The dynamics of heavy metals in plant–soil interactions

Guala, Sebastián; Vega, F.A.; Covelo, Emma F.

doi:10.1016/j.ecolmodel.2010.01.003

Cited by 128 publications

(82 citation statements)

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“…These include soil properties such as pH, organic matter (OM) content, redox potential, cation exchange capacity, sulfate, carbonate, hydroxide, soil texture and clay content (Prabpai et al, 2009;Guala et al, 2010). The pH and OM content are the major critical factors for heavy metal accumulation by both plants and animals (Li et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Bioavailability and leachability of heavy metals during water hyacinth composting

Singh

Kalamdhad

2013

Chemical Speciation & Bioavailability

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The bioavailability and leachability of heavy metals is important role when considering their toxicity during composting following land application. Therefore, studies were carried out on Zn, Cu, Mn, Fe, Ni, Pb, Cd and Cr during 30 days agitatedpile composting of water hyacinth (Eichhornia crassipes). This study investigated the influence of parameters such as pH, temperature and organic matter content on the distribution of heavy metal bioavailability and leachability during composting of water hyacinth. Results showed that the contents of total metal concentration increased during the composting process. The bioavailability of heavy metals was investigated in the form of water soluble and diethylene triamine pentaacetic acid (DTPA) extractable. In the water soluble, DTPA and leachable Zn, Cu, Mn, Ni and Cr reduced but there was a gradual increase in the Fe concentration during the composting process. Furthermore, in water soluble and leachable Ni, Cd and Pb were not detected and in DTPA extractable Cd and Pb were also not detected during 30 days of composting.

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Section: Introductionmentioning

confidence: 99%

Bioavailability and leachability of heavy metals during water hyacinth composting

Singh

Kalamdhad

2013

Chemical Speciation & Bioavailability

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“…The mathematical model is presented in [7]. The lot of the parameters used in the mathematical model of heavy metal transfer in the soil-plant interaction is given in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…The lot of the parameters used in the mathematical model of heavy metal transfer in the soil-plant interaction is given in Table 1. In order to mathematically model the dynamic interaction between aluminium mobility, given by the soil acidity, and plants, [7] uses a mathematical model proposed in [1] and modified in [2], given by the following equation system:…”

Section: Methodsmentioning

confidence: 99%

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Theoretical research on evolution of health of plants affected by heavy metal absorption process

Cârdei

Tudora

2018

Engineering for Rural Development

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Abstract. The paper presents a modified version of the mathematical model of the heavy metal transfer process. The changes start from the beliefs of the authors that the factors that govern the plant's evolution (germination, growth and vegetative development, senescence and death) are environmental factors (structure and chemical composition of soil and air, their humidity, soil pH, lighting, applied fertilization, meteorological events, etc.) and not the time. Time is an artificial parameter introduced to provide a simpler reporting of dynamic processes. We do not know if time has simplified, or if it kept the truth in reporting the results, but it is the most common parameter used for this purpose. Of the influential factors, only the temperature and the concentration of heavy metal ions in the soil are considered in this article. The paper presents simulations using minimal experimental data, model constants being obtained by calibration. Effects of increasing delay and triggering of the biomass descending process were achieved (phytoremediation also). The experiments required to increase the performance of the model, the theoretical and practical efficiency of such attempts are estimated. These appreciations allow readers to reflect, to try to estimate the theoretical and practical efficiency of such attempts.Keywords: plants, bioaccumulation, disease, models, simulation. IntroductionThe paper presents a modified version of the mathematical model of the heavy metal transfer process developed in [1] and [2]. Mathematical models of heavy metal bioaccumulation are often simplified as much as possible to make them more intuitive, but also because the simple model requires less experimental data. The process of bioaccumulation of heavy metals in plants is a very complex one, which influences the physiological processes: feeding, development, quantity and quality of accumulated biomass, life span, etc. For these reasons, in this paper we have opted for a slightly more complex bioaccumulation model than, for example, in [3]. In turn, this model has been modified by introducing the influence factors that reflect the impact of the environmental factors to the plant life. This approach is in line with the authors' belief that time is not the parameter that makes the plant to evolve, but the effective control factors for the system: temperature, illumination, soil pH or development environment, environmental conductivity, rainfall regime, fertilization, etc. The environmental or management command factors can be expressed through a product with the role of introducing energy into the plant's bio-system, in various forms, energy harnessed by the plant by growth, generally by evolution (vegetative development). Besides these factors, there are other environmental factors that also provide energy elements that are likely to be unsuitable for the biosystem and which lead to nutritional deficiencies leading to slowing growth, various diseases, etc.The mathematical modelling of bioaccumulation of heavy metals aims both to k...

