Elemental sulfur amendment decreases bio-available Cr-VI in soils impacted by leather tanneries

Shi, Jingjing; Chen, Hualin; Arocena, J. M.; Whitcombe, T. W.; Thring, Ronald W.; Memiaghe, Jeff Nze

doi:10.1016/j.envpol.2016.01.045

Cited by 31 publications

(13 citation statements)

References 45 publications

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“…The findings presented in this study clearly indicate that application of elemental sulfur has a positive impact on sulfate content in soil, which corresponds with our previous results [58] and with results presented by other authors [30,47,59].…”

Section: Sulfate Sulfur Content In Soilsupporting

confidence: 93%

Bioavailability of Sulfur from Waste Obtained during Biogas Desulfurization and the Effect of Sulfur on Soil Acidity and Biological Activity

2020

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Sulfur deficiency has been recognized as a limiting factor for crop production in many regions of the world. A 120-day incubation experiment was conducted to assess the effect of the applied waste elemental sulfur on sulfur bioavailability in soil. Four doses of sulfur were applied: 10, 20, 30 and 60 mg S kg−1 dry matter (d.m.) of soil. In order to assess the effect of soil pH adjustment on sulfur oxidation, the research was conducted on two sets of soil samples: one set of soil samples had natural pH, and the second one was limed before sulfur application. Application of waste sulfur slightly affected the soil pH, and increased the content of available sulfur in soil proportionally to sulfur dose. A beneficial effect of waste sulfur application on soil dehydrogenase and catalase activity was found. Liming reduced soil acidity, and significantly increased sulfate content and soil enzymatic activity. Waste elemental sulfur may be an alternative source of sulfur, supplementing the deficiencies of this element in soils. The described way of sulfur waste reuse corresponds with the increasingly common approach to create waste-free technologies in all economy.

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Section: Sulfate Sulfur Content In Soilsupporting

confidence: 93%

Bioavailability of Sulfur from Waste Obtained during Biogas Desulfurization and the Effect of Sulfur on Soil Acidity and Biological Activity

2020

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“…Chromium speciation in soil is of paramount importance to assess the environmental and human health risks of potentially contaminated sites and to select and apply appropriate management and remediation strategies. This study investigated the extent of Cr(VI) occurrence in two Italian Lately, the findings of this study suggest that the maintenance of a medium-high content of organic matter in soil, promoting Cr(VI) reduction and lowering its bioavailability, along with no-tillage (i.e., no cyclic soil aeration) and possible supply of elemental sulphur [a Cr(VI)-reducing agent in soils impacted by leather tanneries (Shi et al, 2016)], might be appropriate actions to minimise the Cr(VI) occurrence in potentially contaminated soils as those investigated in this paper. The monitoring over time of the fate and stability of Cr(VI) in soil is also essential to manage and minimise the risks for environment and human health.…”

Section: Discussionmentioning

confidence: 99%

Hexavalent chromium quantification by isotope dilution mass spectrometry in potentially contaminated soils from south Italy

et al. 2019

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Due to carcinogenicity of hexavalent chromium [Cr(VI)], its accurate quantification in Crcontaminated soils is of paramount importance. The aim of this work was to quantify Cr(VI) by species-specific IDMS in soil samples from two Italian case studies: A) farmland potentially contaminated by pseudo-total Cr and Zn and heavy hydrocarbons due to past illegal burial of tannery wastes; B) Solofrana valley where volcanic soils are potentially contaminated by pseudototal Cr and Cu due to tannery activities. Hexavalent Cr extraction from soils was performed by focused microwaves (5 min at 80 °C) using 50 mM EDTA, followed by the separation of Cr species by IC and detection by ICP-MS. The Cr(VI) extracted from 20 soil samples of case study A ranged from 0.15 to 11.18 µg g -1 , with 70 % of samples exceeding the Cr(VI) screening value set by Italian Parliament for residential/urban soil to assess their potential contamination. Higher levels of Cr(VI)

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“…Because of the spatial heterogeneity of Cr contamination, a hand-held XRF spectrometer (Genius 9000 XRF, Skyray Instruments USA) capable of in situ determination of heavy metal concentrations was used to direct soil sampling. Composite surface soil (0–10 cm) samples at concentrations from 150 to tens of thousands mg kg –1 were collected using a shovel from randomly selected locations in the Shuitou-3 site (27.62327 o N, 120.31337 o E), which was reported as the most Cr-contaminated area. , A composite sample was prepared from soils collected from three individual spots at each location. Three samples (S1-4, S2-1, and S3-1) having the highest Cr concentration were used in this study for Cr speciation analysis.…”

Section: Methodsmentioning

confidence: 99%

“…USEPA 7196A determines Cr(VI) colorimetrically by reaction with diphenylcarbazide (DPC). For further details, see Shi et al The accuracy of total Cr(VI) analysis was evaluated by analyzing a certified reference sample of soil CRM 041 (LRAB5366) (Sigma-Aldrich, Canada). Good agreement of the measured Cr(VI) content (114 ± 0.6 mg kg –1 ) was achieved with the certified Cr(VI) content (130 mg kg –1 , 13% standard deviation, 91–169 mg kg –1 acceptable interval).…”

Section: Methodsmentioning

confidence: 99%

Formation and Immobilization of Cr(VI) Species in Long-Term Tannery Waste Contaminated Soils

Shi

McGill

Chen

et al. 2020

Environ. Sci. Technol.

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Chromium speciation in naturally contaminated soils appears more complex than spiked studies have shown. This study characterized Cr speciation (oxidation states; availability; molecular geometry) intended to highlight the genesis of immobile Cr(VI) species in long-term tannery waste-contaminated soils. In a series of samples obtained from Shuitou in China, chemical extraction methods showed that Cr(III) was dominant(>96.7% of total Cr), with Cr(VI) concentration up to 144 mg kg −1 . Of the total Cr(VI) present, immobile Cr(VI) represents >90%. Synchrotron-based X-ray near-edge structure spectroscopy (XANES) showed the occurrence of Cr(VI), which was not removed by phosphate buffer extraction, confirming a significant amount of immobile Cr(VI) fractions in soils. X-ray fluorescence maps exhibited the heterogeneous distribution of Cr in soils associated with both Mn and Fe. Such a distribution suggests Cr(III) oxidation to Cr(VI) by Mn oxides and a possible immobilization of both Cr(III) and Cr(VI) onto Fe (hydr)oxides. Linear combination fitting of XANES spectra revealed that fractional weights (%) in samples were CrFeO 3 , and CaCrO 4 (13.2−25.3). Our results demonstrate that (i) Cr(VI) is immobilized in soils and (ii) mechanisms of Cr(VI) immobilization are CaCrO 4 precipitation and recrystallization with Fe (hydr)oxides.

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Elemental sulfur amendment decreases bio-available Cr-VI in soils impacted by leather tanneries

Cited by 31 publications

References 45 publications

Bioavailability of Sulfur from Waste Obtained during Biogas Desulfurization and the Effect of Sulfur on Soil Acidity and Biological Activity

Bioavailability of Sulfur from Waste Obtained during Biogas Desulfurization and the Effect of Sulfur on Soil Acidity and Biological Activity

Hexavalent chromium quantification by isotope dilution mass spectrometry in potentially contaminated soils from south Italy

Formation and Immobilization of Cr(VI) Species in Long-Term Tannery Waste Contaminated Soils

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