It is sometimes difficult or impossible to discriminate experimentally between adsorption and absorption : in such cases it is convenient to use the noncommittal term sorption. In ion exchange, sorption is the uptake of electrolytes or nonelectrolytes by ion exchangers through mechanisms other than pure ion exchange.
With respect to surface phenomena, this term is also used when the retention mechanism at a
surface is unknown. Adsorption, surface precipitation, and polymerization are all examples of sorption.

The term "sorption" was found in the following pages:

Chromium Isotope Ratio as a Tool to Track the Redox State of the Earth | EVISA's News
Speciation matters even if the interest is in total element concentration | EVISA's News
Directory of scientists: Britta Planer-Friedrich
17th Annual Goldschmidt Conference | EVISA's Agenda of Events
Determination of tungsten species in natural waters by HPLC-ICP-MS | EVISA's News
Natural dissolved organic matter plays dual role in cycling of mercury | EVISA's News
Journals database: Journal of Contaminant Hydrology
DUST 2016: 2nd International Conference on Atmospheric Dust | EVISA's Agenda of Events
Speciation Analysis - Striving for Quality | EVISA's News
ICOBTE 2017: International Conference on the Biogeochemistry of Trace Elements | EVISA's Agenda of Events
Hydrogeochemical modeling with PhreeqC | EVISA's Agenda of Events
Gadolinium-based MRI contrast agents found intact in the outlet of a waste water treatment plant | EVISA's News
Link database: Geochemical Modeling - Chemical Speciation
Journals database: Adsorption science and technology
The use of arsenic in "poultry industry" | EVISA's News
Link database: Visual MINTEQ
Frontiers in Environmental Geoscience 2011 | EVISA's Agenda of Events
Link database: Rossendorf Expert System for Surface and Sorption Thermodynamics
Development of a Liquid Chromatographic Method for Quantifying 11 Organotin Compounds in Workplace Air Samples using HPLC-ICP-MS | EVISA's News
Directory of scientists: Zdenka Šlejkovec