Influence of biochar and EDTA on enhanced phytoremediation of lead contaminated soil by Brassica juncea

Rathika, R.; Srinivasan, P.; Alkahtani, Jawaher; Al-Humaid, Latifah; Alwahibi, Mona S.; Mythili, R.; Selvankumar, T.

doi:10.1016/j.chemosphere.2020.129513

Cited by 36 publications

(19 citation statements)

References 40 publications

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“…In another study by Roongtanakiat et al, 42 the application of EDTA to the soil was found to enhance the concentration and uptake of Zn, Mn, and Cu by vetiver grass. In a recent study by Rathika et al, 43 application of EDTA showed enhanced Pb uptake by Brassica juncea by 60.2 mg/g compared to untreated soil (10.0 mg/g). EDTA has been found to modify metal bioavailability resulting in enhanced phytoextraction efficiency and subsequent uptake and translocation in shoots.…”

Section: Resultsmentioning

confidence: 88%

Effects of Heavy Metals on the Yield of Essential Oil From Vetiver Grass Cultivated in Mine Tailings Amended With EDTA and Arbuscular Mycorrhizal Fungi

Kereeditse

Pheko-Ofitlhile

Ultra

et al. 2023

Natural Product Communications

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Background/Objective: Vetiver grass (Vetiveria zizanioides (L.) Nash. Syn. Chrysopogon zizanioides (L.) Roberty; family Poaceae) is well-known for producing essential oil that is commonly used in premier perfumery, food, and pharmaceutical industries. The quality of essential oil produced should be assessed before application in production of various products. Methods/Results: In this study, the yield of essential oil extracted from vetiver grass found in Botswana was assessed after cultivation in mine tailings. The respective influence of chelating agents and microbes such as ethylene diamine tetra-acetic acid (EDTA) and arbuscular mycorrhizal fungi (AMF) on the yield of essential oils was also evaluated. Results obtained showed that vetiver grass grown in mine tailings produced more essential oils compared to unpolluted soils. Vetiver grass grown on sterilized soils yielded only 0.26% of essential oils compared to 0.86% of that cultivated in mine tailings. Furthermore, essential oil yield was increased in soil amended with EDTA (0.95%) and after inoculation with AMF (0.89%). Addition of EDTA and AMF enhanced the uptake of heavy metals by vetiver grass and increased heavy metal stress and thereby making vetiver grass release secondary metabolites in the form of essential oils. It is important to note that even though the mine tailings accumulated high concentrations of heavy metals (As: 47.31 ± 1.40, Cu: 1632.24 ± 38.20, Mn: 402.68 ± 18.21, Ni: 728.26 ± 46.20, Pb: 41.26 ± 5.38, and Zn: 103.97 ± 5.34), very low concentrations of metals were detected in essential oils extracts. Conclusion: This study indicates the ability of vetiver grass to produce more essential oil under heavy metal stress making it useful for both essential oil production and important candidate for phytoremediation.

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Section: Resultsmentioning

confidence: 88%

Effects of Heavy Metals on the Yield of Essential Oil From Vetiver Grass Cultivated in Mine Tailings Amended With EDTA and Arbuscular Mycorrhizal Fungi

Kereeditse

Pheko-Ofitlhile

Ultra

et al. 2023

Natural Product Communications

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“…The plant species tested in this experiment showed a growth capacity not affected by lead contamination. The reason for the selection of these two species is twofold: in addition to their satisfactory performances, as shown in other studies on Pb phytoremediation [53][54][55][56][57], they have recently been recognized as energy crop species, capable of providing a high level of biomass that can be reused in the bioenergy field [58][59][60][61]. This last aspect is currently very relevant as it allows further support for phytoremediation both in economic and sustainability terms.…”

Section: Discussionmentioning

confidence: 99%

Enhanced Lead Phytoextraction by Endophytes from Indigenous Plants

et al. 2021

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Lead (Pb) is one of the most common metal pollutants in soil, and phytoextraction is a sustainable and cost-effective way to remove it. The purpose of this work was to develop a phytoextraction strategy able to efficiently remove Pb from the soil of a decommissioned fuel depot located in Italy by the combined use of EDTA and endophytic bacteria isolated from indigenous plants. A total of 12 endophytic strains from three native species (Lotus cornicolatus, Sonchus tenerrimus, Bromus sterilis) were isolated and selected to prepare a microbial consortium used to inoculate microcosms of Brassica juncea and Helianthus annuus. As for B. juncea, experimental data showed that treatment with microbial inoculum alone was the most effective in improving Pb phytoextraction in shoots (up to 25 times more than the control). In H. annuus, on the other hand, the most effective treatment was the combined treatment (EDTA and inoculum) with up to three times more Pb uptake values. These results, also validated by the metagenomic analysis, confirm that plant-microbe interaction is a crucial key point in phytoremediation.

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“…However, RSR cannot be objectively used to demonstrate the amendment effects (Wan et al, 2023). The total biomass enhancement with biochar can be attributed to the signi cant abridging of metal stress on the plant along with improved chlorophyll content (Rathika et al, 2021).…”

Section: Plant Biomassmentioning

confidence: 99%

Influence of biochar amendment on removal of heavy metal from soils using phytoremediation by C. roseus and Chrysopogon zizanioides

Deka,

Patwa,

Nair

et al. 2024

Preprint

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Advances in sustainable toxic heavy metal treatment technologies are crucial to meet our needs for safer land to develop an urban resilient future. The heavy metals bioaccumulate in the food chain due to its persistence in the soil, which poses a serious challenge to its removal and control. Utilisation of hyperaccumulators to reduce the mobility, accumulation, and toxic impact of heavy metals is a promising and ecologically safe technique. Amendments such as biochar, compost and chelates have shown to enhance the phytoremediation efficiency. The potential soil improvement is influenced by the properties of the amendment, plant and metal heterogeneities. In this study, an organic biochar amendment for the 60-day pot experiment using C. roseus, Chrysopogon zizanioides in a heavy metal contaminated soil was applied. The influence of biochar prepared from sugarcane bagasse biochar on phytoremediation of Pb, Zn and Cd from the soil was explored. Biochar amendment rate of 2% had significant effect on the improvement of the morphological characteristics of the plants in comparison to the control. The soil potassium concentrations increased with amendment rates, while the ammonia and phosphorous reduced beyond an optimum biochar content. Heavy metal concentrations in the soil were consistently lower in the amended soil for both plants. The translocation factor (TF) and bioconcentration factor (BCF) exhibited the phytoextraction and phytostabilisation potential of the plants. However, it remains specific to each contaminant, plant and amendment rate. The insights from this study establishes that the synergy between biochar amendment and the selected medicinal plants improved the phytoremediation efficiency.

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Influence of biochar and EDTA on enhanced phytoremediation of lead contaminated soil by Brassica juncea

Cited by 36 publications

References 40 publications

Effects of Heavy Metals on the Yield of Essential Oil From Vetiver Grass Cultivated in Mine Tailings Amended With EDTA and Arbuscular Mycorrhizal Fungi

Effects of Heavy Metals on the Yield of Essential Oil From Vetiver Grass Cultivated in Mine Tailings Amended With EDTA and Arbuscular Mycorrhizal Fungi

Enhanced Lead Phytoextraction by Endophytes from Indigenous Plants

Influence of biochar amendment on removal of heavy metal from soils using phytoremediation by C. roseus and Chrysopogon zizanioides

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