ABSTRACT
Adsorption characteristics of flumequine on kaolinitic clay have been discussed. Effect of polymers (CMC, PVA, and polysaccharides) which are generally used as formulation adjuvants or as soil conditioners on the adsorption of flumequine has been examined in the present study. It has been observed that flumequine adsorbs strongly, and its desorption is difficult. pH played an important role in determining adsorption. In the presence of polymers, the adsorption exhibits three patterns: decrease, no change, and initial decrease followed by increase in the quantity adsorbed. Most of the ionic polymers have resulted in the decrease of adsorption due to the competition or flocculation effect. Nonionic polymers except PVA and scleroglucan showed little effect. In most of the cases the change in adsorption is small compared to the total quantity of flumequine adsorbed. This further shows that flumequine adsorbs with strong interaction which remain unaffected in the presence of polymers known for their strong affinity toward clay.
