Fluoride sorption from aqueous solution using Al(OH)3-modified hydroxyapatite nanosheet

Huang, Shaomeng; Hu, Minglei; Li, Dan; Wang, Liping; Zhang, Can; Li, Kang; He, Qiang

doi:10.1016/j.fuel.2020.118486

Cited by 24 publications

(8 citation statements)

References 65 publications

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“…Generally, the concentration of interfering ions in actual wastewater was high (Yin et al 2019;Huang et al 2020). In this study, the removal behavior of Hap@BC to U(VI) under different ionic strength (5, 50, 500 mg/L) was studied.…”

Section: Effect Of the Type And Strength Of Interfering Ionsmentioning

confidence: 99%

Design of a renewable hydroxyapatite-biocarbon composite for the removal of uranium(VI) with high-efficiency adsorption performance

Xiong

Ding

Xie

et al. 2022

Biochar

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The hydroxyapatite-loaded swine manure derived-biocarbon was successfully prepared by pyrolysis method for the adsorption of uranium(VI). The results of the adsorption experiments displayed that the adsorption behaviors for uranium(VI) of biocarbon did almost not depend on the interfering ions except Al3+, Ca2+ and CO32−, showing the high selectivity of the composites for uranium(VI). The maximum static and dynamic removal capacity of the hydroxyapatite-biocarbon composites to uranium(VI) were 834.8 and 782.8 mg/g (pH = 3, m/V = 0.1 g/L and T = 298 K), far exceeding other reported biocarbon and hydroxyapatite materials, which indicated that the hydroxyapatite-biocarbon composites possessed an application potential in adsorption. After five cycles of adsorption–desorption processes, the removal efficiency of the hydroxyapatite-biocarbon composite for uranium(VI) was 93.2% (Ci = 5 mg/L, pH = 3, m/V = 0.1 g/L and T = 298 K), revealing that the composite had excellent stability and reusability. Moreover, the capture mechanisms of the hydroxyapatite-biocarbon composite for uranium(VI) included ion exchange and complexation, which was ascribed to the ample active adsorption sites (–OH and PO43−). Therefore, the hydroxyapatite-loaded swine manure derived-biocarbon would be a potential material to effectually separate uranium(VI) from solution. Graphical abstract

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Section: Effect Of the Type And Strength Of Interfering Ionsmentioning

confidence: 99%

Design of a renewable hydroxyapatite-biocarbon composite for the removal of uranium(VI) with high-efficiency adsorption performance

Xiong

Ding

Xie

et al. 2022

Biochar

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“…The adsorption mechanism of fluoride adsorption could be obtained based on the adsorption experiments, XRD and FIIR analysis, and previous studies [25,44]. Generally, two mechanisms (i.e., electrostatic interaction and ion-exchange) can explain the fluoride adsorption of the MFC adsorbent.…”

Section: Adsorption Mechanismsmentioning

confidence: 99%

“…Thathsara et al (2018) synthesized a novel tri-metal composite (Fe-La-Ce) for the removal of excess fluoride in aqueous media with a maximum adsorption capacity (303.03 mg•g −1 at pH 4.00) and excellent regeneration (96.13% desorption) and reusability [24]. Huang et al (2020) proposed an Al (OH) 3 -hydroxyapatite nanosheet (Al (OH) 3 -nHAP) for fluoride sorption from an aqueous solution with a higher defluoridation capacity (194.2 mg•g −1 in neutral condition at 318 K) and a higher removal efficiency of a regenerated Al (OH) 3 -nHAP nanosheet (81.32%) [25]. Kumar et al (2020) advanced both activated alumina (AA) and grinded activated alumina (GAA) for adsorption potential by batch experiments for different contact time, pH, fluoride concentration, and adsorbent dose for fluoride adsorption [26].…”

