Influence of Soil Chemistry and Plant Physiology in the Phytoremediation of Cu, Mn, and Zn

Pinto, Edgar; Aguiar, Ana; Ferreira, Isabel M. P. L. V. O.

doi:10.1080/07352689.2014.885729

Cited by 75 publications

(28 citation statements)

References 236 publications

(328 reference statements)

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“…When soil pH becomes acid, the bioavailability of cations generally increases due to replacement of cations on soil cation exchange capacity sites by H þ ions. For example, by lowering the soil pH, the adsorption of Zn is reduced, resulting in the mobilization and potentially leaching of Zn (Pinto et al, 2014). Conversely, if the pH increases the bioavailability of heavy metals often decreases.…”

Section: Discussionmentioning

confidence: 99%

“…It has been proposed as a cheaper option for remediation of heavy metal contaminants but questions remain concerning the viability and sustainability of this technology (Pilon-Smits and Freeman, 2006;Pinto et al, 2014). Plants can be used to immobilize heavy metal contaminants in a substrate (phytostabilization) so limiting exposure by susceptible biota.…”

Section: Introductionmentioning

confidence: 99%

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Irrigation water quality influences heavy metal uptake by willows in biosolids

Laidlaw

Baker

Gregory

et al. 2015

Journal of Environmental Management

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Phytoextraction is an effective method to remediate heavy metal contaminated landscapes but is often applied for single metal contaminants. Plants used for phytoextraction may not always be able to grow in drier environments without irrigation. This study investigated if willows (Salix x reichardtii A. Kerner) can be used for phytoextraction of multiple metals in biosolids, an end-product of the wastewater treatment process, and if irrigation with reclaimed and freshwater influences the extraction process. A plantation of willows was established directly onto a tilled stockpile of metal-contaminated biosolids and irrigated with slightly saline reclaimed water (EC ∼2 dS/cm) at a wastewater processing plant in Victoria, Australia. Biomass was harvested annually and analysed for heavy metal content. Phytoextraction of cadmium, copper, nickel and zinc was benchmarked against freshwater irrigated willows. The minimum irrigation rate of 700 mm per growing season was sufficient for willows to grow and extract metals. Increasing irrigation rates produced no differences in total biomass and also no differences in the extraction of heavy metals. The reclaimed water reduced both the salinity and the acidity of the biosolids significantly within the first 12 months after irrigation commenced and after three seasons the salinity of the biosolids had dropped to <15% of initial values. A flushing treatment to remove excess salts was therefore not necessary. Irrigation had an impact on biosolids attributes such as salinity and pH, and that this had an influence on metal extraction. Reclaimed water irrigation reduced the biosolid pH and this was associated with reductions of the extraction of Ni and Zn, it did not influence the extraction of Cu and enhanced the phytoextraction of Cd, which was probably related to the high chloride content of the reclaimed water. Our results demonstrate that flood-irrigation with reclaimed water was a successful treatment to grow willows in a dry climate. However, the reclaimed water can also change biosolids properties, which will influence the effectiveness of willows to extract different metals.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Irrigation water quality influences heavy metal uptake by willows in biosolids

Laidlaw

Baker

Gregory

et al. 2015

Journal of Environmental Management

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“…The frequent use of chemical fertilisers and pesticides constitutes a major part of attempts to increase food production. These chemicals enter the soil and mix with ground water, leading to pollution of the entire ecosystem (Pinto et al 2014). Such agrochemical pollutants adversely affect ecosystem food chains and have serious negative effects on all living organisms, including humans (Phalan et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Enterobacter asburiae KE17 association regulates physiological changes and mitigates the toxic effects of heavy metals in soybean

et al. 2015

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This study aimed to elucidate the role played by Enterobacter asburiae KE17 in the growth and metabolism of soybeans during copper (100 μm Cu) and zinc (100 μm Zn) toxicity. When compared to controls, plants grown under Cu and Zn stress exhibited significantly lower growth rates, but inoculation with E. asburiae KE17 increased growth rates of stressed plants. The concentrations of plant hormones (abscisic acid and salicylic acid) and rates of lipid peroxidation were higher in plants under heavy metal stress, while total chlorophyll, carotenoid content and total polyphenol concentration were lower. While the bacterial treatment reduced the abscisic acid and salicylic acid content and lipid peroxidation rate of Cu-stressed plants, it also increased the concentration of photosynthetic pigments and total polyphenol. Moreover, the heavy metals induced increased accumulation of free amino acids such as aspartic acid, threonine, serine, glycine, alanine, leucine, isoleucine, tyrosine, proline and gamma-aminobutyric acid, while E. asburiae KE17 significantly reduced concentrations of free amino acids in metal-affected plants. Co-treatment with E. asburiae KE17 regulated nutrient uptake by enhancing nitrogen content and inhibiting Cu and Zn accumulation in soybean plants. The results of this study suggest that E. asburiae KE17 mitigates the effects of Cu and Zn stress by reprogramming plant metabolic processes.

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“…In the case of heavy metals, phytoextraction is an environmentally friendly and cost-effective method of soil remediation, though requiring specific scientific knowledge for successful practical implementation (Guala et al, 2011;Yang et al, 2014). Choice of correct plant species to achieve a particular aim is of critical importance (Pinto et al, 2014). Desired characteristics of a selected plant species include tolerance to particular metals, capacity to accumulate target metals in plant shoots, ability to grow vigorously in particular conditions, large biomass etc.…”

Section: Introductionmentioning

confidence: 99%

Physiological Responses of Wetland Species Rumex Hydrolapathum to Increased Concentration of Biogenous Heavy Metals Zn and Mn in Substrate

Ievinsh

Dišlere

Karlsons

et al. 2020

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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Communicated by Mâris KïaviòðThe aim of the present study was to determine if individuals of Rumex hydrolapathum Huds native to saline wetlands are able to tolerate high concentration of biogenous heavy metals Zn and Mn in substrate and to accumulate high concentration of these metals in aboveground parts. Plant physiological status was monitored by using non-destructive analysis of chlorophyll and chlorophyll a fluorescence. R. hydrolapathum plants accumulated up to 1840 mg·kg -1 Zn and 6400 mg·kg -1 Mn in older leaves. The usefulness of monitoring changes in chlorophyll concentration and chlorophyll a fluorescence parameters to predict physiological response of R. hydrolapathum plants to excess Zn and Mn was not supported, as the lack of significant changes indicated that the model species showed adaptation to increased amount of metals in actively photosynthesizing tissues. It appears that Zn and Mn tolerance of R. hydrolapathum is based primarily at the physiological level where metal accumulation in younger leaves and roots is restricted, and development of new leaves is promoted together with induction of senescence in older leaves that have accumulated the majority of Zn and Mn. R. hydrolapathum can be characterised as a very promising model species for further studies for practical phytoremediation needs.

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Influence of Soil Chemistry and Plant Physiology in the Phytoremediation of Cu, Mn, and Zn

Cited by 75 publications

References 236 publications

Irrigation water quality influences heavy metal uptake by willows in biosolids

Irrigation water quality influences heavy metal uptake by willows in biosolids

Enterobacter asburiae KE17 association regulates physiological changes and mitigates the toxic effects of heavy metals in soybean

Physiological Responses of Wetland Species Rumex Hydrolapathum to Increased Concentration of Biogenous Heavy Metals Zn and Mn in Substrate

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