title: Potential of kenaf (Hibiscus cannabinus L.) and corn (Zea mays L.) for phytoremediation of dredging sludge contaminated by trace metals.
abstract: The potential of kenaf (Hibiscus cannabinus L.) and corn (Zea mays L.) for accumulation of cadmium and zinc was investigated. Plants have been grown in lysimetres containing dredging sludge, a substratum naturally rich in trace metals. Biomass production was determined. Sludge and water percolating from lysimeters were analyzed by atomic absorption spectrometry. No visible symptoms of toxicity were observed during the three- month culture. Kenaf and corn tolerate trace metals content in sludge. Results showed that Zn and Cd were found in corn and kenaf shoots at different levels, 2.49 mg/kg of Cd and 82.5 mg/kg of Zn in kenaf shoots and 2.1 mg/kg of Cd and 10.19 mg/kg in corn shoots. Quantities of extracted trace metals showed that decontamination of Zn and Cd polluted substrates is possible by corn and kenaf crops. Tolerance and bioaccumulation factors indicated that both species could be used in phytoremediation.
authors: Horticultural Science Laboratory, National Agronomic Institute of Tunisia, 43 Charles Nicolle Street, Tunis Mahragene, Tunisia. saraharb@hotmail.fr
authors: Sarra
authors: S
authors: Arbaoui
authors: Aricia
authors: A
authors: Evlard
authors: Mohamed El Wafi
authors: Mel W
authors: Mhamdi
authors: Bruno
authors: B
authors: Campanella
authors: Roger
authors: R
authors: Paul
authors: Taoufik
authors: T
authors: Bettaieb
mesh_terms: D001673:Biodegradation, Environmental; D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D031584:Hibiscus / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D012722:Sewage / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D015032:Zinc / Q000032:analysis / Q000378:metabolism*
chemical_list: D012722:Sewage; D012989:Soil Pollutants; D002104:Cadmium; D015032:Zinc