Phytoremediation: A Remediation Technology of Heavy Metal Contaminated Soils
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Phytoremediation is a sustainable cost effective and ecofriendly technique that employs plants and microorganisms for the cleanup of contaminated environments. Among different techniques of phytoremediation, three methods include phytostabilization, phytovolatilization and phytoextraction are used for the removal heavy metals from contaminated soils. Capability of accumulating high levels of heavy metals, large biomass production, the extensive root system, strong defense system and no entrance of produced biomass to food chain are the most important properties of suitable plants for phytoremediation of heavy metal contaminated soils. The results of several studies have shown that among different plants, the family Salicaceae is attended as suitable candidates for phytoremediation of heavy metal contaminated soils due to fast growth, wide-spreading root system, metal tolerance and ability to accumulate heavy metals. Various techniques to enhance of phytoremediation efficiency of heavy metal contaminated soils have been subjected such as the use of transgenic plants, increase of bioavailability of heavy metals in soil, increase of plant growth and biomass production and the use of microorganisms. Finally, since lot of biomass is produced during this process, it needs proper disposal and management. In this study, the phytoremediation is discussed as a sustainable technology for remediation of heavy-metal contaminated soils from different aspects.
Language:
Persian
Published:
Human & Environment, Volume:17 Issue: 2, 2019
Pages:
27 to 42
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