Geochemical sources of metal contamination in a coal mining area in Chhattisgarh, India using lead isotopic ratios

Das, Avijit; Patel, Subhra Sarita; Kumar, Rajeev; Krishna, K. V. S. S.; Dutta, Saikat; Saha, Manik C.; Sengupta, S.; Guha, D. B.

doi:10.1016/j.chemosphere.2018.01.016

Cited by 45 publications

(13 citation statements)

References 38 publications

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“…Soils contaminated by potentially toxic metals (PTMs) and in particular by lead (Pb), zinc (Zn), and cadmium (Cd) are a widespread problem (Edogbo et al 2020). Pb and Cd are the most toxic elements whose extensive use (ore mining, tailings, and smelting) has caused environmental and health problems in many parts of the world (Das et al 2018;Doumas et al 2018;Huang et al 2018;Contin et al 2019;Varrica et al 2018;).…”

Section: Introductionmentioning

confidence: 99%

Changes in organic matter composition caused by EDTA washing of two soils contaminated with toxic metals

Jez

Bravo

Leštan

et al. 2021

Environ Sci Pollut Res

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Two soils contaminated with potentially toxic metals (PTMs) contrasting in pH and mineralogy were remediated with CaEDTA, and changes in soil organic matter (SOM) composition were investigated. Previous studies showed no significant loss of SOM from CaEDTA-treated soils, but the results of our study reflected significant decreases (from 46 to 49%) in the free fraction of humic acids (HAs). Remediation affected the composition of the free HA fraction via disturbance of intermolecular bonds — an increase in phenolic and aromatic groups with a simultaneous decrease in carbohydrates — which was confirmed by FTIR spectroscopy in both soils. Because non-radical molecules such as carbohydrates were selectively removed, the concentration of free radicals in the free HA fraction increased in acidic soil. The bound fraction of HAs and fulvic acids (FAs) in SOM, which are important due to their stability and the permanent effects they have on the soil’s physical properties, remained unchanged in both remediated soils. The effect of soil recultivation was observed only in the excitation emission matrix (EEM) fluorescence spectra of HAs. In terms of SOM, CaEDTA soil washing can be considered moderately conservative; however, the restoration of free humic fractions is likely to be a long-term process.

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Section: Introductionmentioning

confidence: 99%

Changes in organic matter composition caused by EDTA washing of two soils contaminated with toxic metals

Jez

Bravo

Leštan

et al. 2021

Environ Sci Pollut Res

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“…Thus, there is the need to integrate and interpret the mentioned methods with multivariate statistical analysis. In this regard, factor, principal component, and hierarchical cluster analyses are widely and effectively used multivariate statistical techniques for identifying the sources of heavy metals in sediments (Sun et al, 2017;Das et al, 2018). However, this technique is constrained by bias in the interpretation of some source apportionment since it is incapable of identifying the contribution rates of each specific source (Yu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Geochemistry, risk assessment, and Pb isotopic evidence for sources of heavy metals in stream sediments around the Ulukışla Basin, Niğde, southern Turkey

Lermi¹,

Sunkari²

2020

Turkish J Earth Sci

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Concentrations of selected elements (Al, Fe, Mn, Mo, As, Cd, Cu, Cr, Ni, Co, Pb, Sb, and Zn) and Pb isotope ratios were determined in 53 sediments from Alihoca, Gümüş, Horoz, and Çakıt streams around the south-central Taurides (Ulukışla Basin), Niğde, which is a known mining province in Turkey. Several pollution and risk assessment indices were used to assess possible heavy metal pollution in the stream sediments and the associated potential ecological risks. Concentrations of As, Cd, Cu, Cr, Ni, Co, Pb, Sb, and Zn were elevated in the streams located near ancient mines, active mines, and slag piles in the area, suggesting an influence from mining activities. The pollution assessment indices indicated that the sediments were significantly polluted by As, Cd, Sb, Zn, and Pb and moderately polluted by Cu, Ni, Cr, and Co. The sediments show very high potential ecological risk with As, Cd, Sb, and Pb as the principal contributors. Ni, Cr, As, Pb, Zn, and Cd exceeded the probable effect concentrations in most of the samples implying that their concentrations may frequently affect sediment-dwelling organisms. Multivariate statistical analyses indicate that the accumulation of heavy metals in the stream sediments is due to an interplay of anthropogenic activities (mining and agrochemical application) and geogenic processes (weathering of bedrocks and supergene alteration of base metal-rich mineralization). Pb isotopic tracing indicates that total Pb in the sediments (206 Pb/ 207 Pb = 1.09-1.29) is primarily from weathering and dissolution of ultrapotassic rocks (206 Pb/ 207 Pb up to 1.20) and galena (206 Pb/ 207 Pb up to 1.21) from the Pb-Zn-Au deposits in the area with some anthropogenic input from mine slag piles (206 Pb/ 207 Pb = 1.10).

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“…Lead, which is widespread in soils contaminated with heavy metals, has strong accumulation capacity and strong biological toxicity [1]. This metal originates mostly from mining [2], metal smelting and processing, sewage discharge, sewage irrigation, and the use of leaded gasoline; thus, soil pollution by lead has become a primary concern. Cement-based solidification/stabilization process is extensively used to control heavy-metal pollution [3], but this process has the drawbacks of relatively high volume-change ratio, high cement cost, unstable solidified products [4] and environmental-related problems during cement production [5,6].…”

Section: Introductionmentioning

confidence: 99%

Properties of Phosphorus-Slag-Based Cementitious Pastes for Stabilizing Lead

et al. 2019

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The properties and curing mechanism of leaded samples solidified with phosphorous-slag-based cementitious pastes are studied. The compressive strength, pH of percolate, and lead-ion concentrations of leaded samples stabilized with the phosphorous-slag-based cementitious pastes and cement were analyzed. Results confirmed that the phosphorous-slag-based cementitious paste performed much better than cement in terms of solidifying lead. The cured form of lead with phosphorous-slag-based cementitious pastes had higher compressive strength, lower lead leaching, and smaller change in pH. Higher lead content corresponded with more obvious advantagees of phosphorus-slag-based cementitious pastes and lower risk of environmental pollution. By means of X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Energy Dispersive Spectrometer-Scanning Electron Microscope (EDS-SEM) analyses, we found that the hydration of phosphorus-slag-based cementitious pastes produced hydrated calcium silicate gels, ettringite and other minerals with large specific surface areas, as well as some leaded products that can combine with lead ions to form chemically stable leaded products. This finding well explained the high performance of phosphorus-slag-based cementitious pastes in terms of lead solidification and stabilization.

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Geochemical sources of metal contamination in a coal mining area in Chhattisgarh, India using lead isotopic ratios

Cited by 45 publications

References 38 publications

Changes in organic matter composition caused by EDTA washing of two soils contaminated with toxic metals

Changes in organic matter composition caused by EDTA washing of two soils contaminated with toxic metals

Geochemistry, risk assessment, and Pb isotopic evidence for sources of heavy metals in stream sediments around the Ulukışla Basin, Niğde, southern Turkey

Properties of Phosphorus-Slag-Based Cementitious Pastes for Stabilizing Lead

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