Cobalt in soils and plants of the Selenga River delta

Sosorova, S. B.

doi:10.1134/s1064229309070059

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…The chromium content is also lower than the clarke but higher in saz soils than in takyr ones. According to some reports, chromium accumulation in soils may be associated with alluvial deposits and river waters [44], which is quite possible in the Fergana Valley. Mobility of cobalt increases in wet soils, in connection with what is the possible removal of this element in irrigation; in any case, its accumulation is at a level two times lower than clarke [45].…”

Section: Resultsmentioning

confidence: 99%

“…According to some reports, chromium accumulation in soils may be associated with alluvial deposits and river waters [44], which is quite possible in the Fergana Valley. Mobility of cobalt increases in wet soils, in connection with what is the possible removal of this element in irrigation; in any case, its accumulation is at a level two times lower than clarke [45]. Accumulation of nickel above the clarke occurs in saz soils, it does not occur in takyr soils.…”

Section: Resultsmentioning

confidence: 99%

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Biogeochemical State of Salinized Irrigated Soils of Central Fergana (Uzbekistan, Central Asia)

Turdaliev,

Askarov,

Abakumov

et al. 2023

Applied Sciences

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The Central Fergana region is one of the overpopulated regions of Central Asia, which includes parts of Uzbekistan, Kyrgyzstan, and Tajikistan. Here, in the dry subtropical climate are the most ancient, irrigated oases used for agriculture. Fergana valley is the key to the food security of the region as a whole. The article provides information on diversity and chemical composition of newly developed, new and old-irrigated Calcisols soils formed on alluvial and alluvial–prolluvial sediments. Soils are poor with organic matter (0.37–0.81% of organic carbon), with high nitrogen content (C/N ratio is 4.92–5.79), and with neutral (7.01–7.30) pH values. Data on the content and the ratio of the key components of soil salinity (Na2CO3, Ca(HCO3)2, CaSO4, MgSO4, Na2SO4, NaCl) and the bulk content of salts in soils under different irrigation regimes are presented. It was shown that Na2CO3 concentration is minimal in all the soils, and this salt presents only in ground waters (0.100–0.135 g L−1). Newly irrigated soils are characterized by higher content of salts than old irrigated soils. All the soils investigated are characterized by increasing salinity rate within the soil depth with the highest content of all salts in ground waters. This chloride–sulfate type of salinization is most pronounced in all the soils studied. Gypsum content in agricultural soils results in limited water and nutrient retention and the potential for dissolution, primarily in response to irrigation. The soils of the Fergana Valley are also subjected to polychemical pollution, so the content of trace elements in them was studied. Irrigated meadow-takyr and meadow-saz soils show low levels of environmental hazard, but irrigation results in accumulation of such trace elements as nickel (30 mg kg−1), arsenic (11.75 mg kg−1), bromine (5.00 mg kg−1), antimony (1.48 mg kg−1), cesium (5.00 mg kg−1), and hafnium (2.97 mg kg−1). Irrigation also affects the soil texture and thus increases fine particle percentages in the superficial soil horizons. Thus, the complex chemical characteristics of salinized soils are presented for numerous irrigated landscapes of the region.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Biogeochemical State of Salinized Irrigated Soils of Central Fergana (Uzbekistan, Central Asia)

Turdaliev,

Askarov,

Abakumov

et al. 2023

Applied Sciences

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“…synthesis of proteins and enzymes [16]. It can be seen that the absorption, migration and transformation of Co in the process of plant growth, and that the Co content of wetland soil can reflect the supply of trace elements in the soil and its available level [17]. Both Co and Sb can accumulate in the ecosystem through the food chain [18] -directly or indirectly affecting the survival and reproduction of wetland organisms, but these two metal elements are rarely involved in previous studies.…”

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confidence: 99%

Speciation and Ecological Risks of Cobalt and Antimony in Black-Necked Crane (<i>Grus nigricollis</i>) Habitat Sediments in China’s Caohai Lake

Xia¹,

Lin²,

Huang³

et al. 2020

Pol. J. Environ. Stud.

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The potential ecological risks of cobalt (Co) and (Sb) in the sediments of the black-necked crane habitats in Caohai Lake, Guizhou Province were assessed based on total concentration and speciation via Tessier sequential extraction procedure. The results showed that the concentration of Co in the study region is in the range of 4.29-23.79 mg•kg-1 , with an average of 15.41±3.4 mg•kg-1 , which is lower than the soil background concentration in Guizhou Province. The concentration of Sb is in the range of 1.4-1.69 mg•kg-1 , with an average of 1.51±0.3 mg•kg-1 , which is 13.7 times higher than the soil background value of Sb in Guizhou Province. The concentrations of Sb in the west and southeast regions were greater than those in the other parts of the habitats. Co mainly existed in residual and Fe-Mn oxides forms, which account for 68.73-89.14% of total Co. However, Sb mainly existed in residual forms, which account for 79.84-93.11% of the total Sb. The carbonate and organic forms of the two elements and the Fe-Mn oxides of Sb decreased along with decreased water depth. The exchangeable fractions of the two elements were lower than 1% and do not exhibit obvious changes with water depth. The potential ecological risk index of Co (E Co) shows that Co in the five habitats (Liujiaxiang, Zhujiawan, Wangjiayuanzi, Huyelin, and Yangguanshan) was at a moderate risk level. The potential ecological risk index of Sb (E Sb) shows that Sb in the five habitats was at a considerable risk level. All of the RI indexes were at mild and moderate risk levels, which Sb makes a large contributor. According to an assessment of the ratio of the secondary phase to the primary phase, Co and Sb present little pollution and potential ecological risk in the study regions. It can be seen that the evaluation of the ecological impact by the total

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Cobalt in soils and plants of the Selenga River delta

Cited by 2 publications

References 2 publications

Biogeochemical State of Salinized Irrigated Soils of Central Fergana (Uzbekistan, Central Asia)

Biogeochemical State of Salinized Irrigated Soils of Central Fergana (Uzbekistan, Central Asia)

Speciation and Ecological Risks of Cobalt and Antimony in Black-Necked Crane (<i>Grus nigricollis</i>) Habitat Sediments in China’s Caohai Lake

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