Effects and Mechanisms of Microbial Remediation of Heavy Metals in Soil: A Critical Review

Jin, Yuyao; Luan, Yaning; Ning, Yang-cui; Wang, Lingyan

doi:10.3390/app8081336

Cited by 196 publications

(75 citation statements)

References 69 publications

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“…Microbial remediation refers to decreasing the availability of Pb in the environment using indigenous/exotic microbes. Bacterial species such as Alcaligenes sp., Bacillus firmus, Bacillus licheniformis, Enterobacter cloacae, Escherichia coli, Micrococcus luteus, Pseudomonas fluorescens, and Salmonella typhi show adsorption potential of Pb from the contaminated resources [219][220][221][222][223]. Wang et al [224] concluded that bacterial strain B38 (mutant of Bacillus subtilis) has immense potential to remediate heavy metals including Pb in China.…”

Section: Microbial Remediationmentioning

confidence: 99%

Lead Toxicity: Health Hazards, Influence on Food Chain, and Sustainable Remediation Approaches

Kumar

Pinto

Chaturvedi

et al. 2020

IJERPH

631

229

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Lead (Pb) toxicity has been a subject of interest for environmental scientists due to its toxic effect on plants, animals, and humans. An increase in several Pb related industrial activities and use of Pb containing products such as agrochemicals, oil and paint, mining, etc. can lead to Pb contamination in the environment and thereby, can enter the food chain. Being one of the most toxic heavy metals, Pb ingestion via the food chain has proven to be a potential health hazard for plants and humans. The current review aims to summarize the research updates on Pb toxicity and its effects on plants, soil, and human health. Relevant literature from the past 20 years encompassing comprehensive details on Pb toxicity has been considered with key issues such as i) Pb bioavailability in soil, ii) Pb biomagnification, and iii) Pb- remediation, which has been addressed in detail through physical, chemical, and biological lenses. In the review, among different Pb-remediation approaches, we have highlighted certain advanced approaches such as microbial assisted phytoremediation which could possibly minimize the Pb load from the resources in a sustainable manner and would be a viable option to ensure a safe food production system.

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Section: Microbial Remediationmentioning

confidence: 99%

Lead Toxicity: Health Hazards, Influence on Food Chain, and Sustainable Remediation Approaches

Kumar

Pinto

Chaturvedi

et al. 2020

IJERPH

631

229

View full text Add to dashboard Cite

show abstract

“…Microorganisms, which are mostly prokaryotic, participate in redox reactions and change the valance of heavy metals, and thereby, change their activity, which can affect their mobility or toxicity (37). For example, microorganisms such as Rhizopus can absorb heavy metal ions in the soil and Thiobacillus can absorb heavy metal ions as well as inorganic ions, such as S, which combine with the metal ions to form a precipitate that can be separated from the soil (44).…”

Section: Discussionmentioning

confidence: 99%

The effect of organic chelates and gibberellic acid on petroleum hydrocarbons degradation in the soil co-contaminated with Ni and crude oil under canola cultivation

Baghaie

Daliri

2020

Environ Health Eng Manag

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Background: Soil remediation is one the important problem in environmental studies. Thus, this research was conducted to evaluate the effect of organic chelates and gibberellic acid (GA 3 ) on the degradation of crude oil in the soil co-contaminated with Ni and crude oil under canola cultivation. Methods: For treatments, HEDTA and NTA chelates at rates of 0 and 2.5 mmol/kg soil and foliar GA 3 (0 (GA 3 (-) and 0.05 (GA 3 (+) mM) were used. In addition, the soil was polluted with Ni (0 and 100 mg Ni/kg soil) and crude oil at rates of 0, 2, and 4% (W/W). The plant used in this experiment was canola. The concentration of Ni in soil and plant was measured using atomic absorption spectroscopy (AAS). The concentration of total petroleum hydrocarbon (TPH) was measured using GC-mass. The mean differences were calculated according to the least significant difference (LSD) test. Results: The greatest degradation of crude oil belonged to the non-Ni-polluted soil under cultivation of GA 3 -treated plant, while the lowest one was observed in the soil received the greatest level of HEDTA and NTA chelates. Applying 0.05 mM GA 3 foliar significantly increased the degradation of crude oil in soil and Ni in plant shoot by 12.1 and 8.3%, respectively. In addition, soil microbial respiration was also increased by 11.3%. Conclusion: HEDTA, NTA, and GA 3 had a significant effect on the Ni phytoremediation efficiency and degradation of crude oil in soil that is a positive point in environmental pollution. However, the role of soil physico-chemical properties on the phytoremediation efficiency cannot be ignored. Citation: Baghaie AH, Daliri A. The effect of organic chelates and gibberellic acid on petroleum hydrocarbons degradation in the soil co-contaminated with Ni and crude oil under canola cultivation.

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“…Soluble cadmium can be reduced by chemically aided microbes or fixed by microbial absorption thus affecting plant absorption of cadmium (Meng et al., ). The metabolism of microbes produces secretions, such as organic acids, that can dissolve cadmium and other heavy metals in soil; therefore, adding microbial species to the soil, such as bacteria and fungi, can aid in the reduction of soil cadmium (Jin, Luan, Ning, & Wang, ). Cadmium also binds strongly to soils with higher organic matter (higher cation exchange capacity) making cadmium less available to plant life (ATSDR, ; Roberts, ).…”

Section: Cadmium In Plantsmentioning

confidence: 99%

Cadmium: Mitigation strategies to reduce dietary exposure

Schaefer

Dennis

Fitzpatrick

2020

Journal of Food Science

129

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Cadmium has long been recognized as an environmental contaminant that poses risks to human health. Cadmium is of concern since nearly everyone in the general population is exposed to the metal through the food supply and the ability of the element to accumulate in the body over a lifetime. In support of the United States Food and Drug Administration's (FDA) Toxic Element Working Group's efforts to reduce the risks associated with elements in food, this review sought to identify current or new mitigation efforts that have the potential to reduce exposures of cadmium throughout the food supply chain. Cadmium contamination of foods can occur at various stages, including agronomic production, processing, and consumer preparation for consumption. The presence of cadmium in food is variable and dependent on the geographical location, the bioavailability of cadmium from the soil, crop genetics, agronomic practices used, and postharvest operations. Although there are multiple points in the food supply system for foods to be contaminated and mitigations to be applied, a key step to reducing cadmium in the diet is to reduce or prevent initial uptake by plants consumed as food or feed crops. Due to complex interactions of soil chemistry, plant genetics, and agronomic practices, additional research is needed. Support for field-based experimentation and testing is needed to inform risk modeling and to develop practical farm-specific management strategies. This study can also assist the FDA in determining where to focus resources so that research and regulatory efforts can have the greatest impact on reducing cadmium exposures from the food supply.Practical Application: The presence of cadmium in food is highly variable and highly dependent on the geographical location, the bioavailability of cadmium from the soil, crop genetics, and agronomic practices used. This study can assist the FDA in determining where to focus resources so that research and regulatory efforts can have the greatest impact on reducing cadmium exposures from the food supply.

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Effects and Mechanisms of Microbial Remediation of Heavy Metals in Soil: A Critical Review

Cited by 196 publications

References 69 publications

Lead Toxicity: Health Hazards, Influence on Food Chain, and Sustainable Remediation Approaches

Lead Toxicity: Health Hazards, Influence on Food Chain, and Sustainable Remediation Approaches

The effect of organic chelates and gibberellic acid on petroleum hydrocarbons degradation in the soil co-contaminated with Ni and crude oil under canola cultivation

Cadmium: Mitigation strategies to reduce dietary exposure

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