Mechanism of removing chlorophenolic compounds from solution by a water-insoluble cationic starch

摘要: The removal of three chlorophenolic compounds from solutions using highly crosslinked cationic starch containing a tertiary amine group was investigated. were 2-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorophenol. adsorption process predominated over the initial pH = 2∼6 for 2 to 4 range ion-exchange at 12 10 Both processes coexist pH=8 6∼8 Experimental results indicate that is initially pH-independent, pH-dependent. are concentration-dependent correspond Langmuir isothermal adsorption. They endothermic 2-chlorophenol 2,4-chlorophenol, exothermic 2,4,6-chlorophenol. capacity larger than capacity. Moreover, order amount removed by 2,4,6-chlorophenol > 2-chlorophenol.