Research on the wetting mechanism of coal dust by different surfactants: combination of experimental characterization and molecular dynamics simulation.

Surfactants can reduce the surface tension of water and improve the efficiency of spray dust reduction, but the synergistic mechanism of composite surfactant solutions wetting coal dust remains unclear. In this study, sodium dodecyl sulfonate (SDDS)/sodium dodecylbenzene sulfonate (SDBS) solution and SDDS/primary alcohol ethoxylate (AEO-9) solution were prepared to wet three types of coal with different deterioration degrees. The surface tension, contact angle, and functional group composition were measured.

Preparation and characterization of magnetic modified bone charcoal for removing Cu ions from industrial and mining wastewater.

Heavy metal water pollution is an urgent global problem to be addressed. Copper ions are common toxic heavy metal pollutants in wastewater. In order to remove the excessive copper ions in wastewater, in this study, chicken bone charcoal was modified by sodium dodecyl sulfonate and combined with magnetic nanoparticles prepared with ferric chloride hexahydrate and ferrous sulfate heptahydrate to produce a high efficiency adsorbent.

Synthesis and Performance of a Novel High-Efficiency Coal Dust Suppressant Based on Self-Healing Gel.

During transportation and storage, coal produces a lot of dust, which pollutes the environment and threatens the occupational health of workers. Although many dust suppressants have been developed for dust prevention at work, the implementation of current dust suppressants does not meet the requirements due to various factors such as the hydrophobic nature of coal dust and a harsh external environment. In this study, hydroxyethyl cellulose, acrylamide, and stearyl methyl acrylate were used for micelle polymerization to prepare an environmental protection dust suppressant for preventing dust during coal storage and transportation.

Hydrogenation of Functionalized Nitroarenes Catalyzed by Single-Phase Pyrite FeS Nanoparticles on N,S-Codoped Porous Carbon.

Catalytic hydrogenation of nitroarenes is an industrially very important and environmentally friendly process for the production of anilines; however, highly chemoselective reduction of nitroarenes decorated with one or more reducible groups in a nitroarene molecule remains a challenge. Herein, a novel hybrid non-noble iron-based nanocatalyst (named as FeS /NSC) was developed, which was prepared from biomass as C and N source together with inexpensive Fe(NO ) as Fe source through high-temperature pyrolysis in a straightforward and cost-effective procedure. Comprehensive characterization revealed that single-phase pyrite FeS nanoparticles with precisely defined composition and uniform size were homogeneously dispersed on N,S-codoped porous carbon with large specific surface area, hierarchical porous channels, and high pore volume.

One-pot selective N-formylation of nitroarenes to formamides catalyzed by core-shell structured cobalt nanoparticles.

One-pot direct N-formylation of readily available nitroarenes with ammonium formate catalyzed by core-shell structured cobalt nanoparticles has been developed. A broad set of nitroarenes was successfully converted to their corresponding formamides in good to high yields with various functional group tolerance. This heterogeneous catalyst can be easily removed from the reaction medium and can be reused several times without a significant loss of reaction efficiency.