The association of cobalt with easily reducible manganese in some acidic permanent grassland soils

Jarvis, S. C.

doi:10.1111/j.1365-2389.1984.tb00299.x

Cited by 39 publications

(31 citation statements)

References 25 publications

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“…However, it is clear from the present result and those of Jarvis (19846) that the nature of the materials involved, and the overall chemistry of Co in soils, still requires considerable investigation.…”

Section: Relationships Between Extractable and Isotopically Exchangeamentioning

confidence: 67%

The forms of cobalt in some Scottish soils as determined by extraction and isotopic exchange

McLaren

Lawson

Swift

1986

Journal of Soil Science

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The results of fractionation and correlation studies provided evidence that cobalt in soils is associated predominantly with the soil oxide fraction, particularly the manganese oxides. Only a small proportion of the total cobalt present in soils was extracted by acetic acid, EDTA, pyrophosphate or hydroxylamine. Cobalt extracted with these reagents was considered to be derived principally from easily reducible manganese oxides, although the origin of the cobalt extracted by acetic acid in particular was not well defined. The bulk of the cobalt present in soils appeared to be occluded by more highly crystalline oxide materials or was present in the structures of primary and secondary minerals.Labile cobalt in soil was assessed by extraction with acetic acid and EDTA and by determination of isotopically exchangeable cobalt. The amounts of cobalt extracted by both EDTA and acetic acid were highly dependent on the length of extraction period and on the temperature of extraction. Neither of these reagents appeared likely to give good estimates of the quantity or intensity factors of soil cobalt supply to plants as defined by the isotopic exchange determinations.

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Section: Relationships Between Extractable and Isotopically Exchangeamentioning

confidence: 67%

The forms of cobalt in some Scottish soils as determined by extraction and isotopic exchange

McLaren

Lawson

Swift

1986

Journal of Soil Science

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“…Highly significant correlations have been interpreted as the two elements having close associations. Nevertheless, results from such studies have demonstrated that the amounts of Co and Mn extracted in the reducible phase are strongly correlated (Jarvis, 1984), and it has been suggested that the association is due to the strong sorption of Co by Mn oxides. More recently, Li et al (1999Li et al ( , 2001aLi et al ( , 2001b have reported chemical relationships and associations between Co, Mn, and Fe for batch extraction data, based on linear correlation analysis.…”

Section: Evaluation Of Association Between Elements Using Statisticalmentioning

confidence: 98%

Evaluation of Distribution and Chemical Associations between Cobalt and Manganese in Soils by Continuous‐Flow Sequential Extraction

Tongtavee

Shiowatana

McLaren

et al. 2005

Communications in Soil Science and Plant Analysis

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In this study, a strong association between cobalt (Co) and manganese (Mn) in different geochemical soil phases (fractions) was evaluated using a continuous-flow sequential extraction technique employing a modified Tessier extraction scheme. With the flow system, detailed extraction profiles of Co and Mn in soils could be obtained by plotting concentrations of the elements extracted against extraction time (plots referred to as extractograms). Extractograms may be used as an indicator of whether the elements dissolving in the same extraction step are closely associated, or are merely extractable with the same reagent. From the soil samples studied, the coincidence of Co and Mn peaks seems to indicate a close association of these elements in the exchangeable, reducible, and oxidizable fractions. Analysis of flow extraction data suggested that the association between Co and Fe is not as strong as reported in previous studies based on the statistical analysis of batch fractionation data.

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“…Co and Mn were shown to be associated to each other in the estuarine sediments. This might be due to the specific adsorption of Co by Mn oxides (Jarvis 1984), and concentrations of Co sorbed by Mn oxides are reported to be much greater than those by Fe oxides (Backes et al 1995). Cr and Ni were also found to be associated to Mn, and this indicated the role of Mn in the scavenging of these metals in the estuarine environment.…”

Section: Metal-granulometric and Inter-metallic Relationshipsmentioning

confidence: 93%

Evaluation of heavy metal enrichment in Cochin estuary and its adjacent coast: multivariate statistical approach

Bindu

Deepulal

Gireeshkumar

et al. 2015

Environ Monit Assess

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Temporal and spatial variations of heavy metals in the Cochin estuary and its adjacent coastline during three seasons were studied to investigate the impact of anthropogenic heavy metal pollution. Total organic carbon, sand, silt, clay and 10 metals (Cd, Pb, Cr, Ni, Co, Cu, Zn, Mn, Mg and Fe) in the surface sediments were analysed. Multivariate statistical analyses like canonical correspondence analysis, principal component analysis and cluster analysis were used for source identification, integration of geochemical data and clustering of stations based on similarities. Enrichment factor, contamination factor and geoaccumulation index were used to assess the contamination level. From the study, it can be understood that estuary and coast are highly polluted especially with Cd, Zn, Pb and Ni. Anthropogenic influence of heavy metals was evidenced from both the principal component analysis and cluster analysis. Finer fractions (mud) of the sediment and the associated Fe oxy hydroxides might be playing major role in the transport of heavy metals in the system. Very high enrichment factor value observed suggested high anthropogenic pressure in the study area. All the stations in the northern part of the estuary showed very high enrichment factors indicating heavy load of Zn and Cd in this area which might have reached from the industrial area lying to the north side of the Cochin estuary. Pollution indices suggested that both the estuary and its adjacent coast were showing low contamination with respect to Cr, Mg, Mn and Fe; all other metals were causing low to extremely high levels of pollution in the study area.

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The association of cobalt with easily reducible manganese in some acidic permanent grassland soils

Cited by 39 publications

References 25 publications

The forms of cobalt in some Scottish soils as determined by extraction and isotopic exchange

The forms of cobalt in some Scottish soils as determined by extraction and isotopic exchange

Evaluation of Distribution and Chemical Associations between Cobalt and Manganese in Soils by Continuous‐Flow Sequential Extraction

Evaluation of heavy metal enrichment in Cochin estuary and its adjacent coast: multivariate statistical approach

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