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Comparative Study on the Remediation Potential of Panicum Maximum and Axonopus Compressus in Zinc (Zn) Contaminated Soil
2019
Ukoh, S.N.B. | Akinola, M.O. | Njoku, K.L.
Soil contamination by heavy metals has increased noticeably within the past years. Unlike organic compounds, metals cannot degrade; therefore effective cleanup is required to reduce its toxicity. This experiment was undertaken to investigate the comparative potential of Panicum maximum and Axonopus compressus to bioremediate zinc polluted soils, the impact of Zn on the antioxidant defense system of the plant, assaying for activities of antioxidants proteins. Zinc salts were mixed with soil at various concentrations 5 mg/kg, 10 mg/kg, 20 mg/kg and 40 mg/kg in triplicates and control was setup. After 4 months, the plants (root, shoot and leaf) and soil were analyzed for morphological, biochemical parameters and Zn concentration. The root length of P. maximum and A. compressus decreased as the concentration of zinc increased. The least shoot length inhibition of A. compressus was 6.16% (5 mg/kg) while the highest shoot length inhibition was 40.14% (40 mg/kg). The least shoot length inhibition of Panicum maximum was 6.16% exposed to 5 mg/kg and the highest shoot length inhibition was 53.13% (40 mg/kg). There was significant reduction of the heavy metals in vegetated soils for P. maximum and A. compressus at the end of the study compared to the heavy metals in the soils at the beginning of the study (p<0.05). P. maximum, is a better removal of Zn than A. compressus, however, it was not significant. Glutathione levels varied significantly (p≤ 0.05) with respect to heavy metals. A. compressus has more effects on Glutathione activities than P. maximum. Zn caused a decrease in metallothionein level in P. maximum while A. compressus metallothionein level increased.
Show more [+] Less [-]Effects of cadmium, copper, lead and zinc on growth, reproduction and survival of the earthworm Eisenia fetida (Savigny): assessing the environmental impact of point-source metal contamination in terrestrial ecosystems.
1994
Spurgeon D.J. | Hopkin S.P. | Jones D.T.
Cadmium availability to wheat in five soil series from the Yonne district, Burgundy, France.
1997
Mench M. | Baize D. | Mocquot B.
Trace elements in vegetables grown in an industrial area in relation to soil and air particulate matter.
1996
Voutsa D. | Grimanis A. | Samara C.
Organochlorine and heavy metal contamination in non-viable eggs and its relation to breeding success in a Spanish population of lesser kestrels (Falco naumanni).
1993
Negro J.J. | Donazar J.A. | Hiraldo F. | Hernandez L.M. | Fernandez M.A.
Levels of polychlorinated biphenyls, organochlorine pesticides, mercury, cadmium, copper, selenium, arsenic, and zinc in the harbour seal, Phoca vitulina, in Norwegian waters.
1990
Skaare J.U. | Markussen N.H. | Norheim G. | Haugen S. | Holt G.
Heavy metals in tissues of waterfowl from the Chesapeake Bay, USA.
1984
Guilo R.T. di | Scanlon P.F.
Historical changes of soil metal background values in select areas of China.
1991
Li J. | Wu Y.
Changes in fruitbody production of mycorrhizal and litter decomposing macromycetes in heavy metal polluted coniferous forests in north Sweden.
1990
Ruehling A. | Soederstroem B.
Toxicity of heavy metals (Zn, Cu, Cd, Pb) to vascular plants. A literature review.
1989
Balsberg Paahlsson A.M.
