【摘要】 为了快速、高效地提取活性污泥的胞外聚合物（extracellular polymeric substances,EPS）,采用4种方法提取紧密结合型EPS（tightly bound EPS,TB-EPS）,对比不同提取方法的优缺点,考察TB-EPS对Mn²⁺吸附性能的影响,研究了TB-EPS的吸附机理.结果表明:加热法提取的TB-EPS效率高,方法简单,操作方便,不破坏细胞结构.加热法提取的TB-EPS用于吸附重金属Mn²⁺,其最大吸附率为53.8%,吸附过程符合二级反应动力学特征和Langmuir吸附等温方程,该吸附以化学吸附为主.在TB-EPS中色氨酸和酪氨酸的疏水作用是主要的吸附机理.更多还原

【Abstract】 In order to quickly and efficiently extract extracellular polymeric substances（ EPS） from activated sludge,four methods were used to extract tightly bound EPS（ TB-EPS）. The advantages and disadvantages of different extraction methods were compared,the effect of TB-EPS on the adsorption performance of Mn²⁺ was investigated,and the adsorption mechanism of TB-EPS was studied. The results showthat the heating method is simple and efficient with no damage to cell structure. When adsorbing heavy metal Mn²⁺,the maximum adsorption rate of TB-EPS extracted by heating method is 53. 8%. The adsorption process conforms to the second-order reaction kinetic characteristics and the Langmuir adsorption isotherm equation, which is mainly the chemical adsorption. The main adsorption mechanism of TB-EPS is the interaction of hydrophobic tryptophan and tyrosin.更多还原