Mercury in soil: A method for assessing acceptable limits

Revis, N. W.; Osborne, Tanya R.; Holdsworth, G.; Hadden, C.T.

doi:10.1007/bf01056090

Cited by 49 publications

(10 citation statements)

References 9 publications

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“…Vishnivetskaya et al [14] reported that with increasing distance from high levels of mercury-contaminated locations, inorganic mercury levels decreased, while Me-Hg levels increased, indicating mercury is a bioavailable compound and can be accessed by resident microorganisms. Revis et al [15] suggested that an acceptable limit of soil mercury was 72 ppm. e World Health Organization (WHO) suggested that the provisional tolerable weekly intake (PTWI) of mercury is 1 μg/kg body weight [16].…”

Section: Mercury Level Of Samplesmentioning

confidence: 99%

Comparison of Bacterial Community Structure and Diversity in Traditional Gold Mining Waste Disposal Site and Rice Field by Using a Metabarcoding Approach

Fatimawali

Kepel

Gani

et al. 2020

International Journal of Microbiology

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Traditional small-scale gold mining mostly use mercury to extract the gold from ores. However, mercury contamination in the environment can affect the composition and structure of the bacterial community. The purpose of this study was to determine the effect of mercury contamination on the bacterial community in the traditional gold mining waste disposal site and in the rice field. Mercury analysis was carried out using the CVAFS method. Analysis of bacterial communities and structure was carried out based on the results of metabarcoding of the V3-V4 16S rRNA regions obtained from paired-end Illumina MiSeq reads. The results showed that the sample from the mining waste disposal site had a mercury level of 230 mg/kg, while the sample from the rice field had 3.98 mg/kg. The results showed that there were differences in microbial composition and community structure in both locations. With the total reads of 57,031, the most dominant phylum was Firmicutes in the mining disposal site sample. Meanwhile, with the total reads of 33,080, the sample from rice field was dominated by Planctomycetes. The abundant classes of bacteria in the mining waste disposal site, from the highest were Bacilli, Gammaproteobacteria and Planctomycetia, while the sample from the rice field was dominated by the Planctomycetia and Acidobacteria subdivision 6. The families that dominated the sample in disposal site were Bacillaceae and Aeromonadaceae, while the sample from the rice field was dominated by Gemmataceae. The abundant genera in both locations were Bacillus and Gemmata. This study concluded that the high level of mercury in the soil reduced the richness and diversity of bacterial phyla and lower taxa. There was also a shift in the dominance of phyla and lower taxa in both locations. This study provides an understanding of the microbial community structure in the area that is highly contaminated with mercury to open insight into the potential of these bacteria for mercury bioremediation.

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Section: Mercury Level Of Samplesmentioning

confidence: 99%

Comparison of Bacterial Community Structure and Diversity in Traditional Gold Mining Waste Disposal Site and Rice Field by Using a Metabarcoding Approach

Fatimawali

Kepel

Gani

et al. 2020

International Journal of Microbiology

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“…Heating a soil sample for 5 days at 150 1C and measuring the total Hg (HgT) concentration before and after heating is a common method for determining the concentration of Hg(0) l in soils (Guedron et al, 2009;Revis et al, 1989Revis et al, , 1990. This method assumes that only Hg (0) l is liberated from the sample.…”

Section: Introductionmentioning

confidence: 99%

Characterization of soils from an industrial complex contaminated with elemental mercury

Miller

Watson

Lester

et al. 2013

Environmental Research

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“…In vivo methods are the most appropriate way to assess gastrointestinal bioavailability (Canady et al, 1997). To our knowledge, only two studies have attempted to estimate Hg oral bioavailability from soil (Revis et al, 1990; Sheppard et al, 1995). Unfortunately, adult mice were used and the studies were not able to provide reliable estimates of relative bioavailability (ratio of the absorbed Hg fraction from the soil to the absorbed fraction from a standard dosing medium) because of design limitations (Paustenbach et al, 1997; Kelley et al, 2002).…”

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confidence: 99%

Evaluation of Two In Vitro Protocols for Determination of Mercury Bioaccessibility: Influence of Mercury Fractionation and Soil Properties

Welfringer

Zagury

2009

J of Env Quality

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Soil ingestion by children can be a significant exposure pathway to mercury (Hg). Unfortunately, no reliable in vivo results for Hg oral bioavailability determination in soils have been published. In vitro extractions enable the assessment of metals' bioaccessibility, which is an estimate of oral bioavailability. Therefore, the goal of this study was to evaluate two in vitro protocols (CDM (Camp Dresser and Mc Kee Inc.) and IVG (In Vitro Gastrointestinal)) for determination of Hg bioaccessibility in soils using pure Hg-compounds, reference materials (CRM 025-050 and ERM-CC580), and field-collected soils with elevated Hg concentrations. The influence of Hg fractionation and soil properties on Hg bioaccessibility was also investigated. In the field-collected soils, IVG bioaccessibility ranged from 1.5 to 7.5%, and was always below 3.15%, using the CDM method. Mercury bioaccessibility in CRM 025-050 was 61.5 and 34.7%, using IVG and CDM protocols, respectively, whereas Hg bioaccessibility was much lower in the certified sediment sample ERM-CC580 (<7%). Overall, the CDM protocol resulted in lower Hg bioaccessibility values. The water-soluble and exchangeable Hg fraction was highly correlated with gastrointestinal bioaccessibility (r=0.99, p<0.001 for both methods) and this fraction could be a potentially good indicator of Hg bioaccessibility. Because the IVG method is less time-consuming than the CDM protocol and includes organic physiological components which seem to increase Hg bioaccessibility, it might be preferred for determination of Hg bioaccessibility.

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Mercury in soil: A method for assessing acceptable limits

Cited by 49 publications

References 9 publications

Comparison of Bacterial Community Structure and Diversity in Traditional Gold Mining Waste Disposal Site and Rice Field by Using a Metabarcoding Approach

Comparison of Bacterial Community Structure and Diversity in Traditional Gold Mining Waste Disposal Site and Rice Field by Using a Metabarcoding Approach

Characterization of soils from an industrial complex contaminated with elemental mercury

Evaluation of Two In Vitro Protocols for Determination of Mercury Bioaccessibility: Influence of Mercury Fractionation and Soil Properties

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