Assessment of bioavailability of some potential toxic metals in mining-affected soils using EDTA extraction and principle component analysis (PCA) approach, Derbyshire, UK

Zahid, O; Williams, Craig D.

doi:10.15761/ijc.1000110

Cited by 8 publications

(10 citation statements)

References 18 publications

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“…The second group is made of Ni, V and Co, which account for 19.46% total variance of eigen value. These elements might have enriched in the stream sediment by washout from automobile activities and other iron steel works, which correspond to the findings of [4,32]. The third group of elements, Th and La, account for 10.15% total variance of eigen value.…”

Section: Spatial Distribution Of Potentially Harmful Elements In Stresupporting

confidence: 67%

“…In their findings, it was observed that there is considerable increase in the concentration of PHEs and attributed the sources of enrichment to be associated to urbanisation and its attendant effects. Studies have also been conducted to assess the selective mobility characteristics of trace elements in both soils and sediments of densely populated towns that are underlain by sedimentary formations, using five-step sequential extraction methods, [4,8]. In the results obtained, there is a considerable increase in trace elements such as Pb, Zn, Cd, As, Cu and Cr in both soils and sediments, and the possible uptake potentials of As and Pb in relatively low pH environment was high.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of potentially harmful elements in floodplain soils and stream sediments in Ile-Ife area, South-western Nigeria

Asowata

Akinwumiju

2020

SN Appl. Sci.

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The enrichment of potentially harmful elements (PHEs) in stream sediments (SS) and floodplain soils (FS) poses great environmental hazards to water bodies and other parts of the ecosystem. The aim of this research was to evaluate the distribution pattern of selected PHEs (Cu, Pb, Zn, Co, Mn, As, Cd, V, Cr, Ni, Th, Sr and La) in SS of selected rivers that drain Ile-Ife area and their adjacent FS, to ascertain the pollution status of these elements in the study area. Sixty samples (40 SS and 20 FS) were purposely collected for this study; the samples were analysed with ultra-trace inductively coupled plasma mass spectrometry method (ICP-MS). The PHEs results showed decreasing trend of average contents of PHEs studied; Mn > Zn > V > Cr > Pb > La > Sr > Cu > Ni > Co > Th > As > Cd for both SS and FS. Also, PHEs concentration in the studied geo media showed a significant level of enrichment as observed from the results. Elemental association showed positive correlation for topsoil, Pb/Zn = R 2 , 0.85 and negative correlation for topsoil Cr/Zn = R 2 0.02 among the other PHEs. Source apportionment showed that the studied metal enrichment is largely anthropogenic rather than geogenic. Geoaccumulation and metal ratio indexes indicated that FS and SS studied have received significant PHEs of between moderately to strongly polluted, which implies significant environmental implications in the study area.

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Section: Spatial Distribution Of Potentially Harmful Elements In Stresupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Assessment of potentially harmful elements in floodplain soils and stream sediments in Ile-Ife area, South-western Nigeria

Asowata

Akinwumiju

2020

SN Appl. Sci.

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“… *Bioavailable Ratio (%) = (Bioavailable metal fraction/pseudo-total metal concentration in sample material) × 100 (Alibrahim & Williams, 2016 ; Kashem & Singh, 2001 )] …”

Section: Resultsmentioning

confidence: 99%

“…The median Cfs in the sediments for Zn (1.8), Co (1.3), Ni (1.4), and Cr (1.4) imply a moderate contamination level. The high Cfs *Bioavailable Ratio (%) = (Bioavailable metal fraction/ pseudo-total metal concentration in sample material) 9 100 (Alibrahim & Williams, 2016;Kashem & Singh, 2001)] and subsoil ([ 20 cm) and sediments. The red lines highlight Cf = 1, above which contamination is identified; Cf = 3, above which considerable contamination is identified; Cf = 6, above which high contamination is identified for Cu (ranging from 6.2 to 8.8) indicate significant contamination and strong enrichment of Cu compared to the local forest soil.…”

Section: Soil Contamination Indicesmentioning

confidence: 99%

Ecological risk and enrichment of potentially toxic elements in the soil and eroded sediment in an organic vineyard (Tokaj Nagy Hill, Hungary)

