Enhanced stabilisation of simulant organic nuclear wastes in metakaolin-based geopolymers using graphene oxide
Source abstract
Abstract
Considering the hazardous nature of organic nuclear wastes to both humans and the environment, it is essential to dispose of them in an environmentally friendly manner. This research evaluated the solidification/stabilisation method for effectively disposing of organic nuclear wastes in metakaolin-based geopolymers by simulating highly contaminated organic waste in the laboratory. The oil was pre-emulsified with an alkali activator using graphene oxide (GO) as the emulsion stabiliser to stabilise oil droplets in the geopolymer matrix. Its performance was compared with samples using the cationic surfactant hexadecyltrimethylammonium bromide (CTAB). Experiments evaluated the emulsion stability and solidification of organic waste in the geopolymer composite. The results showed that GO-stabilised emulsions were highly stable, maintaining a constant creaming index due to GO`s strong barrier around the oil droplets. Adding GO, CTAB, and oil does not interfere with geopolymerisation. GO reduces the flowability of the fresh paste by 41 % due to its high water demand and increased viscosity. However, it significantly enhances the compressive strength of the geopolymer by 65.5 % after 28 days, acting as a nanofiller that improves the material`s load transfer and cohesion. Total organic carbon (TOC) leaching tests show minimal oil leaching, under 0.12 % of total oil content, stabilising within three days, giving high-performance organic waste-solidified samples.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Innovative concrete reinforcement materials · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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