Development and comparison of regression models for the uptake of metals into various field crops.

Field crops represent one of the highest contributions to dietary metal exposure. The aim of this study was to develop specific regression models for the uptake of metals into various field crops and to compare the usability of other available models. We analysed samples of potato, hop, maize, barley, wheat, rape seed, and grass from 66 agricultural sites. The influence of measured soil concentrations and soil factors (pH, organic carbon, content of silt and clay) on the plant concentrations of Cd, Cr, Cu, Mo, Ni, Pb and Zn was evaluated. Bioconcentration factors (BCF) and plant-specific metal models (PSMM) developed from multivariate regressions were calculated. The explained variability of the models was from 19 to 64% and correlations between measured and predicted concentrations were between 0.43 and 0.90. The developed hop and rapeseed models are new in this field. Available models from literature showed inaccurate results, except for Cd; the modelling efficiency was mostly around zero. The use of interaction terms between parameters can significantly improve plant-specific models.

[1]  K. Jones,et al.  Atmospheric deposition of metals to agricultural surfaces , 1992 .

[2]  M. Mozny,et al.  Influence of climate and land use change on spatially resolved volatilization of persistent organic pollutants (POPs) from background soils. , 2013, Environmental science & technology.

[3]  Bruno Ladeiro.  Saline agriculture in the 21st century: using salt contaminated resources to cope food requirements. , 2012 .

[4]  M. Oliver.  Soil and human health: a review , 1997 .

[5]  S. McGrath,et al.  Evaluating a ‘Free Ion Activity Model’ applied to metal uptake by Lolium perenne L. grown in contaminated soils. , 2005, Plant and Soil.

[6]  R. Avila,et al.  Plant uptake of elements in soil and pore water: field observations versus model assumptions. , 2013, Journal of environmental management.

[7]  Steve McGrath,et al.  Cadmium availability to wheat grain in soils treated with sewage sludge or metal salts. , 2007, Chemosphere.

[8]  C. Phillips,et al.  Empirical models of cadmium accumulation in maize, rye grass and soya bean plants , 2004 .

[9]  N. Crout,et al.  Modelling of Cd, Cu, Ni, Pb and Zn uptake, by winter wheat and forage maize, from a sewage disposal farm , 2003 .

[10]  A. Canada,et al.  Trace elements and public health. , 1985, Annual review of public health.

[11]  A. Ruttens,et al.  A dynamic model to calculate cadmium concentrations in bovine tissues from basic soil characteristics. , 2011, The Science of the total environment.

[12]  G. Genon,et al.  Long-Term Monitoring of a Lagooning Basin Used as Pretreatment Facility for a WTP: Effect on Water Quality and Description of Hydrological and Biological Cycles Using Chemometric Approaches , 2015, Water, Air, & Soil Pollution.

[13]  Jijun Li,et al.  Cadmium and zinc interactions and their transfer in soil-crop system under actual field conditions. , 2002, The Science of the total environment.

[14]  S. McGrath,et al.  Predicting cadmium concentrations in wheat and barley grain using soil properties. , 2004, Journal of environmental quality.

[15]  I. Thornton,et al.  Assessing potential risk of heavy metal exposure from consumption of home-produced vegetables by urban populations. , 2004, Environmental health perspectives.

[16]  D. Kastelec,et al.  Prediction of cadmium concentration in selected home-produced vegetables. , 2013, Ecotoxicology and environmental safety.

[17]  J. Nriagu,et al.  Chromium in the natural and human environments , 1988 .

[18]  Yong-guan Zhu,et al.  Health risks of heavy metals in contaminated soils and food crops irrigated with wastewater in Beijing, China. , 2008, Environmental pollution.

[19]  S. Guala,et al.  Heavy metal concentrations in plants and different harvestable parts: a soil-plant equilibrium model. , 2010, Environmental pollution.

[20]  Yang Liu,et al.  Human Exposure Pathways of Heavy Metals in a Lead-Zinc Mining Area, Jiangsu Province, China , 2012, PloS one.

[21]  S. Trapp,et al.  Comparison of prediction methods for the uptake of As, Cd and Pb in carrot and lettuce , 2010, SAR and QSAR in environmental research.

[22]  Domy C. Adriano,et al.  Trace Elements in Terrestrial Environments: Biogeochemistry, Bioavailability, and Risks of Metals , 2001 .

[23]  C. Micó,et al.  Heavy metal contents in horticultural crops of a representative area of the European Mediterranean region. , 2007, The Science of the total environment.

[24]  J. S. Lima.  Copper balances in cocoa agrarian ecosystems: effects of differential use of cupric fungicides , 1994 .

[25]  C. Reilly.  Metal contamination of food , 1980 .

[26]  B. J. Alloway,et al.  The Transfer of Cadmium from Agricultural Soils to the Human Food Chain , 1992 .

[27]  H. Oliveira.  Chromium as an Environmental Pollutant: Insights on Induced Plant Toxicity , 2012 .

[28]  A. Akay,et al.  Interaction between cadmium and zinc in barley ( Hordeum vulgare L.) grown under field conditions , 2008 .

[29]  Jian Long,et al.  Cross-Species Extrapolation of Prediction Model for Lead Transfer from Soil to Corn Grain under Stress of Exogenous Lead , 2014, PloS one.

[30]  Klára Komprdová,et al.  Impact of Floods and Their Frequency on Content and Distribution of Risk Elements in Alluvial Soils , 2015, Water, Air, & Soil Pollution.