Distribution and transport of selenium in Yutangba, China: Impact of human activities

Zhu, Jiangming; Wang, Ning; Li, Shehong; Li, Lü; Su, Hongcan; Liu, Changxiong

doi:10.1016/j.scitotenv.2007.12.019

Cited by 140 publications

(50 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10,11 Selenium poisoning has been wellstudied in the Daba region (Shaanxi) and the Enshi District (Hubei) in China. 9,12,13 The source of Se was identified as weathering of Se-rich shales, volcanic tuff, and coal. 12,13 Mobilization from rocks and sediments can be enhanced by agricultural practices such as irrigation.…”

Section: ■ Introductionmentioning

confidence: 99%

Fate of Selenium in Soils at a Seleniferous Site Recorded by High Precision Se Isotope Measurements

Schilling

Dhillon

Mason

2015

Environ. Sci. Technol.

View full text Add to dashboard Cite

Selenium poisoning is a significant health problem in parts of Punjab, India, which is an area of intense agricultural productivity. To determine the complex soil dynamics that control distribution of Se in this area, we measured concentrations and δ(82/76)Se of bulk Se and individual Se pools in four soil profiles. This was compared against δ(82/76)Se of crops and groundwater used for irrigation. The isotopic composition of bulk Se and component Se pools reveal spatial heterogeneity. The bulk δ(82/76)Se show progressively lower values with increasing soil depth indicating the preferential migration of isotopically lighter Se downward through the soil profile. The δ(82/76)Se of water-soluble Se is isotopically heavier than δ(82/76)Se of adsorbed Se, suggesting Se isotope fractionation by reduction prior to scavenging by reactive minerals in the soil. The organically bound Se is isotopically lighter than water-soluble Se and correlates with the C/N ratio at different soil depths. Thus, Se immobilization by redox cycling controls the biogeochemical Se cycle in the soil. Se isotope ratios help to trace biochemical processes of Se in agricultural seleniferous soils and provide an important assessment for better soil management mitigating Se concentrations of ecotoxicological levels.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Fate of Selenium in Soils at a Seleniferous Site Recorded by High Precision Se Isotope Measurements

Schilling

Dhillon

Mason

2015

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The exposed Permian Se-rich strata comprised carbon-siliceous rocks and carbonaceous shale (known locally as 'stone coal'). The Upper Permian Mokou and Wujiaping Formations contained the highest level of Se (up to 8500 mg/kg) (Zhu et al, 2008). Natural strong weathering of Se-enriched rocks and intense human activities, such as stone coal mining and agricultural soil amendment with coal ash, resulted in stress contamination of Se, V, Mo and other heavy metals in soils and water.…”

Section: Sampling Areamentioning

confidence: 99%

“…There were about 477 cases of human Se poisoning reported during the sixty five years from 1923 to 1987 and more than 10000 cases of swine Se poisoning had been recorred over the past 4 decades in Enshi. In order to investigate the truth behind the selenosis incidence, numerous scientists have carried out a great number of experiments (Yang et al, 1983;Yang and Xia, 1995;Mao et al, 1997;Zheng et al, 1993;Zhu et al, 2008Zhu et al, , 2001Zhu et al, , 2012Fordyce et al, 2000). Previous studies primarily focused on the environmental geochemistry and intake of Se in local inhabitants.…”

Section: Introductionmentioning

confidence: 99%

Accumulation and speciation of selenium in Cardamine sp. in Yutangba Se Mining Field, Enshi, China

Shao

Deng

et al. 2014

Chin. J. Geochem.

View full text Add to dashboard Cite

A naturally selenium-accumulating Cardamine sp. is growing in Yutangba Selenium Mining Field, Enshi area, Hubei Province, China, where the geochemical environment is selenium-enriched and endemic selenosis ever occurred in humans. The present study investigated the characteristics of accumulation, speciation and quantity of selenium in Cardamine sp. with HPLC-ICP-MS. Results show that Cardamine sp. can accumulate Se at most 1427 mg/kg in seedling leaves. Even after the biomass incensement of growing up, the plant still could accumulate Se up to several hundred of mg/kg in concentration. Moreover, the biomass enrichment coefficient (BEC) of Se is exceedingly high, in the seedling leaves mostly, higher than 50 mg/kg; in the range of 43.7-68 mg/kg; and the lowest value is higher than 3 mg/kg in mature fronds. Se is present in the plant predominantly in form of SeCys 2 with the highest concentration in seeds; up to 1081 mg/kg as Se. In contrast, SeCys 2 levels are low during early growth period; they are 136.1 mg/kg as Se in seedling fronds and 39.4 mg/kg as Se in mature fronds, respectively. SeMet concentration is comparatively low; 10.6 mg/kg as Se in seedling frond and 5.3 mg/kg as Se in half mature fronds, respectively. This indicates that Cardamine sp. is extremely efficient in extracting Se from soil and translocating it into its above-ground biomass. Therefore, Cardamine sp., found in Yutangba Se Mining Field may be a new Se hyperaccumulator. It is still uncertain whether the Se-accumulation or detoxification of Cardamine sp. happens through the pathway of SeCys methylated to form Se-methylselenoCys or through the formation of Se-carboxymethyl-selenohomocysteine. Indeed, further study should be carried out on the determination of more Se species to explain the high Se hyperaccumulation in Cardamine sp.

show abstract

“…Although Se is an essential trace element for humans and animals, high concentrations of it are harmful. Long-term exposure to high concentrations of Se may even result in hair and nail loss, and nervous system disorders [14]. Many cases of selenosis have been reported in regions with high Se concentrations [15].…”

mentioning

confidence: 99%

“…Given the large coal consumption in power plants and industry sectors in Shandong, Sb, As, and Se emissions are considered to be the highest in China [12,14,21].…”

mentioning

confidence: 99%

Atmospheric Emissions of As, Sb, and Se from Coal Combustion in Shandong Province, 2005-2014

Fan¹,

Yong²

2016

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Distribution and transport of selenium in Yutangba, China: Impact of human activities

Cited by 140 publications

References 28 publications

Fate of Selenium in Soils at a Seleniferous Site Recorded by High Precision Se Isotope Measurements

Fate of Selenium in Soils at a Seleniferous Site Recorded by High Precision Se Isotope Measurements

Accumulation and speciation of selenium in Cardamine sp. in Yutangba Se Mining Field, Enshi, China

Atmospheric Emissions of As, Sb, and Se from Coal Combustion in Shandong Province, 2005-2014

Contact Info

Product

Resources

About