Other less abundant elements of potential environmental significance

Edwards, R.; Lepp, Nicholas W.; Jones, Kevin C.

doi:10.1007/978-94-011-1344-1_14

Cited by 29 publications

(24 citation statements)

References 15 publications

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“…has a lower affinity for this carrier than K (Edwards et al, 1995). The biological significance of the K-Tl interaction was demonstrated by Siegel and Siegel (1976), that is K-deficient cucumber seedlings are more sensitive to thallium than those provided with an adequate supply of K. According to this study, it seems evident that K can mitigate Tl toxicity and that when K is deficient, the presence of relatively high levels of Tl will bring about the impairing symptoms of overt K deficiency.…”

Section: 41biogeochemistry Of Tlmentioning

confidence: 68%

“…It is generally believed that Tl is present as Tl + , and is transferred to solution in this form (Edwards et al, 1995). It becomes enriched in sediments, especially in strongly reducing environments where organic matter is accumulating under anaerobic conditions.…”

Section: 31soil Geochemistry Of Tlmentioning

confidence: 99%

“…The data cited by Allus et al (1987) showed that cereal grains and cabbages near a German cement factory contained higher thallium with the range of 9.5-45 ppm (DW). Zhang et al (1998) According to Edwards et al (1995) and Sager (1998), green cabbage, turnip-rooted cabbage (kohlrabi) and rape accumulated significant amounts of Tl even from soils with low Tl status, whereas the Tl contents of bush beans and rye grass increased only marginally. For all vegetables investigated, leaves contained much thallium than the roots.…”

Section: Distribution Of Thallium In Plantsmentioning

confidence: 99%

“…These authors also suggested that these thallium accumulators can be used for phytomining for thallium in thallium-rich soils and mine tailings as well as for the soil remediation. The specific food crops with high thallium-accumulation properties such as green cabbage and rape (Lehn and Schoer, 1987;Kurz et al, 1997, Edwards et al, 1995Sager, 1998) may also be regarded as high accumulators of thallium in food crops. It is important to identify the thallium accumulators in food crops, because the high thallium in such accumulators can easily enter the food chain and introduce toxicity to human health.…”

Section: Distribution Of Thallium In Plantsmentioning

confidence: 99%

“…Tl has the ability to yield complexes with sulfurcontaining and phosphorus-containing ligands, leading to a substitution of K at its specific adsorption sites. The NaV K + -ATPase plays the main role in uptake of K + (Edwards et al, 1995). Some explanations for Tl uptake by crops have also been discussed in Section 4.4.1.…”

Section: Impacts Of Groundwater Related Thallium Transfermentioning

confidence: 99%

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Environmental impact of thallium related to the mercury-thallium-gold mineralization in southwest Guizhou Province China

