Lin Shi, Di Zhang, Mingyi Yang, Fangfang Li, Jinfeng Zhao, Zhaohui He, Yangwei Bai
Waste management (New York, N.Y.) 2024 Mar 01Environmental DNA (eDNA) carrying antibiotic resistance gene (ARG) has attracted a great deal of attention because of its threat to the ecology and human health. Traditional porous adsorbents, such as microporous biochar and natural mineral, are low-effective in removing eDNA from sewage. This study used cuttlefish-bone (CB), a fishery waste, as an anticipated material to adsorb a model compound of eDNA from herring sperm (hsDNA). An interesting result was firstly observed that extremely high DNA adsorption on cuttlefish-bone pyrolysis derivative (CCB) was up to 88.7 mg/g, 3-10 folds higher than that of most other adsorbents in the existing literatures, which was attributed to the carbon film and large pores. To achieve an adsorption rate of 75 %, hsDNA adsorption took 96 h on CB but only 24 h on CCB, which was attributed to the fluent channel of CCB. The ligand exchange, Ca2+ bridge and π-π interaction were identified as dominated adsorption mechanisms, based on FTIR and phosphate competition experiments. This study exploited a high-efficient, environmentally friendly, and low-cost adsorbent for treating ARG-contaminated soil and water. Copyright © 2024. Published by Elsevier Ltd.
Lin Shi, Di Zhang, Mingyi Yang, Fangfang Li, Jinfeng Zhao, Zhaohui He, Yangwei Bai. New discovery of extremely high adsorption of environmental DNA on cuttlefish bone pyrolysis derivative via large pore structure and carbon film. Waste management (New York, N.Y.). 2024 Mar 01;175:286-293
PMID: 38237404
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