Optimization of adsorption performance of cerium-loaded intercalated bentonite by CCD-RSM and GA-BPNN and its application in simultaneous removal of phosphorus and ammonia nitrogen

Lu, Mingrong; Fang, Shuju; Li, Guizhen; Wang, Wei; Tan, Xuewen; Wu, Wenqi

doi:10.1016/j.chemosphere.2023.139241

Cited by 9 publications

(5 citation statements)

References 42 publications

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Section: Discussionmentioning

confidence: 92%

“…Among the interaction effects, those of the roasting temperature and HCl concentration are the strongest. Combined with the previous experiments, the optimal preparation conditions are a roasting temperature of 550 °C, a cerium concentration of 0.12 mol/L, an HCl concentration of 2.76 mol/L, a transition time of 30 The mechanisms of phosphorus adsorption include electrostatic adsorption, precipitation, and ligand exchange. The overall results show that cerium loading is favorable for improving the adsorption capacity of DE.…”

Section: Discussionmentioning

confidence: 96%

“…24.65 7.28 [28] Cu 45 Zn 3 Ce 1 /AC Ce(NO 3 ) 3 •6H 2 O impregnation method PH 3 61.86 [29] Ce-bentonite cerium sulfate P NH 3 -N 1.261 0.884 [30] CHP cerium hydroxide * hydrothermal method phosphates 86.7 [31] Ce-MIL-101-NH 2 CeCl 3 •eC 2 O (cerium hydroxide) * solvothermal method phosphate As(V) 341.5 249 [32] Note: "*" indicates the loading form of cerium in the materials.…”

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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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

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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“…Among these, adsorption has garnered significant attention due to its advantages of affordability, wide availability, high efficiency, and minimal secondary contamination. A number of different adsorbents have been studied, including activated carbon [14], zeolite [15], bentonite [16], and metal oxides [17]. However, the high cost and low efficiency of these adsorbents limit their largescale application [18].…”

Section: Sulfate (Somentioning

confidence: 99%

Revealing the Role of Coal Gangue-Biochar Composite for Removing SO42− from Water: Adsorption Mechanisms and Application Effects

Chen,

Tang,

et al. 2023

Minerals

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Sulfate ions are commonly found in water, but excessive concentrations of these ions can have detrimental effects on the aquatic environment. In this study, reed straw was chosen as the raw material for producing biochar, which was then pyrolyzed with coal gangue to create environmentally friendly adsorption materials. This innovative approach aims to combat the issue of elevated SO42− concentrations in water while efficiently utilizing solid waste. The results showed that the adsorption process best fit the when the was pH 2 and the dosage was 8 g·L−1, and the adsorption capacity reached the maximum of 49.56 mg·g−1. Via extensive characterization, kinetic studies, and isotherm experiments on the modified biochar, we determined that the mechanism of SO42− adsorption primarily involves electrostatic adsorption, physical adsorption, and chemical adsorption. The toxicology experiments showed that the activity of antioxidant enzymes and the amount of malondialdehyde decreased, and the content of chlorophyll and soluble protein increased. These findings suggest that modified biochar can mitigate the harmful effects of SO42− on reeds to a certain extent, ultimately promoting the growth of these plants.

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Amino-functionalized novel biosorbent for effective removal of fluoride from water: process optimization using artificial neural network and mechanistic insights

Jena,

Bej,

Giri

et al. 2024

Environ Sci Pollut Res

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Optimization of adsorption performance of cerium-loaded intercalated bentonite by CCD-RSM and GA-BPNN and its application in simultaneous removal of phosphorus and ammonia nitrogen

Cited by 9 publications

References 42 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

Revealing the Role of Coal Gangue-Biochar Composite for Removing SO42− from Water: Adsorption Mechanisms and Application Effects

Amino-functionalized novel biosorbent for effective removal of fluoride from water: process optimization using artificial neural network and mechanistic insights

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