Organic and total mercury determination in sediments by cold vapor atomic absorption spectrometry: methodology validation and uncertainty measurements

Franklin, Robson L.; Bevilacqua, José Eduardo; Tecnologia, Diretoria de; Fávaro, D. I. T.; Prestes, Lineu

doi:10.1590/s0100-40422012000100009

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…Several studies have already determined the concentrations of trace elements in river sediments in Brazil, notably Melo et al (2012), Santos et al (2013), Botero et al (2014), and Voigt et al (2016). Nevertheless, studies involving Hg are scarce, especially because of the complex technical requirements of exclusive extraction and the high costs of analyses (Franklin et al, 2012). Some of the noteworthy studies are: Siqueira & Aprile (2012); Hortellani et al, (2013); Almeida et al, (2014); Araujo et al (2015); Remor et al (2015); Rocha et al, (2015); and Sahoo et al (2015).…”

Section: Introductionmentioning

confidence: 99%

Mercury in the Sediment of Pelotas River Basin, Brazil

et al. 2018

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Many studies have determined the concentration of trace elements in river sediments in Brazil. Notwithstanding, mercury assessments are scarce, especially because of exclusive extraction techniques and expensive analysis techniques. Still, this element is known for its toxicity, persistence, and bioaccumulation, making its presence in the environment an important factor for biota and human health. For this reason, the objective of this study was to determine the mercury concentration in the sediment of the Pelotas River basin, located on the border of the states of Santa Catarina and Rio Grande do Sul. The sediment was collected at eight locations of the Pelotas basin and, after drying, the mercury was quantified by atomic absorption spectrometry based on the Zeeman-background correction, coupled to a pyrolysis reactor. The mercury concentrations in the sediments of the Pelotas River varied from 40.5 ng g-1 to 62.0 ng g-1 and presented a positive correlation with the fraction of silt and clay. The concentrations of mercury found in sediments of the Pelotas River basin have a low probability of negatively affecting the biota. Nonetheless, given the persistence and bioaccumulation potential of this element, the aforementioned region needs further studies to quantify the risks it may cause on the local biota and human health.

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Section: Introductionmentioning

confidence: 99%

Mercury in the Sediment of Pelotas River Basin, Brazil

et al. 2018

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“…2018 sediments in Brazil and in the World, such as Andrade et al (2017), Bai et al (2016), Begy et al (2016), Franz et al (2013), Franz et al (2014), Poitrasson et al (2014), Resongles et al (2014), Silva et al (2013), and Voigt et al (2016). However, due to the need for unique extraction techniques and the cost of analyses, studies involving mercury are in less number (Franklin et al, 2012). In this sense, the studies of Araujo et al (2015), Cabral et al (2016), Hu et al (2015), Remor et al (2015), Sahoo et al (2015), and Remor et al (2018) stand out.…”

Section: Introductionmentioning

confidence: 99%

Mercury in the Sediment of the Upper Parnaíba River

et al. 2018

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The contamination of aquatic environments with chemical trace elements can be evaluated by their accumulation in sediments of the water body. Studies on mercury require the use of exclusive extraction techniques that have relatively high costs when compared to the analysis of other trace elements. This study was conducted aiming at determining the mercury concentration in sediments of the Upper Parnaíba River basin, located in a region of agricultural expansion between the states of Piauí and Maranhão. The sediment was collected at 12 sites in the basin. After drying, the quantification of total mercury was performed by the Zeeman atomic absorption spectrometry coupled to a pyrolysis reactor. Mercury concentrations in sediments of the Parnaíba River ranged from 4.2 to 58.5 ng g −1 and presented a low probability of adverse effects on biota. Mercury had no correlation with the variables clay, silt, sand, total organic carbon, iron, and aluminum, demonstrating its possible anthropogenic origin. Although mercury concentrations have a low probability to disturb the balance of the local ecosystem, there is a need for monitoring the region in order to quantify the risks to biota and human health.

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“…Many different techniques have been developed for the detection, quantification, and speciation of Hg with improvement in pretreatment methods, analytical methods, and analytical instruments (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). Chemical vapor generation (CVG) introduced by Hatch and Ott in 1968 (14) has achieved significant and widespread application thanks to its efficient matrix separation method/ability, high analyte transport efficiency, high selectivity, and high sensitivity in combination with atomic absoprtion spectrometry (15).…”

Section: Introductionmentioning

confidence: 99%