Analytical Relevance of Trace Metal Speciation in Environmental and Biophysicochemical Systems

Benson, Nsikak U.; Anake, Winifred U.; Olanrewaju, I. O.

doi:10.4236/ajac.2013.411075

Cited by 36 publications

(19 citation statements)

References 54 publications

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“…The forms in which a metal ion exist (speciation) determine its geochemical and biological cycling in the environment (Benson et al 2013). The importance of organic and inorganic colloids in the dissolved fraction (< 0.45 m, including natural nanoparticles <0.1 m) and suspended particulate matter (SPM > 0.45 m) in trace metals bioavailability, toxicity, fate and transport is largely recognized (Horowitz et al 1987;Jaïry et al 1999;Vignati and Dominik 2003).…”

Section: Introductionmentioning

confidence: 99%

Suspended particulate matter determines physical speciation of Fe, Mn, and trace metals in surface waters of Loire watershed

Baalousha

Stoll

Motelica-Heino

et al. 2018

Environ Sci Pollut Res

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This study investigates the spatiotemporal variability of major and trace elements, dissolved organic carbon (DOC), total dissolved solids (TDS), and suspended particulate matter (SPM) in surface waters of several hydrosystems of the Loire River watershed in France. In particular, this study aims to delineate the impact of the abovementioned water physicochemical parameters on natural iron and manganese physical speciation (homoaggregation/heteroaggregation) among fine colloidal and dissolved (< 10 nm), colloidal (10-450 nm) and particulate (> 450 nm) phases in Loire River watershed. Results show that the chemistry of the Loire River watershed is controlled by two end members: magmatic and metamorphic petrographic context on the upper part of the watershed; and sedimentary rocks for the middle and low part of the Loire. The percentage of particulate Fe and Mn increased downstream concurrent with the increase in SPM and major cations concentration, whereas the percentage of colloidal Fe and Mn decreased downstream. Transmission electron microscopy analyses of the colloidal and particulate fractions (from the non-filtered water sample) revealed that heteroaggregation of Fe and Mn rich natural nanoparticles and natural organic matter to the particulate phase is the dominant mechanism. The heteroaggregation controls the partitioning of Fe and Mn in the different fractions, potentially due to the increase in the ionic strength, and divalent cations concentration downstream, and SPM concentration. These findings imply that SPM concentration plays an important role in controlling the fate and behavior of Fe and Mn in various sized fractions. Graphical abstract Physical speciation by heteroaggregation of (Fe-Mn) compounds: high [SPM] → [Fe-Mn] particulate faction; low {SPM] → [Fe-Mn] colloid-dissolved fraction.

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Section: Introductionmentioning

confidence: 99%

Suspended particulate matter determines physical speciation of Fe, Mn, and trace metals in surface waters of Loire watershed

Baalousha

Stoll

Motelica-Heino

et al. 2018

Environ Sci Pollut Res

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“… 28–31 The determination and quantification of only the total concentrations of trace metals may be misleading since this assumes that all forms of a chemical element have equal impact on the environment or bio-systems. 32 The biological availability and fate of trace metals for uptake in biological systems are dependent on the chemical forms in which they exist, and therefore, quantifying the total levels of trace metals is insufficient for explaining their mobility and predicting their toxicity. Hence, chemical fractionation or speciation provides a better understanding of the lability and toxic potentials of trace metals.…”

Section: Introductionmentioning

confidence: 99%

Chemical Speciation and Characterization of Trace Metals in Dry Camellia sinensis and Herbal Tea Marketed in Nigeria

