Linking desorption kinetics to phenanthrene biodegradation in soil

In situ measurement of solution concentrations and fluxes of sulfonamides and trimethoprim antibiotics in soils using o-DGT

“…To minimise solvent effects, the antibiotic solutions were first added to 25% of the soil and allowed to vent totally (to avoid potential effect of MeOH) before mixing well with the remaining soil (i.e. 75% of the soil) following the procedure in previous study [30]. Blank soil that was not augmented with antibiotics, but treated with the same amount of pure MeOH, was also prepared following the same procedure.…”

Investigation into the feasibility of black carbon for remediation of nonylphenol polluted sediment through desorption kinetics after different order spiking

“…Desorption should also be considered when assessing the contaminant release riskor examining sorbent utility. Currently, desorption techniques are increasingly and widely applied to feasible studies of sorbents such as Tenax TA, XAD resin and hydroxypropyl-b-cyclodextrin (Xu et al, 2008;Rhodes et al, 2010;Sandhu and Gu, 2013). These porous polymers can act as a sink for HOCs that are desorbing from sorbents where the aqueous concentration remains at zero (Pignatello, 1990) and where the desorption distribution and binding limits can be realized (You et al, 2007).…”

Impact of Biochar on Organic Contaminants in Soil: A Tool for Mitigating Risk?

“…The different soil types were amended with AChar between 0.1% and 5% concentrations, where increase in concentrations of AChar resulted in a 7.8-fold decrease in rapidly desorbed fraction (%F rap ) and corresponding decrease in (slow desorbed fraction) %F slow . Similarly, as the soil-PAH contact time increased, the %F rap , which represents labile fractions of the compound [38] decreased due to strong pore sorption. The pore sites within such black carbons prove to be impervious to aqueous-based extraction solutions [129] and variations in soil physicochemical properties showed no effect on phenanthrene desorption in AChar-amended soils.…”

“…Although HOCs undergo sorption within the SOM matrix, they are subject to potential release from the reversible sorption sites to become bioavailable, or organisms migrate towards the compounds [37,38]. The total HOC content in soils does not always provide valid information on the potential biodegradable or ecotoxicologically relevant fractions and environmental risk [29,39].…”

“…The desorption of PAHs from soils has been intensely studied in recent years [27,38,65,128]. Zhou et al [128] studied the desorption of pyrene and phenanthrene from sawdust wood-derived charcoal produced at 400 °C for 4 and 8 h, respectively, to produce two pine-wood charcoal samples (PC2 and PC3).…”