A Study of the Zinc Lability and Bioavailability in Soil Using 65Zn in a Vegetation Lysimetric Experiment

Anisimov, V. S.; Anisimova, L. N.; Санжаров, А. И.; Frigidov, R. A.; Dikarev, D. V.; Korneev, Yu. N.; Коровин, С. В.; Sarukhanov, A. V.; Thomson, A. V.

doi:10.1134/s1064229322040032

Cited by 3 publications

(7 citation statements)

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“…Thus, through the liquid phase, Cd/ 109 Cd are exchanged between competing binding sites which form respective (fraction-specific) compounds with cadmium ions in the solid phase of soils. The theoretical aspects of the process of ideal isotope exchange for different isotopes of an HM in the soil–soil solution system that introduce the mechanism of transformation of the forms of this particular HM in the soil are discussed in detail in the works of Anisimov et al [ 39 , 40 ].…”

Section: Discussionmentioning

confidence: 99%

“…The flow-through lysimeter was covered with a non-hermetic plexiglass lid with a built-in water-sprinkling device ( Figure 2 a). The detailed designs of various modifications of the vegetation stand are given in [ 39 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

“…The soil suspension was thoroughly mixed, and nutrients (N, K) were applied in the form of aqueous solutions of salts (NH 4 NO 3 , and KNO 3 ) in the doses recommended during such experiments (N 100 , K 100 ). Phosphorus was not applied because its content in the soil was sufficient [ 40 , 47 ]. Next, the soil was dried to an air-dry state, ground and sieved through a 2 mm sieve, then placed in a lysimeter installation, with alternating vertical layers of prepared soil and washed quartz fine–grained (0.4–0.8 mm) sand which acted as a drainage ( Figure 2 b).…”

Section: Methodsmentioning

confidence: 99%

“…Two weeks before the start of the vegetation experiment, a vegetation stand was assembled ( Figure 2 a), including a lysimeter, vegetation vessels, buffer tank, peristaltic pump, filter and connecting hoses (the scheme of the vegetation stand is given in [ 39 , 40 ]. The amount of water in the system was brought to a working volume of 6.0 dm 3 , and a peristaltic pump was started and left in operation for 2 weeks to achieve equilibrium in the system.…”

Section: Methodsmentioning

confidence: 99%

“…Immediately after the end of the vegetation experiment, the forms of Cd ( 109 Cd) associated with various organo-mineral components of soils were determined by the sequential chemical fractionation procedure according to Tessier in the Förstner modification [ 7 , 8 , 40 ], in soil samples taken directly from the lysimeter in 3 replicates. The following forms were identified: fraction I (F I )—exchangeable (extracted by 1M CH 3 COONH 4 , pH 7.0 (AAB-7.0); fraction II (F II ), which was actually mobile and carbonate bound (extracted with 1M CH 3 COONa (pH 5.0); fraction III (F III ), which was associated with easily reducible Mn (partially Fe) oxides (extracted with 0.1 M NH 2 OH-HCl in 0.01 M HNO 3 ); fraction IV (F IV ), which was associated with moderately reducible Fe oxides (extracted with 0.1 M H 2 C 2 O 4 +(NH 4 ) 2 C 2 O 4 buffer solution at pH 3.2–3.3); fraction V (F V ), which was bound to oxidizable organic matter and sulfides (extracted with 1M CH 3 COONH 4 + 6% HNO 3 after pretreatment twice with a solution of 0.02 M HNO 3 + 30% H 2 O 2 (v:v=3:5), pH 2; fraction VI (F VI ), which was bound to the crystal matrix of primary and secondary soil minerals (extracted with hot reagent water after pretreatment with HNO 3 (conc.)…”

Section: Methodsmentioning

confidence: 99%

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A Study on the Behavior of Cadmium in the Soil Solution–Plant System by the Lysimeter Method Using the 109Cd Radioactive Tracer

Anisimov

Anisimova

Krylenkin

et al. 2023

Plants

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In soils, cadmium (Cd) and its compounds, originating from industrial activities, differ both in mobility as well as in their ability to permeate the soil solution from naturally occurring cadmium compounds (native Cd). Therefore, the determination of the parameters of cadmium mobility in soils and its accumulation by plants in the soil–soil solution–plant system is very important from both scientific and practical viewpoints. 109Cd was used as a radioactive tracer to study the processes of the transition of Cd into the aqueous phase and its uptake by plants over the course of a vegetative lysimeter experiment. Using sequential extraction according to the Tessier–Förstner procedure and modified BCR schemes, certain patterns were determined in the distribution of Cd/109Cd among their forms in various compounds in the soil, along with the coefficients of the enrichment of native stable Cd with radioactive 109Cd. It was shown that the labile pool of stable Cd compounds (29%) was significantly smaller than that of radioactive 109Cd (69%). The key parameters characterizing the migration capacity of Cd in the soil–soil solution–plant system were determined. It was found that the distribution coefficient of native Cd between the soil and the quasi-equilibrium lysimeter solution exceeded the similar value for the 109Cd radionuclide by 2.2 times, and the concentration coefficients of Cd and 109Cd in the barley roots were 9 times higher than in its vegetative parts. During the experiment, the average removal of Cd (109Cd) from the soil by each barley plant was insignificant: 0.002 (0.004)%. Based on the results of 13C nuclear magnetic resonance (NMR) spectroscopy of a lyophilized sample of the high-molecular-weight dissolved organic matter (HMWDOM) of the soil solution, its components were determined. It transpired that the isolated lyophilized samples of HMWDOM with different molecular weights had an identical structural and functional composition. The selective sorption parameters of the HMWDOM and humic acid (HA) with respect to Cd2+ ions were determined by the isotope dilution method.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%