Journal ArticleDOI
Phytoextraction: The Use of Plants To Remove Heavy Metals from Soils
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TLDR
The high metal accumulation by some cultivars of B. juncea suggests that these plants may be used to clean up toxic metal-contaminated sites in a process termed phytoextraction.Abstract:
A small number of wild plants which grow on metal contaminated soil accumulate large amounts of heavy metals in their roots and shoots This property may be exploited for soil reclamation if an easily cultivated, high biomass crop plant able to accumulate heavy metals is identified Therefore, the ability of various crop plants to accumulate Pb in shoots and roots was compared While all crop Brassicas tested accumulated Pb, some cultivars of Brassica juncea (L) Czern showed a strong ability to accumulate Pb in roots and to transport Pb to the shoots (1083 mg Pb/g DW in the roots and 345 mg Pb/g DW in the shoots) B juncea was also able to concentrate Cr{sup -6}, Cd, Ni, Zn, and Cu in the shoots 58, 52, 31, 17, and 7 fold, respectively, from a substrate containing sulfates and phosphates as fertilizers The high metal accumulation by some cultivars of B juncea suggests that these plants may be used to clean up toxic metal-contaminated sites in a process termed phytoextractionread more
Citations
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Journal ArticleDOI
Determination of inorganic and organic anions in xylem saps of two contrasting oilseed rape (Brassica juncea L.) varieties: Roles of anions in long-distance transport of cadmium
TL;DR: In this article, the major inorganic and organic anions (chloride, nitrate, malate, sulfate, phosphate and citrate) in xylem saps of two contrasting tolerant oilseed rape (Brassica juncea L.) varieties (the high Cdaccumulating genotype Xikou Huazi and the low Cd-accumulative genotype Liangting Huazi) were determined by graphite furnace atomic absorption spectrometry.
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Lead and zinc extraction potential of two common crop plants, helianthus annuus and brassica napus
TL;DR: In this article, a pot experiment was conducted to investigate the combination effects of plants [sunflower (Helianthus annuus) and canola (Brassica napus)] with soil treatments (manure, sulfuric acid and DTPA).
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A mathematical evolution model for phytoremediation of metals
TL;DR: In this article, the authors developed a system of differential equations to model the plant metal interaction of phytoremediation and proved that there exists a threshold time, $t$*, where the amount of metals in the environment meet a prescribed EPA criteria.
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Pollution due to hazardous glass waste
Deepak Pant,Pooja Singh +1 more
TL;DR: The current review discusses the issues related to quantity and associated risk from the pollutant present in HG and proposes the chemical, biological, thermal, hybrid, and nanotechniques for its management.
Journal ArticleDOI
Comparative Phytoremediation of Chromium‐Contaminated Soils by Fenugreek, Spinach, and Raya
Abstract: A glasshouse investigation was undertaken to evaluate the natural potential of fenugreek (Trigonella foenumgraecum L.), spinach (Spinacia oleracea L.), and raya (Brassica campestris L.) for cleanup of chromium (Cr)–contaminated silty loam and sandy soils. Four kilograms of soil per treatment in earthen pots was treated with five levels of chromium [0, 1.25, 2.5, 5.0, and 10.0 mg Cr kg−1 soil through dipotassium chromate (K2Cr2O7], equilibrated for 21 days at field-capacity moisture content, and then fenugreek, spinach, and raya were grown for 60 days after seeding. The concentration of diethylene triamine pentaacetic acid (DTPA)‐extractable Cr increased significantly with increasing rate of Cr application in both soils, but the increase was higher in sandy soil than in silty loam soil. The DTPA‐extractable Cr in both soils decreased after harvesting of crops compared to its concentration in soil before sowing of the crops. The decrease in DTPA‐extractable Cr concentration was highest in soil grow...