Efficient hexavalent chromium removal by nano-cerium oxide functionalized biochar: Insight into the role of reduction

Luo, Kui; Lin, Nengfa; Li, Xue; Pang, Ya; Wang, Liping; Lei, Min; Yang, Qi

doi:10.1016/j.jece.2023.110004

Cited by 8 publications

(2 citation statements)

References 51 publications

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“…BC-Ce Ce(NO 3 ) 3 (CeO 2 ) * impregnationprecipitationpyrolysis Cr(VI) 47.83 [27] NaY@Ce CeCl 3 (cerium hydroxide) * coprecipitation method Sb(III) Sb(V)…”

Section: Methodsmentioning

confidence: 99%

“…Its oxide has been associated with room-temperature ferromagnetism, primarily owing to its abundant oxygen vacancies, indicating a high potential for application as an adsorbent. Several studies [27][28][29][30][31][32] have shown that cerium occurs mainly in the forms of cerium oxide (CeO 2 ) and cerium hydroxide (Ce-OH), and cerium modification can effectively enhance the removal capacity of adsorbents for arsenate, phosphate, and heavy metals (Table 1), and the high phosphate affinity and low cost of cerium renders it a preferred material for phosphorus removal [16,33]. Liu et al [34] used impregnation-roasting-impregnation to load hydrated cerium oxide onto natural zeolite, resulting in the adsorbent HCO-MZ that mainly worked via the interchange of Ce-OH with H 2 PO 4 − or HPO 4 2− , which clearly demonstrated phosphorus removal effects.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method

Zhang,

Zou,

Ren

et al. 2024

Magnetochemistry

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A diatomaceous earth (DE)-based adsorbent DE-Ce was prepared and optimized to remove phosphorus from wastewater. DE was modified through purification–cerium loading, improving its phosphorus adsorption capacity and recycling ability. The preparation conditions were optimized using the Box–Behnken design, and the response surface method was employed to analyze the effects of roasting temperature, cerium concentration, and HCl concentration on the preparation of DE-Ce. Scanning electron microscopy, X-ray fluorescence spectrometry, and X-ray photoelectron spectroscopy were used for characterization, with results indicating that HCl washing can effectively remove impurities. Cerium was mainly loaded onto DE in the form of Ce(OH)3, and pore size and capacity increased following cerium loading, with the formation of a macroporous structure. The obtained DE-Ce adsorbent removed 98.30% phosphorous, with the removal process following the secondary kinetic and Langmuir models. According to material characterization and model analysis results, the phosphorus removal mechanism primarily involves electrostatic adsorption, ligand exchange, and precipitation. Overall, the findings indicate that cerium modification can effectively improve the adsorption capacity of DE.

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“…BC-Ce Ce(NO 3 ) 3 (CeO 2 ) * impregnationprecipitationpyrolysis Cr(VI) 47.83 [27] NaY@Ce CeCl 3 (cerium hydroxide) * coprecipitation method Sb(III) Sb(V)…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method

Zhang,

Zou,

Ren

et al. 2024

Magnetochemistry

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Novel Preparation of Two Oxidized Starch Formulations for Removal of Cr (VI) Ions From an Aqueous Solution

Qin,

Wang,

Zhang

et al. 2024

Starch Stärke

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Hexavalent chromium (Cr(VI)) has attracted much attention because it is a harmful pollutant. In this study, acid hydrolyzed hydrothermal double modified starch (AHS) and hydroperoxide oxidized starch (HOS) are prepared from natural starch and used for the reduction of chromium (VI) in aqueous systems. The effects of hydrothermal acidolysis and oxidative modification of starch on the reduction rate of Cr(VI) are discussed, including the changes of solubility, swelling power, particle size, content of straight‐chain starch, and carbonyl/carboxylic group content. The results of response surface methodology (RSM) optimization show that the influence of reaction conditions on the reduction rate of Cr(VI) by NS is as follows: reaction time > initial pH of solution > reaction temperature > starch to Cr(VI) mass ratio; and on the reduction rate of Cr(VI) by AHS and HOS is as follows: initial pH of solution > reaction time > starch to Cr(VI) mass ratio > reaction temperature.

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A novel nano-cerium oxide functionalized biochar composite for degradation of organic dye: insight of the photocatalysis mechanism

Luo,

Jiang,

Yang

et al. 2024

Environ Sci Pollut Res

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Efficient hexavalent chromium removal by nano-cerium oxide functionalized biochar: Insight into the role of reduction

Cited by 8 publications

References 51 publications

Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method

Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method

Novel Preparation of Two Oxidized Starch Formulations for Removal of Cr (VI) Ions From an Aqueous Solution

A novel nano-cerium oxide functionalized biochar composite for degradation of organic dye: insight of the photocatalysis mechanism

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