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Multifunctional sodium alginate/chitosan-modified graphene oxide reinforced membrane for simultaneous removal of nanoplastics, emulsified oil, and dyes in water
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Researchers developed a bioinspired three-layer membrane using sodium alginate, graphene oxide, and chitosan that removed over 99% of nanoplastics, emulsified oil, and dyes from water simultaneously, with excellent stability in extreme pH conditions and good recyclability.
Membrane technology is widely recognized as an efficient and advanced approach for wastewater treatment. However, the development of environmentally friendly and versatile membranes capable of effectively removing multiple contaminants remains a significant challenge. Inspired by natural magnets, we developed a heterostructured membrane using biomass materials to achieve the efficient removal of multiple contaminants from wastewater. Specifically, a bionic three-layer SA/GO/CS composite membrane was prepared by using sodium alginate (SA) and chitosan (CS) to modify graphene oxide (GO), respectively, and then assembled to both sides of the glass fiber (GF) membrane. The composite membranes achieved 99.87 % and 97.10 % removal of NPs with particle sizes of 500 nm and 50 nm. Moreover, the membrane demonstrated superior separation performance for mixed wastewater, enabling effective treatment of a broad spectrum of contaminants. Additionally, the membrane exhibited excellent stability when exposed to strong acid and alkali environments and demonstrated good recyclability throughout the multiple contaminants removal process. The bionic membrane, prepared using a straightforward method proposed in this study, provides an effective approach for enhanced removal of multiple contaminants in water. These findings contribute to the advancement of eco-friendly and versatile wastewater treatment membranes, opening new possibilities for sustainable water purification technologies.
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Synthesis of recyclable and light-weight graphene oxide/chitosan/genipin sponges for the adsorption of diclofenac, triclosan, and microplastics
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Researchers created a lightweight, recyclable sponge made from graphene oxide, chitosan, and genipin that can effectively remove microplastics and pharmaceutical contaminants from water. The sponge maintained its effectiveness through multiple reuse cycles, making it a practical and affordable water treatment option. This type of technology could help reduce human exposure to microplastics and other harmful substances in drinking water.
Removal of nanoplastics from aquatic environments using graphene oxide/chitosan sponges
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Researchers developed a three-dimensional porous graphene oxide/chitosan sponge with an average pore size of 21.67 µm and evaluated its effectiveness in removing polystyrene nanoplastics (31.1 nm diameter) from aqueous solutions.
Dual-target, high-capacity removal of microplastics and dyes from water using a recyclable sponge monolith.
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Researchers fabricated a crosslinker-free chitin/activated carbon sponge using cryo-assembly that simultaneously removes microplastics and multiple industrial dyes from water at record-high adsorption capacities, remains effective under challenging conditions like high salinity and humic acid interference, and can be upcycled into graphene via flash Joule heating for a closed-loop decontamination workflow.
Constructing green superhydrophilic and superoleophobic COFs-MOFs hybrid-based membrane for efficiently emulsion separation and synchronous removal of microplastics, dyes, and pesticides
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Researchers built a new type of environmentally friendly membrane that can simultaneously filter out microplastics, dyes, and pesticides from oily wastewater with over 99% efficiency. The membrane uses a combination of two advanced porous materials (MOFs and COFs) with a surface coating that repels oil but lets water through. This technology could improve water treatment and reduce the amount of microplastics and other pollutants that reach drinking water sources.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.