Section: Introductionmentioning

confidence: 99%

A Novel and Efficient Metal Oxide Fluoride Absorbent for Drinking Water Safety and Sustainable Development

et al. 2021

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Inefficient and non-environmentally friendly absorbent production can lead to much resource waste and go against low carbon and sustainable development. A novel and efficient Mg-Fe-Ce (MFC) complex metal oxide absorbent of fluoride ion (F−) removal was proposed for safe, environmentally friendly, and sustainable drinking water management. A series of optimization and preparation processes for the adsorbent and batch experiments (e.g., effects of solution pH, adsorption kinetics, adsorption isotherms, effects of coexisting anions, as well as surface properties tests) were carried out to analyze the characteristics of the adsorbent. The results indicated that optimum removal of F− occurred in a pH range of 4–5.5, and higher adsorption performances also happened under neutral pH conditions. The kinetic data under 10 and 50 mg·g−1 were found to be suitable for the pseudo-second-order adsorption rate model, and the two-site Langmuir model was ideal for adsorption isotherm data as compared to the one-site Langmuir model. According to the two-site Langmuir model, the maximum adsorption capacity calculated at pH 7.0 ± 0.2 was 204 mg·g−1. The adsorption of F− was not affected by the presence of sulfate (SO42−), nitrate (NO3−), and chloride (Cl−), which was suitable for practical applications in drinking water with high F− concentration. The MFC adsorbent has an amorphous structure, and there was an exchange reaction between OH− and F−. The novel MFC adsorbent was proven to have higher efficiency, better economy, and environmental sustainability, and be more environmentally friendly.

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“…However, AA is unstable under acidic or alkaline conditions, and thereby aluminum-containing salts like Al 2 (SO 4 ) 3 and NaAlO 2 rather than alkali are often used to regenerate the exhausted adsorbents . Also, the wide application of AA is hindered by the possible leaching of Al 3+ and the tendency to harden during long-term runs. , With respect to HAP, the adsorption toward fluoride is mainly associated with the exchange between the interlaminar hydroxide ions, yet the leaching of phosphorus and difficulty in complete regeneration of the exhausted adsorbent still retard its application in full-scale water treatment. , …”

Section: Introductionmentioning

confidence: 99%

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

Deng

Cheng

et al. 2022

ACS EST Eng.

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Fluoride contamination in groundwater is a global issue. Nanoscale oxides of Zr(IV), Al(III), and Ti(IV) can form the inner-sphere complex with fluoride through ligand exchange, offering a new chance for efficient groundwater purification. However, pilot-scale field demonstration of nanotechnology in groundwater defluoridation is very rare. Herein, we conducted a 150-day field defluoridation study using the nanocomposite HZO@D201, which was prepared by encapsulating nano-hydrated zirconium oxide (HZO) inside the strongly basic anion exchanger D201. The HZO@D201 beads were packed in five-stage series columns (40 L for each column), and the groundwater was pumped through the columns sequentially. The effective treatment amount for the single column ([F–] < 1.0 mg/L) exceeded ∼3000 bed volume (BV). The exhausted HZO@D201 was fully refreshed through ex situ treatment with NaOH–NaCl solution for repeated use without significant loss in defluoridation reactivity. Owing to the specific interaction with HZO, the fluoride concentration could be steadily reduced below 1.0 mg/L throughout the 150-day field demonstration, while the common anions coexisting in groundwater (K+, Na+, Ca2+, Mg2+, SO4 2–, Cl–, etc.) remained almost unchanged. The operational cost for deep defluoridation was estimated as 0.574 RMB per ton of groundwater, much less than that of the widely studied reverse osmosis. TEM, XPS, and Fourier transform infrared (FTIR) analysis indicated that negligible change occurred in the structure and chemical composition of HZO@D201 after the long-term field assay. This study may inspire more attempts at the pilot scale and engineering demonstration of nano-enabled water treatment techniques.

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Fluoride sorption from aqueous solution using Al(OH)3-modified hydroxyapatite nanosheet

Cited by 24 publications

References 65 publications

Design of a renewable hydroxyapatite-biocarbon composite for the removal of uranium(VI) with high-efficiency adsorption performance

Design of a renewable hydroxyapatite-biocarbon composite for the removal of uranium(VI) with high-efficiency adsorption performance

A Novel and Efficient Metal Oxide Fluoride Absorbent for Drinking Water Safety and Sustainable Development

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

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