Carbonate Calcium Equilibrium in Soil Solution as a Driver of Heavy Metals Mobility

doi:10.13187/ijep.2015.2.136

Cited by 3 publications

(14 citation statements)

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“…In our opinion, this reason is incorrect both based on the long-term field experiments worldwide and concerning the results presented in this paper, as well as our former publications. 1,3,35,37,45,46 High environmental quality of the biological production grown after phosphogypsum application to soil was shown both for HM-contaminated and HM-lowcontaminated phosphogypsum. 4,45,47 CCE and ion association in soil solution cause passivation of HMs for 14.5−21.5 times compared to HM water-soluble values (Table 4).…”

Section: Introductionmentioning

confidence: 99%

“…Ion activity in soil solution depends on ionic strength, ion association, and ion complexation. 1 Increased content of contaminants of natural and technogenic origin in the ecosphere at standard phosphogypsum waste utilization requires new waste recycling methods combined with soil mechanical processing and amendment application. The intrasoil passivation of dangerous substances is to be provided.…”

Section: Introductionmentioning

confidence: 99%

“…Accounting soil solution CCE, the molar fraction of active Pb 2+ in soil solution does not exceed 0.13%, and the Pb 2+ activity in the water extract is about 0.24% of the Pb total content. 1 Phosphogypsum is a byproduct of wet phosphorus fertilizer technology. Total phosphogypsum production in the world is about 150−280 t year −1 .…”

Section: Introductionmentioning

confidence: 99%

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Chemical Soil-Biological Engineering Theoretical Foundations, Technical Means, and Technology for Safe Intrasoil Waste Recycling and Long-Term Higher Soil Productivity

et al. 2020

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The amelioration and remediation technology was developed on the basis of research of phosphogypsum and utilization in the Haplic Chernozem of South-European facies (Rostov Region). Phosphogypsum was utilized via dispersed application into a soil layer of 20–45 cm with intrasoil milling of this layer. The phosphogypsum utilization doses were 0, 10, 20, and 40 t ha –1 . The Pb analytical content in soil solution was studied in the model experiment. The soil solution Pb thermodynamic forms were calculated. The mathematical chemical–thermodynamic model ION-2 was developed to calculate the real soil solution (water extract) calcium-carbonate equilibrium (CCE) ion forms, considering the ion pair association. The associated ion pairs CaCO 3 0 , CaSO 4 0 , MgCO 3 0 , MgSO 4 0 , CaHCO 3 + , MgHCO 3 + , NaCO 3 – , NaSO 4 – , CaOH + , and MgOH + were accounted for in soil solution equilibrium macroion form calculation. The procedure for the microelement ion [including heavy metals (HMs)] equilibrium concentration in the soil solution coefficient k as calculation was proposed to account for the real soil solution CCE, macroions, and HM (including Pb) association. The Pb 2+ ion in soil solution was mostly bound to associates PbOH + , Pb(OH) 2 0 , PbCO 3 0 , Pb(CO 3 ) 2 2– , and PbHCO 3 + . The calculation of CCE and ion association in soil solution revealed 14.5–21.5 times HM passivation compared to HM water-soluble values. The calculated HM activity in the soil solution in the example of the Pb 2+ ion was less than 4% after phosphogypsum application in the target amelioration layer of 20–45 cm. The studied phosphogypsum doses were substantiated as environmentally safe. This was because the real soil solution CCE provided HM ion form association and consequent passivation. The dry steppe soil remediation after phosphogypsum application was justified as highly probable. The intrasoil milling chemical soil-biological engineering technology was developed for simultaneous soil amelioration and remediation on the basis of the biogeosystem technique (BGT*) transcendental methodology. The BGT*-based technology was tested in the long-term field experiments and is capable of ensuring the priority geophysical micro- and macroaggregate structure via intrasoil milling and mixing of soil illuvial and transitional horizons. This helps synthesize soil multilevel architecture, providing intrasoil-dispersed environm...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical Soil-Biological Engineering Theoretical Foundations, Technical Means, and Technology for Safe Intrasoil Waste Recycling and Long-Term Higher Soil Productivity

et al. 2020

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“…), 1987;Марчук, 1982;Кремер, Морозов, 1988;Сурмин, 2003;Новосельцев (ред. ), 2006;Franklin et al, 2014;Lurgi et al, 2015;Batukaev et al, 2016;Donatelli et al, 2017;Okamato et al, 2018;Amuti et al, 2018). В зависимости от формы реализации математические модели можно разделить на имитационные и аналитические (Сельскохозяйственная радиоэкология, 1992;Новожилов, Семенова, Петрова, 1999;Семенова и др., 2003;Boulangeat et al, 2014;Donatelli et al, 2017;.…”

