Bioaccumulation of heavy metals in common reed (Phragmites australis) growing spontaneously on highly contaminated mine tailing ponds in Serbia and potential use of this species in phytoremediation
| Autor: | Tamara Rakić, Gordana Andrejić, Jasmina Šinžar-Sekulić, Željko Dželetović, Milijana Prica |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
toxic metals
rhizofiltration Bioconcentration Plant Science 010501 environmental sciences 01 natural sciences Phragmites phytostabilisation Water pollution 0105 earth and related environmental sciences Aquatic ecosystem Rhizofiltration 04 agricultural and veterinary sciences lcsh:QK900-989 15. Life on land Tailings 6. Clean water Phytoremediation 13. Climate action Bioaccumulation Environmental chemistry 040103 agronomy & agriculture lcsh:Plant ecology 0401 agriculture forestry and fisheries Environmental science common reed |
| Zdroj: | Botanica Serbica, Vol 43, Iss 1, Pp 85-95 (2019) |
| ISSN: | 1821-2638 1821-2158 |
| Popis: | Heavy metal contamination of aquatic ecosystems directly threatens the health, production and biodiversity of aquatic and surrounding terrestrial ecosystems, and it represents a serious global problem. Metal extraction during ore processing produces large amounts of wastes that remain in tailings at the mining site. Fine waste particles represent a long-term source of potentially toxic metals that can be released into the ground and surface water as a result of their progressive chemical weathering. Aquatic macrophythes have a major role in absorption and accumulation of heavy metals and thereby in natural water purification. The presence of naturally growing plants on mine tailing ponds indicates their tolerance of heavy metal pollution and suggests a possible role for them in phytoremediation. In the present study, we analysed the concentrations of heavy metals (Fe, Mn, Ni, Zn, Pb, Cd, Co, Cu) in Phragmites australis plants growing spontaneously in shallow water of several mine tailing ponds. The aims of the study were to define chemical properties of the mine spoils, determine the concentrations of heavy metals in different plant organs and assess the phytoremediation potential of common reed. The investigated sediments were notably rich in both total and available forms of Fe, Pb, Zn and Cu, with their upper concentrations close to phytotoxic levels. The greatest amounts of almost all of the investigated metals in plants from all three mine tailing ponds were found in the roots, with their concentrations positively correlated with the amounts of their available forms in the corresponding sediment. The far higher metal concentrations in the roots in comparison with other plant organs clearly indicate that the metals were strongly sequestrated within root cortical tissues and were not transferred across the endodermis. Taken altogether, the presence of the greatest amounts of metals in roots, high bioaccumulation factor and low translocation factor show that P. australis is an excluder plant species with a good phytostabilisation potential. As such, it might be efficiently used in rhizofiltration of wastewaters. |
| Databáze: | OpenAIRE |
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