Xiangnan Zhang, Junhan Dai, Jie Ding, Zheng Li, Yuye Zhang, Hongbo Li, Na Li
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引用次数: 0
Abstract
The persistent presence of antibiotics in aquatic ecosystems poses severe risks to environmental and human health. Herein, we report a novel dopamine-modified Fe3O4@C@DA nanocomposite synthesized via covalent amidation for efficient antibiotic removal. The material’s core–shell structure integrates Fe3O4 nanoparticles with a carbon matrix, functionalized by dopamine to enhance hydrophilicity and stability. Comprehensive characterization confirmed successful dopamine grafting, yielding a superparamagnetic adsorbent (41.0 emu/g). The adsorbent demonstrated exceptional performance for ciprofloxacin (CIP) and tetracycline (TC), achieving maximum capacities of 42.5 mg/g (CIP) and 28.4 mg/g (TC). Kinetic studies revealed rapid equilibration within 8 h (CIP) and 6 h (TC), well-described by pseudo-second-order kinetics (R2 > 0.999), while Langmuir isotherms (R2 > 0.98) indicated monolayer chemisorption dominated by hydrogen bonding, π-π interactions, and electrostatic attraction. Remarkably, the material retained > 60% adsorption efficiency after five regeneration cycles. This work advances antibiotic remediation by synergizing covalent functionalization, multi-mechanistic adsorption, and scalable design, offering a sustainable solution for water purification.
期刊介绍：
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
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Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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