Repeated Heat Regeneration of Bone Char for Sustainable Use in Fluoride Removal from Drinking Water

Herath, H M Ayala S; Kawakami, Toru; Tafu, Masamoto

doi:10.3390/healthcare6040143

Cited by 10 publications

(3 citation statements)

References 13 publications

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“…Several conventional techniques may be pointed here, such as adsorption [ 61 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 86 , 87 , 88 , 89 , 90 , 91 ], chemical precipitation [ 86 , 92 ], coagulation and precipitation methods [ 72 , 93 , 94 , 95 , 96 , 97 , 98 , 99 ], ion exchange [ 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 ], and electrocoagulation [ 69 , 77 , 86 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 ], as well as more advanced membrane processes [ 83 , 124 …”

Section: Selected Types Of Reagents For Fluoride Removalmentioning

confidence: 99%

Management of Solid Waste Containing Fluoride—A Review

2022

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Technological and economic development have influenced the amount of post-production waste. Post-industrial waste, generated in the most considerable amount, includes, among others, waste related to the mining, metallurgical, and energy industries. Various non-hazardous or hazardous wastes can be used to produce new construction materials after the “solidification/stabilization” processes. They can be used as admixtures or raw materials. However, the production of construction materials from various non-hazardous or hazardous waste materials is still very limited. In our opinion, special attention should be paid to waste containing fluoride, and the reuse of solid waste containing fluoride is a high priority today. Fluoride is one of the few trace elements that has received much attention due to its harmful effects on the environment and human and animal health. In addition to natural sources, industry, which discharges wastewater containing F− ions into surface waters, also increases fluoride concentration in waters and pollutes the environment. Therefore, developing effective and robust technologies to remove fluoride excess from the aquatic environment is becoming extremely important. This review aims to cover a wide variety of procedures that have been used to remove fluoride from drinking water and industrial wastewater. In addition, the ability to absorb fluoride, among others, by industrial by-products, agricultural waste, and biomass materials were reviewed.

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Section: Selected Types Of Reagents For Fluoride Removalmentioning

confidence: 99%

Management of Solid Waste Containing Fluoride—A Review

2022

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“…Especially, in China, the fluorine pollution in soil is of serious concern, as it is causing a greater negative impact on human health and ecological environment ( 1 ). The situation of fluorosis in 20 countries showed that about 260 million people suffer from fluorosis caused by various fluorine sources ( 2 ). In 1997, fluorosis in China showed that about 31 million people showed signs of fluorosis ( 3 ), including about 21 million dental fluorosis patients and 10 million skeletal fluorosis patients (DDCMH, China).…”

Section: Introductionmentioning

confidence: 99%

Effect of Fluoride on Cytotoxicity Involved in Mitochondrial Dysfunction: A Review of Mechanism

Wei

Ali

et al. 2022

Front. Vet. Sci.

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Fluoride is commonly found in the soil and water environment and may act as chronic poison. A large amount of fluoride deposition causes serious harm to the ecological environment and human health. Mitochondrial dysfunction is a shared feature of fluorosis, and numerous studies reported this phenomenon in different model systems. More and more evidence shows that the functions of mitochondria play an extremely influential role in the organs and tissues after fluorosis. Fluoride invades into cells and mainly damages mitochondria, resulting in decreased activity of mitochondrial related enzymes, weakening of protein expression, damage of respiratory chain, excessive fission, disturbance of fusion, disorder of calcium regulation, resulting in the decrease of intracellular ATP and the accumulation of Reactive oxygen species. At the same time, the decrease of mitochondrial membrane potential leads to the release of Cyt c, causing a series of caspase cascade reactions and resulting in apoptosis. This article mainly reviews the mechanism of cytotoxicity related to mitochondrial dysfunction after fluorosis. A series of mitochondrial dysfunction caused by fluorosis, such as mitochondrial dynamics, mitochondrial Reactive oxygen species, mitochondrial fission, mitochondrial respiratory chain, mitochondrial autophagy apoptosis, mitochondrial fusion disturbance, mitochondrial calcium regulation are emphasized, and the mechanism of the effect of fluoride on cytotoxicity related to mitochondrial dysfunction are further explored.

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“…F-containing wastewater can be treated by chemical precipitation method [20,21], coagulation and precipitation method [22,23], adsorption method [24][25][26][27][28][29], electrocoagulation method [20,[30][31][32][33], reverse osmosis method [34][35][36], and ion exchange method [37,38]. Generally, chemicals such as CaCl 2 and CaO are added for precipitating fluoride in wastewater.…”

Section: Introductionmentioning

confidence: 99%

Precipitation Methods Using Calcium-Containing Ores for Fluoride Removal in Wastewater

et al. 2019

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F-containing wastewater does great harm to human health and the ecological environment and thus needs to be treated efficiently. In this paper, the new calcium-containing precipitant calcite and aided precipitant fluorite were adopted to purify F-containing wastewater. Relevant reaction conditions, such as reaction time, oscillation rate, dosage of hydrochloric acid, calcite dosage and the assisting sedimentation performance of fluorite, and action mechanism are analyzed. The experiment showed that the removal rate of fluoride in simulated wastewater reached 96.20%, when the reaction time, the dosage of calcite, the dosage of 5% dilute hydrochloric acid, and the oscillation rate was 30 min, 2 g/L, 21.76 g/L, and 160 r/min, respectively. Moreover, the removal rate of fluoride in the actual F-containing smelting wastewater reaches approximately 95% under the optimum condition of calcite dosage of 12 g/L, reaction time of 30 min, and oscillation rate of 160 r/min. The addition of fluorite significantly improves the sedimentation performance of the reactive precipitates. The experimental results showed that calcite and fluorite can effectively reduce the concentration of fluoride ions in F-containing wastewater and solve the problem of slow sedimentation of reactive precipitates.

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Repeated Heat Regeneration of Bone Char for Sustainable Use in Fluoride Removal from Drinking Water

Cited by 10 publications

References 13 publications

Management of Solid Waste Containing Fluoride—A Review

Management of Solid Waste Containing Fluoride—A Review

Effect of Fluoride on Cytotoxicity Involved in Mitochondrial Dysfunction: A Review of Mechanism

Precipitation Methods Using Calcium-Containing Ores for Fluoride Removal in Wastewater

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