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To better understand the mechanisms regarding effects of the interactions between organic contaminants (ORCs) and carbonaceous materials (CMs) on bioavailability of ORCs, 22 mg/kg of phenanthrene and nitrobenzene were spiked onto various CMs, and their microbial mineralization by the bacterium Mycobacterium vanbaalenii PYR-1 was investigated. The results showed that as sorption of phenanthrene and...
Developing methods to measure interactions of carbon nanotubes (CNTs) with soils and sediments and understanding the impact of soil and sediment properties on CNT deposition are essential for assessing CNT environmental risks. In this study, we utilized functionalized carbon-14 labeled nanotubes to systematically investigate retention of multiwall CNTs (MWCNTs) by 3 humic acids, 3 natural biopolymers,...
Impact of humic acid (HA) coating on biochar properties and the associated influence on naphthalene (Naph) sorption were studied. Coating with HA evidently decreased the sorption capacity and isotherm nonlinearity of Naph by the biochars, resulting from their chemical composition and surface property changes. At low solute concentrations, the suppression of HA coating on Naph sorption was primarily...
Sorption of hydrophobic organic compounds (HOCs) (phenanthrene, lindane and atrazine) by original and OH-functionalized multiwalled carbon nanotubes (F-MWCNTs) was examined. Functionalization of MWCNTs with hydrophilic moieties greatly reduced their ability to sorb HOCs. The surface area (SA) and sum of meso- and macropore volumes of MWCNTs were governing characteristics that influenced their affinity...
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