Xiao¹

2001

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Toxic metals associated with metal mineralization and mining are critical targets for environmental studies. Thallium, as a typical toxic metal, has received less attention from a geo-environmental perspective since thallium deposits are relatively rare.This study focuses on natural accumulation of thallium associated with Hg-Tl-(Au) mineralization in the Lanmuchang area in southwest Guizhou Province, China, as a case study for thallium hazard in a geo-environmental perspective. It aims at understanding of the occurrence, the transfer processes and the environmental impacts of thallium related to natural processes and human activity. The distribution and dispersion of thallium together with mercury and arsenic in bedrock, sulfide ore, coals, soil, sediment, ground and surface waters, crops and vegetation have been examined.This study shows that the Lanmuchang area can be characterized as a specific geological context of thallium, mercury and arsenic accumulations. The extensive occurrences of sulfide minerals, such as lorandite, cinnabar, realgar, orpiment and pyrite are the primary carriers of Tl, Hg and As in the rocks and ores. Thallium occurs either as isomorphous substitution in the structure of sulfide minerals of mercury ores, arsenic ores coals, or as a pure thallium mineral lorandite.Tl, Hg and As accumulations are characterized by their high concentrations in rocks/ores, soils, sediments, (sub)surface waters and various crops. The range of thallium concentrations are 33-35000 ppm in sulfide ores, 12-46 ppm in coals, 33-490 ppm in host rocks, 25-1100 ppm in secondary minerals, and 6-330 ppm in outcropped host rocks. Thallium concentrations in soils in the mineralized area range from 53 to 282 ppm, from 21 to 100 ppm in alluvial deposits or foundation soils, from 40 to 46 ppm in slope wash material, and from 2.2 to 29 ppm in undisturbed natural soil. A high concentration has also been observed in sediments, ranging from 10 to 3700 ppm. Thallium concentrations are also high in the deep groundwater of the thallium-mineralized area (13.4-1102 \lg/\), decreasing away from the area to a background level of less than 0.005 |ig/l. In stream water, thallium concentration ranges from 0.3 to 33 jig/1, with marked high contents in downstream sections which likely originated from an unidentified groundwater discharge. In the edible parts of various vegetables and cereals, thallium ranges from 0.21 to 494 ppm (dry weight). The uptake of thallium is more pronounced in vegetables than in cereals, and the highest accumulation occurs in green cabbage.The dispersion of thallium together with mercury and arsenic in the specific ecosystem of Lanmuchang is constrained by the original Tl-Hg-As sulfide mineralization, the specific topography and hydro-geomorphology, and by the disturbance of human activity. High values of thallium are concentrated in the mineralized and mining area; away from this area, thallium concentrations decreases gradually to a background level. Thallium from bedrocks is accumulated in soils, se...

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Section: 41biogeochemistry Of Tlmentioning

confidence: 68%

Section: 31soil Geochemistry Of Tlmentioning

confidence: 99%

Section: Distribution Of Thallium In Plantsmentioning

confidence: 99%

Section: Distribution Of Thallium In Plantsmentioning

confidence: 99%

Section: Impacts Of Groundwater Related Thallium Transfermentioning

confidence: 99%

See 3 more Smart Citations

Environmental impact of thallium related to the mercury-thallium-gold mineralization in southwest Guizhou Province China

Xiao¹

2001

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Gold and Uranium

Pulford

2010

Trace Elements in Soils

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Damage suffered by swamp morning glory (Ipomoea aquatica Forsk) exposed to vanadium (V)

Cui

Yang

2015

Environmental Toxicology and Chemistry

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To elucidate the physiological and morphological responses generated by vanadium (V) in plants, hydroponic culture experiments were performed with swamp morning glory (Ipomoea aquatica Forsk) exposed to 0 mg L À1 to 2.50 mg L À1 pentavalent V [V(V)] in Hoagland nutrient solutions. The concentration of chlorophyll a, chlorophyll b, and carotene peaked at a V(V) concentration of 0.05 mg L À1 and gradually decreased at higher V(V) concentrations. Similarly, the plant biomass was stimulated at low levels of V(V) and was inhibited when V(V) concentrations exceeded 0.1 mg L À1 . Pentavalent V had negative effects on the uptake of phosphorus (P) by roots, shoots, and leaves. The biological absorption coefficients of V of the roots were higher than those of the aerial parts. Under low concentrations of V(V) exposure, the predominant species of V in the aerial parts was tetravalent V [V(IV)], whereas V(V) became more prevalent when concentrations of V(V) in the solution was higher than 0.50 mg L À1. In the roots, however, the concentrations of V(V) were always higher than those of the V(IV), except in the control group. Organelles in the V(V)-treated leaves were distorted, and the periplasmic space became wider. These results indicate V(V) has concentration-dependent effects on the physiological properties of swamp morning glory, whereas the plant has the ability to develop self-protective function to adapt to the toxicity of V(V). Environ Toxicol Chem 2016;35:695-701. # 2015 SETAC

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Other less abundant elements of potential environmental significance

Cited by 29 publications

References 15 publications

Environmental impact of thallium related to the mercury-thallium-gold mineralization in southwest Guizhou Province China

Environmental impact of thallium related to the mercury-thallium-gold mineralization in southwest Guizhou Province China

Gold and Uranium

Damage suffered by swamp morning glory (Ipomoea aquatica Forsk) exposed to vanadium (V)

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