Pham

Babcsányi

Farsang

2021

Environ Geochem Health

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Potentially toxic elements (PTEs), such as Cu, Zn, Pb, Ni, Cr, and Co, can accumulate in vineyard soils due to repeated uses of inorganic pesticides and chemical or organic fertilizers. In sloping vineyards, PTEs can also be moved by soil erosion resulting in their accumulation in low-energy zones within the landscape, adversely affecting the soil environment. Our study evaluated the ecological risk related to the pseudo-total and bioavailable PTE contents (Zn, Pb, Co, Ni, Cr, and Cu) in the soil and eroded sediment samples from an organic vineyard in Tokaj (NE Hungary). The contamination status and the ecological risk of target PTEs were assessed by calculating the contamination factor, the pollution load index, the ecological risk factor, and the ecological risk index. The median pollution load indices of 1.15, 1.81, and 1.10 for the topsoil, the sediments, and the subsoil, respectively, demonstrate a moderate multi-element contamination case in the organic vineyard. Target PTEs tented to show increased concentrations in eroded sediments with the highest enrichment ratio (3.36) observed for Cu (Cu in the sediment/Cu in the topsoil), revealing a preferential movement of Cu-rich soil particles by overland flow. Moreover, PTEs were present in the sediments in more bioavailable forms (except Ni, Cr), assessed by an extraction procedure with EDTA. The ecological risk index (< 90) based on the studied PTEs showed an overall low ecological risk in the vineyard. Copper was the predominant factor of the ecological risk. Moreover, the highest ecological risk factor (24.6) observed for the bioavailable Cu content in an eroded sediment sample (representing 82% of the total ecological risk) shows that Cu accumulation in sloping vineyards is an ecological risk, particularly in the sedimentation zones. The high proportions of bioavailable Cu in the vineyard’s soil represent an increasing ecological risk over time, related to repeated treatments of vine plants with Cu-based pesticides.

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“…Furthermore, evaluating the bioavailability of PTEs is a common method for assessing environmental risk and toxicity to crops (Borgese et al 2013;Nunes et al 2014;Violante et al 2010). Several studies suggested that PTE availability depends mainly on the soil environment, such as the soil pH, soil texture, and soil organic matter (SOM) content (Alibrahim and Williams 2016;Takáč et al 2009;Violante et al 2010). Meanwhile, farming practices (conventional and organic agriculture), the age of the vineyard, and terrain morphology can also be considered dominant factors in determining soil quality and the PTE contamination status of the soil.…”

Section: Introductionmentioning

confidence: 99%

Accumulation patterns and health risk assessment of potentially toxic elements in the topsoil of two sloping vineyards (Tokaj-Hegyalja, Hungary)

Pham

Babcsányi

Balling³

et al. 2022

J Soils Sediments

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Purpose In agricultural soils, accumulation and bioavailability patterns of potentially toxic elements (PTEs) are key ecological and health risk issues, especially in metal-based crop protection systems such as those applied in vineyards. However, PTE levels in the topsoils of historical wine-growing regions of Hungary have been scarcely studied so far. The specific goals of this research were to assess the accumulation tendencies and bioavailability of PTEs complemented with human health risk assessment in two sloping vineyards with pH-contrasted soils in Tokaj-Hegyalja, Hungary, and under different farming practices. Methods Composite topsoil (< 20 cm) and borehole samples were collected from two vineyards and local forests. The total and bioavailable PTE contents (Zn, Pb, Co, Ni, Cr, Cu) were analyzed following digestion in aqua regia and extraction with a strong chelating agent (0.05 M Na2-EDTA). Enrichment factors (EFs) were calculated based on Fe as a reference element and the local uncultivated soil. The hazard indexes (HIs) for outdoor workers, children, and adults living in residential areas near the vineyards were calculated to assess the health risks associated with the target PTEs. Results Higher PTE contents were observed in the organic vineyard (near Tokaj) compared to the conventional one (near Tállya), except for Cu and Pb. The EFs confirmed that the duration of Cu-fungicide applications mainly determines the soil-bound Cu levels, with an average of 2.6 in the 28-year-old organic vineyard and 9.6 in the more than 100-year-old conventional vineyard. The PTEs predominantly accumulated at the top of the hillslope in Tállya, while in Tokaj, a general trend of downslope accumulation of PTEs can be noticed. Bioavailable Cu reached a maximum of 50% of total Cu at the top of the hillslope (Tállya) and positively correlated with soil organic matter content. Iron/Mn oxides, total Ca content, and soil pH show a significant correlation with the PTE total contents (other than Cu); meanwhile, their bioavailability is mainly influenced by Mn oxides. The calculated HIs are less than 1, indicating no elevated health risk. Total Cr is the major contributor to the HI in both vineyards, reaching 79.0% (Tokaj) and 49.7% (Tállya). Conclusion Overall, the accumulated Cu contents mainly depended on the vineyard age, while farming practices and terrain morphology play a minor role in its spatial distribution. The further accumulation of PTEs, especially in high-metal hotspots within the vineyards, may ultimately cause toxicity to re-planted grapevines, soil biota, and, in the longer term, farmers and residents.

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Assessment of bioavailability of some potential toxic metals in mining-affected soils using EDTA extraction and principle component analysis (PCA) approach, Derbyshire, UK

Cited by 8 publications

References 18 publications

Assessment of potentially harmful elements in floodplain soils and stream sediments in Ile-Ife area, South-western Nigeria

Assessment of potentially harmful elements in floodplain soils and stream sediments in Ile-Ife area, South-western Nigeria

Ecological risk and enrichment of potentially toxic elements in the soil and eroded sediment in an organic vineyard (Tokaj Nagy Hill, Hungary)

Accumulation patterns and health risk assessment of potentially toxic elements in the topsoil of two sloping vineyards (Tokaj-Hegyalja, Hungary)

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