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Cation exchange reactions in soils have been paid considerable attention in soil science, and previous experimental and modelling studies indicate a good understanding of the processes.
The cation exchange capacity of colloids whose negative charge depends largely on surface hydroxyl (OH_) groups--oxide clays and humus--is said to be pH dependent.
The treatment column effluents from the GAC post-adsorber and the cation exchange resin were each passed through their respective copper pipe test loops on a continuous basis for 40 days.
This trend is similar with Okagbue [29], and it described that the decrease in maximum dry density is attributed by the agglomeration and flocculation of clay particles through cation exchange reaction, leading to occupy larger space as well as reducing the weight: volume ratio.
Cation exchange sites in SOM arise from the dissociation of weakly acidic functional groups, particularly carboxylic and phenolic groups (Thomas and Hargrove 1984).
Cation exchange capacity (CEC) of the clay mineral was measured using Ba[Cl.sub.2] method [26].
* Corresponding Author E-mail: arkofuls@yahoo.co.uk Table 1: Cation Exchange Capacities of Various Clays from Eastern Region-Ghana.
Strontium chlorides were then isolated from the resulting solution by filtering through columns of 2mL AG50W X8 200-400 mesh Biorad cation exchange resin.
Cation exchange capacity (CEC) was obtained by summation of exchangeable cations and exchange acidity.
Sodium MMT with a cation exchange capacity (CEC) of 75 mmol/100 g (Nanofil 757, Sud-Chemie AG, Germany) was used for organic modification.
Cation exchange reactions are the most common type of exchange reaction in soil.