颗粒活性炭吸附去除水中雌激素的试验研究

以自来水为试验原水,投加雌酮(E1)、雌二醇(E2)和乙炔雌二醇(EE2),考察了颗粒活性炭去除水中雌激素的效果及动力学.结果表明,活性炭吸附能快速有效地去除水中雌激素.接触10 min后,即达到吸附平衡.平衡质量浓度与雌激素起始质量浓度有关.初始质量浓度为500 ng/L时,E1、E2和EE2的去除率分别为74.7%、89.5%和82.8%.E1、E2和EE2同时存在时,活性炭对E2的吸附效果显著变差(初始质量浓度为500 ng/L时,吸附平衡质量浓度由44.65 ng/L增加到195.03 ng/L),而对E1和EE2的吸附效果没有影响.不同初始质量浓度的等温吸附数据可用Freundlich等温吸附方程来描述.

Removal of Estrogen From Water by Granular Activated Carbon Adsorption

Taking tap water as the raw water,the adsorption efficiency and kinetics of activated granular carbon in estrogen removal were studied by adding estrone(E1),17β-estradiol(E2) and 17α-ethynylestradiol(EE2). Results indicated that estrogens in tap water could be removed by activated adsorption quickly and efficiently. Adsorption equilibration was reached after contact for 10 min. The adsorption equilibration was related to the estrogen initial concentration. At initial concentration of 500 ng/L,the removal efficiencies of E1,E2 and EE2 were 74. 7%,89. 5% and 82. 8%,respectively. In presence of E1,E2 and EE2 simultaneously,the adsorption of E2 by activated carbon was deteriorated significantly(at initial concentration of 500 ng/L,the adsorption equilibration concentration increased from 44. 65 to 195. 03 ng/L),however,the adsorption of E1 and EE2 was not affected. The adsorption isotherm data obtained from different initial concentrations could be well explained by the Freundlich isotherm equations.