Impacts of soil and water fluoride contamination on the safety and productivity of food and feed crops: A systematic review

Rizzu, Margherita; Tanda, Alberto; Cappai, Chiara; Roggero, Pier Paolo; Seddaiu, Giovanna

doi:10.1016/j.scitotenv.2021.147650

Cited by 50 publications

(23 citation statements)

References 73 publications

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“…Baunthiyal and Ranghar [213] estimated the fluoride accumulation capacity of plants after a series of experiments. Plants tend to accumulate fluoride mainly in their root system [214]. Fluoride accumulation at higher levels has been found in roots compared to shoots for four different rice varieties [211].…”

Section: Fluoride Uptake and Bioaccumulation In Plants And Foodsmentioning

confidence: 91%

“…Loquat trees (Eriobotrya Japonica) exhibited adverse responses to fluoride air pollution as harmful effects on foliar water status, photosynthetic parameters, photosynthetic pigments, and cell membranes [216]. Fluoride toxicity leads to oxidative stress; a decrease in chlorophyll content; and changes in the concentrations of soluble sugars, nitrogen, proline, betaine, and macro-and micronutrients in plants [214]. Olive plants showed maximum reduction in antioxidant enzymes and mineral contents and an increase in oxidative stress at 80 mM sodium fluoride (NaF) concentrations [215].…”

Section: Fluoride Uptake and Bioaccumulation In Plants And Foodsmentioning

confidence: 99%

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Bioaccumulation of Fluoride in Plants and Its Microbially Assisted Remediation: A Review of Biological Processes and Technological Performance

et al. 2021

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Fluoride is widely found in soil–water systems due to anthropogenic and geogenic activities that affect millions worldwide. Fluoride ingestion results in chronic and acute toxicity, including skeletal and dental fluorosis, neurological damage, and bone softening in humans. Therefore, this review paper summarizes biological processes for fluoride remediation, i.e., bioaccumulation in plants and microbially assisted systems. Bioremediation approaches for fluoride removal have recently gained prominence in removing fluoride ions. Plants are vulnerable to fluoride accumulation in soil, and their growth and development can be negatively affected, even with low fluoride content in the soil. The microbial bioremediation processes involve bioaccumulation, biotransformation, and biosorption. Bacterial, fungal, and algal biomass are ecologically efficient bioremediators. Most bioremediation techniques are laboratory-scale based on contaminated solutions; however, treatment of fluoride-contaminated wastewater at an industrial scale is yet to be investigated. Therefore, this review recommends the practical applicability and sustainability of microbial bioremediation of fluoride in different environments.

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Section: Fluoride Uptake and Bioaccumulation In Plants And Foodsmentioning

confidence: 91%

Section: Fluoride Uptake and Bioaccumulation In Plants And Foodsmentioning

confidence: 99%

Bioaccumulation of Fluoride in Plants and Its Microbially Assisted Remediation: A Review of Biological Processes and Technological Performance

et al. 2021

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“…Soil is the basis of agricultural production. Maintaining paddy soil quality and its ecological function plays vital roles for food production and safety (Rizzu et al., 2021). Aside from soil physicochemical properties, soil bacterial and fungal community structure and diversity are often regarded as important biological indicators to reveal soil quality condition.…”

Section: Introductionmentioning

confidence: 99%

Comparison of soil microbial community and physicochemical properties between rice–fallow and rice–bean (green manure) rotation

