Stabilising fluoride in contaminated soils with monocalcium phosphate and municipal solid waste compost: microbial, biochemical and plant growth impact

Chahine, Sara; Garau, Giovanni; Castaldi, Paola; Pinna, Maria Vittoria; Melito, Sara; Seddaiu, Giovanna; Roggero, Pier Paolo

doi:10.1007/s11356-021-17835-2

Cited by 8 publications

(4 citation statements)

References 62 publications

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“…Fluorine (F), the most electronegative and reactive element of the periodic table, is widely found either in the form of mineral fluoride (F − ) salts, including the free F − anion itself, or as organofluorine compounds (Cheng & Ma, 2021 ; Greenwood & Earnshaw, 1984 ; Gribble, 2002 ). Estimated to be the 13th most abundant element in the Earth crust, F is widespread in soils and water (Chahine et al, 2022 ; Mason & Moore, 1982 ). Although the concentration of F − tends to be rather low in unpolluted areas, its abundance can locally increase to rather significant levels as a result of natural phenomena, e.g.…”

Section: Introductionmentioning

confidence: 99%

Role of the CrcB transporter of Pseudomonas putida in the multi‐level stress response elicited by mineral fluoride

Calero

Gurdo

Nikel

2022

Environmental Microbiology

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The presence of mineral fluoride (F−) in the environment has both a geogenic and anthropogenic origin, and the halide has been described to be toxic in virtually all living organisms. While the evidence gathered in different microbial species supports this notion, a systematic exploration of the effects of F− salts on the metabolism and physiology of environmental bacteria remained underexplored thus far. In this work, we studied and characterized tolerance mechanisms deployed by the model soil bacterium Pseudomonas putida KT2440 against NaF. By adopting systems‐level omic approaches, including functional genomics and metabolomics, we gauged the impact of this anion at different regulatory levels under conditions that impair bacterial growth. Several genes involved in halide tolerance were isolated in a genome‐wide Tn‐Seq screening—among which crcB, encoding an F−‐specific exporter, was shown to play the predominant role in detoxification. High‐resolution metabolomics, combined with the assessment of intracellular and extracellular pH values and quantitative physiology experiments, underscored the key nodes in central carbon metabolism affected by the presence of F−. Taken together, our results indicate that P. putida undergoes a general, multi‐level stress response when challenged with NaF that significantly differs from that caused by other saline stressors. While microbial stress responses to saline and oxidative challenges have been extensively studied and described in the literature, very little is known about the impact of fluoride (F−) on bacterial physiology and metabolism. This state of affairs contrasts with the fact that F− is more abundant than other halides in the Earth crust (e.g. in some soils, the F− concentration can reach up to 1 mg gsoil−1). Understanding the global effects of NaF treatment on bacterial physiology is not only relevant to unveil distinct mechanisms of detoxification but it could also guide microbial engineering approaches for the target incorporation of fluorine into value‐added organofluorine molecules. In this regard, the soil bacterium P. putida constitutes an ideal model to explore such scenarios, since this species is particularly known for its high level of stress resistance against a variety of physicochemical perturbations.

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Section: Introductionmentioning

confidence: 99%

Role of the CrcB transporter of Pseudomonas putida in the multi‐level stress response elicited by mineral fluoride

Calero

Gurdo

Nikel

2022

Environmental Microbiology

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“…After soil incubation with biochar, soil microbial biomass C (SMB-C) was quantified in triplicate soil aliquots (40 g) from each mesocosm using the chloroform fumigation extraction method as previously reported [ 32 ]. Briefly, 20 g of each soil sample were fumigated in the dark at 25 °C with ethanol-free chloroform for 24 h, while the remaining 20 g were directly extracted with 80 mL of 0.5 M K 2 SO 4 for 1 h (orbital shaker, 40 rpm).…”

Section: Methodsmentioning

confidence: 99%

Using biochar for environmental recovery and boosting the yield of valuable non-food crops: The case of hemp in a soil contaminated by potentially toxic elements (PTEs)

Garau,

Lo Cascio,

Vasileiadis

et al. 2024

Heliyon

Self Cite

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“…An excessive application rate affects the physical and chemical properties of soil, causing acidification and hardening, and affecting crop growth. For example, nano-passivation materials affect soil aggregate structure and nutrient availability, and their excessive use reduces crop yield Field and pot experiments [66,77,89,90] An excessive application amount and an excess of passivation material cause secondary pollution. For example, an excessive amount of phosphate amendment applied causes phosphorus loss…”

Section: Remediation Treatmentmentioning

confidence: 99%

Whole-Process Risk Management of Soil Amendments for Remediation of Heavy Metals in Agricultural Soil—A Review

Feng

Cheng²

2023

IJERPH

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Reducing the mobility and bioavailability of heavy metals in soils by adding exogenous materials is a technology for remediating soils contaminated with heavy metals. Unlike industrial sites, the use of such techniques in agricultural soils requires consideration of not only reducing the mobility of heavy metals but also avoiding adverse effects on soil fertility and the growth of plants. Due to the uncertainty of the stability of amendments applied to agricultural soil, the application of amendments in farmland soil is controversial. This article reviewed the field studies in which amendments were used to immobilize heavy metals, and identified the potential environmental impacts of all aspects of soil amendment usage, including production and processing, transportation, storage, application to soil, long-term stability, and plant absorption. Results of the study indicated that after identifying the environmental risks of the whole process of the application of improvers in agricultural fields, it is necessary to classify the risks according to their characteristics, and design differentiated risk control measures for the safe application of this type of technology.

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Stabilising fluoride in contaminated soils with monocalcium phosphate and municipal solid waste compost: microbial, biochemical and plant growth impact

Cited by 8 publications

References 62 publications

Role of the CrcB transporter of Pseudomonas putida in the multi‐level stress response elicited by mineral fluoride

Role of the CrcB transporter of Pseudomonas putida in the multi‐level stress response elicited by mineral fluoride

Using biochar for environmental recovery and boosting the yield of valuable non-food crops: The case of hemp in a soil contaminated by potentially toxic elements (PTEs)

Whole-Process Risk Management of Soil Amendments for Remediation of Heavy Metals in Agricultural Soil—A Review

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