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Natural zeolite from Weolseong-Gun, Kyeongsangbuk-Do was pulverized, selected for mesh sizes 80 to 30(ZWⅠ), 30 to 16(ZWⅡ) and smaller than 30(ZWⅢ), washed and dried prior to its experiment. Three categories of synthetic wastewaters containing each different organic amines-monoethanolamine(MEA) diethanolamine(DEA) and triethanolamine(TEA)-were also prepared as samples. The mixtures of each zeolite and sample wastewater were stirred inside 500㎖-beakers; the TOC concentrations of initial samples and latter supernatents were measured and thus the adsorption efficiencies of each zeolite was determined. 1. The adsorption was most effective against MEA, its 1/n valued 0.59 to 0.71 and k 1 to 2.6; moderately effective against DEA, its 1/n valued 0.6 to 0.97 and k 0.53 to 1.6; and poor against TEA, its 1/n valued 2.2 to 3.9 and k neary zero. 2. When ZWⅡ was added at the ratio of 10g/250㎖ to each three samples of initial TOC concentration 50㎎/ℓ and k pH 7.93% of TOC was removed in 10 minutes and 98% of TOC in 20 minutes from both MEA and DEA samples; 68% of TOC in 10 minutes and 76% of TOC in 20 minutes from TEA sample; and the adsorption equilibrium was reached in 30 minutes in all three sample mixtures. 3. The optimum pH values 5.0 to 7.2 equally in all three samples. 4. The magnitudes of interference among ion solutes were in the order of Ca^(++) , Mg^(++) and Na^(+) for all three sample mixtures.
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