Co-remediation of Ni-contaminated soil by halloysite and Indian mustard (Brassica junceaL.)

Abstract

The effects of increasing nickel contamination of soil on the update of selected microelements by Brassica juncea L. in the presence of raw halloysite (RH) and halloysite modified by thermal treatment (calcination) at 650°C (MH) were investigated experimentally. Such treatment causes partial dehydroxylation and enhances mineral-adsorption properties towards cations. In a vegetative-pot experiment, four different levels of Ni contamination, i.e. 0 (control), 80, 160, 240 and 320 mg kg−1 were applied in the form of an analytical-grade NiSO4·7H2O solution mixed thoroughly with the soil. Among the minerals which were added to soil to alleviate the negative impact of Ni on plant biomass, MH had a particularly beneficial effect on the growth of B. juncea L. The amount of Ni, Zn, Cu, Mn, Pb and Cr in Indian mustard depended on the Ni dose and type of accompanying mineral structure. The average accumulation of trace elements in B. juncea L. grown in Ni-contaminated soil follow the decreasing order Mn > Zn > Cu > Ni > Pb > Cr.

Enhanced Phytostabilization of Metal-Contaminated Soil after Adding Natural Mineral Adsorbents

“…The highest reduction of Zn contents (20%) was observed in the aboveground parts of the tested plant species grown in soil containing dolomite, as compared to the uncontaminated soil. These results were similar to another experiment conducted by Radziemska et al [3,14,29], where the heavy metal contents in the aboveground parts of Z. mays, B. juncea, and L. perenne were affected by the application of mineral sorbents (i.e., zeolite, halloysite, limestone, chalcedonite, and dolomite). The roots of the test plat contained 22% more Zn as compared to the control group when dolomite was applied to the soil.…”

“…The results of earlier experiments show a metal immobilizing effect on plant biomass after the application of mineral sorbents (i.e., halloysite, zeolite, limestone, and calcium oxide) in pot experiments [14][15]. The results showed that the growth of the tested plant was signifi -cantly affected by the dose of the Zn-contaminant and the applied amendments.…”

Chemical Composition of Spring Rapeseed Grown in Copper- Contaminated Soil Amended With Halloysite and Zeolite

“…In the work of Wyszkowski and Radziemska [2013a, 2013b, 2010, zeolite increased the average yield of aerial parts of oats, spring barley and maize grown in soil polluted with hexavalent chromium. The application of halloysite to nickel-contaminated soil increased the yield of Brassica juncea (L.) [Radziemska et al, 2016d].…”

Using Compost, Zeolite and Calcium Oxide to Limit the Effect of Chromium (III) and (VI) on the Content of Trace Elements in Plants

“…LSD for: a -chromium form; b -chromium dose; c -kind of neutralizing substance; ** -significant at p = 0.01; * -significant at p = 0.05 whereas in excessive amounts, it may occur in plants in a cation form (Ni 2+ ) (Radziemska et al 2016b, Li et al 2015. In the series without alleviating substances, the average content of Ni in the above-ground parts of spring rapeseed was at a similar level in soils containing Cr(III) and Cr(VI), in contrast to the aftercrop -yellow lupine, where a higher average content of Ni in the plant occurred in pots with Cr(III).…”