评估了颗粒活性炭（GAC）使用时间对定期接触污染物的GAC吸附器剩余寿命的影响。测定了预加载背景有机物（BOM）长达25个月的活性炭吸附阿特拉津的平衡和动力学参数。此外，在使用GAC的中试试验中测量了阿特拉津的去除情况，GAC已经预加载了5个月和20个月。等温线数据表明:预加载的BOM显著降低了GAC对阿特拉津的剩余吸附量；竞争吸附对测试的预氧化GAC样品不重要；而且，使用粉碎的预加载GAC会导致高估剩余吸附容量。 预压对GAC承载力的影响最大；吸附动力学没有受到严重影响。均匀表面扩散模型用于预测中试中阿特拉津的去除，并预测GAC的剩余寿命。对于给定的吸附剂和背景水，针对美国中西部和西欧公用事业的典型情况，给出了阿特拉津去除的剩余寿命预测。包括43个参考文献、表格和图表。

The effect of granular activated carbon (GAC) service time on the remaining life of GAC adsorbers that are exposed to periodic pollutant episodes was evaluated. Equilibrium and kinetic parameters describing the adsorption of atrazine were determined for GAC that had been preloaded with backgound organic matter (BOM) for as long as 25 months. Furthermore, atrazine removal was measured in pilot tests employing GAC that had been preloaded for five and 20 months. Isotherm data showed that: preloaded BOM sharply reduced the remaining adsorption capacity of GAC for atrazine; competitive adsorption was not important on the tested prelaoded GAC samples; and, use of pulverized preloaded GAC led to an overestimate of remaining adsorption capacity. Preloading had the greatest effect on GAC capacity; adsorption kinetics were not affected as severely. The homogeneous surface diffusion model was used to predict atrazine removal in pilot tests and to predict remaining GAC life. For the given adsorbent and background water, remaining life predictions for atrazine removal are presented for scenarios that may be typical for utilities in the midwestern United States and in western Europe. Includes 43 references, tables, figures.