Evaluation and characterization of starch nanoparticles for adsorption of urea from dialysates

Pan, Xin; Liu, Pei; Wang, Yiwei; Zhang, Ye-jun; Liu, Jianjing; Zhang, Huang-Qin; Qian, Dawei; Shang, Erxin; Cao, Yu; Duan, Jin‐Ao

doi:10.1016/j.ijbiomac.2022.09.093

Cited by 11 publications

(2 citation statements)

References 33 publications

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“…The assessment of uptake was performed at treatment temperatures of 20, 25, 30, and 35 °C, utilizing an initial urea concentration of 150 mg/L, throughout a time frame of adsorption saturation 36 . The effect of pH on the adsorption performance was investigated at 25 °C, 150 mg/L and saturated adsorption, and the pH was adjusted by using diluted solutions of 0.1 M HCl or 0.1 M NaOH 37 . All experiments were conducted in three sets of parallel experiments under identical conditions.…”

Section: Methodsmentioning

confidence: 99%

Ultrahigh and kinetic-favorable adsorption for recycling urea using corncob-derived porous biochar

Wang,

Chen,

Wang

et al. 2024

Sci Rep

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Insufficient attention has been given to the recycling of excess urea despite its potential detrimental effects on soil nutrient equilibrium, geological structure, and crop health. In this study, corncob-derived porous biochar (CPB), which is rich in surface functional groups, was prepared from biomass corncob in two steps as an adsorbent to remove urea from wastewater. Compared with the typical carbonization and activation processes, this process resulted in a higher yield of CPB and an ultrahigh adsorption capacity for urea. Response surface analysis was utilized to determine the optimal carbonization conditions, which were found to be 500 °C for 6 h with a heating rate of 15 °C/min. The exceptional adsorption capability of CPB can be ascribed to its porous structure and significant presence of oxygen-containing functional groups, which facilitate a synergistic interaction of physisorption and chemisorption. This adsorption phenomenon aligns with the Harkins–Jura isotherm model and adheres to pseudo-second order kinetics. CPB demonstrates potential as an adsorbent for the elimination of urea from wastewater in an economical and effective fashion.

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Section: Methodsmentioning

confidence: 99%

Ultrahigh and kinetic-favorable adsorption for recycling urea using corncob-derived porous biochar

Wang,

Chen,

Wang

et al. 2024

Sci Rep

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show abstract

“…At the adsorption temperature of 25, 30, 35, and 40 °C and the initial concentration of urea of 150 mg/L for 6 h, the solution was removed and filtered to calculate the adsorption capacity. The pH was modified using either a dilute solution of 0.1 M hydrochloric acid (HCl) or 0.1 M sodium hydroxide (NaOH) . Three parallel experiments were conducted under the same conditions to ensure the accuracy and reliability of the results.…”

Section: Methodsmentioning

confidence: 99%

One-Step Hydrothermal Preparation of a Corncob-Derived Porous Adsorbent with High Adsorption Capacity for Urea in Wastewater: Sorption Experiments and Kinetics Study

et al. 2023

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With rapid industrial development, the massive generation of nitrogenous wastewater poses a serious threat to both human beings and the ecosystem. Bio-based adsorbents are considered promising adsorption materials for many applications. However, their complex preparation procedures, large energy consumption, and difficulty of microstructure control hinder their practical applications. In this study, a new corncob-derived porous adsorbent (CPA) with excellent urea adsorption capacity in wastewater was prepared by the one-step hydrothermal process. The effects of the hydrothermal process conditions on the urea adsorption capacity of the CPA were evaluated and optimized using the response surface methodology, and a kinetic analysis of the CPA was also carried out. Our findings showed that the adsorption process of urea by the adsorbent followed the Langmuir isotherm and pseudo-second-order kinetic models. The high adsorption capacity for urea was attributed to the abundant porous structure and the hydrogen bonds formed between the adsorbent and the amine group in urea, which made it more conducive to the adsorption of urea. Therefore, we believe that CPA could be a promising adsorbent for urea removal in wastewater.

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A review: current urea sorbents for the development of a wearable artificial kidney

Huang,

Zhang,

Yang

et al. 2024

J Mater Sci

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Evaluation and characterization of starch nanoparticles for adsorption of urea from dialysates

Cited by 11 publications

References 33 publications

Ultrahigh and kinetic-favorable adsorption for recycling urea using corncob-derived porous biochar

Ultrahigh and kinetic-favorable adsorption for recycling urea using corncob-derived porous biochar

One-Step Hydrothermal Preparation of a Corncob-Derived Porous Adsorbent with High Adsorption Capacity for Urea in Wastewater: Sorption Experiments and Kinetics Study

A review: current urea sorbents for the development of a wearable artificial kidney

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