Bai

Chu

et al. 2022

Soil Science Soc of Amer J

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Rice (Oryza sativa L.)–fallow and rice–green manure rotation are two common ecological rotation modes in the Lower reaches of the Yangtze River Basin. In this study, based on a long‐term positioning field experiment, soil microbial community structure (bacteria and fungi) and physicochemical properties were investigated and compared to comprehensively evaluate the effects of rice–fallow (RF) and rice–bean (Vicia faba L.) (green manure, RB) rotation on soil health, thus providing scientific basis for the utilization mode of paddy field in winter. The results showed that (a) compared with RF, the contents of soil organic matter (SOM), humic acid (HA), total N, and soil alkaline phosphatase in RB were significantly enhanced by 33.84, 71.04, 35.48, and 54.38%, respectively (p < .01); available K content in RF was increased by 22.84% compared with RB (p < .01); (b) the soil macroaggregates with a diameter more than 0.25 mm (R0.25), mean weight diameter, and geometric mean diameter (GMD) in RB treatment were significantly higher than those of RF by 112.67, 60.25, and 64.88%, respectively (p < .05); (c) different rotations altered bacterial community structure significantly, but exhibited less effect on that of fungi; bulk density, pH, GMD, SOM, and HA were the key environmental factors shaping the bacterial and fungal community structure. The alteration of specific bacterial and fungal taxa revealed that RB had a more promising potential to promote crop growth and improve organic matter decomposition. Therefore, rice–green manure rotation demonstrated a stronger positive effect on soil physicochemical and microbial properties.

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“…Although the WHO recommends uoride consumption to not exceed 1.5 mg/day, it remains extensively hard to maintain this low ingestion level because of the presence of multiple exposure sources [6,7]. Most countries, for example, uoridate their drinking water to the recommended level, but foods, drinks, dental products, and even inhalation represent other signi cant sources of uoride exposure [8,9]. With multiple exposure sources, the majority of the population remains subject to higher levels of uoride daily.…”

Section: Introductionmentioning

confidence: 99%

“…With multiple exposure sources, the majority of the population remains subject to higher levels of uoride daily. Animals and their products have also been found to contain uorinated compounds acquired from their diet [2,3,9]. e greater part of the uoride found in the food has its origin back in the soil and hence, we must nd ways to control the bioavailable amount of uoride in the soil.…”

Section: Introductionmentioning

confidence: 99%

Remediation of Soils Contaminated by Fluoride Using a Fermentation Product of Seaweed (Eucheuma cottonii)

Moirana

Mkunda

Paradelo

et al. 2022

Applied and Environmental Soil Science

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This study investigated the efficacy of fermented seaweed (Eucheuma cottonii) on the remediation of fluoride-contaminated soil. The soil was amended with either 1.25, 3.0, or 5.0% (w/w) fermented seaweed (FSW), parallel with the controls (0%). The amendment improved the physicochemical properties of the soil particularly pH regulated from strong alkaline (9.3) to neutral (7.0) which is essential for germination, crop growth, and yield. The amount of water soluble-fluoride (Ws-F) dropped from 81.7 ± 3.1 mg/kg to 42.7 ± 2.4, 33.7 ± 1.2, 19.6 ± 0.9, and 12 ± 1.3 mg/kg following 0, 1.25, 3, and 5% amendment dosage, respectively. Most of the Ws-F was converted into exchangeable fluoride (Ex-F) and to fluoride-bound to iron and manganese (Fe/Mn-F). Furthermore, the amendment also enhanced microbial mass and diversity in the soil. The FSW contains organic acids which participate in ionic bonding with the multivalent cations in the soil. The formed compound participates in ion exchange with clay or with anionic adsorption to positively charged clay sites at the edges. This interaction is further essential for enhancing the fluoride holding capacity of the soil. The use of seaweed reduced the bioavailability of fluoride in the agricultural soils and had positive effects on promoting soil fertility. However, further studies to observe its effects on crop performance is of significance.

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Impacts of soil and water fluoride contamination on the safety and productivity of food and feed crops: A systematic review

Cited by 50 publications

References 73 publications

Bioaccumulation of Fluoride in Plants and Its Microbially Assisted Remediation: A Review of Biological Processes and Technological Performance

Bioaccumulation of Fluoride in Plants and Its Microbially Assisted Remediation: A Review of Biological Processes and Technological Performance

Comparison of soil microbial community and physicochemical properties between rice–fallow and rice–bean (green manure) rotation

Remediation of Soils Contaminated by Fluoride Using a Fermentation Product of Seaweed (Eucheuma cottonii)

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