Sorption of toxic heavy metals to soil

Alumaa, Priit; Кирсо, У.; Petersell, V.; Steinnes, E.

doi:10.1078/1438-4639-00114

Cited by 37 publications

(17 citation statements)

References 2 publications

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“…However, earthworms from Furnas and Santa Maria differed significantly in the concentrations of Zn, the concentrations being almost twofold higher in the former. Factors such as pH, %clay-silt, and %OM are recognized to influence metal bioavailability in soils (Alumaa et al, 2002;Depledge et al, 1994;Kennette et al, 2002). Therefore, the Santa Maria soils, that have considerably higher %clay-silt than Furnas soils, have significantly higher adsorption levels of Zn, even though the levels of Zn in the soils were not statistically different.…”

Section: Discussionmentioning

confidence: 99%

Bioavailability and cellular effects of metals on Lumbricus terrestris inhabiting volcanic soils

Amaral

Soto

Cunha

et al. 2006

Environmental Pollution

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In earthworms, differences in the chloragogenous tissue morphometry may be related to the bioavailability of metals in soils. AbstractWhether the radial thickness (RT) of the chloragogenous tissue and intestinal epithelium of earthworms (Lumbricus terrestris) reflects the bioavailability of metals in soils was investigated in two areas, one with active volcanism (Furnas) and another with no volcanic activity since 3 million years ago (Santa Maria), in the Azores. Metal contents in soil samples and earthworms from the two areas were analyzed. Autometallography and measurements of the RT were performed in the chloragogenous tissue and intestinal epithelium. Earthworms from the active volcanic area demonstrated lower RT of chloragogenous tissue and intestinal epithelium as well as higher levels of bioavailable metals, especially Zn and Cd. Comparison of bioavailable metal contents between both areas suggests a higher risk for uptake of potentially toxic metals in the active volcanic area than in the non-active volcanic area, which is reflected by the lower RT of the chloragogenous tissue and intestinal epithelium in the former.

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Section: Discussionmentioning

confidence: 99%

Bioavailability and cellular effects of metals on Lumbricus terrestris inhabiting volcanic soils

Amaral

Soto

Cunha

et al. 2006

Environmental Pollution

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“…However, as natural process, the partition of the soluble metal added to soils, together with the covarying solution chemistry, are controlled by soil properties (Alumaa et al 2002;Ponizovsky et al 2008;Yu et al 2002), while the artificial leaching may disturb the entire soil solution except for counterions and generate temporary thermodynamic equilibriums which might be largely determined by leaching process (e.g., the duration of leaching, the composition of leaching solution, and the total volume of leaching solution). Hence, to what extent the leaching is sufficient, that is, whether the leaching effect following a conventional leaching protocol is comparable among soils and whether the leaching effect can be predicted with soil parameters, are critically important.…”

Section: Leaching Effect On Ni Concentration and Ec50 In Soilsmentioning

confidence: 99%

Leaching impacts Ni toxicity differently among soils but increases its predictability according to nitrification assay

