Bacteria isolated from e-waste soil enhance plant growth and mobilize trace metals in e-waste-amended soils

Patel, Bhamini; Jinal, Hardik Naik; Chavan, Sonal Manik; Paul, Dhiraj; Amaresan, N.

doi:10.1080/15226514.2022.2118230

Cited by 2 publications

(3 citation statements)

References 40 publications

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“…E-waste-tolerant bacteria (ETB) increase plant development in soils with e-waste amendments while also assisting in the movement of trace metals into the plants. (36) South Africa PCBs and toxic metals (As, Pb, Hg, Cd).…”

Section: Pollutants Results Sourcementioning

confidence: 99%

“…Furthermore, the pollutants from contaminated soil can be absorbed by plants, leading to bioaccumulation within the food chain, ultimately raising concerns for human health as consuming produce grown in contaminated soil could lead to the intake of harmful substances. Soil-dwelling organisms, including microbes and invertebrates, play critical roles in maintaining soil fertility and ecological balance (34)(35)(36). It can hinder essential soil processes, such as nutrient cycling and decomposition, which are fundamental for sustaining healthy ecosystems.…”

Section: Manila Philippinesmentioning

confidence: 99%

“…E-waste pollutants can interfere with cell division and expansion processes in plants, resulting in smaller and distorted leaves. In turn, reduced leaf size diminishes the plant's surface area for photosynthesis, limiting its capacity to capture sunlight and synthesize the nutrients necessary for growth (28,36,(43)(44). Photosynthesis problems and plant productivity disrupt nutrient cycling, carbon sequestration, and habitat provisioning, affecting the stability and functioning of the entire ecosystem.…”

Section: Negative Impact On Plants and Animalsmentioning

confidence: 99%

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Electronic Waste Problem in Developing Nations: Mismanagement, Health Implications, and Circular Economy Opportunities

Rauf

2024

JKL

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Introduction: Electronic waste (e-waste) has emerged as a global concern due to the exponential growth in electronic consumption and inadequate disposal practices, specifically in developing countries. Among the various dimensions of this problem, the contamination of soil with e-waste has garnered significant attention, owing to its profound implications for environmental integrity and human health. Discussion: The soil contamination leads to diverse ecological repercussions, encompassing disruptions in the cycling of nutrients and biodiversity, as well as the potential for contaminants to accumulate in the food chain. Effective management strategies are imperative to address this multifaceted challenge, the implementation of governmental regulations, the adoption of sustainable e-waste recycling practices, and the raising of public awareness campaigns. The circular economy holds great potential for addressing the environmental and economic challenges. To build a more resilient and eco-friendly urban future, collaborative solutions are necessary to address infrastructural, policy, and awareness issues. In many circumstances, waste management is not primarily the government's duty. Non-governmental organizations (NGOs) and the business sector actively participate in trash management efforts through public education events and charity initiatives. This significant revolution has the potential to meaningfully advance smart city development through the use of technology-driven initiatives. Conclusion: By proactively addressing and reducing e-waste contamination in soil, we can mitigate the effects of environmental hazards and safeguard human health from the negative consequences associated with this burgeoning predicament.

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Section: Pollutants Results Sourcementioning

confidence: 99%

Section: Manila Philippinesmentioning

confidence: 99%

Section: Negative Impact On Plants and Animalsmentioning

confidence: 99%

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Electronic Waste Problem in Developing Nations: Mismanagement, Health Implications, and Circular Economy Opportunities

Rauf

2024

JKL

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Screening and identification of plant growth promoting bacteria and their influence on soil heavy metal forms

Deng,

Hu,

et al. 2024

Preprint

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The unregulated dismantling of electronic products has led to heavy metal contamination of soil at electronic waste (e-waste) dismantling sites, causing serious environmental problems and not conductive to environmentally sustainable development. Therefore, four bacterial strains from soil collected from a contaminated e-waste site were screened. The objectives of this study were: to identify plant growth-promoting strains with useful characteristics; to determine the behavior of the strains by various qualitative and quantitative tests; to determine the effect of each strain on the migration of different forms of heavy metals from the soil by shake flask tests; and to determine the mechanisms by which this migration occurs. This study investigated the nitrogen fixation, inorganic phosphorus solubilization, iron carrier production, indole-3-acetic acid secretion, and metal tolerance of each bacterial strain, and used 16S rDNA analysis to determine its taxonomic status and growth characteristics. The 16S rDNA analysis revealed that strains RH1 and RH3 belonged to the genus Rhizobium, and strains MO2 and MO4 belonged to the genus Microbacterium. MO4 had the highest indole-3-acetic acid production capacity of 26.98 mg/L; RH3 had the highest inorganic phosphorus solubilization capacity of 1.33; RH1, MO2, RH3, and MO4 were capable of fixing nitrogen; and MO2 and MO4 were capable of producing iron carriers (MO4 was the most efficient of the two, with an iron carrier activity of up to 35%). A series of shake flask tests showed that the strains affected the levels of different forms of heavy metals and played a mobilizing role. Therefore, they are potentially useful for the remediation of heavy metal contaminated soils. In conclusion, Rhizobium RH3 and Microbacterium MO4 are excellent plant growth-promoting bacteria and have considerable potential for the green remediation of soils contaminated with heavy metals.

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Bacteria isolated from e-waste soil enhance plant growth and mobilize trace metals in e-waste-amended soils

Cited by 2 publications

References 40 publications

Electronic Waste Problem in Developing Nations: Mismanagement, Health Implications, and Circular Economy Opportunities

Electronic Waste Problem in Developing Nations: Mismanagement, Health Implications, and Circular Economy Opportunities

Screening and identification of plant growth promoting bacteria and their influence on soil heavy metal forms

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