The bioavailability of cadmium to lettuce and cabbage in soils previously treated with sewage sludges

Jackson, Andrew P.; Alloway, B. J.

doi:10.1007/bf00010398

Cited by 77 publications

(42 citation statements)

References 19 publications

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“…It indicates that CaCl2, NH4NO3, Ca(NO 3 ) 2 , and NH 4 C1 were sensitive to soil pH and in general supernatant pHs were within 0.3-0.5 pH units of the soil water pH. This type of relationship for pH and NH4NO3 has been previously reported by He & Singh (1994), Guttormsen et al (1995), andMcLaughlin et al (1999) and for CaCl 2 by Sauerbeck & Styperek (1985), Jackson & Alloway (1991), and Whitten & Ritchie (1991). EDTA on the other hand, although adjusted to pH 6.0 is not buffered and reflected the soil pH, however not to the same extent as NH4NO3 and CaCl2 .…”

Section: Soil Extractantssupporting

confidence: 79%

Effect of soil pH on cadmium phytoavailability in some New Zealand soils

Gray¹,

McLaren

Roberts

et al. 1999

New Zealand Journal of Crop and Horticultural Science

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The effect of soil pH on plant cadmium (Cd) concentrations was investigated in a glasshouse study, in conjunction with an evaluation of eight soil extractants as predictors of Cd concentrations in different plant species. Results showed that in general, increasing soil pH from 5.5 to 7.0 significantly decreased Cd concentrations in clover, lettuce, carrot, and ryegrass, and to a lesser extent in wheat, although the magnitude of the reduction varied between plant species and soil types. Soil extractants which were sensitive to soil pH e.g., 0.05M Ca(NO 3 ) 2 , IMNH4CI, and O.O5MCaCl 2 or extract moderate amounts of Cd e.g., IA/NH4OAC and 0.04M EDTA were found to be the most effective in predicting plant Cd concentrations. Cd solubility as predicted using a semi-empirical equation which contained terms forpH, organic matter, and total Cd concentration was also found to be successful in estimating plant Cd concentrations for a number of plant species. It appears that pH may be a powerful tool in the management of plant Cd concentrations, however its true potential needs to be evaluated in a field situation.

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Section: Soil Extractantssupporting

confidence: 79%

Effect of soil pH on cadmium phytoavailability in some New Zealand soils

Gray¹,

McLaren

Roberts

et al. 1999

New Zealand Journal of Crop and Horticultural Science

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“…These findings are in agreement with previously performed similar studies [23]. The cell wall of filamentous algae, such as P. oedogonia, consists of macromolecules, such as cellulose and other compounds, such as b-1, 4-glucopyroside [26][27][28][29]. Moreover, storage compounds, such as amylase and amyl pectin may also be present on the cell wall [30,31].…”

Section: Discussionsupporting

confidence: 90%

Thermodynamic and Kinetic Investigations for Biosorption of Chromium(VI) With Green Algae (Pithophora oedogonia)

Suleman¹,

Noman²,

Atif³

et al. 2017

J Bioremediat Biodegrad

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Heavy metals are the conservative pollutants which cannot be degraded by bacterial attack and are permanent addition to marine environment. Their conservation usually exceeds the allowable levels usually found in water ways and soil. They locate their way up the food chain and due to their accumulation, can disrupt biological process. Recently, biosorption has come up as effective tool in which biomass of various organisms have been tested. In the present study, the biosorptive potential of algae biomass of green algae (Pithophora oedogonia) has been investigated for removal of toxic heavy metal, such as chromium (VI) ions. Various physico-chemical factors have been optimized for biosorptive capacities of sorbates by sorbents. Optimum pH was found to be 4 and optimum temperature was 30°C for Cr (VI). Various adsorption models were elucidated to data, such as Langmuir, Freundlich and Temkin isotherms whereas Freundlich model was found to be fittest showing multilayer sorption. Pseudo-second order kinetic model was also found to fit for this study with regression coefficient value of 0.97. Additionally, Fourier Transform Infra-red Spectroscopic studies (FTIR) indicated various electronegative functional groups on the surface of green algae (Pithophora oedogonia) which could possibly offer the binding sites for cations under investigation.

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“…Plant Cu, Ni, Pb and Zn concentrations were determined on homogenised samples of each plant in each pot by nitric acid digestion (Jackson and Alloway 1991) and atomic absorption spectrophotometry (Perkin-Elmer, model 2100, ‹berlingen, Germany). The wavelengths were: Cd, 230.0 nm; Cu,324.8 nm;Pb,283.3;and Zn,213.9 nm.…”

Section: Greenhouse Experimentsmentioning

confidence: 99%

“…Once accumulated, heavy metals are highly persistent in the topsoil (Alloway and Jackson 1991) and can cause potential problems such as phytotoxicity (Berti and Jacobs 1996) or elevated transfer to the food chain (Page et al 1987). The phytoavailability of heavy metals present in the sewage sludge depends on many factors such as the nature and amount of metal, degree of metal association in the sludge, soil, plant characteristics and weather conditions (Jin et al 1996).…”

mentioning

confidence: 99%

Bioavailability of heavy metals in soils amended with sewage sludge

Morera¹,

Echeverría²,

Garrido³

2002

Can. J. Soil. Sci.

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Morera, M. T., Echeverría J. and Garrido, J. 2002. Bioavailability of heavy metals in soils amended with sewage sludge. Can. J. Soil Sci. 82: [433][434][435][436][437][438]. The recycling of sewage sludge to agricultural land results in the slow accumulation of potentially toxic heavy metals in soils. A greenhouse experiment was conducted to determine the bioavailability of Cu, Ni, Pb and Zn applied to soils in urban anaerobically stabilized sewage sludge. The soils were Lithic Haplumbrept (Lh), Calcixerollic Xerochrept (Cx1 and Cx2) and Paralithic Xerorthent (Px). Sunflower plants (Helianthus annuus L) were grown in the soils following amendment with the sludge. The addition of sewage sludge markedly increased the average dry weight of the plants in the soils that had lower yields without sludge addition (Lh, Cx2, and Px). The acid pH of the Lh soil favoured the bioavailability of Zn from sewage sludge. The bioavailability of Cu was greater in the alkaline soils than in the acidic soil (Lh), which can be attributed to the high organic matter content of the Lh soil which complexes Cu and impairs its uptake by the plants. The concentration of metals in the plants increased with the sewage sludge dose. The effect of the soil type on the metal concentration in plants was greater that the effect of the dose. Le pH acide du Lh accroît l'absorption du Zn des boues par les plantes. La biodisponibilité du Cu est plus importante dans les sols alcalins que dans le sol acide (Lh). On l'attribue à la forte concentration de matière organique dans le Lh et à la formation de complexes avec le Cu, ce qui empêche les végétaux d'absorber cet élément. La concentration de métaux dans la plante augmente avec la quantité de boues usées employée. Le type de sol agit plus sur la concentration de métaux lourds dans la plante que le volume de boues usées.

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The bioavailability of cadmium to lettuce and cabbage in soils previously treated with sewage sludges

Cited by 77 publications

References 19 publications

Effect of soil pH on cadmium phytoavailability in some New Zealand soils

Effect of soil pH on cadmium phytoavailability in some New Zealand soils

Thermodynamic and Kinetic Investigations for Biosorption of Chromium(VI) With Green Algae (Pithophora oedogonia)

Bioavailability of heavy metals in soils amended with sewage sludge

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