Binding, distribution, and plant uptake of mercury in a soil from Oak Ridge, Tennessee, USA

Han, Fengxiang X.; Su, Yachun; Monts, David L.; Waggoner, Charles A.; Plodinec, Milivoj

doi:10.1016/j.scitotenv.2006.02.026

Cited by 153 publications

(86 citation statements)

References 31 publications

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“…It has been estimated that the anthropogenic input of Hg into the environment is as high as 3 9 10 6 kg year -1 (Lamborg et al 2002). Mining-refining is one of the most important anthropogenic sources of Hg in the environment, which accounts for 12% of the global anthropogenic emission of Hg into air (Han et al 2006). The large input of Hg into the environment has resulted in a widespread occurrence of Hg in the entire food chain (Adriano 2001) and caused a series of toxicosis symptoms in animals and human beings.…”

Section: Introductionmentioning

confidence: 99%

“…Recent advances in submicroscopic techniques (e.g., X-ray absorption fine structure, XAFS; X-ray absorption near edge structure, XANES; nearedge X-ray absorption fine structure, CNEXAFS) as well as improvements in such methods of analysis as nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR) and pyrolysis, are very helpful in examining and better understanding the binding of the metal in soil (Weber and Karczewska 2004). At the same time, more and more sophisticated sequential extraction procedures (SEPs) are being developed to examine operationally defined Hg fractions in the solid phase (Biester and Scholz 1997;Adriano 2001;Han et al 2006;Millán et al 2006). The former techniques provide information on structurally or thermally related bonding strength and clearly distinguish Hg forms, including Hg 0 , HgS and organically bound Hg compounds in contaminated soils.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, SEPs have been widely used to study the chemical partitioning, mobility and bioavailability of heavy metals, including Hg in soils and sediments. Numerous SEPs based on the fractionation of heavy metals from soil and sediment samples have been described (Tessier et al 1979;Nirel and Morel 1990;Gómez-Ariza et al 2000;Sánchez et al 2005;Han et al 2006). They use different reagents or extractants that preferentially leach, step-by-step, precipitated, adsorbed or complexed metal, avoiding an attack on the lithogenic residual fraction.…”

Section: Introductionmentioning

confidence: 99%

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Quantification and fractionation of mercury in soils from the Chatian mercury mining deposit, southwestern China

Yang

et al. 2008

Environ Geochem Health

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Contents of total Hg and Hg fraction, organic matter, pH, grain size and chemical composition were measured to investigate the pollution characteristics and binding behavior of Hg in soils collected from the Chatian Hg mining deposit (CMD), southwestern China. The average concentration of Hg concentration in the CMD soils was 155 and 1,315 times higher than that in control soils and Chinese soils, respectively, suggesting that the CMD soils were heavily contaminated by the element. The finding was confirmed by Müller geoaccumulation index assessment with 75% very seriously polluted, 6.25% highly to very highly polluted and 18.75% moderately to highly polluted. Hg sources in the region were natural and anthropogenic: in addition to the pedogenic process and original geochemical situation, human miningrefining activities have also seriously impacted the redistribution of Hg in soils, especially in paddy soils.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantification and fractionation of mercury in soils from the Chatian mercury mining deposit, southwestern China

Yang

et al. 2008

Environ Geochem Health

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“…Examples include the Minamata Bay in Japan, where the local fish-consuming villagers were exposed and poisoned by high levels of methylmercury in their seafood due to contamination by a nearby acetaldehyde production facility (Eto, 2000;Tomiyasu et al, 2006). The Y12 nuclear weapons plant facility at Oak Ridge (TN, USA) used mercury for lithium isotope separation during the 1950s and 1960s, and this resulted in an estimated 75-150 tonnes of mercury inadvertently being released to the local environment, including the East Fork Poplar Creek (Han et al, 2006). Examination of the lower East Fork Poplar Creek floodplain (LEFPCF) soil revealed total mercury concentrations ranging from 42 to 2400 mg Hg g À1 dry weight (Barnett et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

High diversity of bacterial mercuric reductase genes from surface and sub-surface floodplain soil (Oak Ridge, USA)

Øregaard

Sørensen

2007

The ISME Journal

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DNA was extracted from different depth soils (0-5, 45-55 and 90-100 cm below surface) sampled at Lower East Fork Poplar Creek floodplain (LEFPCF), Oak Ridge (TN, USA). The presence of merA genes, encoding the mercuric reductase, the key enzyme in detoxification of mercury in bacteria, was examined by PCR targeting Actinobacteria, Firmicutes or b/c-Proteobacteria. b/c-Proteobacteria merA genes were successfully amplified from all soils, whereas Actinobacteria were amplified only from surface soil. merA clone libraries were constructed and sequenced. b/c-Proteobacteria sequences revealed high diversity in all soils, but limited vertical similarity. Less than 20% of the operational taxonomic units (OTU) (DNA sequences X95% identical) were shared between the different soils. Only one of the 62 OTU was X95% identical to a GenBank sequence, highlighting that cultivated bacteria are not representative of what is found in nature. Fewer merA sequences were obtained from the Actinobacteria, but these were also diverse, and all were different from GenBank sequences. A single clone was most closely related to merA of a-Proteobacteria. An alignment of putative merA genes of genome sequenced mainly marine a-Proteobacteria was used for design of merA primers. PCR amplification of soil a-Proteobacteria isolates and sequencing revealed that they were very different from the genome-sequenced bacteria (only 62%-66% identical at the amino-acid level), although internally similar. In light of the high functional diversity of mercury resistance genes and the limited vertical distribution of shared OTU, we discuss the role of horizontal gene transfer as a mechanism of bacterial adaptation to mercury.

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“…However, there is no universal sequential extraction concerning the individual Hg fraction determination. Several approaches were demonstrated by many authors (Renneberg and Dudas 2001, Sánchez et al 2005, Han et al 2006, Liu et al 2006.…”

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confidence: 99%

Mercury distribution and mobility in contaminated soils from vicinity of waste incineration plant

et al. 2014

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The potential bioavailability of Hg from soil might be estimated by a variety of chemical extraction procedures, differing in the extraction agent, its concentration, the sample weight, and the time of extraction. In this study, a comparative analysis of several extraction methods, commonly used for obtaining the mobile and potentially mobilizable phase of the mercury was carried out. Concentrated HNO 3 , 0.01 mol/L Na 2 S 2 O 3 , 0.05 mol/L EDTA and 0.11 mol/L CH 3 COOH were used as the single extraction agents. Moreover, the sequential extraction was performed. This procedure involved the following fractions: water soluble Hg, Hg extracted in acidic conditions, Hg bound to humic substances, elemental Hg and mercury bound to complexes, and residual Hg. The results showed that even strong acid HNO 3 is unable to release the mercury tightly bound to the soil matrix. This particular method with microwave digestion is commonly used for the estimation of anthropogenic pollution. Conversely, the lowest mercury yield was obtained using the acetic acid as the single extraction agent. In this case, the concentrations were below 0.15% of the total Hg content, which is a proportion generally defined as bioavailable to plants.

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Binding, distribution, and plant uptake of mercury in a soil from Oak Ridge, Tennessee, USA

Cited by 153 publications

References 31 publications

Quantification and fractionation of mercury in soils from the Chatian mercury mining deposit, southwestern China

Quantification and fractionation of mercury in soils from the Chatian mercury mining deposit, southwestern China

High diversity of bacterial mercuric reductase genes from surface and sub-surface floodplain soil (Oak Ridge, USA)

Mercury distribution and mobility in contaminated soils from vicinity of waste incineration plant

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