Multilayer immobilizing of denitrifying Bacillus sp. and TiO 2 -AgNPs on floating expanded clay carrier for co-treatment of nitrite and pathogens in aquaculture.

التفاصيل البيبلوغرافية
العنوان:	Multilayer immobilizing of denitrifying Bacillus sp. and TiO 2 -AgNPs on floating expanded clay carrier for co-treatment of nitrite and pathogens in aquaculture.
المؤلفون:	Hoang PH; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam thuhp@ims.vast.ac.vn.; Institute of Biotechnology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam., Nguyen MT; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam thuhp@ims.vast.ac.vn.; Institute of Biotechnology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam., Phan KS; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam thuhp@ims.vast.ac.vn.; Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam., Bui HG; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam thuhp@ims.vast.ac.vn.; Institute of Biotechnology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam., Le TTH; Vietnam National University of Agriculture Trau Quy, Gia Lam District Hanoi 100000 Vietnam., Chu NH; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam thuhp@ims.vast.ac.vn.; Institute of Biotechnology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam., Ho NA; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam thuhp@ims.vast.ac.vn.; Institute of Biotechnology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam., Pham QH; Institute of Biotechnology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam., Tran XK; Institute of Biotechnology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam., Ha PT; Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam thuhp@ims.vast.ac.vn.; Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District Hanoi 100000 Vietnam.
المصدر:	RSC advances [RSC Adv] 2024 Jan 09; Vol. 14 (3), pp. 1984-1994. Date of Electronic Publication: 2024 Jan 09 (Print Publication: 2024).
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 101581657 Publication Model: eCollection Cited Medium: Internet ISSN: 2046-2069 (Electronic) Linking ISSN: 20462069 NLM ISO Abbreviation: RSC Adv Subsets: PubMed not MEDLINE
أسماء مطبوعة:	Original Publication: Cambridge [England] : Royal Society of Chemistry, [2011]-
مستخلص:	Nitrite contamination and the spread of pathogens can seriously degrade water quality. To simultaneously control these factors, an innovative approach of fabricating a remediation agent that contained denitrifying bacteria and TiO 2 -AgNPs co-immobilized on floating expanded clay (EC) was proposed in this study. The EC was fabricated from a mixture of clay and rice husk through pyrolysis at a high temperature of 1200 °C, followed by a rapid cooling step to create a porous structure for the material. TiO 2 NPs were modified with Ag to shift the absorbance threshold of TiO 2 -AgNPs into the visible region of 700-800 nm. The experimental results showed that the stirring speed of 250 rpm was suitable for immobilizing TiO 2 -AgNPs on EC and achieved the highest Ti and Ag content of 639.38 ± 3.04 and 200.51 ± 3.71 ppm, respectively. Coating TiO 2 -Ag/EC with chitosan (0.5%) significantly reduced the detachment level of immobilized TiO 2 -AgNPs compared to that of the material with no coating. In particular, this functionalized material inhibited 99.93 ± 0.1% of Vibrio parahaemolyticus pathogen but did not adversely affect the denitrifying bacteria after 2 h of visible light irradiation. Based on the electrostatic bond between oppositely charged polymers, the denitrifying bacteria, Bacillus sp., in alginate solution was successfully immobilized on the chitosan-coated TiO 2 -Ag/EC with a bacteria density of (76.67 ± 9.43) × 10 ⁷ CFU g ^-1 , retaining its nitrite removal efficiency at 99.0 ± 0.27% through six treatment cycles. These findings provide solid evidence for further investigating the combination of biodegradation and photodegradation in wastewater treatment. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
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تواريخ الأحداث:	Date Created: 20240110 Latest Revision: 20240111
رمز التحديث:	20240111
مُعرف محوري في PubMed:	PMC10774862
DOI:	10.1039/d3ra07361k
PMID:	38196911
قاعدة البيانات:	MEDLINE

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تدمد:	2046-2069
DOI:	10.1039/d3ra07361k