0, 1 and 2 mg L-1 in the waterculture experiment; and 0, 100 and 200 mg kg-1 in the green pot experiment. The obtained results indicated that dry matter yield of sorghum plants decreased in both the water-culture and pot experiments vs increasing its concentration and uptake in plant tissues with increasing the applied Cd rate. Sequential extraction showed that removal amounts of Cd by ammonium bicarbonate-DTPA (AB-DTPA) as well as ammonium acetate-EDTA progressively increased with increasing Cd rate from 100 up < br />to 200 mg kg-1 soil. Percent removal of Cd by 1st extraction was greater than the 2nd one using either extractant. AB-DTPA extracted about 18 % which nearly double of contaminating Cd by AA-EDTA (about 7 %) | ||||
| Keywords | ||||
| Sorghum plants; cadmium; calcareous soil; hydroponics; sequential extraction; phyto- remediation and chemical method | ||||
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