Characterization of chromium and copper complexes with fulvic acids isolated from soils in Slovenia

Krajnc, Matjaž; Štupar, Janez; Milićev, S.

doi:10.1016/0048-9697(94)04316-f

Cited by 26 publications

(12 citation statements)

References 29 publications

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“…Guidi et al [15] found that SEC‐separated fractions from soil OM also demonstrated a different selectivity for certain trace metals: Trivalent Cr 3+ and Fe 3+ eluted together with ligands having small retention times (and thus larger hydrodynamic size), while the contrary was true for divalent cations (Cu 2+ , Cd 2+ , Ni 2+ , Zn 2+ , Mn 2+ ). A similar result was obtained for SEC fractions of soil FA regarding the binding of trivalent Cr versus divalent Cu [16]. Disparate results were obtained for Zn and Cu distribution among fractions of different molecular weight of OM from various sources [6,17,18].…”

Section: Introductionsupporting

confidence: 68%

Trace metal distribution in soluble organic matter from municipal solid waste compost determined by size‐exclusion chromatography

Kaschl

Römheld

Chen

2002

Enviro Toxic and Chemistry

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Municipal solid waste (MSW) composts carry high amounts of trace metals and organic complexing agents that may influence metal bioavailability and mobility after application to soils. In order to assess the degree of organic complexation of trace metals in the solution phase of MSW compost and the relevance of organic ligand type, size exclusion chromatography (SEC) was applied to compost-extracted organic ligands. Adjustment of the elution conditions minimized the interaction with the gel matrix for compost humic substances and dissolved organic matter (DOM) fractions. The SEC was then used to separate the aqueous compost extract into samples with distinct differences in chemical constituents. The highest quantities of Cu, Zn, Ni, Mn, and Cd were found to coelute with the main peak of the SEC elution curve, which, as observed by Fourier-transformed infrared (FTIR) spectroscopy, also had the highest density of carboxyl groups. The ratio of aromatic to aliphatic structures was higher for eluates with low retention times, and cations such as Al, Cr, and Fe were preferably associated with these larger organic molecules. All trace metals in the compost solution phase were bound mostly to DOM rather than forming inorganic complexes.

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Section: Introductionsupporting

confidence: 68%

Trace metal distribution in soluble organic matter from municipal solid waste compost determined by size‐exclusion chromatography

Kaschl

Römheld

Chen

2002

Enviro Toxic and Chemistry

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“…The mitigating effect of algal immobilization on nickel and chromium stress in Aulosira fertilissima has been reported by Banerjee and Mishra [20]. Methionine (amino acid) and polysaccharides facilitate binding of metals with sulphydryl groups, reducing the toxic effects of metals on enzyme system [21,22]. Furthermore, detailed mechanism of metal toxicity to cyanobacteria is not yet known but is estimated to have an unfavorable effect on respiration, photosynthesis and other processes in sensitive cyanobacterial strains.…”

Section: Discussionmentioning

confidence: 91%

Environmental toxicity: Exposure and impact of chromium on cyanobacterial species

Kiran

Rani

Kaushik

2016

Journal of Environmental Chemical Engineering

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“…These types of complexes have been reported and their stability has been studied in previous studies. It was suggested that most Cr(III) was bound to high molecular weight organic ligands in both natural waters and laboratory prepared humic substance solutions (Krajnc et al, 1995; Koshcheeva et al, 2007). Complexation with organic matter could alter the mobility of Cr(III) in the environment.…”

Section: Intoductionmentioning

confidence: 99%

Occurrence and speciation of polymeric chromium(III), monomeric chromium(III) and chromium(VI) in environmental samples

Cai

Jiang

2016

Chemosphere

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Laboratory experiments suggest that polymeric Cr(III) could exist in aqueous solution for a relative long period of time. However, the occurrence of polymeric Cr(III) has not been reported in environmental media due partially to the lack of method for speciating polymeric Cr. We observed an unknown Cr species during the course of study on speciation of Cr in the leachates of chromated-copper-arsenate (CCA)-treated wood. Efforts were made to identify structure of the unknown Cr species. Considering the forms of Cr existed in the CCA-treated woods, we mainly focused our efforts to determine if the unknown species were polymeric Cr(III), complex of Cr/As or complex of Cr with dissolved organic matter (DOM). In order to evaluate whether polymeric Cr(III) largely exist in wood leachates, high performance liquid chromatography coupled with inductively coupled mass spectrometry (HPLC-ICPMS was used) for simultaneous speciation of monomeric Cr(III), polymeric Cr(III), and Cr(VI). In addition to wood leachates where polymeric Cr (III) ranged from 39.1 to 67.4 %, occurrence of the unknown Cr species in other environmental matrices, including surface waters, tap and waste waters, was also investigated. It was found that polymeric Cr(III) could exist in environmental samples containing μg/L level of Cr, at a level up to 60% of total Cr, suggesting that polymeric Cr(III) could significantly exist in natural environments. Failure in quantifying polymeric Cr(III) would lead to the underestimation of total Cr and bias in Cr speciation. The environmental implication of the presence of polymeric Cr(III) species in the environment deserves further study.

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Characterization of chromium and copper complexes with fulvic acids isolated from soils in Slovenia

Cited by 26 publications

References 29 publications

Trace metal distribution in soluble organic matter from municipal solid waste compost determined by size‐exclusion chromatography

Trace metal distribution in soluble organic matter from municipal solid waste compost determined by size‐exclusion chromatography

Environmental toxicity: Exposure and impact of chromium on cyanobacterial species

Occurrence and speciation of polymeric chromium(III), monomeric chromium(III) and chromium(VI) in environmental samples

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