厌氧颗粒污泥对水中17β-雌二醇的吸附

发布时间：2019-05-09 05:57

【摘要】：采用厌氧颗粒污泥(AnGS)对17β-雌二醇(E2)进行吸附试验,考察了E2初始浓度、AnGS的用量、温度、pH值和离子强度对吸附过程的影响,并通过扫描电镜(SEM)分析了吸附前后AnGS的表观变化。结果表明:前20 min为快速吸附过程,在30 min左右达到动态吸附平衡;吸附容量随着E2初始浓度的增加而增大,但随AnGS的增多而减少。低温、低pH值条件有利于AnGS对E2的吸附;离子强度在0~0.025 mol/L时有利于吸附,而在0.025~0.125 mol/L时不利于吸附。吸附E2后AnGS的外表面和内部的孔隙均变小,且外表面结构比内部更加紧密,表明对E2的吸附主要发生在AnGS的外表面。
[Abstract]:The adsorption of 17 尾-estradiol (E _ 2) by anaerobic granular sludge (AnGS) was studied. The effects of initial concentration of E _ 2, dosage of AnGS, temperature, pH value and ionic strength on the adsorption process were investigated. The apparent changes of AnGS before and after adsorption were analyzed by scanning electron microscope (SEM). The results show that the first 20 min is a rapid adsorption process, and the dynamic adsorption equilibrium is reached at about 30 min, and the adsorption capacity increases with the increase of the initial concentration of E2, but decreases with the increase of AnGS. At low temperature and low pH value, it is beneficial to the adsorption of E2 by AnGS, the ion strength is beneficial to adsorption when the ionic strength is 0 鈮，

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