Synthesis of lanthanum-modified clay soil-based adsorbent for the fluoride removal from an aqueous solution and groundwater through batch and column process: mechanism and kinetics

Bhan, Chandra; Singh, Jiwan; Sharma, Yogesh Chandra; Koduru, Janardhan Reddy

doi:10.1007/s12665-022-10377-x

Cited by 12 publications

(2 citation statements)

References 61 publications

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“…The current methods for the removal of fluoride mainly include ion exchange and coagulation [4,5], membrane technology [6], electrochemical methods, and adsorption methods [7,8]. Among these, the adsorption method has become one of the most promising technologies due to its low cost, convenience of operation, good treatment effects, and low risk of secondary pollution [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Lanthanum-Modified Tea Waste Biochar and Its Adsorption Performance on Fluoride in Water

Li,

Xie,

Zhou

et al. 2024

Materials

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In this study, tea waste was used as a raw material, and TBC (tea waste biochar) was prepared by pyrolysis at 700 °C. La(NO3)3·6H2O was used as the modifier to optimize one-way modification; the orthogonal experiment was undertaken to determine the optimal preparation conditions; and La-TBC (lanthanum-modified biochar) was obtained. The key factors for the adsorption of fluoride by La-TBC were investigated by means of batch adsorption experiments, and kinetics and isothermal adsorption experiments were carried out on the adsorption of fluoride in geothermal hot spring water. The adsorption mechanism of fluoride by La-TBC was analyzed via characterization methods such as SEM-EDS (Scanning Electron Microscope and Energy Dispersive Spectrometer), BET (Brunauer–Emmett–Teller), FTIR (Fourier transform infrared), XRD (X-ray diffraction), and so on. The results show that La-TBC had the best adsorption effect on fluoride at pH 7. The process of adsorption of fluoride follows the pseudo-second-order kinetics and Langmuir isothermal model, and the maximum theoretical adsorption quantity was 47.47 mg/g at 80 °C, while the removal rate of fluoride from the actual geothermal hot spring water reached more than 95%. The adsorption process was dominated by the monolayer adsorption of chemicals, and the mechanisms mainly include pore filling, ion exchange, and electrostatic interaction.

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Section: Introductionmentioning

confidence: 99%

Preparation of Lanthanum-Modified Tea Waste Biochar and Its Adsorption Performance on Fluoride in Water

Li,

Xie,

Zhou

et al. 2024

Materials

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“…In alkaline conditions, NaOH and fluoride in soil minerals are dissolved more effectively than in acidic (Kim et al 2002). Some researchers used lanthanum-modified clay soil as adsorbent for fluoride removal from ground water in batch and column technique (Bhan et al 2022;Zhang et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Thermal and spectroscopic properties of fluoride contaminated soil 21 o 32 ’ 41 ’’ N to 86 o 48 ’ 55 ’’ E of Odisha, India

Sahoo

Jena

Swain

2023

Preprint

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The primary purpose of this investigation is to know thermal properties of soil and extraction of fluoride and its quantitative determination. This study was also carried out to know the fluoride contamination after acid treatment of soil. The specific heat capacity (CP) is measured in heat flux DSC (Differential Scanning Calorimetry) at the heating rate of 2 K min− 1 in an N2 atmosphere using the sapphire standard. The elemental analysis, 19F NMR, TG-DTA, and ATR-IR are carried out for the determination of composition in soil. Fluoride ion is determined using ion selective electrode. This ATR-IR spectrum of soil indicates that Fe, Al and Si, containing fluoride minerals are present in the soil. The CP of this fluoride-contaminated soil is found to be less at higher temperatures and greater at room temperature as compared to other soils. The soil is contaminated with fluoride, confirmed using 19F NMR measurement. The optical band gap calculation from Kubelka–Munk relation indicates that soil is highly insulator. The reflection characteristic is confirmed by Diffuse Reflectance Spectrum (DRS). The concentration of fluoride in 1kg of soil is 12.79 g. as fluoride minerals.The less endothermic behaviour of soil at high temperatures and high endothermic at room temperature further makes the weather extremely hot in summer and cold in winter. The soil still contaminated with fluoride minerals after acid treatment. The minerals release fluoride ion in alkaline medium that is measured using ion selective electrode.

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Fluoride Removal from Water by Using Green Magnetic Activated Carbon Derived from Canola Stalks

Kyzas

Tolkou

Musawi³

et al. 2022

Water Air Soil Pollut

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Synthesis of lanthanum-modified clay soil-based adsorbent for the fluoride removal from an aqueous solution and groundwater through batch and column process: mechanism and kinetics

Cited by 12 publications

References 61 publications

Preparation of Lanthanum-Modified Tea Waste Biochar and Its Adsorption Performance on Fluoride in Water

Preparation of Lanthanum-Modified Tea Waste Biochar and Its Adsorption Performance on Fluoride in Water

Thermal and spectroscopic properties of fluoride contaminated soil 21 o 32 ’ 41 ’’ N to 86 o 48 ’ 55 ’’ E of Odisha, India

Fluoride Removal from Water by Using Green Magnetic Activated Carbon Derived from Canola Stalks

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