Bioavailability and soil-to-plant transfer factors as indicators of potentially toxic element contamination in agricultural soils

Adamo, Paola; Iavazzo, Pietro; Albanese, Stefano; Agrelli, Diana; Vivo, Benedetto De; Lima, Annamaria

doi:10.1016/j.scitotenv.2014.08.085

Cited by 139 publications

(49 citation statements)

References 38 publications

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“…The TF values appear highly variable for most of the plant categories, but this is not surprising because the TF values are soil and plant‐specific ( Smolders , ; Mirecki et al, ). Furthermore, the TF values are not constant for any concentration of element in soil, but, as already reported in literature ( Adamo et al, ; Mirecki et al, ), decrease as the element concentration in soil increases (data not shown). In our study there is no clear trend of TF values for the plant categories.…”

Section: Resultssupporting

confidence: 91%

Soil versus plant as indicators of agroecosystem pollution by potentially toxic elements

Agrelli

Adamo

Cirillo

et al. 2017

J. Plant Nutr. Soil Sci.

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The major route of potentially toxic elements (PTEs) to humans is the intake through food. They enter the food chain principally by plants uptake from the soil and, to a less extent, through foliar deposition. The soil‐to‐plant transfer as part of the biogeochemical cycle of these elements is a complex and hardly predictable process. In this study, we investigated the capability of soils and plants to indicate PTEs inputs in an intermingled urban‐rural landscape of south Italy affected by legal and illegal waste disposal and dumping. For this aim, 172 agricultural soil and plant (edible part) samples were collected in pairs from 47 municipalities and analyzed for 12 PTEs (As, Be, Cd, Co, Cu, Cr, Ni, Pb, Se, Tl, V, Zn). Soil extractions with 1 M NH4NO3 and 0.05 M EDTA pH 7 were applied to assess PTEs bioavailability. Results were examined according to plant species and main soil chemical properties. For Pb and Cd, the soil‐to‐plant transfer factors (TF) and the corresponding soil benchmark concentrations were also investigated. Zinc, Cu, Cd, and Pb were the only PTEs of anthropic origin severely polluting from 10 to 16% of the soils, but only in a very few cases exceeded physiological or EU legal critical values in the edible part of the plants. An evaluation of human risk due to the ingestion of these elements was tried; no risk for consumers for Zn, Cu, and Pb, while for Cd three values slightly exceeded the tolerable daily intake. Therefore, we conclude that crops cultivated in the studied area could represent only a moderate risk for human health. No correlation was found between soil and plant data, which likely highlights different pollution inputs. A large variability characterized the Pb and Cd TF, making it difficult to establish a unique benchmark concentration for the studied agricultural soils.

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Section: Resultssupporting

confidence: 91%

Soil versus plant as indicators of agroecosystem pollution by potentially toxic elements

Agrelli

Adamo

Cirillo

et al. 2017

J. Plant Nutr. Soil Sci.

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“…It has been shown that metals with anthropogenic sources were mainly associated with residual, oxidizable and reducible phases which are relatively immobile and only potentially bioavailable to plants. However, micronutrients such as Zn and Cu showed a tendency to become more readily mobile and bioavailable as their total content in soil increased and were more easily transported to the edible parts of lettuce than other pollutants [54].…”

Section: Fractionation Of Heavy Metal (Loid)s In Agricultural Soils;mentioning

confidence: 99%

Metal (Loid)s in Farmland Soils and Strategies to Reduce Bioavailability

Fayiga¹,

Nwoke²

2017

Open J Environ Biol

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High concentrations of heavy metal (loid)s (HMs) in farmland soils reduces crop yield and contaminates the food chain. Exposure to HMs in the diet results in several adverse health effects such as cancer, reproductive health problems and cardiovascular diseases. Understanding the origin and fractionation of these toxic substances will provide direction for reducing their bioavailability in contaminated farmland soils. HMs are added to farmland soils through activities such as irrigation, organic and inorganic fertilization, pest control, and mining. Weathering of parent material and atmospheric deposition can also increase the levels of HMs in the soil. Fractionation of HM contaminated soils provides information on availability of HMs such as Pb, Cd, As, Cr and Cu to soil biota and plants. Several studies have reported that Pb is mostly associated with Fe and manganese oxides (reducible fraction) while Cd is mostly associated with the most mobile fraction (exchangeable fraction). The application of organic and inorganic soil amendments such as vermiculite, zeolite, composts and crop residue to contaminated farmland soils converts HMs from the plant available fractions to the less mobile fractions. HM resistant microbes can change HMs to a less mobile fraction or less mobile oxidation state. The combination of HM resistant microbes, HM tolerant plants, and soil amendments can be used to reduce mobility of HMs in contaminated farmlands. Capsule:The mobility of heavy metal (loid)s in polluted farmland soils depends strongly on its association with soil components.

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“…The soil Cd pollution in agricultural lands poses a serious threat to food safety and highlights the need for advisory indications for soil management and crop production (Adamo et al, 2014). The soil‐to‐plant transfer is a key component of the assessment of human exposure to Cd through the food chain.…”

Section: Discussionmentioning

confidence: 99%

Establishment of a Model to Assess Soil Cadmium Uptake by Brassica Chinensis

Dai

Nasir

Yu-lin

et al. 2019

Soil Science Soc of Amer J

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Cadmium uptake by Brassica chinensis was positively related with soil Cd content. Soil pH and OC acted as dominant factors regulating Cd uptake in Brassica chinensis. The log‐transformed data was more appropriate in establishing the regress equations. The predication model was best established combining with soil pH and OC. Estimating cadmium (Cd) bioavailability and transfer to plants are important for food safety. We aimed to determine the dominant soil factors regulating the transfer of Cd from a wide variety of Chinese soils to Pak Choi (Brassica chinensis) and to establish a model for prediction of Cd uptake in B. chinensis. A greenhouse experiment was conducted in which B. chinensis plants were grown under 14‐h 20°C light/10‐h 16°C dark photoperiod for 60 d. The total Cd content in the plant and soil samples was measured. The Cd concentration in B. chinensis was positively correlated to the soil Cd concentration, and negatively correlated to the soil pH and soil organic carbon (SOC) content. The bio‐concentration factors (BCF) measured in acidic soils (the maximum value being 0.551) were higher than those in alkaline soils (the maximum value being 0.366). Multivariable (pH, SOC, and total soil Cd) regression analysis could estimate the Cd bioavailability more accurately compared with the single‐factor (total soil Cd) analysis. The most accurate Freundlich‐type equation (Log[Cplant] = 2.34Log[Csoil] – 0.27pH – 0.23Log[SOC] + 0.92) was developed to estimate the Cd bioavailability using combined data from all treatments. The model described by us would be useful for estimating the bioavailability of Cd to B. chinensis in a variety of soils and would be helpful in assessing the risk of Cd contamination in soils.

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Bioavailability and soil-to-plant transfer factors as indicators of potentially toxic element contamination in agricultural soils

Cited by 139 publications

References 38 publications

Soil versus plant as indicators of agroecosystem pollution by potentially toxic elements

Soil versus plant as indicators of agroecosystem pollution by potentially toxic elements

Metal (Loid)s in Farmland Soils and Strategies to Reduce Bioavailability

Establishment of a Model to Assess Soil Cadmium Uptake by Brassica Chinensis

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