Speciation of methylmercury in rice grown from a mercury mining area

Li, Lü; Wang, Fei; Meng, Bo; Lemes, Marcos; Feng, Xinbin; Jiang, Guibin

doi:10.1016/j.envpol.2010.06.028

Cited by 51 publications

(28 citation statements)

References 15 publications

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“…The burden of mercury toxicity to ASGM communities is compounded by the bioaccumulation of Hg in food (Holmes et al, 2009, Shao et al, 2013. Meng et al (2011) and Li et al (2010) discovered elevated MeHg in rice grown around tailings contaminated Hg is more 10-100 times higher than other locally grown plantation. Shao et al (2013) stated that MeHg can accumulate in hair during growth (1 cm per month), and hair MeHg concentration can possibly reflect longer-term MeHg exposure.…”

Section: Asgm Status In Indonesiamentioning

confidence: 99%

ASGM status in West Nusa Tenggara Province, Indonesia

Krisnayanti¹

2018

J.Degrade.Min.Land Manage.

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Artisanal Small-Scale Gold Mining (ASGM) obviously contributes to serious environmental and health issue for miners, nearby populations, and larger community when the use of mercury (Hg) occurs. Mercury amalgamation is used as a gold recovery technique by 10-12 million ASGM miners around the world and a predicted around 1000 tonnes of mercury are discharged into the environment every year as a result of poor mining practices. Exposure to mercury can cause serious health effects for future generation, and miners and their families are vulnarable group to expose with mercury vapor and methyl mercury contaminated food in ASGM areas, resulting in increase of levels of mercury in human specimens. Thus, investigating the the effects of mercury on the environment and people health are urgently necessary for developing a better solution to eliminate further mercury contamination to environment in West Nusa Tenggara (WNT) Province. A field survey had been conducted for this research in two main ASGM spots in WNT Province: Sekotong-Lombok island and Taliwang-Sumbawa island. As part of the study, an initial health survey and socio-economic of workers/miners was conducted. Volunteer participants at sampling locations across Sekotong-Lombok and TaliwangSumbawa (exposed; indirect exposed; non exposed groups) answered a questionnaire, and allowed the sampling of hair for subsequent analysis. The ore, tailing, plants and soil samples were also collected for investigating Hg concentration on the substances. The results found that the impact of ASGM on increasing economic activity leading to jobs, income and opportunities for social development is positive. However, there is risk of contamination in soil and plants environment through mining activity and high Hg concentration discovered in human body in a short time of ASGM activity. The environmental sustainability of mining can be better regulated within legalised areas. Environmental monitoring will define unacceptable risk and allow for advanced implementation of remedial measures before an uncontrollable disaster occurs.

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Section: Asgm Status In Indonesiamentioning

confidence: 99%

ASGM status in West Nusa Tenggara Province, Indonesia

Krisnayanti¹

2018

J.Degrade.Min.Land Manage.

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“…Because rice does not contain a lot of beneficial micronutrients associated with fish (e.g., n−3 long-chain polyunsaturated fatty acid, selenium, the essential amino acids, Li et al, 2010aLi et al, , 2010b, the current Reference Doses of MeHg exposures from fish consumption may underestimate the health effects of MeHg exposure from rice consumption. It is urgent and critical to setup the dose-response relationship of MeHg exposure from rice consumption and to reduce the health risk in southern China.…”

Section: Potential Health Riskmentioning

confidence: 99%

Rice consumption contributes to low level methylmercury exposure in southern China

Feng

Yuan

et al. 2012

Environment International

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“…The extractant was centrifuged, and the supernatant was decanted and filtered through a 0.2-mm pore-size hydrophilic polypropylene membrane, and diluted 10 times with ultrapure water. This digestion procedure has been shown to be capable of extracting Hg complexes from the samples yet preserving their molecular identities [14,26].…”

Section: Mehg and Se Speciation Analysismentioning

confidence: 99%

Methylmercury and selenium speciation in different tissues of beluga whales (Delphinapterus leucas) from the western Canadian Arctic

Lemes

Wang

Stern

et al. 2011

Enviro Toxic and Chemistry

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Monitoring data have shown that the total monomethylmercury (CH(3) Hg(+) and its complexes; collectively referred as MeHg hereafter) concentrations in Arctic marine mammals have remained very high in recent decades. Toward a better understanding of the metabolic and toxicological implications of these high levels of MeHg, we report here on the molecular forms of MeHg in the muscle, brain, liver, and kidneys of 10 beluga whales from the western Canadian Arctic. In all tissues analyzed, monomethylmercury was found to be dominated by methylmercuric cysteinate, a specific form of MeHg believed to be able to transport across the blood-brain barrier. Another MeHg-thiol complex, methylmercuric glutathionate, was also detected in the muscle and, to a much lesser extent, in the liver and brain tissues. Furthermore, a profound inorganic Hg peak was detected in the liver and brain tissues, which showed the same retention time as a selenium (Se) peak, suggesting the presence of an Hg-Se complex, most likely an inorganic Hg complex with a selenoamino acid. These results provide the first analytical support that the binding of MeHg with glutathione and Se may have protected beluga whales from the toxic effect of high concentrations of MeHg in their body.

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Speciation of methylmercury in rice grown from a mercury mining area

Abstract: Methylmercury in uncooked rice occurs predominantly as methylmercury-L-cysteinate, which is effectively removed during the cooking process. a r t i c l e i n f o HgCys is converted to other forms of MeHg, the identity and toxicity of which remain elusive.

Cited by 51 publications

References 15 publications

ASGM status in West Nusa Tenggara Province, Indonesia

ASGM status in West Nusa Tenggara Province, Indonesia

Rice consumption contributes to low level methylmercury exposure in southern China

Methylmercury and selenium speciation in different tissues of beluga whales (Delphinapterus leucas) from the western Canadian Arctic

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