Fred-Ahmadu

Adedapo

Oloyede

et al. 2018

Journal of Health and Pollution

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Background.Trace metals from anthropogenic activities have been found to occur in tea brands and pose potential human health risks to consumers.Objectives.The present study assessed the concentrations of trace metals in green, black and herbal tea brands using a modified Community Bureau of Reference sequential extraction method.Methods.Fifteen (15) Camellia sinensis and eight (8) herbal tea samples commonly consumed in Nigeria were collected and analyzed for trace metals. The concentrations of cadmium (Cd), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), vanadium (V), and zinc (Zn) in extract fractions were analyzed using microwave plasma atomic emission spectroscopy (MP-AES).Results.Trace metals were detected in all of the samples investigated. The concentrations of trace metals in 4 stages (soluble/exchangeable/carbonates bound fraction, reducible fraction, oxidizable fraction, residual fraction) of sequential and pseudo-total metal extraction procedures are presented. The concentrations of Cd, Cr, Cu, Mn, Ni, Pb, V, and Zn in the exchangeable/carbonate bound fraction for green tea ranged between 0.27–1.47, ND-0.33, ND-0.44, 7.05–33.04, 0.23–0.69, ND-0.51, ND-0.16 and 0.18–1.99 mg/kg, ND-0.73, 0.15–0.36, 0.36–0.59, 1.38–30.07, 0.15–0.54, 0.05–0.76, 0.15–0.34 and 0.27–0.77 mg/kg and 0.54–0.64, 0.25–0.41, 0.35–0.47, 18.72–23.98, 0.30–0.55, 0.15–0.21, 0.15–0.23 and 0.30–0.48 mg/kg for hebal tea, respectively.Conclusion.The metal content in the investigated tea indicated low to enhanced concentrations. Locally produced black teas recorded relatively low trace metal contents compared to the green and herbal tea samples. The most bioavailable trace metal was Mn, while Zn was most preferably bound to the residual fraction. Cadmium, Cr, Cu, Ni, Pb, and V were distributed at varied concentrations among other extractable phases. Daily consumption of the investigated tea products may expose consumers to potentially toxic metals as well as essential elements.Competing Interests.The authors declare no competing financial interests.

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“…It has been observed that natural processes for the formation of aquatic sediments are altered by human activities and are recognized as a reservoir for different chemical species, including metals [1] [2] [3]. The sediment has a great diversity of components, such as, clays, inorganic colloids as Fe and Al oxyhydroxides and soil organic matter which consists of humic substances and par-developed since its inception by Tessier et al in Canada [7], in Germany, Calmano and Förstner [4] [8], in Mexico, Barceló [9], Barceló et al [1], Quecholac, [10], Badillo-Camacho et al [11], among others in different countries, to develop the techniques, to optimize and to modify others, including Benson et al who published a review of the different analytical methods that have been used by researchers regarding sequential extractions [12]. The most common fractions have been established in a methodological scheme that consists of:  (F1), first extracted fraction called "Interchangeable" [7], comprises weakly adsorbed metal ions that can be released from sediment surface with changes in the ionic composition of water.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Surface Sediment from the José Antonio Alzate Dam in Mexico as a Deposit of Heavy Metals

Quintal¹,

Solís-Correa²,

García-Albortante³

et al. 2018

JEP

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The problem of contamination of Lerma River in the State of Mexico, México, has been studied in an integral way, since it is one of the rivers of importance due to its geographical situation in the country. José Antonio Dam is the main receiving body of this river that is being contaminated by, industrial wastewater, of which about 70% is inorganic, as well as discharges municipal and agricultural, driving a lot of material in suspension. This dam acts as a regulator of avenues and its water is used for agricultural irrigation and its sediments are used as sludge to improve agricultural soil in the surroundings. One of the studies that have been carried out is to determine the geochemical distribution of heavy metals in the sediments of this dam, as well as its adsorptive capacity towards different metals. It has been observed that these sediments acts as metal contaminants sequester. Knowing the composition and morphology of these sediments can provide information to understand the mobility of different heavy metals it contains, and potential health risk, which can finally lead to the establishment of purification capacity of this sludge.

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Analytical Relevance of Trace Metal Speciation in Environmental and Biophysicochemical Systems

Cited by 36 publications

References 54 publications

Suspended particulate matter determines physical speciation of Fe, Mn, and trace metals in surface waters of Loire watershed

Suspended particulate matter determines physical speciation of Fe, Mn, and trace metals in surface waters of Loire watershed

Chemical Speciation and Characterization of Trace Metals in Dry Camellia sinensis and Herbal Tea Marketed in Nigeria

Behavior of Surface Sediment from the José Antonio Alzate Dam in Mexico as a Deposit of Heavy Metals

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Analytical Relevance of Trace Metal Speciation in Environmental and Biophysicochemical Systems

Cited by 36 publications

References 54 publications

Suspended particulate matter determines physical speciation of Fe, Mn, and trace metals in surface waters of Loire watershed

Suspended particulate matter determines physical speciation of Fe, Mn, and trace metals in surface waters of Loire watershed

Chemical Speciation and Characterization of Trace Metals in Dry Camellia sinensis and Herbal Tea Marketed in Nigeria

Behavior of Surface Sediment from the Jos&#233; Antonio Alzate Dam in Mexico as a Deposit of Heavy Metals

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Behavior of Surface Sediment from the José Antonio Alzate Dam in Mexico as a Deposit of Heavy Metals