TEPA modified magnetic cellulose nanocrystals for efficient and highly selective removal of Cr(VI) from electroplating wastewater by high-density amine-based sites.

Efficient and highly selective elimination of Cr(VI) from electroplating effluent with complex nature is still very meaningful and challenging. Here, based on the mechanism of selective adsorption, an amino-functionalized cellulose-based magnetic adsorbent (FeO@CNC@TEPA) was designed with efficient and cost-effective. The adsorbent base material cellulose nanocrystals (CNC) was combined with a magnetic core (FeO) by co-precipitation, and then the selective functional monomer tetraethylenepentamine (TEPA) was grafted onto the CNC surface in large quantities under the action of the cross-linking agent epichlorohydrin (ECH).

Protein corona between nanoparticles and bacterial proteins in activated sludge: Characterization and effect on nanoparticle aggregation.

In this work, the protein coronas of activated sludge proteins on TiO nanoparticles (TNPs) and ZnO nanoparticles (ZNPs) were characterized. The proteins with high affinity to TNPs and ZNPs were identified by shotgun proteomics, and their effects of on the distributions of TNPs and ZNPs in activated sludge were concluded. In addition, the effects of protein coronas on the aggregations of TNPs and ZNPs were evaluated.

Fenton degradation of Cartap hydrochloride: identification of the main intermediates and the degradation pathway.

The advanced oxidation of Cartap hydrochloride (Cartap) promoted by the Fenton system in an aqueous medium was investigated. Based on total organic carbon, chemical oxygen demand and high-performance liquid chromatography, the oxidation of Cartap is quite efficient by the Fenton system. Its long chain is easily destroyed, but the reaction does not proceed to complete mineralization.

Molecular dynamics simulation of TCDD adsorption on organo-montmorillonite.

In this work, molecular dynamics simulation was applied to investigate the adsorption of Tetrachlorodibenzo-p-Dioxin (TCDD) on tetramethylammonium (TMA) and tetrapropylammonium (TPA) modified montmorillonite, with the aim of providing novel information for understanding the adsorptive characteristics of organo-montmorillonite toward organic contaminants. The simulation results showed that on both outer surface and interlayer space of TPA modified montmorillonite (TPA-mont), TCDD was adsorbed between the TPA cations with the molecular edge facing siloxane surface. Similar result was observed for the adsorption on the outer surface of TMA modified montmorillonite (TMA-mont).