Availability of Chromium, Nickel and Other Associated Heavy Metals of Ultramafic and Serpentine Soil /Rock and in Plants
نویسندگان
چکیده
This paper reviews the concentration of heavy metals particularly Cr and Ni in the serpentinised and ultramafic soil/rock throughout the different geological regions in the world which are produced due to anthropogenic means or due to natural weathering. Poor nutrient content, low Ca: Mg ratio, higher concentration of heavy metals is major reason for the sparse vegetation on such soil. The vegetation covers present on such area are metal tolerant and some plants turned out to be hyperaccumulator which are economically important and significant for extraction of metals from it. This review further includes different case studies of serpentine/ultramafic soil and plants across the globe. Keywords— Chromium, Nickel, Serpentine Soil, Ultramafic, Hyperaccumulator
منابع مشابه
Potential soil pollution by heavy metals in Kurdistan region, western Iran: the impact of ultramafic bedrock
Ultramafic rocks of the ophiolitic complexes are prone to alteration and degradation, and therefore, ease of mobility of heavy metals such as nickel (Ni), chromium (Cr), cobalt (Co), lead (Pb), and vanadium (V), resulting in environmental hazards. The ultramafic rocks of the ophiolitic realm of Kurdistan province, west of Iran, show field and compositional evidence for such hazardous conditions...
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Background The ubiquity of nickel in the environment and its common presence in food and water mean that humans are constantly exposed to nickel. Although nickel is not acutely toxic at low levels, it is a carcinogen and has been linked to cellular oxidative stress [1]. Soils that develop on serpentinite, a metamorphic rock type derived from ultramafic igneous rocks (and the state rock of Calif...
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Plants on serpentine soils provide extreme examples of adaptation to environment, and thus offer excellent models for the study of evolution at the molecular and genomic level. Serpentine outcrops are derived from ultramafic rock and have extremely low levels of essential plant nutrients (e.g., N, P, K, and Ca), as well as toxic levels of heavy metals (e.g., Ni, Cr, and Co) and low moisture ava...
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Surface soils of Sabzevar zone could be geochemically divided into two groups of serpentine (Se) and non-serpentine (Nse) soils. Serpentine soils have higher MgO, FeOt, CaO, S, Ag, Co, Cr, Cu and Ni and lower SiO2, Al2O3, Na2O, K2O, Be, Li, Sc, Ti, U and V than Nse. In other word, Nse samples have high REE content with fractionated LREE/HREE trends in REE diagrams (ΣREE= 31.89- 58.3 ppm; LaN/Yb...
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Serpentine soils are edaphically stressful environments that host many endemic plant species. In particular, serpentine soils are high in several heavy metals (e.g. nickel, cobalt and chromium) and these high heavy metal concentrations are thought, in part, to lead to varying levels of plant adaptation and soil affinities (i.e. endemic vs. non-endemic plant species). It is unclear, however, whe...
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