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Green synthesis of diatom-allophane bio-nanocomposites for highly efficient oxytetracycline adsorption

文献类型：期刊论文

作者Li, Mengyuan5,6,7; Wang, Shun4; Liu, Dong3,7; Losic, Dusan5; Zhao, Ning6,7; Tian, Qian2; Shen, Yuguo6,7; Yu, Rongda6,7; Liu, Hao6,7; Ma, Qiyi6,7
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2024-11-15
卷号951页码:13
关键词Oxytetracycline adsorption Allophane Diatom Nano-clay mineral Green synthesis Surface complexation
ISSN号0048-9697
DOI10.1016/j.scitotenv.2024.175641
英文摘要The extensive use of the antibiotic oxytetracycline (OTC) has led to considerable environmental contamination and other negative impacts, prompting an urgent need for a green, effective, and innovative OTC adsorption material. In this study, diatom-allophane bio-nanocomposites were synthesized using a simple and eco-friendly method, yielding a homogeneous coating of allophane nanoparticles on diatom surfaces. The resultant bio-nanocomposites were found to have hierarchically porous structures and abundant active sites derived from successful allophane loading and dispersion on diatom surfaces. The OTC adsorption capacity of this novel adsorbent is remarkable (219.112 mgg(-1)), surpassing the capacities of raw allophane and diatoms by >5 and 10 times, respectively. Mechanistically, OTC adsorption by the bio-nanocomposites was found to be driven primarily by chemisorption through a process involving complexation between the amide and amino groups on OTC and the aluminum hydroxyl and carboxyl groups on the adsorbent surface. Electrostatic interactions and hydrogen bonding also contribute significantly to OTC capture. Furthermore, the diatom-allophane bio-nanocomposites exhibit excellent performance over a wide pH range (4-7), in the presence of various cations (Na+, K+, Ca2+, Mg2+) and anions (Cl-, NO3-, SO42-), and in real water bodies. These findings demonstrate the potential of the diatom-allophane bio-nanocomposite as a green, efficient, and promising biological-mineral adsorbent for environmental remediation, leveraging the combined utilization of biological and mineral resources.
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001302529600001
源URL[http://ir.gig.ac.cn/handle/344008/80641]  
专题中国科学院矿物学与成矿学重点实验室
通讯作者Liu, Dong
作者单位1.Guangdong Univ Technol, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China
2.Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Inst Subtrop Agr, Changsha 410125, Peoples R China
3.Xiamen Univ, State Key Lab Marine Environm Sci MEL, Xiamen 361012, Peoples R China
4.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sal, Qinghai Prov Key Lab Geol & Environm Salt Lakes, Xining 810008, Peoples R China
5.Univ Adelaide, Sch Chem Engn & Adv Mat, Adelaide, SA 5005, Australia
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Li, Mengyuan,Wang, Shun,Liu, Dong,et al. Green synthesis of diatom-allophane bio-nanocomposites for highly efficient oxytetracycline adsorption[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,951:13.
APA Li, Mengyuan.,Wang, Shun.,Liu, Dong.,Losic, Dusan.,Zhao, Ning.,...&Yuan, Peng.(2024).Green synthesis of diatom-allophane bio-nanocomposites for highly efficient oxytetracycline adsorption.SCIENCE OF THE TOTAL ENVIRONMENT,951,13.
MLA Li, Mengyuan,et al."Green synthesis of diatom-allophane bio-nanocomposites for highly efficient oxytetracycline adsorption".SCIENCE OF THE TOTAL ENVIRONMENT 951(2024):13.

入库方式： OAI收割

来源：广州地球化学研究所

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