Nanoremediation of tilapia fish culture using iron oxide nanoparticles biosynthesized by Bacillus subtilis and immobilized in a free-floating macroporous cryogel.

IF 2.3 2区 农林科学 Q1 VETERINARY SCIENCES BMC Veterinary Research Pub Date : 2024-10-09 DOI:10.1186/s12917-024-04292-5
Basma Sheta, Mohammed El-Zahed, Mona Nawareg, Zeinab Elkhiary, Salahuddin Sadek, Ayman Hyder
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Abstract

Background and aim: Contamination from increased anthropogenic activities poses a threat to human health as well as the ecosystem. To develop a nanotechnological approach to improve aqua fisheries, we synthesized magnetic hematite nanoparticle-based gel and evaluated its efficacy in a cadmium-polluted closed system to decontaminate water and improve tilapia fish health.

Methods: Green iron oxide nanoparticles were biosynthesized by the metabolite of bacillus subtilis and incorporated into polyvinyl alcohol to construct a hydrogel by cryogelation.

Key findings: The cryogel had interconnected macropores with diameters widely ranging between 20 and 200 μm and could be free-floating in water. When applied in cadmium-polluted tilapia culture, this nanogel reduced turbidity and ammonia in the aquarium, adsorbed cadmium from the water with a larger quantity on the gel's outer surface than in its center., and reduced cadmium concentration in tilapia's liver, gills, and muscles. Application of this nano-based cryogel reduced the toxic effects of cadmium on tilapia fish. It maintained hepatic and renal cell nuclear integrity as determined by comet assay. This nano-treatment also reversed the cadmium-induced elevations of plasma lipids, glucose, stress marker cortisol, the hepatic enzymes AST and ALT, and the kidney function marker urea, and improved the lymphocytopenia and other hematological functions in tilapia fish intoxicated by cadmium.

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使用由枯草芽孢杆菌生物合成并固定在自由浮动大孔冷冻凝胶中的氧化铁纳米颗粒对罗非鱼养殖进行纳米补救。
背景和目的:人类活动增加所造成的污染对人类健康和生态系统构成威胁。为了开发一种改善水产渔业的纳米技术方法,我们合成了基于磁性赤铁矿纳米颗粒的凝胶,并评估了其在镉污染封闭系统中净化水质和改善罗非鱼健康的功效:方法:利用枯草芽孢杆菌的代谢产物生物合成绿色氧化铁纳米粒子,并将其与聚乙烯醇结合,通过冷凝胶法构建水凝胶:该冷凝胶具有相互连接的大孔隙,直径在 20 至 200 μm 之间,可在水中自由浮动。将这种纳米凝胶应用于受镉污染的罗非鱼养殖中,可降低水族箱中的浑浊度和氨氮,凝胶外表面对水中镉的吸附量大于凝胶中心,并可降低罗非鱼肝脏、鳃和肌肉中的镉浓度。使用这种纳米低温凝胶可减少镉对罗非鱼的毒性影响。根据彗星试验的测定,它能保持肝细胞和肾细胞核的完整性。这种纳米处理还能逆转镉引起的血脂、血糖、应激标志物皮质醇、肝酶 AST 和 ALT 以及肾功能标志物尿素的升高,并改善镉中毒罗非鱼的淋巴细胞减少和其他血液学功能。
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来源期刊
BMC Veterinary Research
BMC Veterinary Research VETERINARY SCIENCES-
CiteScore
4.80
自引率
3.80%
发文量
420
审稿时长
3-6 weeks
期刊介绍: BMC Veterinary Research is an open access, peer-reviewed journal that considers articles on all aspects of veterinary science and medicine, including the epidemiology, diagnosis, prevention and treatment of medical conditions of domestic, companion, farm and wild animals, as well as the biomedical processes that underlie their health.
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