Method for reconstructing the initial baseline relationship between potentially harmful element and conservative element concentrations in urban puddle sediment

Seleznev, Andrian A.; Yarmoshenko, Ilia V.; Sergeev, Alexander

doi:10.1016/j.geoderma.2018.04.003

Cited by 18 publications

(18 citation statements)

References 27 publications

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“…Surface deposited sediment is often used as an indicator in urban geochemical studies [15][16][17][18][19] . Sediments are lithologically and geochemically associated with the territory of the city, thus they reflect the geochemical conditions of the surrounding area.…”

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confidence: 99%

“…The sediment signs the pollution and its pathways in urban environment 20,21 . Assessing the IGB and subsequent changes of geochemical conditions in cities are important factors when conducting environmental geochemical studies in urban areas 19,22 .…”

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confidence: 99%

“…Earlier, an approach was proposed to reconstruct initial geochemical conditions in an urban area 19 which allow to assess the geochemical transformation of the urban environment quantitatively. The method was based on analyzing the relationship between PHE and conservative elements (CE) in the USDS.…”

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confidence: 99%

“…The method was based on analyzing the relationship between PHE and conservative elements (CE) in the USDS. The approach uses a linear weighted fitting of the PHE-CE relationship with lower weights assigned to more polluted samples 19 . Strong mineralogical reasons of the linear regression between concentrations of two elements in soils and sediment samples were suggested by Van der Veer 23 .…”

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confidence: 99%

“…The cities were located in different geographic and climatic zones and included territories with different geology and anthropogenic pressures. The aims of the current study were to (i) reconstruct the initial baseline relationship between PHEs and the CE concentrations in USDS for each city with the approach suggested by Seleznev et al 19 , (ii) assess the degree of pollution and the degree of geochemical changes in the cities, and (iii) rank the cities by the degree of pollution and the degree of geochemical transformation.…”

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Urban geochemical changes and pollution with potentially harmful elements in seven Russian cities

Seleznev

Yarmoshenko

Malinovsky

2020

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This paper presents results of an analysis of potentially harmful elements (PHEs, Pb, Zn and Cu) and conservative element (CE, Fe) concentrations in urban surface deposited sediment (USDS). The study was conducted in seven large Russian cities located in different geographic and climatic zones, and in territories with different geology and anthropogenic pressures: Chelyabinsk, Magnitogorsk, Nizhniy Novgorod, Nizhniy Tagil, Rostov-on-Don, Tyumen, and Ufa. The initial geochemical baseline relationships between PHEs and CE concentrations in the USDS were reconstructed for each city applying an approach based on linear weighted fitting of PHE as a function of CE with lower weights assigned to more polluted samples. The reconstructed average initial baseline Pb, Cu, and Zn concentrations varied between 17-52, 25-196, and 91-413 mg kg −1 , respectively. Several new criteria for assessing the degree of geochemical transformation and pollution of the urban environment, such as the percentage of polluted samples, average pollutant concentration in polluted samples, and weighting degree index δ, were suggested and compared with common criteria, such as the PHE concentration and the geo-accumulation index. The environmental rank of a city significantly differed depending on whether the criterion for ranking was total pHe pollution or changes in comparison with the initial geochemical baseline. An urban landscape is an environment formed as an upper geological strata of the Anthropocene 1,2. The content of elements in environmental compartments in an urban area changes as a result of anthropogenic activities during landscape forming. The transformation of geochemical conditions in an urban area is a permanent environmental process governed by natural and artificial components. The content of elements in compartments of the urban environment at some initial moment, that either existed in reality or is assumed, before artificial and natural components of the environment were subject to any anthropogenic impact after creation of the landscape, is considered as initial geochemical baseline (IGB) conditions. Geochemical transformation and change of the IGB is a complex process affecting all components of the urban environment 3. The primary driving forces of the geochemical transformation include pollution of the environmental compartments by point and nonpoint sources 4 and erosion and degradation of the environmental compartments as a result of natural and anthropogenic impacts 5. Geochemical transformation in the urban environment consists of altering mineral and elemental composition, modification of physicochemical properties of the urban soil 6 , urban surface deposited sediment (USDS) formation, in particular road deposited sediment 4,5,7 , changes in volume of the surface stormwater runoff 8,9 , redistribution of pollutants 3,10 , and forming geochemical barriers 7 among others. USDS is an environmental compartment that is involved with the majority of geochemical transformation processes. In the urban environment, the ra...

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