Trace metals, such as nickel (Ni), are often found associated with ferrihydrite (Fh) in soil and sediment have been shown to redistribute during Fe(II)-catalyzed transformation of Fh. Fh, however, is inhibited when natural organic matter (NOM) To explore whether NOM affects the behavior Ni we tracked distribution, Fe atom exchange, mineral Fh coprecipitated Suwannee River (SRNOM-Fh). As expecte...

The paper presents the results of use black currant (Ribes nigrum L.) variety Sofya with lignified cuttings solutions nanoparticles biogenic ferrihydrite in two modifications. Colloidal “pure” (Feh) and doped aluminum (Feh_Al) have been tested. research showed that soaking exogenous treatment these can increase rooting rate currant. maximum rhizogenic activity was noted variant - 61.9%, which s...

A previous study involving lead(II) [Pb(II)] sorption onto ferrihydrite over a wide range of conditions highlighted the advantages of combining molecular- and macroscopic-scale investigations with surface complexation modeling to predict Pb(II) speciation and partitioning in aqueous systems. In this work, an extensive collection of new macroscopic and spectroscopic data was used to assess the a...

Few studies have combined molecular- and macroscopic-scale investigations with surface complexation model (SCM) development to predict trace metal speciation and partitioning in aqueous systems over a broad range of conditions. In this work, an extensive collection of new macroscopic and spectroscopic data was used to assess the ability of the modified triple-layer model (TLM) to predict single...

Density functional theory (DFT) calculations were performed on a model of a ferrihydrite nanoparticle interacting with chromate ([Formula: see text]) in water. Two configurations each of monodentate and bidentate adsorbed chromate as well as an outer-sphere and a dissolved bichromate ([Formula: see text]) were simulated. In addition to the 3-D periodic planewave DFT models, molecular clusters w...