Magnetically steerable iron oxides-manganese dioxide core–shell micromotors for organic and microplastic removals

Because of micro/nanoscale manipulation and task-performing capability, micro/nanomotors (MNMs) have attracted lots of research interests for potential applications in biomedical and environmental applications. Owing to the low-cost, good motion behavior, and environmental friendliness, various low-cost metal oxides based MNMs become promising alternatives to the precious metal based MNMs, in particular for environmental remediation applications. Hereby, we demonstrate the facile and scalable fabrication of two types of bubble-propelled iron oxides-MnO2 core–shell micromotors (Fe3O4-MnO2 and Fe2O3-MnO2) for pollutant removal. The Fe2O3-MnO2 micromotor exhibits efficient removals of both aqueous organics and suspended microplastics via the synergy of catalytic degradation, surface adsorption, and adsorptive bubbles separations mechanisms. The adsorptive bubbles separation achieved more than 10% removal of the suspended microplastics from the polluted water in 2 h. We clarified the major contributions of different remediation mechanisms in pollutants removals, and the findings may be beneficial to a wide range of environmental applications of MNMs.

Latest Posts

Plastic Waste Management (Amendment) Rules, 2022

Guidelines on Extended Producer Responsibility for Plastic Packaging. These guidelines provides framework for implementation of Extended Producer Responsibility. The Guidelines provide the roles and responsibilities of Producers, Importers, Brand Owners, Central Pollution Control Board, State Pollution Control Board or Pollution Control Committees, recyclers and waste processors for effective implementation of Extended Producer Responsibility. Please note[…]

POLICY BRIEF (Input Paper): Prevention of Marine Litter in India

The Policy Brief gives an overview of the current waste management related policy ecosystem and provides preliminary recommendations based on desk research, specifically on marine litter in India.  

Draft Plastic Waste Management Rules, 2022

The Government of India announced the Plastic Waste Management Amendment Rules, 2021, which will prohibit the manufacture, import, stocking, distribution, sale and use of single use plastics (including polystyrene and expanded polystyrene) by 2022. To stop litering and promote reuse, the thickness of plastic carry bags have been increased. Please note that “English text follows[…]

Draft resolution- End plastic pollution: Towards an international legally binding instrument

Environment ministers around the globe agreed to create an Intergovernmental Negotiating Committee to create an international agreement to end plastic pollution at the fifth United Nations Environment Assembly (UNEA), held in Nairobi, Kenya, between February 28 and March 2, 2022.    

Baseline assessment of microplastic concentrations in marine and freshwater environments of a developing Southeast Asian country, Viet Nam

Developing country facilities, financial and human resources prevent complete application of sampling, analysis, and observation protocols used in developed countries neccitating adaptations. Researchers in Vietnam developed and standardized a methodology for microplastic monitoring in sediments and surface waters of 21 environments (rivers, lakes, bays, beaches) of eight cities or provinces. The concentrations of microplastics in[…]