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J Colloid Interface Sci. 2008 Dec 15;328(2):243-7. doi: 10.1016/j.jcis.2008.08.066. Epub 2008 Oct 9.

Adsorption of methylene blue and orange II onto unmodified and surfactant-modified zeolite.

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School of Chemistry and Materials Science, FuJian Normal University, Fuzhou 350007, China.


Adsorption of cationic methylene blue and anionic orange II onto unmodified and surfactant-modified zeolites was studied using a batch equilibration method. The effects of equilibrium time, solution pH, and sorption temperature were examined. The results suggested that 2% sodium dodecyl benzenesulfonate (SDBS)- and 3% sodium dodecyl sulfate (SDS)-modified zeolites had higher adsorption capacities for methylene blue than the unmodified zeolite, while 2% cetylpyridinium bromide hexadecyl (CPB)- and 2% hexadecylammonium bromide (HDTMA)-modified zeolites were the best adsorbents for orange II. The adsorption conditions were optimized, and the mechanisms of adsorption are briefly discussed.


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