Huang

et al. 2009

J Soils Sediments

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Purpose Deriving toxicity thresholds through bioassays has become the scientific basis for the risk assessment of metal contamination in soils, but few studies have been reported for Ni toxicity in Chinese soils. In addition, although leaching has been recommended to increase the ecological relevance of the output of soil toxicity bioassays, its impacts on Ni threshold and soil solutions in soils remained to be shown. Therefore, in this study, 17 soils were collected throughout China and were assessed for Ni toxicity using substrate-induced nitrification (SIN) assay for both un-leached and leached treatments. Meanwhile, soil solutions of all Ni treatments were extracted and analyzed. This study provides information for the development of a terrestrial biotic ligand model (TBLM) for Ni in Chinese soils.Materials and methods Soils were artificially amended with NiCl 2 solution to generate nominal Ni contamination levels, and aliquot of each Ni treatment was leached with artificial rain to prepare leached soil samples. All the 17 unleached and the 17 leached soils were subjected to the standard SIN protocol. A total of 816 microcosm tubes were established. Soil solution was extracted, and the solution physiochemical properties were analyzed for each Ni treatments. Both the total-Ni-based and the solution-Nibased median effective concentrations (EC50) in unleached soils and leached soils were calculated from dose-response curves. Free-Ni 2+ -based EC50 was also calculated based on solution chemical properties. Leaching effect was assessed based on these results. Results and discussion Ni EC50 varied largely among soils for both the total-Ni-based and the solution-Ni-based EC50 in un-leached soils. In un-leached soils, the total-Ni-based EC50 values ranged from 52.8 mg kg −1 (Hulunber soil) to 2,385.4 mg kg −1 (Wulumuqi soil), and the solution-Nibased EC50 ranged from 0.70 mg L −1 (Jiaxing soil) to 293.35 mg L −1 (Wulumuqi soil). Stepwise multiple regressions showed that soil pH and total Ca were the best predictors for the total-Ni-based EC50. Protective effects of Ca 2+ and Mg 2+ but not H + against Ni toxicity in soil solution were found. Leaching impacted Ni EC50 differently among soils, with leaching factor ranging from 0.2 (Haikou soil) to 19.7 (Hulunber soil) for the total-Ni-based EC50 and from 0.1 (Dezhou soil) to 35.7 (Jiaxing soil) for the solution-Ni-based EC50. In addition, predictability of Ni EC50 was higher in leached soils. The variations in Ni EC50 were in agreement with the findings in previous studies. Soil pH and Ca may play important roles in the partition of Ni in Chinese soils and thus impact the Ni toxicity. Protective effects of Ca 2+ and Mg 2+ in soil solutions against Ni toxicity may exist, but the role of H +

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“…Various soils show a very different behavior in sorption of heavy metals (Alumaa, Kirso, Petersell, & Steinnes, 2002), because the concentration of each heavy metal is always controlled by different parameters (soil pH, iron and aluminum oxide content, clay content, organic matter and cation exchange capacity) (Hernandez, L. Probst, A. Probst, & Ulrich, 2003). Various metals also exhibit different preferential leaching from soils.…”

mentioning

confidence: 99%

Effects of Acid Rain on Competitive Releases of Cd, Cu, and Zn from Two Natural Soils and Two Contaminated Soils in Hunan, China

Liao

Guo

Zeng

et al. 2007

Water Air Soil Pollut: Focus

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Leaching experiments of rebuilt soil columns with two simulated acid rain solutions (pH 4.6-3.8) were conducted for two natural soils and two artificial contaminated soils from Hunan, southcentral China, to study effects of acid rain on competitive releases of soil Cd, Cu, and Zn. Distilled water was used in comparison. The results showed that the total releases were Zn>Cu>Cd for the natural soils and Cd>Zn≫Cu for the contaminated soils, which reflected sensitivity of these metals to acid rain. Leached with different acid rain, about 26-76% of external Cd and 11-68% external Zn were released, but more than 99% of external Cu was adsorbed by the soils, and therefore Cu had a different sorption and desorption pattern from Cd and Zn. Metal releases were obviously correlated with releases of TOC in the leachates, which could be described as an exponential equation. Compared with the natural soils, acid rain not only led to changes in total metal contents, but also in metal fraction distributions in the contaminated soils. More acidified soils had a lower sorption capacity to metals, mostly related to soil properties such as pH, organic matter, soil particles, adsorbed SO 2À 4 , exchangeable Al

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Sorption of toxic heavy metals to soil

Cited by 37 publications

References 2 publications

Bioavailability and cellular effects of metals on Lumbricus terrestris inhabiting volcanic soils

Bioavailability and cellular effects of metals on Lumbricus terrestris inhabiting volcanic soils

Leaching impacts Ni toxicity differently among soils but increases its predictability according to nitrification assay

Effects of Acid Rain on Competitive Releases of Cd, Cu, and Zn from Two Natural Soils and Two Contaminated Soils in Hunan, China

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