Removal of boron by a modified resin in fixed bed column: Breakthrough curve analysis using dynamic adsorption models and artificial neural network model

Bai, Shuqin; Li, Jiaxin; Ding, Wei; Chen, Shuxuan; Ya, Ru

doi:10.1016/j.chemosphere.2022.134021

Cited by 41 publications

(28 citation statements)

References 44 publications

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“…Taking these aspects into consideration, it is worth noting that the studied models can be utilized for the estimation of ethacridine lactate biosorption on the prepared adsorbent material. Similar outcomes were described in the research piloted by Bai et al [53], who stipulated that the different models are appropriate for different aims.…”

Section: Biosorption Column Modelingsupporting

confidence: 67%

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Biosorptive Removal of Ethacridine Lactate from Aqueous Solutions by Saccharomyces pastorianus Residual Biomass/Calcium Alginate Composite Beads: Fixed-Bed Column Study

et al. 2022

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In this study, ethacridine lactate removal from aqueous solution using a biosorbent material based on residual microbial biomass and natural polymers in fixed-bed continuous column was investigated. Composite beads of Saccharomyces pastorianus residual biomass and calcium alginate were obtained by immobilization technique. The prepared biosorbent was characterized by Fourier transformed infrared spectroscopy, scanning electron microscopy, and analysis of point of zero charge value. Then, laboratory-scale experiments by fixed-bed column biosorption were conducted in continuous system. To this purpose, the column bed high (5 cm; 7.5 cm), initial pollutant concentration (20 mg/L; 40 mg/L), and solution flow through the column (0.6 mL/min; 1.5 mL/min) were considered the main parameters. Recorded breakthrough curves suggest that lower flow rates, greater bed heights, and a lower concentration of ethacridine lactate led to an increased biosorption of the target compound. The biosorption dynamic was investigated by nonlinear regression analysis using the Adams–Bohart, Yoon–Nelson, Clark, and Yan mathematical models. Conclusively, our research highlights, firstly, that the obtained biosorbent material has the required properties for retaining the ethacridine lactate from aqueous solution in continuous system. Secondly, it emphasizes that the modeling approach reveals an acceptable fitting with the experimental data for the Yoon–Nelson, Clark, and Yan models.

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Section: Biosorption Column Modelingsupporting

confidence: 67%

“…The Yoon-Nelson model is suitable for systems with one molecule to adsorb. It pays no attention to the biosorbent properties and can establish the biosorption capacity and time when the outlet concentration is 50% of the initial one [53]. The Yoon-Nelson model is expressed by the following Equation:…”

Section: Biosorption Column Modelingmentioning

confidence: 99%

Biosorptive Removal of Ethacridine Lactate from Aqueous Solutions by Saccharomyces pastorianus Residual Biomass/Calcium Alginate Composite Beads: Fixed-Bed Column Study

et al. 2022

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“…The significant increase in adsorption capacity when the pH value was around 8−10 originated from the equilibrium of the adsorption reaction moving forward because the H + was neutralized by the alkaline reaction system. The optimal pH for the adsorption of boron was 10.03, and the boron species in this system was [B(OH) 4 − ] with a concentration of up to around 0.90, suggesting that the dominant boron species involved in the adsorption reaction was [B(OH) 4 − ]. However, when the pH of the solution was greater than 10, the decrease in the boron adsorption capacity at pH 11 was attributed to the repulsive interactions between the deprotonated hydroxyl groups of NMDG and the borate anions as well as to the competition between the borate and hydroxide anions for the adsorption sites.…”

Section: ■ Results and Discussionmentioning

confidence: 96%

“…62,63 These were found not to ionize and to exist mainly in the form of [B(OH) 3 ], with a pH value of ≤7. However, if the pH exceeded 9, then the predominant species of boron in the boric acid solution would be [B(OH) 4 − ]. Therefore, the initial pH value of the solution was very important for adsorption.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…1−3 Boron is an important rare nonmetallic element, yet excessive accumulation of boron in the environment can cause severe health hazards to plants and animals as well as serious environmental damage. 4 The utilization of boron resources in salt lake brine has been widely studied. Therefore, it is vital to enrich and reuse boron resources.…”

