title: Impact of heavy metal toxicity and constructed wetland system as a tool in remediation.
abstract: The objective of this review is to throw light upon the global concern of heavy metal-contaminated sites and their remediation through an ecofriendly approach. Accumulated heavy metals in soil and water bodies gain entry through the food chain and pose serious threat to all forms of life. This has engendered interest in phytoremediation techniques where hyperaccumulators are used. Constructed wetland has a pivotal role and is a cost-effective technique in the remediation of heavy metals. Metal availability and mobility are influenced by the addition of chelating agents, which enhance the availability of metal uptake. This review helps in identifying the critical knowledge gaps and areas to enhance research in the future to develop strategies such as genetically engineered hyperaccumulators to attain an environment devoid of heavy metal contamination.
authors.affiliation: a Centre for Environmental Studies, Anna University , Chennai , India.
authors.forename: B
authors.initials: B
authors.lastname: Usharani
authors.affiliation: a Centre for Environmental Studies, Anna University , Chennai , India.
authors.forename: N
authors.initials: N
authors.lastname: Vasudevan
mesh_terms: D001673:Biodegradation, Environmental; D052918:Environmental Restoration and Remediation / Q000379:methods*; D019216:Metals, Heavy / Q000378:metabolism* / Q000633:toxicity; D012989:Soil Pollutants / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D053833:Wetlands
chemical_list: D019216:Metals, Heavy; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical
keywords: Chelating agents; constructed wetland system; heavy metals; hyperaccumulators; macrophytes; phytoremediation