Section: Introductionunclassified

Conceptual and Mathematical Statement of the Process of Heavy Metals Migration in the System «Soil – Agricultural Plant»

2018

Biogeosystem Technique

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The mathematical modeling was used to describe the functioning and organization of natural ecosystems as well as various approaches to the classification of environmental models to describe both the individual processes and their interactions on the base of the real system patterns. Using the system analysis, the components of the system «soil-agricultural plant» are identified and analyzed separately interconnected by bilateral cause-effect relationships. It was shown that the origin of the studied system is artificial, while specific of the components is material. By the nature of interaction with the environment it is an open system, the sequence of events in which is not deterministic and is probabilistic. In developing the conceptual model of heavy metal migration in the system «soil-agricultural plant», a number of assumptions were made: the main mechanism of heavy metals input into crops is the root one; the process of chemical element transfer between the components of the system can occur in forward and reverse directions; in the processes of migration between the components of ecosystems, the transit of heavy metals can take place; the foliar flow of heavy metals is taken into account, mediated, in the transfer constants from the soil to the above-ground phytomass of crops; it is assumed that the investigated chemical element is isolated from the parts of plants into the soil. The accepted limitation in the development of the conceptual model of the TM migration process in the system «soil-agricultural plant» is the formalization of the initial information to quantifiable indicators. Based on the results of the system analysis, adopted approaches and assumptions, a conceptual model of TM migration in the system of «soil-agricultural plants» is developed, with the allocation of the main blocks (compartment): arable soil layer (0-30 cm), aerial phytomass of plants, the root system of plants (root and tuber fields), the subsurface layer of the soil. Mathematical description of the dynamics of migration of chemical elements between the individual components of the studied system «soil-agricultural plant» is presented by a system of linear differential equations of 1 st order. The process of migration between the compartments are determined by the constants of transfer of a chemical elements, based on literature data and average values of coefficients of accumulation of Zn, cu, Pb, Cd in the most common crops.

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“…CCE provides understanding of key biogeochemical element cycles (Müller et al, 2014), ecosystem state and management (Endovitsky et al, 2015a;Starcev Viktor and Kalinichenko, 2015).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Model of Calcium Carbonate System of Soil Solution

Batukaev¹,

Endovitsky²,

Andreev³

et al. 2016

American Journal of Agricultural and Biological Sciences

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Carbonate system determines the basic processes of soil formation and evolution. The aim of research was to show the importance of chemical Carbonate Calcium Equilibrium (CCE) in soil solutions. CCE causes a degree of soil solution's saturation with CaCO 3 as a factor of carbonate geochemical cycle. CCE depends on chemical composition, pH, Eh, buffering properties of liquid phase, dissolution, migration, precipitation of carbonates in the soil profile and landscape, ion exchange processes at the interface of soil solid and liquid phases. At high ionic force in soil solution are formed electrically neutral ion pairs СаСО 3 0 ; CaSO 4 0 , MgCO 3 0 , MgSO 4 0 and charged ion pairs CaHCO 3

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Carbonate Calcium Equilibrium in Soil Solution as a Driver of Heavy Metals Mobility

Cited by 3 publications

References 26 publications

Chemical Soil-Biological Engineering Theoretical Foundations, Technical Means, and Technology for Safe Intrasoil Waste Recycling and Long-Term Higher Soil Productivity

Chemical Soil-Biological Engineering Theoretical Foundations, Technical Means, and Technology for Safe Intrasoil Waste Recycling and Long-Term Higher Soil Productivity

Conceptual and Mathematical Statement of the Process of Heavy Metals Migration in the System «Soil – Agricultural Plant»

Thermodynamic Model of Calcium Carbonate System of Soil Solution

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