Section: ■ Introductionmentioning

confidence: 99%

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Selective Removal of Boron from Aqueous Solutions Using ECH@NGM Aerogels with Excellent Hydrophilic and Mechanical Properties: Performance and Response Surface Methodology Analysis

Pan

Gan

et al. 2022

Langmuir

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The remediation of environmental boron contamination has received extensive research attention. The adsorbent ECH@NGM aerogel with high hydrophilic and mechanical properties was synthesized to remove boron. The ECH@NGM aerogel had a high adsorption capacity of 81.11 mg/g, which was 14.50% higher than that of commercial boron-selective resin Amberlite IRA743. The Freundlich model and pseudo-second-order model described the adsorption behavior well. In addition, the response surface methodology (RSM) could predict the experimental outcomes and optimize the reaction conditions, and X-ray photoelectron spectroscopy (XPS) and control tests were utilized to investigate probable adsorption mechanisms. These data showed that the B ← N coordination bond was the primary adsorption force. The adsorbent had good resistance to interference from coexisting salts, high reusability, good adsorption performance even after five reuse cycles, and a high desorption rate in a relatively short time. The adsorption performance in real brines could be maintained at 80%. Therefore, this work not only provided ECH@NGM aerogels for the removal of boron from brine but also elucidated the main adsorption processes between N-containing adsorbents and boron, facilitating the design of future adsorbents for boron removal.

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Amino‐functionalized hyper‐cross‐linked resins for levulinic acid adsorption from sugarcane bagasse hydrolysate

Ji,

Shen,

Wang

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDLevulinic acid (LA) is an important biomass‐platform compound. The preparation of LA from biomass will inevitably produce many by‐products. However, there are few investigations focused on the separation and purification of LA from biomass hydrolysate. This study designed a series of hyper‐cross‐linked resins to adsorb LA from sugarcane bagasse hydrolysate, investigated the adsorption behavior of LA onto resin in a fixed‐bed system and established a relevant model to depict the adsorption process, which can provide reference for LA separation.RESULTSThe hyper‐cross‐linked resin G10PTEPA synthesized by poly(styrene‐divinylbenzene‐glycidyl methacrylate) resin G10 with the Friedel–Crafts reaction and amination reaction using tetraethylenepentamine (TEPA) had the best adsorption performance. The adsorption capacity of LA onto G10PTEPA in the sugarcane bagasse hydrolysate was 95.02 mg g−1, which was improved by 37% compared with G10. The maximum efficiency of the fixed‐bed onto G10PTEPA was 86.01% at flow rate of 0.6 mL min−1, with bed volume of 14 mL, fixed‐bed diameter of 2 cm, and feed LA concentration of 19.0 g · L−1. After elution by ethanol, a five‐fold increase in the concentration of LA with a purity of 80% was achieved. The Thomas model and the Yoon–Nelson model fitted well (R2 > 0.99) to the fixed‐bed adsorption behavior of LA onto G10PTEPA and can give accurate predictions.CONCLUSIONThe resin G10PTEPA was the best‐performing adsorbent for LA adsorption. Larger fixed‐bed diameter, higher flow rate and higher inflow concentration were beneficial to increase the mass transfer driving force. This study provides a potential adsorbent and theoretical guidance for LA separation. © 2023 Society of Chemical Industry.

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Removal of boron by a modified resin in fixed bed column: Breakthrough curve analysis using dynamic adsorption models and artificial neural network model

Cited by 41 publications

References 44 publications

Biosorptive Removal of Ethacridine Lactate from Aqueous Solutions by Saccharomyces pastorianus Residual Biomass/Calcium Alginate Composite Beads: Fixed-Bed Column Study

Biosorptive Removal of Ethacridine Lactate from Aqueous Solutions by Saccharomyces pastorianus Residual Biomass/Calcium Alginate Composite Beads: Fixed-Bed Column Study

Selective Removal of Boron from Aqueous Solutions Using ECH@NGM Aerogels with Excellent Hydrophilic and Mechanical Properties: Performance and Response Surface Methodology Analysis

Amino‐functionalized hyper‐cross‐linked resins for levulinic acid adsorption from sugarcane bagasse hydrolysate

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