Abstract
AbstractThe removal of benzene, toluene and p‐xylene (BTX) compounds from aqueous solutions with highly crosslinked cationic starch containing tertiary amine groups was investigated. The adsorption process has found to be initial pH‐ and initial concentration‐dependent, endothermic, and follows the Langmuir isothermal adsorption.The heats of adsorption (ΔH) at initial pH = 4 of benzene, toluene and p‐xylene compounds are 29.45 kJ mol−1, 34.41 kJ mol−1, and 35.58 kJ mol−1, respectively, those at initial pH = 10 are 30.17 kJ mol−1, 35.56 kJ mol−1, and 39.39 kJ mol−1, respectively. The order of the amount of adsorbed BTX compounds on the adsorbent is benzene > toluene > p‐xylene.
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