활성탄 종류별 Nonylphenol과 Bisphenol-A의 흡착특성

내분비계장애물질인 Nonylphenol & Bisphenol-A를 활성탄 원료 및 사용기간에 따라 제거 특성을 평가하였다. 활성탄의 종류는 석탄계 칼곤 F400, 목탄계 PICA, 야자계활성탄을 사용하였다. 평형흡착실험에서 Nonylphenol, Bisphenol-A 모두 F400이 가장 높은 흡착능을 나타냈으며, 다음으로 Nonylphenol은 PICA에서, Bisphenol-A는 야자계 활성탄이 높은 흡착능을 나타냈다. 연속흡착실험에서의 흡착능을 각각 비교하면 Nonylphenol은 F400-virgin ＞ PICA-virgin ＞ CO-virgin, PICA-3.1yr ＞ F400-2.2yr ＞ F400-5.9yr ＞ CO-3.1yr Bisphenol-A는 CO-virgin ＞ F400-2.2yr ＞ CO-3.1yr ＞ PICA-virgin ＞ F400-5.9yr ＞ PICA-3.1yr의 순으로 나타났다.

Adsorption characteristics of two endocrine disruptors, nonylphenol and bisphenol-A, were evaluated depending on the type and service duration of activated carbon(AC). Bituminous coal-, wood-, and coconut-based coals were tested. Bituminous coal-based AC(F400) had the greatest sorption capacity for the two chemicals tested, followed by wood-based AC(PICA) for nonylphenol and coconut palm-based AC(CAC) for bisphenol-A. Phosphoric acid is used during manufacturing of wood-based AC, leading to accumulation of P₂O? on AC surface. It was found that P2O5 helped in improving the removal of nonylphenol and bisphenol-A. During the column test, removal efficiencies of hydrophobic compounds such as nonylphenol and bisphenol-A decreased over time since the main removal mechanism was adsorption. The order of the bisphenol-A removal was: CO-virgin ＞ F400-2.2yr ＞ CO-3.1yr ＞ PICA-virgin ＞ F400-5.9yr ＞ PICA-3.1yr. The order of the nonylphenol removal was: F400-virgin ＞ PICA-virgin ＞ CO-virgin, PICA-3.1yr ＞ F400-2.2yr ＞ F400-5.9yr ＞ CO-3.1yr. Bituminous coal AC performed the best over time. Endocrine disruptors such as these two compounds appear to be removed effectively by activated carbon through and adsorption.