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“…Direct impacts of SO 2 deposition on tree needles contributed to their deterioration, while soil acidification, together with other stressors, affected the growth of roots (Ulrich 1986;Markert et al 1996;Lorenz et al 2008). Several studies reported increased concentrations of some heavy metals in soils of the Karkonosze (Borkowski et al 1993;Drozd et al 1996;Szopka et al 2013) and supposed that heavy metals should be considered as highly disadvantageous components of pollution that affect biota, including plants, and destroy natural ecosystems (Salemaa et al 2001;Guala et al 2010;Chai et al 2014). Environmental pollution with heavy metals was therefore suggested to be an important factor of forest degradation in the Karkonosze.…”

Section: Introductionmentioning

confidence: 99%

The distribution of sequentially extracted Cu, Pb, and Zn fractions in Podzol profiles under dwarf pine of different stages of degradation in subalpine zone of Karkonosze Mts (central Europe)

et al. 2017

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Purpose Here, we aimed to assess the contamination of Podzol soils in a subalpine zone of the Karkonosze Mountains. Cu, Pb, and Zn concentrations in the soil and the patterns of their speciation are discussed in relation to the possible influence of airborne industrial emissions and the stage of degradation of dwarf mountain pine stands. Materials and methods The study was conducted in the Karkonosze, a mountain range in the Sudetes, on the boundary between Poland and the Czech Republic. We examined Podzols derived from granites under dwarf mountain pine stands at two stages of degradation (without visible degradation vs. dead). These two sites were 100 m apart, at an altitude of 1400 m above sea level (upper mountain forest zone). Soil samples were collected from all distinguished soil horizons and their basic soil properties and heavy metal (Cu, Pb, and Zn) concentrations (and their speciation) determined by sequential extraction according to the method of Zeien and Brümmer. Results and discussion The Cu concentrations in these soils were relatively low, typical for soils derived from granite and did not differ considerably within soil profiles. The residual Cu fraction was a predominant one in all mineral horizons.The Pb concentrations in the surface organic horizons were clearly higher than those in similar horizons of European lowland forest soils. This distribution of Pb in the mineral horizons was apparently associated with soil colloid distribution that developed in the process of podzolization, indicating the minimum concentrations in eluvial E horizons and enhanced concentrations in illuvial Bh horizons. The organically bound fraction made up about 40% of total Pb in the Bh horizons. Zn concentrations were highest in the deepest parts of the soil, where the predominant fraction was residual, while relatively high amounts of easily mobilizable Zn were present in ectohumus.Conclusions Very high concentrations of Pb in ectohumus have most likely been caused by a long-distance transport of anthropogenic emissions. The concentrations of Pb or other metals found in soils cannot be considered to have been the principal causes of the ecological disaster observed in the Karkonosze Mountains. The highest concentrations of Pb in ectohumus, as well as its high contributions in the organically bound fraction, confirm a crucial role of organic matter in Pb accumulation in soils.

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The dynamics of heavy metals in plant–soil interactions

Cited by 128 publications

References 31 publications

Bioavailability and leachability of heavy metals during water hyacinth composting

Bioavailability and leachability of heavy metals during water hyacinth composting

Theoretical research on evolution of health of plants affected by heavy metal absorption process

The distribution of sequentially extracted Cu, Pb, and Zn fractions in Podzol profiles under dwarf pine of different stages of degradation in subalpine zone of Karkonosze Mts (central Europe)

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