Influence of extractable soil manganese on oxidation capacity of different soils in Korea

Chon, Chul-Min; Kim, Jae Gon; Lee, Gyoo Ho; Kim, Tack Hyun

doi:10.1007/s00254-007-1029-7

Cited by 15 publications

(8 citation statements)

References 25 publications

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“…The dark infillings of Fe/Mn oxides were clearly observed in the voids between matrices, indicating the accumulation of pedogenic Fe and Mn weathered from serpentinites. The pedogenic Fe and Mn oxides were low in crystallinity, as supported by the XRD data, indicating high reactivity with Cr in the soils (Chon et al, 2008). Regarding the serpentine tailing weathering for the study area, soluble Mg and Si have been almost completely leached and only nonsoluble elements, such as Fe, Mn, and Cr, remained in the soil.…”

Section: Various Fractions Of Cr Associated With Fe and Mnsupporting

confidence: 52%

“…Exchangeable Cr(VI) was discerned in all samples ranging from 34.8 to 183 lg/kg (Table 2), which was higher than those of up to 42 lg/kg in the soils and alluvial sediments from serpentines in California (Mills et al, 2011). Chon et al (2008) found that greater Cr oxidation was associated with Mn valence in the soils in Korea. Moreover, Fandeur et al (2009) identified that the distribution of Cr(VI) was associated closely with Mn-and Fe-oxides with a significant preference for the later species using XANES on the thin sections of serpentine soils from New Caledonia.…”

Section: Various Fractions Of Cr Associated With Fe and Mnmentioning

confidence: 85%

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Chromium Speciation Associated with Iron and Manganese Oxides in Serpentine Mine Tailings

Chen

Iizuka

et al. 2013

Environmental Engineering Science

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Chromium is easily trapped by Fe-oxyhydroxides when the two elements are weathered from serpentinites. Additionally, manganese oxides are the only known naturally occurring oxidant for Cr(III). To elucidate the effects of Fe and Mn oxides on Cr speciation from serpentine mine tailing, this study explored Cr(VI) generation from lithiogenic Cr that increases as a result of tailing weathering, which was caused by partitioning changes of this element with pedogenic Fe and Mn oxides. Twenty-nine tailing samples (0-5 cm) were obtained from an abandoned site of serpentine mining on Wan-Ron Hill in eastern Taiwan. Samples were characterized using chemical extraction, as well as mineralogical and statistical approaches. Based on the experimental results, exchangeable Cr(VI) was observed in all samples ranging from 34.8 to 183 lg/kg. Chromite was the main Crbearing mineral examined in this study. Total labile Cr release and subsequent Cr(VI) generation led to the hypothesis that the labile Cr resulted initially and mainly from chromite weathering. Dithionite-citratebicarbonate and oxalate extractions facilitated identifying the incongruent dissolution between Cr and Fe (and/ or Mn). The Cr(VI) increased with concentrations of various forms of Fe and Mn, except for total Fe, revealing that Cr(VI) could be released from the surface of the Mn oxides, where it had been oxidized, and subsequently re-adsorbed onto the surface of the surrounding Fe oxides.

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Section: Various Fractions Of Cr Associated With Fe and Mnsupporting

confidence: 52%

Section: Various Fractions Of Cr Associated With Fe and Mnmentioning

confidence: 85%

Chromium Speciation Associated with Iron and Manganese Oxides in Serpentine Mine Tailings

Chen

Iizuka

et al. 2013

Environmental Engineering Science

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“…Also the new formed-Cr(VI) can be reduced by other soil components (Bartlett, 1991). In any case, some authors find a significant correlation in soil between the amounts of easily reducible manganese oxides and the soil capacity to oxidise Cr(III) (Chon et al, 2008). In our soil samples we did not observe this correlation (data not shown).…”

Section: Preliminary Investigationscontrasting

confidence: 50%

“…The analytical procedure is based on the contact between the soil and a solution of Cr(III) (CrCl 3 as source) and the subsequent measurement of the possible formed-Cr(VI) by colorimetric reaction of Cr(VI) with diphenylcarbazide and spectrophotometric detection at 540 nm. The number of potentially oxidisable moles of Cr(III) to Cr(VI) by soil manganese oxides present in the soil was calculated by dividing the number of moles of Mn from easily reducible manganese oxides by 1.5, being 1.5 the molar ratio between Mn and Cr(III) in the oxidation reaction (Chon et al, 2008). The moles of Mn from easily reducible manganese oxides were determined by analysing the extract of the second step of the three-stage sequential extraction protocol proposed by the Measurements and Testing Programme -MAT (formerly BCR) of the European Commission (Rauret et al, 1999).…”

Section: Preliminary Investigations: Standard Cr Net Oxidation Test and Cr(vi) Quantification By Colorimetric-based Techniques In Soil Samentioning

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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“…Dithionite-citrate-bicarbonate extraction is typically used to extract iron and manganese (oxyhdr)oxide minerals in soil and iron plaque on root surfaces (Taylor and Crowder 1983;Chon et al 2008). The extraction of iron plaque in the present study was performed as described by Taylor and Crowder (1983).…”

Section: Extraction Of Iron Plaque On Rootsmentioning

confidence: 99%

Arsenic mobilization and speciation during iron plaque decomposition in a paddy soil

et al. 2012

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Purpose Little information is available concerning the mobilization and speciation of arsenic (As) in paddy soils during iron plaque decomposition. It is important to investigate these processes since they affect As bioavailability and contaminate surface and ground water systems. Materials and methods A microcosm experiment was conducted to investigate the reductive dissolution of iron plaque and subsequent As mobilization under NaN 3 sterilized (abiotic treatments) and non-sterilized (biotic treatments) paddy soil conditions. Results and discussion In the biotic treatment, As and iron (Fe) were quickly released into the soil solution, with more than 76.1% of total arsenic (T As ) on the roots lost in 27 days. In the abiotic treatment, both iron plaque decomposition and As release were significantly slower, with only 39.4% of T As on the roots lost in 85 days. A part of arsenate reduction reaction occurred before and may also occur after release from roots in both abiotic and biotic treatments. Bacterial abundance, quantified by real-time PCR, varied significantly between treatments. Terminal restriction fragment length polymorphism combined with principal component analysis (PCA) revealed that microbial community structures were also different between treatments.Conclusions The changes in microbial factors (bacterial abundance and microbial diversity and activities) significantly affected iron plaque decomposition, As mobilization, and speciation processes. Iron plaque reductive dissolution was likely the major factor leading to As release. Most As released was trapped in the solid phase during the incubation period.

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Influence of extractable soil manganese on oxidation capacity of different soils in Korea

Cited by 15 publications

References 25 publications

Chromium Speciation Associated with Iron and Manganese Oxides in Serpentine Mine Tailings

Chromium Speciation Associated with Iron and Manganese Oxides in Serpentine Mine Tailings

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

Arsenic mobilization and speciation during iron plaque decomposition in a paddy soil

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