| Abstract |
| This research was performed to clarify the mechanisms of nitrogen and phosphorus removal by wood powder. In this work, Pinus rigida which is abundant in Korea and has no economic value was used in preparation of the wood powder as a sorbent material. The experiments were carried out in 2 phases, isothermal adsorption test, column test. The results of adsorption test fitted well the Langmuir and Feundlich isothermal equations. Mixed powder which contained 50% bark powder and 50% woody powder exhibited higher adsorption bond energy and adsorption capacity than woody powder alone. Effects of sulfate and organic matters on phosphate uptake by mixed powder were studied by running equilibrium column tests at background sulfate and COD concentrations, 300mg/L and 150mg/L, respectively. The effects of sulfate and COD were not evident, while the removal of TN and PO4-P was over 99% and 98%, respectively. It was found that the mixed powder was effective in the selective removal of nitrogen and phosphate. |
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| Key Words |
| Wood powder, nitrogen, phosphorus, isothermal adsorption test, column test |
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