背景莱茵河中的有机物显著影响三氯乙烯（TCE）和1,2,4-三氯苯（TCB）在颗粒活性炭（GAC）柱中的行为。GAC柱对TCE的吸附能力比间歇吸附实验的吸附能力低50%以上。预加载有机物的GAC的TCE容量与添加TCE的GAC柱非常相似，这表明预加载等温线方法可用于预测GAC柱的容量。由于吸附容量的长期降低，直接标度法无法很好地预测TCE在全尺寸色谱柱中的突破。运行40天后，发现TCB完全去除，可能是通过生物降解。包括14个参考文献、表格和图表。

Background organic matter in the Rhine River significantly affected the behavior of trichloroethene (TCE) and 1,2,4-trichlorobenzene (TCB) in granular activated carbon (GAC) columns. The GAC column adsorption capacity for TCE was found to be more than 50 percent less than that found in batch adsorption experiments. The capacity for TCE of GAC preloaded with organic matter was found to be very similar to that of a TCE-spiked GAC column, suggesting that the preloading isotherm approach can be useful in predicting GAC column capacity. Because of long-term reductions in adsorption capacity, the breakthrough of TCE in a fullscale column is not well predicted by the direct scaleup approach. Complete removal of TCB, presumably by biodegradation, was found after 40 days of operation. Includes 14 references, tables, figures.