14. Macrophytes and Water Purification

Seidel, Käthe

doi:10.9783/9781512807967-015

Cited by 69 publications

(37 citation statements)

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“…Boyd (1970), Stewart (1970), Wooten and Dodd (1976), and Conwell et al (1977) were among the pioneers to demonstrate the nutrient removal potential of aquatic plants. Seidal (1976), Wolverton and McDonald (1976), and Wolverton and Mckown (1976) experimentally proved the importance of aquatic plants in removing organic contaminants from aquatic environments. Thereafter, this approach is emerging as an innovative tool, because plants are solar-driven and thus make this technology a cost-effective mode, with great potential to achieve sustainable environment.…”

Section: Phytoremediationmentioning

confidence: 97%

Phytoremediation Potential of Aquatic Macrophyte, Azolla

Sood

Uniyal

Prasanna

et al. 2011

AMBIO

257

123

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Aquatic macrophytes play an important role in the structural and functional aspects of aquatic ecosystems by altering water movement regimes, providing shelter to fish and aquatic invertebrates, serving as a food source, and altering water quality by regulating oxygen balance, nutrient cycles, and accumulating heavy metals. The ability to hyperaccumulate heavy metals makes them interesting research candidates, especially for the treatment of industrial effluents and sewage waste water. The use of aquatic macrophytes, such as Azolla with hyper accumulating ability is known to be an environmentally friendly option to restore polluted aquatic resources. The present review highlights the phytoaccumulation potential of macrophytes with emphasis on utilization of Azolla as a promising candidate for phytoremediation. The impact of uptake of heavy metals on morphology and metabolic processes of Azolla has also been discussed for a better understanding and utilization of this symbiotic association in the field of phytoremediation.

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Section: Phytoremediationmentioning

confidence: 97%

Phytoremediation Potential of Aquatic Macrophyte, Azolla

Sood

Uniyal

Prasanna

et al. 2011

AMBIO

257

123

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“…Provision of surface for microbial attachment [2,7] Root release of gas and exudates Oxygen leakage-addition of aerobic niches [1,7,15,16] Oxygen leakage-increased aerobic degradation [17,18] Oxygen leakage-supports precipitation of heavy metals [7] Oxygen leakage-increased nitrification Excretion of carbon-increased denitrification [2,11,[19][20][21] Aerobic dynamics are very limited in horizontal flow CWs (HF) [7] Release of antibiotics, phytometallophores and phytochelatins [7,[22][23][24] Root exudates promote metal chelation to prevent metal toxicity [7] Plant uptake…”

Section: Role Of Plants In Cwsmentioning

confidence: 99%

Role of Plants in a Constructed Wetland: Current and New Perspectives

Shelef

Gross

Rachmilevitch

2013

Water

178

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Abstract:The role of plants in the treatment of effluents by constructed wetland (CW) systems is under debate. Here, we review ways in which plants can affect CW processes and suggest two novel functions for plants in CWs. The first is salt phytoremediation by halophytes. We have strong evidence that halophytic plants can reduce wastewater salinity by accumulating salts in their tissues. Our studies have shown that Bassia indica, a halophytic annual, is capable of salt phytoremediation, accumulating sodium to up to 10% of its dry weight. The second novel use of plants in CWs is as phytoindicators of water quality. We demonstrate that accumulation of H 2 O 2 , a marker for plant stress, is reduced in the in successive treatment stages, where water quality is improved. It is recommended that monitoring and management of CWs consider the potential of plants as phytoremediators and phytoindicators.

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“…The Max-Planck Institute Process evolved through work on the ability of higher plants to tolerate, adapt to and eliminate water contaminants (Seidel 1976). Previously it was believed that bulrush (Schoenoplectus lacustris) and other higher plants could only remain healthy in clean water.…”

Section: Rooted Emergent Plant Systems M a X -P L A N C K I N S T I Tmentioning

confidence: 99%