Abstract
Adsorption of cadmium (Cd) onto fine sand was investigated using batch (static) and steady flow (dynamic) experiments at pHs of 5.5, 6.0 and 6.5. For both types of experiment, adsorption of Cd onto sand was found to increase with pH. In all experiments, greater adsorption of Cd was found in flow experiments than in batch experiments. Flow interruption was used to test whether nonequilibrium sorption occurred during transport of Cd. No concentration drop was observed immediately after the resumption of flow. Instead, for all experiments, a consistent increase in effluent concentration was observed indicating that Cd was desorbed during the interruption period. This indicates the significance of velocity on adsorption/desorption of Cd onto the sand. The amount of desorption was predicted by a transition from the dynamic to the static sorption isotherm.
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.
