Distribution of Cu, Ni, Zn, Mn, Cr, Cd, Pb, Co, Mo, As in alluvial soils of floodplain landscapes of the Sozh river basin

Q4 Agricultural and Biological Sciences
G. V. Chekin, A. L. Silaev, E. V. Smolsky
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Abstract

The studies were carried out in the western part of the Bryansk Region in the landscapes of the Sozh River basin (Iput’ River, tributary of the 1st order, south of the village of Perevoz; River Besed', tributary of the 1st order, northwest of the village of Baturovka; River Unecha, tributary 2nd order, west of the village of Lopatny). The aim of this work is to study the features of the vertical and horizontal distribution of the gross content of Cu, Ni, Zn, Mn, Cr, Cd, Pb, Co, Mo, As in the alluvial soils of floodplain landscapes. The selection of soil samples for the determination of the gross content of trace elements was carried out in subsystems of the floodplain landscape, different in geomorphology and hydrology, by the method of soil springs. Each key soil plot was a full-profile soil pit and four reconnaissance pits. Samples were taken from the walls of the cuts every 5 cm, mixed and averaged by the quartering method. The gross content of trace elements was determined by the atomic absorption method, after preliminary decomposition of the samples with a mixture of concentrated nitric and hydrofluoric acids using a microwave system. Variations in the content of trace elements in the layers of alluvial soils were assessed using the coefficient of variation. To characterize the degree of concentration or dispersion of trace elements in soils, the concentration clarke was calculated. As a result of the research, it was found that the vertical distribution of trace elements in the 0–20 cm layer is determined by their chemical properties and the genesis of the soils of the floodplain subsystems, and can be uniform, decreasing/increasing with depth or with concentration in separate layers. Clarke concentrations of microelements and their content increase in the direction from the riverbed to the near-terrace subsystem of the floodplain. Concentrations of elements in the soils of floodplain landscapes do not exceed the clarke value. The exceptions are Cr, Zn and Cu in the soil of the near-terrace subsystem of the river Unecha, Cd – in the soil of the central subsystem of the river Besed’, as well as Cu and Cd – in the soil of the near-terrace subsystem of the river Besed’. An excess of the clarke value for some elements may indicate their anthropogenic origin.
苏日河流域冲积土中Cu、Ni、Zn、Mn、Cr、Cd、Pb、Co、Mo、As的分布
这些研究是在布良斯克地区西部的Sozh河流域(Iput ' River,一级支流,Perevoz村南部;比塞德河,一级支流,巴图罗夫卡村西北;乌内查河,二级支流,洛帕特尼村以西)。本文旨在研究洪泛平原冲积土中Cu、Ni、Zn、Mn、Cr、Cd、Pb、Co、Mo、As总含量的纵横分布特征。采用土壤泉法,在不同地貌和水文的洪泛平原景观子系统中进行了土壤样品的选择,测定了微量元素总量。每个关键土样为1个全剖面土坑和4个侦察坑。每隔5厘米从切口壁上取一次样品,用四分法混合并取平均值。样品经浓硝酸和氢氟酸的混合物在微波系统中初步分解后,用原子吸收法测定了微量元素的总含量。利用变异系数对冲积土各层微量元素含量的变化进行了评价。为了表征土壤中微量元素的集中或分散程度,计算了浓度克拉克。研究结果表明:0 ~ 20 cm土层中微量元素的垂直分布由其化学性质和河漫滩各子系统土壤的成因决定,在不同的土层中,微量元素的垂直分布可以是均匀的,随深度或随浓度的增加而减少或增加。微量元素克拉克浓度及其含量沿河漫滩近阶地子系统向河床方向增加。洪泛区土壤中元素的浓度不超过克拉克值。除了乌内恰河近阶地分系统土壤中的Cr、Zn和Cu,贝赛德河中央分系统土壤中的Cd -,以及贝赛德河近阶地分系统土壤中的Cu和Cd -。某些元素的克拉克值的超出可能表明它们的人为起源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
15
审稿时长
8 weeks
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