Abstract
This chapter provides a review of the literature on binding of organic contaminants by aqueous humic substances (AHSs). Colloidal dispersions of AHSs are shown to be potential carriers (flushing agents) for enhanced removal of hydrophobic organic contaminants from aquifers. The process involves binding of contaminants by AHSs which can enhance the apparent solubility and mobility of contaminants. Binding, often modelled as linear partitioning, may vary with aqueous concentrations of contaminants and/or AHSs, and other parameters. Evidence is mixed whether aggregation of AHSs at high concentrations increases or decreases their capacity to carry organic contaminants. Sorption of contaminants and AHSs to solid aquifer particles and co-aggregation of AHSs with inorganic colloids/clays are also important, potentially clogging pores and reducing aquifer permeability. Advanced numerical models (e.g., BIONAPL/3D), which include binding/sorption kinetics and in situ biodegradation, can now be used to simulate carrier-assisted transport of contaminants in aquifers.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
