Tailoring polymeric composite gel beads-encapsulated microorganism for efficient degradation of phenolic compounds

Liu, Xueping; Xue, Ping; Feng, Jia; Qiu, Dongya; Shi, Keren; Zhang, Weiwei

doi:10.1016/j.cjche.2020.08.002

Cited by 11 publications

(3 citation statements)

References 23 publications

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“…KHBP gel can be synthesized by covalent cross-linking at room temperature without initiator by the thiol-double bond reaction between keratin and HBP, and is prepared to address the issues of bacterial infection and oxidative stress noted in the wound environment. 56 This material has good physical and chemical properties, antibacterial effect, antioxidant capacity, biocompatibility, and wound-healing effects; thus, it is an efficient wound repair material that integrates multiple functions. The preparation approach used is simple to execute, uses mild conditions, easily available sources, and involves low costs; thus, it can help reduce the financial burden of wound repair and has high application potential.…”

Section: Discussionmentioning

confidence: 99%

“…HBP with double bond at the end was synthesized by Michael addition reaction. KHBP gel can be synthesized by covalent cross-linking at room temperature without initiator by the thiol-double bond reaction between keratin and HBP, and is prepared to address the issues of bacterial infection and oxidative stress noted in the wound environment . This material has good physical and chemical properties, antibacterial effect, antioxidant capacity, biocompatibility, and wound-healing effects; thus, it is an efficient wound repair material that integrates multiple functions.…”

Section: Discussionmentioning

confidence: 99%

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Wound-Healing Material with Antibacterial and Antioxidant Functions, Constructed Using Keratin, Hyperbranched Polymers, and MnO₂

Liu

Kang

et al. 2023

ACS Appl. Mater. Interfaces

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Wound healing, a global medical issue, poses a substantial financial burden. Therefore, developing low-cost and highly efficacious wound-healing materials is essential. In this study, we prepared keratin–hyperbranched polymer hydrogel-M (KHBP-M), a multifunctional composite gel, by mixing reduced keratin containing free sulfhydryl groups extracted from human hair waste, hyperbranched polymer (HBP) with double bonds at the end, and MnO2 nanoparticles prepared using the biological template method. Keratin has intrinsic wound-healing properties, and MnO2 is a wound-healing material with both photothermal antibacterial and reactive oxygen species (ROS)–scavenging abilities. KHBP-M showed antibacterial effects against both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. When exposed to irradiation (808 nm), the killing ratio for S. aureus reached 99.99%, which is especially suitable for wound environments. A similar trend was noted for E. coli. The composite hydrogel also showed excellent ROS-scavenging ability and could resist oxidative stress in L929 cells. Furthermore, in an animal model of infected wounds, the KHBP-M hydrogel treated with near-infrared light had the fastest wound-healing rate, reaching 82.98% on day 15. Our study provides a promising wound-healing material, with simple preparation methods, easy access to sources, and low cost involved.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Wound-Healing Material with Antibacterial and Antioxidant Functions, Constructed Using Keratin, Hyperbranched Polymers, and MnO₂

Liu

Kang

et al. 2023

ACS Appl. Mater. Interfaces

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“…The study showed that the immobilization of BC significantly enhanced the removal of Pb 2+ by PSB, and the addition of PSB also enhanced the release of phosphorus from the surface of BC to regulate environmental pH and improve the adsorption of Pb 2+ . Liu et al [ 91 ] immobilized mixed microbial MO (mainly composed of Pseudomonas and Delftia ) in chitosan and polyvinyl alcohol beads (MO/PVA-CS), which achieved a phenol degradation efficiency of 99.5% in 120 h, while the degradation rate of phenol by free MO under the same treatment conditions was only 21.1%, indicating that the activity of MO can be improved by immobilization. Wu et al [ 42 ] prepared a novel bio-nanomaterial using magnetic Fe 3 O 4 and SA-PVA-immobilized S. cerevisiae to remove atrazine.…”

Section: Overview Of Immobilization Technologymentioning

confidence: 99%

Immobilization of Biomass Materials for Removal of Refractory Organic Pollutants from Wastewater

