Greenhouse studies on the phyto-extraction capacity of Cynodon nlemfuensis for lead and cadmium under irrigation with treated wastewater

Madyiwa, Simon; Chimbari, Moses John; Schutte, C.F; Nyamangara, Justice

doi:10.1016/j.pce.2003.08.029

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…In the soil solutions from L. perenne at original pH the HMs were not in ionic form (they are complexed) and they were converted into free forms after acidification to pH 3 (30%) (Fig. 4) and the phytoextracted amounts of HMs were very low (Table 4), which is in agreement with [43]. In the soil solutions from S. smithiana and T. caerulescens there were differences in uptake among the focused HMs, because S. smithiana and T. caerulescens have different growing strategies [35], and it is better to allude about each focused HM separately.…”

Section: The Hm Bioavailabilitysupporting

confidence: 82%

The use of differential pulse anodic stripping voltammetry and diffusive gradient in thin films for heavy metals speciation in soil solution

et al. 2008

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Abstract:In the soil solutions obtained in situ with suction cups from soils (Cambisol and Fluvisol) of pot experiment with Salix smithiana Smith, Lolium perenne L. and Thlaspi caerulescens J. & C. Presl heavy metals species (Cd, Pb and Cu) were assayed by differential pulse anodic stripping voltammetry and diffusive gradient in thin films. Prediction of accumulation performed best at free metal ion concentrations in unchanged pH (in 10 -3 mol L -1 NaClO 4 base electrolyte). The speciation provided by differential pulse anodic stripping voltammetry according to pH can provide a detailed description of the soil solution matrix. The concentration of free metals in unchanged pH represents a small part of the total content and varied from 0.04 to 0.75% with two exceptions found for accumulating plants (the content of Cd 2+ in the soil solution from T. caerulescens was about 6% and the content of Cu 2+ in the soil solution from S. smithiana was about 30%). The available concentration as determined by diffusive gradient in thin films was not in correlation with the heavy metals concentration in plant biomass. Warsaw and Springer-Verlag Berlin Heidelberg. © Versita

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Section: The Hm Bioavailabilitysupporting

confidence: 82%

The use of differential pulse anodic stripping voltammetry and diffusive gradient in thin films for heavy metals speciation in soil solution

et al. 2008

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“…In contrast to these findings, other studies (for example, Chantachon et al, 64 Burke et al, 65 Brown and Brinkmann, 66 Lai and Chen, 67 Pichtel and Salt, 68 Longhurst et al 69 ) reported uptake of Pb by grasses or a strong correlation between soil and grass concentrations. [70][71][72] In some cases, 66,[73][74][75][76] strong uptake of Pb from contaminated soils has been reported. Kralovec and Slavik 77 concluded that the supply of heavy metals, including that of Pb, by atmospheric deposition was negligible at their study site.…”

Section: Introductionmentioning

confidence: 99%

Lead in grass in the Scottish uplands: deposition or uptake?

Bacon¹,

Hewitt²,

Cooper³

2005

J. Environ. Monit.

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If it is assumed that the Pb collected in grass samples is derived mainly from atmospheric deposition then grass samples can be used as a convenient and easily analysed monitor for Pb deposition, in particular to establish the isotopic composition of current deposition in remote locations. As some studies have demonstrated a strong correlation between soil and grass Pb concentrations, it was considered important to establish the proportion of soil Pb in the grasses used to monitor atmospheric deposition at upland locations in Scotland. Consideration of earlier studies provided evidence that very little, if any, Pb in grass was derived from soil. Lead isotope analysis, by thermal ionisation mass spectrometry, of grasses grown on soils spiked with enriched (207)Pb in the field situation allowed the relative contribution of atmospheric deposition and soil to the grass Pb to be calculated. In most cases, >80% of Pb in grass was derived from atmospheric deposition and in recent years this value was >90%. Recalculation of the (206)Pb/(207)Pb ratio in grass samples showed that there was very little error in the results, published previously, which were based on the assumption that all the Pb collected with grass was derived from the atmosphere. The trends established by measuring the (206)Pb/(207)Pb ratio in grasses were confirmed and remain valid.

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“…Their research also showed that soil media captures between 88% and 97% of the metal inputs, whereas only 0.5% accumulates in the plants, and the remaining 2% to 11.6% escapes out of the system. Several previous studies have confirmed that different plants exhibit a different capacity to accumulate heavy metals in biofiltration systems [15][16][17][18].…”

Section: Introductionmentioning

confidence: 81%

Distribution of Heavy Metals in Vegetative Biofiltration Columns

Chowdhury

Abaya

Ksiksi

et al. 2020

Water

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This study investigated the distribution of heavy metals in vegetative biofiltration columns irrigated by synthetic greywater. Twelve species of ornamental plants (three plants from each species) were planted in the same designed 36 biofiltration columns. Samples of effluent water, soils, roots, shoots and leaves were collected and analyzed. It was observed that before irrigation, the distribution of copper was in soils (0%), roots (42%), leaves (37%) and shoots (21%). After irrigation, this distribution changed to soils (29%), roots (39%), leaves (17%) and shoots (15%). It was found that lead concentrations decreased in soils from (84% to 7%), but increased in plants (from 16% to 93%) following irrigation with greywater. In contrast, the distribution of zinc changed from leaves (46%), roots (22%) and soils (16%) before irrigation to 89% in leaves and soils and 11% in shoots following irrigation. The chromium distribution before and after irrigation was found to be almost unchanged in soils, shoots and effluent water, but it increased in roots (19.4% to 26.9%) and decreased in leaves (11.4% to 5.8%). The outcomes of this study demonstrated that heavy metals mostly accumulate in soils and roots, and it is necessary to investigate their potential detrimental effects on the receiving environment.

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Greenhouse studies on the phyto-extraction capacity of Cynodon nlemfuensis for lead and cadmium under irrigation with treated wastewater

Cited by 14 publications

References 6 publications

The use of differential pulse anodic stripping voltammetry and diffusive gradient in thin films for heavy metals speciation in soil solution

The use of differential pulse anodic stripping voltammetry and diffusive gradient in thin films for heavy metals speciation in soil solution

Lead in grass in the Scottish uplands: deposition or uptake?

Distribution of Heavy Metals in Vegetative Biofiltration Columns

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