Effect of bentonite on heavy metal uptake by amaranth (Amaranthus blitum cv. Pusa Kirti) grown on metal contaminated soil
Open accessAbstract
A pot culture experiment was conducted to assess the effect of bentonite application on heavy metal uptake by amaranth (Amaranthus blitum cv. Pusa Kirti). Amendment of soil with bentonite @ 2.5% significantly improved the plant growth by 76.5 and 41.7% in first and second harvest, respectively. The metal concentration of amaranth reduced by 6.5 & 21.2% for Zn, 30.5 & 29.9% for Cu and 34.4 & 40.2% for Ni at first and second harvest, respectively on application of 2.5% bentonite. Amending the soil with bentonite (2.5%) significantly decreased the bioconcentration factor (BCF) of metals by 74 and 28% for Zn, 38 and 36% for Cu, 44 and 34% for Ni at first and second harvest, respectively. The hazard quotient (HQ) for metal uptake through consumption of amaranth was significantly reduced by application of bentonite @ 2.5% as it immobilises heavy metals in polluted soil.
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Reduction in PTE mobility in bentonite-amended soil can be attributed to bentonite's larger surface area and stronger sorptive capacity.
“Reduction in PTE mobility in bentonite-amended soil can be attributed to bentonite's larger surface area and stronger sorptive capacity (Kumararaja et al., 2016).”
From Soil amendments for immobilization of potentially toxic elements in contaminated soils: A critical review (2020) · cites this paper as Kumararaja et al., 2016
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“Reduction in PTE mobility in bentonite-amended soil can be attributed to bentonite's larger surface area and stronger sorptive capacity (Kumararaja et al., 2016).”
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- Authors
- Kumararaja, P., Shabeer, T. P. A., & Manjaiah, K. M.
- Venue
- Indian Journal of Horticulture
- Published
- 2016
- Volume
- 73
- Issue
- 2
- Pages
- 224
- ISSN
- 0972-8538 (ISSN-L)
- 0974-0112
- OpenAlex
- W2478693012
- Cited by
- 10
- References
- 0
- Citations by year
- 2026: 1 · 2025: 3 · 2023: 1 · 2020: 1 · 2019: 3 · 2018: 1
- FWCI
- 0.73
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- cc-by
- Locations
- Indian Journal of Horticulture (publishedVersion, cc-by)
- Topics
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Physical Sciences › Chemistry › Analytical Chemistry › Heavy Metals in Plants
- Physical Sciences › Environmental Science › Water Science and Technology › Environmental and Analytical Chemistry Studies
- Keywords
- bentonite, heavy metal uptake, Amaranthus blitum, metal-contaminated soil, zinc, copper, nickel, bioconcentration factor, hazard quotient, heavy metal immobilization, phytoremediation, soil amendment, plant growth
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