活性炭吸附法脱除废水中的苯酚及吸附剂再生的研究

Study on Activated Carbon Adsorption to Remove Phenol from Wastewater and Regeneration of the Adsorbent

对活性炭对废水中苯酚的吸附平衡以及活性炭的再生进行了试验性研究和理论性探讨。结果发现，温度对活性炭的吸附能力有显著的影响，低温对吸附有利，吸附平衡可用Ｌａｒｇｍｕｉｒ 方程描述；ＰＨ 值对活性炭对苯酚的吸附也有较强的影响，酸性的水溶液对吸附有利，强碱性水溶液对再生有利。分别采用乙醇、丙酮、ＮａＯＨ 溶液、ＮａＯＨ 溶液＋ 乙醇的混合液对吸附剂活性炭进行再生，再生率均能达到８５ ％ 以上，基本满足工业要求。

Adsorption equilibra of phenol on activated carbon and the adsorbent regeneration were experimentally studied and theorically inquired. The reults revealed that temperature had remarkable effect on the phenol adsorption capability of the activated carbon; Low temperature and acid condition were favourable to the adsorption. The adsorption isotherms could be expressed by the Langmuir isotherms. It was also shown that regeneration of the activated carbon saturated with phenol could be achieved by using ethanol, acetone, NaOH solution, or the mixture of NaOH solution and ethanol, with beyong 85% regenerated efficiency.