Liu

Yang

Zhang

et al. 2022

IJERPH

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In the field of environmental science and engineering, microorganisms, enzymes and algae are promising biomass materials that can effectively degrade pollutants. However, problems such as poor environmental adaptability, recycling difficulties, and secondary pollution exist in the practical application of non-immobilized biomass materials. Biomass immobilization is a novel environmental remediation technology that can effectively solve these problems. Compared with non-immobilized biomass, immobilized biomass materials have the advantages of reusability and stability in terms of pH, temperature, handling, and storage. Many researchers have studied immobilization technology (i.e., methods, carriers, and biomass types) and its applications for removing refractory organic pollutants. Based on this, this paper reviews biomass immobilization technology, outlines the mechanisms and factors affecting the removal of refractory organic pollutants, and introduces the application of immobilized biomass materials as fillers for reactors in water purification. This review provides some practical references for the preparation and application of immobilized biomass materials and promotes further research and development to expand the application range of this material for water purification.

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Use of biokaolinite clay for the microbial removal of phenol from real industrial wastewater samples by Dermacoccus nishinomiyaensis and Kocuria rosea

Hassouna,

Abdel‐Tawab,

Abdel‐Aleem

2024

Environmental Quality Mgmt

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Phenol bioremediation was investigated using two bacteria (primarily cocci) Dermacoccus nishinomiyaensis, Kocuria rosea strains and the one actinomycetes Nocardiopsis lucentensis which were isolated from samples of activated sludge from the wastewater treatment plant (WWTP) in Beni‐Suef, Egypt as sole carbon and energy sources. This was applied on real industrial wastewater sample taken from Ul HAWA textile plant, Middle Egypt. Degradation of phenol by microbes adsorbed on natural kaolin clay was studied compared with free microbes. In case of 50 mg/L as starting phenol concentration, the percentage removal using free microbes was 68%, corresponding to 98% in case of microbes adsorbed on kaolin clay after the passage of 48 h under incubation at 30°C and neutral pH at 150 rpm. Also, 300 mg/L of phenol achieved degradation frequency of 80% compared to 38% after ≈48 h without clay addition. High concentrations of an organic pollutant are usually inhibitory for the microorganisms. Kaolin clay has a pronounced effect in accelerating phenol degradation through biofilm formation resulting in decreasing the degradation time, increasing the percentage of removing efficiency under high phenol concentration conditions due to its buffering effects on pH fluctuations of the degradation system. Kaolin clay protects microorganisms against unfavorable environment, resists the adverse effects of substrate inhibition and accelerates the degradation process. The adsorption process was demonstrated by the pseudo‐first‐order, pseudo‐second‐order, Weber–Morris adsorption kinetic models, and four isotherm models namely, Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich have been applied to express the adsorption process. The SEM images of microbes adsorbed on kaolin clay explain their adsorption mode on the clay surface as biofilm (Bio kaolinite).

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Tailoring polymeric composite gel beads-encapsulated microorganism for efficient degradation of phenolic compounds

Cited by 11 publications

References 23 publications

Wound-Healing Material with Antibacterial and Antioxidant Functions, Constructed Using Keratin, Hyperbranched Polymers, and MnO₂

Wound-Healing Material with Antibacterial and Antioxidant Functions, Constructed Using Keratin, Hyperbranched Polymers, and MnO₂

Immobilization of Biomass Materials for Removal of Refractory Organic Pollutants from Wastewater

Use of biokaolinite clay for the microbial removal of phenol from real industrial wastewater samples by Dermacoccus nishinomiyaensis and Kocuria rosea

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Tailoring polymeric composite gel beads-encapsulated microorganism for efficient degradation of phenolic compounds

Cited by 11 publications

References 23 publications

Wound-Healing Material with Antibacterial and Antioxidant Functions, Constructed Using Keratin, Hyperbranched Polymers, and MnO2

Wound-Healing Material with Antibacterial and Antioxidant Functions, Constructed Using Keratin, Hyperbranched Polymers, and MnO2

Immobilization of Biomass Materials for Removal of Refractory Organic Pollutants from Wastewater

Use of biokaolinite clay for the microbial removal of phenol from real industrial wastewater samples by Dermacoccus nishinomiyaensis and Kocuria rosea

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Product

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About

Wound-Healing Material with Antibacterial and Antioxidant Functions, Constructed Using Keratin, Hyperbranched Polymers, and MnO₂

Wound-Healing Material with Antibacterial and Antioxidant Functions, Constructed Using Keratin, Hyperbranched Polymers, and MnO₂