本研究的目的是评估阿特拉津与三种分子量增加的染料之间的竞争吸附机制，并消除使用天然有机物时遇到的困难。采用酚醛树脂基活性炭过滤器（ACF）作为斜纹织物进行吸附实验。这些被命名为ACF-10、ACF-20和ACF-25，以增加活性和孔径不均匀性。ACF被切成小块，在105℃下干燥，并储存在干燥器中，以尽量减少水分接触和可能的氧化。本研究选择的目标微污染物是杀虫剂阿特拉津。为了便于快速准确地分析低浓度阿特拉津，使用了C标记的阿特拉津。 通过将2.5 mL等份0.22 um过滤样品与18 mL闪烁鸡尾酒混合，并使用闪烁计数器分析所得荧光来制备样品。C-阿特拉津批次的比活性在56.3 uCi/mg到38.7 uCi/mg之间。基于此，95%置信度的检测限在0.05-0.10 ug/L之间变化。三种分子尺寸不断增大的染料被用作竞争吸附质:亚甲基蓝（MB）、孔雀石绿（MG）和刚果红（CR）。分别在661nm、617nm和497nm波长下，通过可见分光光度法对MB、MG和CR的染料浓度进行量化。检测限约为0.1μm。吸附研究包括以下7天等温线试验:阿特拉津和去离子溶液中每种染料的单一溶质吸附- 蒸馏水（DDW），阿特拉津与每种染料同时吸附，染料预载后阿特拉津吸附，阿特拉津预载后染料接触。

The objective of this research was to assess the competitive adsorption mechanism between atrazine and three dyes of increasing molecular size, and to eliminate the difficulties encountered when using natural organic matter. Phenolic resin-based activated carbon filters (ACFs) received as twilled weave fabrics were used in adsorption experiments. These were designated ACF-10, ACF-20 and ACF-25 in order of increasing activation and pore size heterogeneity. The ACFs were cut into small pieces, dried at 105C, and stored in a dessicator to minimize moisture contact and possible oxidation. The target micropollutant chosen for this study was the pesticide, atrazine. To facilitate rapid and accurate analysis of low atrazine concentrations, C-labelled atrazine was used. Samples were prepared by mixing 2.5 mL aliquots of 0.22 um filtered sample with 18 mL of scintillation cocktail and analyzing the resultant fluorescence with a scintillation counter. The specific activity of C-atrazine batches varied from 56.3 uCi/mg to 38.7 uCi/mg. Based on this, the limit of detection for 95 percent confidence varied between 0.05-0.10 ug/L. Three dyes of increasing molecular size were used as competing adsorbates: Methylene Blue (MB), Malachite Green (MG) and Congo Red (CR). Dye concentrations were quantified by visible spectrophotometry at wavelengths 661nm, 617nm and 497nm for MB, MG and CR, respectively. The limit of detection was approximately 0.1 uM. The adsorption study consisted of the following 7 day isotherm tests: single solute adsorption of atrazine and each of the dyes in deionized-distilled water (DDW), simultaneous adsorption of atrazine with each dye, dye preloading followed by atrazine adsorption, and atrazine preloading followed by dye contact.