Effect of soil properties on the toxicity of Pb: Assessment of the appropriateness of guideline values

Romero‐Freire, Ana; Peinado, F. Martín; Gestel, Cornelis A.M. van

doi:10.1016/j.jhazmat.2015.02.034

Cited by 73 publications

(34 citation statements)

References 57 publications

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“…OM content best predicted K FC values (Table S9), which agrees with soil organic matter acting as a crucial sink for Pb (S anchez-Camazano et al, 1998). Romero-Freire et al (2015) reported that soils with higher organic carbon and pH had lower extractable Pb concentrations, confirming the important roles of pH and organic carbon in controlling Pb partitioning in soils. Besides CEC, pH pw also was an important factor for K FP based on porewater Pb concentration.…”

Section: Soil Properties and Pb Extractabilitysupporting

confidence: 77%

Effect of soil properties on Pb bioavailability and toxicity to the soil invertebrate Enchytraeus crypticus

2019

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Section: Soil Properties and Pb Extractabilitysupporting

confidence: 77%

Effect of soil properties on Pb bioavailability and toxicity to the soil invertebrate Enchytraeus crypticus

2019

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“…Soil leaching is a complex phenomenon in which many factors may influence the release of heavy metals. A previous analysis of soil solutions showed that, depending on soil type, leaching removed the metal salt anions, chloride, calcium, and sodium and increased soil solution pH by up to 0.75 units, likely because most of the soils had a net negative charge (Romero-Freire et al 2015). In the present study, soil leaching was found to decrease the Pb toxicity (i.e.…”

Section: Influence Of Soil Leaching On Pb Toxicitysupporting

confidence: 62%

Toxicity threshold of lead (Pb) to nitrifying microorganisms in soils determined by substrate-induced nitrification assay and prediction model

Zheng

Chen

et al. 2017

Journal of Integrative Agriculture

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Lead (Pb) contamination has often been recorded in Chinese field soils. In recent years, efforts have been made to investigate Pb toxicity thresholds in soils with plant growth and microbial assays. However, the influence of soil properties on Pb toxicity impacts on soil microbial processes is poorly understood. In this study ten soils with different properties were collected in China to investigate the relationships between thresholds of Pb toxicity to soil microbes and soil properties. The effect of soil leaching on Pb toxicity was also investigated to determine the possible influence of added anions on Pb toxicity during dose-response tests. Toxicity was inferred by measuring substrate-induced nitrification in leached and non-leached soils after Pb addition. We found that soil microbe Pb toxicity thresholds (EC x , x=10, 50) differed significantly between the soils; the 10% inhibition ratio values (EC 10) ranged from 86 to 218 mg kg-1 in non-leached soils and from 101 to 313 mg kg-1 in leached soils. The 50% inhibition ratio values (EC 50) ranged from 403 to 969 mg kg-1 in non-leached soils and from 494 to 1 603 mg kg-1 in leached soils. Soil leaching increased EC 10 and EC 50 values by an average leaching factor (LF) of 1.46 and 1.33, respectively. Stepwise multiple regression models predicting Pb toxicity to soil microbes were developed based on EC x and soil properties. Based on these models, soil pH and organic carbon are the most important soil properties affecting Pb toxicity thresholds (R 2 >0.60). The quantitative relationship between Pb toxicity and soil properties will be helpful for developing soil-specific guidance on Pb toxicity thresholds in Chinese field soils.

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“…Three soil samples were selected for this study: 1 soil polluted in situ, consisting of the surface layer (uppermost 20 cm) of an eutric Regosol affected by residual pollution after the Aznalcóllar mine spill [43] and located in the Guadiamar Green Corridor (AZN); and 2 ex situ (spiked) soils, 1 sampled from the C horizon of a calcaric Kastanozem (SC), and another from a C horizon of a leptic Regosol (SNC), both samples were selected by their contrasting properties and were described in Romero-Freire et al [44]. In all cases, soil samples were obtained from composite subsamples of the same horizon and thoroughly homogenized before the analysis.…”

Section: Soil Samplesmentioning

confidence: 99%

Arsenic Fixation in Polluted Soils by Peat Applications

et al. 2020

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Soil arsenic (As) pollution is still a major concern due to its high toxicity and carcinogenicity, thus, the study of decontamination techniques, as the organic amendment applications, keeps upgrading. This research evaluates the potential remediation of peat in different As-polluted soils, by assessing the decrease of As solubility and its toxicity through bioassays. Obtained reduction in As solubility by peat addition was strongly related to the increase of humic substances, providing colloids that allow the complexation of As compounds. Calcareous soils have been the least effective at buffering As pollution, with higher As concentrations and worse biological response (lower soil respiration and inhibition of lettuce germination). Non-calcareous soils showed lower As concentrations due to the higher iron content, which promotes As fixation. Although in both cases, peat addition improves the biological response, it also showed negative effects, hypothetically due to peat containing toxic polyphenolic compounds, which in the presence of carbonates appears to be concealed. Both peat dose tested (2% and 5%) decreased drastically As mobility; however, for calcareous soils, as there is no phytotoxic effect, the 5% dose is the most recommended; while for non-calcareous soils the efficient peat dose for As decontamination could be lower.

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Effect of soil properties on the toxicity of Pb: Assessment of the appropriateness of guideline values

Cited by 73 publications

References 57 publications

Effect of soil properties on Pb bioavailability and toxicity to the soil invertebrate Enchytraeus crypticus

Effect of soil properties on Pb bioavailability and toxicity to the soil invertebrate Enchytraeus crypticus

Toxicity threshold of lead (Pb) to nitrifying microorganisms in soils determined by substrate-induced nitrification assay and prediction model

Arsenic Fixation in Polluted Soils by Peat Applications

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