Manganese in coastal rainwater: speciation, photochemistry and deposition to seawater

Willey, Joan D.; Inscore, Michael Todd; Kieber, Robert J.; Skrabal, Stephen A.

doi:10.1007/s10874-009-9140-7

Cited by 9 publications

(6 citation statements)

References 43 publications

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“…The presence of Mn in all the studied localities was attributed to crustal sources. Moreover, Mn is one of the most abundant trace elements in atmospheric waters [104]. However, Mn and As occurred in the moderate enrichment class in all the studied regions, i.e., mainly from the sedimentary terrain and dust particles.…”

Section: Enrichment Factormentioning

confidence: 87%

Evidence of Natural and Anthropogenic Impacts on Rainwater Trace Metal Geochemistry in Central Mexico: A Statistical Approach

Rivera-Rivera

Escobedo-Urías

Jonathan

et al. 2020

Water

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Trace metals Fe, Mn, Cr, Cu, Ni, Co, Pb, Zn, Cd, and As were determined on a monthly basis in a total of 52 rain samples collected from six different locations in the central region of Mexico during March 2016–April 2017. The average concentrations of trace metals (mg/L) in the rainwater samples showed an order of Zn (0.873) > Fe (0.395) > Mn (0.083) > Cr (0.041) ≥ Cu (0.041) > Pb (0.031) > Ni (0.020) > Co (0.013) > As (0.0003) > Cd (0.002). The differences observed in metal concentrations are related to variations in the influence of continental air masses, local transport, regional advection, and the solubility of trace metals. High concentrations of metals were observed in the months of March to May at all sites, probably due to the less extensive removal of air/air pollutants. The values obtained from the enrichment factor (EF) per metal showed relatively high values for Cd, Zn, Cu, Pb, Co, Ni, and Cr, suggesting anthropogenic origin. Pearson’s correlation matrix validated the distribution of trace metal sources and their relationships with local/regional meteorological characteristics. This paper presents relevant basic information for the evaluation of the toxic potential of rainwater and the possible health risks when using this source of water for human consumption.

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Section: Enrichment Factormentioning

confidence: 87%

Evidence of Natural and Anthropogenic Impacts on Rainwater Trace Metal Geochemistry in Central Mexico: A Statistical Approach

Rivera-Rivera

Escobedo-Urías

Jonathan

et al. 2020

Water

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“…Manganese concentrations were analyzed by graphite furnace atomic absorption spectroscopy using a Perkin-Elmer 5100 PC atomic absorption spectrometer equipped with a 5100 ZL Zeeman furnace module and AS 70 autosampler (dl 2 nM, rsd 3%). Dissolved Mn (0.05 μm filter) was operationally defined as Mn(II) . A certified standard with 61.3 ± 2 nM Mn (National Research Council Canada SLRS-4) was diluted by half and analyzed every time samples were run.…”

Section: Methodsmentioning

confidence: 99%

“…Dissolved Mn (0.05 μm filter) was operationally defined as Mn(II). 24 A certified standard with 61.3 ± 2 nM Mn (National Research Council Canada SLRS-4) was diluted by half and analyzed every time samples were run. A total of 56 separate analyses yielded a concentration of 31 ± 2 nM which was within the reported uncertainty of the reference material.…”

Section: ■ Introductionmentioning

confidence: 99%

Controls on the Redox Potential of Rainwater

Willey

Mullaugh

Kieber

et al. 2012

Environ. Sci. Technol.

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Hydrogen peroxide acting as a reductant affects the redox potential of rainwater collected at the Bermuda Atlantic Time Series Station, the South Island of New Zealand, the contiguous USA, and the primary study site in Wilmington, NC. Analytical measurements of both halves of redox couples for dissolved iron, mercury, and the nitrate-nitrite-ammonium system can predict the rainwater redox potential measured directly by a platinum electrode. Measurements of these redox couples along with the pH in rain yields pe⁻ between 8 and 11; the half reaction for hydrogen peroxide acting as a reductant using typical rainwater conditions of 15 μM H₂O₂ at pH 4.7 gives pe⁻ = 9.12, where pe⁻ = negative log of the activity of hydrated electrons. Of the six rainwater redox systems investigated, only manganese speciation appeared to be controlled by molecular oxygen (pe⁻ = 15.90). Copper redox speciation was consistent with superoxide acting as a reductant (pe⁻ = 2.7). The concentration of H₂O₂ in precipitation has more than doubled over the preceding decade due to a decrease in SO₂ emissions, which suggests the redox chemistry of rainwater is dynamic and changing, potentially altering the speciation of many organic compounds and trace metals in atmospheric waters.

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“…Mn(II) is predominate in most situation s and it is often the most soluble chemical species of manganese and represented about 91% of the manganese (ellingSen et al 2006, pearsoN, greeNwaY 2005. Dissolved, colloidal and particulate manganese concentrations were measured in rainwater (Willey 2009). It was concluded that wet deposition is an important source of soluble, stable Mn to surface seawater.…”

Section: Manganese Exists In the Aquatic Environmentmentioning

confidence: 99%

“…Human populations lving near industrial facilities may be exposed to doses of manganese of up to 200 µg 24 h -1 (in air) to 12.4 mg 24 h -1 in plant foods consumed. Mn has many anthropogenic sources, including refuse incineration, iron and steel manufacturing, mining, and gasoline, coal and oil combustion (Willey et al 2009). Manganese is one of the most frequently used materials in industry, which leads to its elevated levels present in the surrounding environment.…”

Section: Introductionmentioning

confidence: 99%

Manganese and its speciation in environmental samples using hyphenated techniques: A review

Jabłońska‐Czapla¹

2015

J. Elem.

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Manganese is one of the most frequently used materials in industry, hence its elevated levels in the surrounding environment. Manganese is an essential nutrient, important in biochemical reactions of several enzymes; on the other hand, it can cause both acute and chronic diseases (eg. manganism). The importance of manganese in living systems remains poorly explored. Manganese compounds share with certain other elements the property of being essential for life, but certain manganese species and large doses are toxic. Manganese plays an important role in iron metabolism and is required for the brain's normal function. Chemical speciation is an important subject in the environmental protection as well as in toxicological and analytical research because toxicity, availability and reactivity of trace elements depend on the chemical forms in which they occur. This study deals with effects of manganese and manganese speciation forms on living organisms, particularly in aquatic environments. The review presents manganese speciation methods using sophisticated hyphenated techniques.The hyphenated techniques, in which a separation method is coupled with multi-dimensional detectors, have become a useful alternative. These techniques allow for a qualitative and quantitative analysis of the sample composition, wherein manganese may be present in various speciation forms. The article provides many examples of the hyphenated technique application in manganese speciation analysis.

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Manganese in coastal rainwater: speciation, photochemistry and deposition to seawater

Cited by 9 publications

References 43 publications

Evidence of Natural and Anthropogenic Impacts on Rainwater Trace Metal Geochemistry in Central Mexico: A Statistical Approach

Evidence of Natural and Anthropogenic Impacts on Rainwater Trace Metal Geochemistry in Central Mexico: A Statistical Approach

Controls on the Redox Potential of Rainwater

Manganese and its speciation in environmental samples using hyphenated techniques: A review

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