The effect of soil amendments, i.e., compost, zeolite, and calcium oxide, on the chemical properties of soil contaminated with Cr(III) and Cr(VI) and the uptake of selected heavy metals by spring barley (Hordeum vulgare L.) and maize (Zea mays L.) was determined in a pot experiment. The content of all investigated heavy metals in the tested plants varied significantly in response to the tested soil amendments and increasing concentrations of Cr(III) and Cr(VI). Compost, zeolite, and calcium oxide contributed to an increase in the average yield of the aerial parts of maize plants only in treatments contaminated with Cr(III). The concentrations of Cr, Zn, and Ni in the aerial parts of spring barley and maize were higher in treatments contaminated with Cr(III) than in treatments contaminated with Cr(VI). Calcium oxide induced a significant increase in soil pH relative to the control treatment. In treatments without soil amendments, the average Cr content of soil was higher in pots contaminated with Cr(VI). The concentrations of Zn and Cu in non-amended treatments were negatively correlated with increasing doses of Cr(III) and Cr(VI). Calcium oxide decreased the average content of Cr, Cu, and Ni in all experimental variants. Compost increased the average content of Zn in treatments contaminated with Cr(III) and Cr(IV) relative to non-amended soil.

• Keywords
• Calcium oxide, Chromium contamination, Compost, Soil amendments, Zeolite,
• MeSH
• Chromium analysis   MeSH
• Hordeum MeSH
• Composting methods   MeSH
• Zea mays MeSH
• Soil Pollutants analysis   MeSH
• Oxides MeSH
• Soil chemistry   MeSH
• Environmental Restoration and Remediation methods   MeSH
• Calcium Compounds MeSH
• Zeolites chemistry   MeSH
• Publication type
• Journal Article MeSH
• Names of Substances
• Chromium MeSH
• chromium hexavalent ion MeSH Browser
• Soil Pollutants MeSH
• lime MeSH Browser
• Oxides MeSH
• Soil MeSH
• Calcium Compounds MeSH
• Zeolites MeSH

The experiment was carried out in order to evaluate the effects of trace element immobilizing soil amendments, i.e., chalcedonite, dolomite, halloysite, and diatomite on the chemical characteristics of soil contaminated with Cr and the uptake of metals by plants. The study utilized analysis of variance (ANOVA), principal component analysis (PCA) and Factor Analysis (FA). The content of trace elements in plants, pseudo-total and extracted by 0.01 M CaCl₂, were determined using the method of spectrophotometry. All of the investigated element contents in the tested parts of Indian mustard (Brassica juncea L.) differed significantly in the case of applying amendments to the soil, as well as Cr contamination. The greatest average above-ground biomass was observed when halloysite and dolomite were amended to the soil. Halloysite caused significant increases of Cr concentrations in the roots. The obtained values of bioconcentration and translocation factors observed for halloysite treatment indicate the effectiveness of using Indian mustard in phytostabilization techniques. The addition of diatomite significantly increased soil pH. Halloysite and chalcedonite were shown to be the most effective and decreased the average Cr, Cu and Zn contents in soil.

• Keywords
• aided phytostabilization *, chromium *, soil amendments *, soil pollution *,
• MeSH
• Biodegradation, Environmental MeSH
• Biomass MeSH
• Mustard Plant metabolism   MeSH
• Magnesium chemistry   MeSH
• Clay MeSH
• Hydrogen-Ion Concentration MeSH
• Plant Roots metabolism   MeSH
• Metals chemistry   metabolism   MeSH
• Soil Pollutants chemistry   metabolism   MeSH
• Silicon Dioxide chemistry   MeSH
• Industry MeSH
• Industrial Waste MeSH
• Soil chemistry   MeSH
• Aluminum Silicates chemistry   MeSH
• Calcium Carbonate chemistry   MeSH
• Publication type
• Journal Article MeSH
• Names of Substances
• calcium magnesium carbonate MeSH Browser
• Magnesium MeSH
• Clay MeSH
• Metals MeSH
• Soil Pollutants MeSH
• Silicon Dioxide MeSH
• Industrial Waste MeSH
• Soil MeSH
• Aluminum Silicates MeSH
• Calcium Carbonate MeSH