Study on the preparation and feasibility of a novel adding-type biological slow-release carbon source

Cui, Ying; Bo, Zhao; Xie, Fei; Zhang, Xiao; Zhou, Aijuan; Wang, Sufang; Yue, Xiuping

doi:10.1016/j.jenvman.2022.115236

Cited by 15 publications

(8 citation statements)

References 60 publications

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“…Therefore, it was fitted to the Ritger–Peppas equation ( Mt = 0.39 k 0.77 , R 2 = 0.9691). According to the Ritger–Peppas equation, when n value was less than 0.45, the release mechanism was Fickian diffusion; when the n value was between 0.45 and 0.89, the release mechanism was non-Fickian diffusion, indicating diffusion and skeleton dissolution acted together; and when the n value was more than 0.89, the release mechanism was skeleton dissolution [ 40 ]. In our study, the n value was 0.77 at pH 7.4, which indicated that diffusion and skeleton dissolution acted simultaneously.…”

Section: Resultsmentioning

confidence: 99%

Preparation, Physicochemical Characterization, and Antioxidant Activity of Naringin–Silk Fibroin–Alginate Microspheres and Application in Yogurt

Wang

Zhang

et al. 2022

Foods

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Naringin is the major polyphenol in bitter orange peel with antioxidant property. However, its pH sensitivity, low solubility, and bitter taste limit its application in food. In this study, naringin–sodium alginate–silk fibroin microspheres were prepared by the ionic gel method. The loading capacity and encapsulation efficiency of naringin in microspheres were 13.2% and 77.6%, respectively. The morphology of microspheres was characterized by scanning electron microscopy. The X-ray diffractometry and differential scanning calorimetry results showed naringin was amorphous after encapsulation. Fourier-transform infrared spectroscopy and molecular docking analysis confirmed the intermolecular hydrogen bonds between naringin and sodium alginate. Naringin could release from the microspheres continuously under different pH conditions. Compared with free naringin, the 2,2-diphenyl-1-picrylhydrazyl scavenging activity and the stability of naringin microspheres were significantly improved. The application of naringin microspheres in yogurt indicated the precipitation of whey could be effectively reduced and the decline rate of pH was inhibited. The study suggested that naringin encapsulated microspheres were beneficial for improving the shelf life of this bioactive product as well as providing a new idea for functional yogurt.

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Section: Resultsmentioning

confidence: 99%

Preparation, Physicochemical Characterization, and Antioxidant Activity of Naringin–Silk Fibroin–Alginate Microspheres and Application in Yogurt

Wang

Zhang

et al. 2022

Foods

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“…Thus, surface pores are formed [20]. Many gases such as CO2 and CxHy are generated, which change the carbon skeleton structure and form pores with different sizes and structures [21]. As shown in Figure 1(c), with the phosphoric acid concentration increasing to 1.5mol/L, the surface microspheres are larger and most microspheres are 2-3μm in diameter.…”

Section: Sem Analysismentioning

confidence: 98%

Adsorption properties and mechanism of Pb<sup>2+</sup> in hydrothermal carbon solution of modified banana peel

Bai,

Yao,

Zhao

et al. 2023

Preprint

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Using banana peel as raw material, the adsorption properties of hydrothermal carbon pre-10 pared from banana peel modified with different concentrations of phosphoric acid solution for lead 11 ions in aqueous solution were studied. The surface structure and functional groups of the modified 12 hydrothermal carbon were analyzed by XRD and SEM. The results show that the surface of the 13 modified banana peel hydrothermal carbon prepared at 240℃ and 2mol/L phosphoric acid solution 14 has large pores. The adsorption capacity is larger when pH value is 6.When the concentration of 15 phosphoric acid solution was 2mol/L, the solid-liquid ratio was 2g/L, the adsorption capacity was 16 40.64mg/g, and the removal rate was 82.74%.When the initial concentration of lead solution in-17 creased to 100mg/L, the adsorption capacity of modified hydrothermal carbon for lead ion increased 18 to 76.81mg/g, and the removal rate decreased to 76.81%.The equilibrium adsorption time of banana 19 peel phosphoric acid modified hydrothermal carbon for lead ions in solution is 300min. The adsorp-20 tion process satisfies the pseudo-second-order kinetic model and Langmuir isotherm equation. The 21 reaction temperature is 313K, and the equilibrium adsorption capacity can reach 101.19mg/g. The 22 adsorption of Pb ions in aqueous solution by phosphoric acid modified hydrothermal carbon is 23 dominated by single layer chemisorption. The artificial neural network has a fitting correlation of 24 0.99, and the adsorption process includes physical adsorption, electrostatic attraction, ion exchange, 25 and surface complexation.

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“…When n < 0.45, the chloride ion release mechanism is Fick diffusion, when 0.45 < n < 0.89, the chloride ion release mechanism is non-Fick diffusion and when n > 0.89, the chloride ion release mechanism is skeleton erosion [40]. The detailed meaning is mentioned later.…”

Section: Release Of Chloride Ionsmentioning

confidence: 98%

The Aging Behavior of Polyvinyl Chloride Microplastics by UV/Sodium Percarbonate Oxidation: Efficiency and Mechanism

Su,

Liu,

et al. 2024

Water

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The aging behavior of microplastics (MPs) in the environment has garnered significant attention, yet the exact aging process undergone by microplastics during advanced oxidation still remains unclear. This study emphasized elucidating the oxidation and dechlorination mechanisms of polyvinyl chloride microplastics (PVC MPs) within the UV-activated sodium percarbonate system (UV/SPC). After 35 h of UV/SPC (0.05 M) treatment, it exhibited effective dechlorination with a Cl− release of 100.62 ± 13.17 mg/L. And this treatment resulted in the fragmentation and release of fragments from the PVC MPs, thereby contributing to their further aging and dechlorination. In addition, an increase in oxygen-containing functional groups was identified. Quenching experiments confirm that ·OH and ·CO3− are the primary active species present in the system. In summary, the aging of PVC MPs results in a process of fragmentation, releasing fragments that are more fragile and susceptible to mineralization compared to the original PVC MPs. The release of chloride ions originates from the mineralization of these fragments released from PVC MPs by ·OH and ·CO3−. This study has provided valuable insights into the aging mechanisms of MPs in practical wastewater treatment.

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Study on the preparation and feasibility of a novel adding-type biological slow-release carbon source

Cited by 15 publications

References 60 publications

Preparation, Physicochemical Characterization, and Antioxidant Activity of Naringin–Silk Fibroin–Alginate Microspheres and Application in Yogurt

Preparation, Physicochemical Characterization, and Antioxidant Activity of Naringin–Silk Fibroin–Alginate Microspheres and Application in Yogurt

Adsorption properties and mechanism of Pb<sup>2+</sup> in hydrothermal carbon solution of modified banana peel

The Aging Behavior of Polyvinyl Chloride Microplastics by UV/Sodium Percarbonate Oxidation: Efficiency and Mechanism

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