建立了一个动力学模型来描述有机物的竞争吸附 用粉末活性炭（PAC）在PAC/膜中追踪有机化合物 过滤系统。由天然有机物（NOM）引起的两种主要竞争机制 考虑了场地竞争和孔隙堵塞。模型准确地预测了 1,4-二氯苯（p-DCB）和聚（苯乙烯）存在下阿特拉津的去除 磺酸盐（PSS），它代表了强竞争和孔隙阻塞的NOM 分别是分数。应用该模型研究了该模型的重要作用 设计和运行参数，如膜清洗间隔的长度， 膜清洗方式（反洗或液压冲洗）、PAC类型、剂量和 去除微量有机化合物的加药方案。阿特拉津去除率较高 发现受膜清洗间隔（MCI）的影响大于液压系统的影响 保留时间（HRT）。研究还发现，长时间的MCI并不一定有益 当使用低剂量PAC时，用于吸附微量有机化合物。这个 去除微量有机物的最佳膜反洗间隔应为 根据进水的NOM特性、PAC剂量和 反洗或液压冲洗水质。吸附剂的类型也非常复杂 重要的应根据进水的NOM特性进行选择。包括10个参考文献、表格和图表。

A dynamic model was developed to describe the competitive adsorption of trace organic compounds by powdered activated carbon (PAC) in a PAC/membrane filtration system. Two major competitive mechanisms caused by natural organic matter (NOM), direct competition for sites and pore blockage were considered. The model accurately predicted atrazine removal in the presence of 1,4-dichlorobenzene (p-DCB) and poly(styrene sulfonate) (PSS), which represented the strongly competing and the pore blocking NOM fractions, respectively. The model was applied to investigate the effects of important design and operating parameters such as the length of membrane cleaning interval, manner of membrane cleaning (backwash or hydraulic flushing), PAC type, dose, and dosing scenarios on the removal of trace organic compounds. Atrazine removal was found to be affected by the membrane cleaning interval (MCI) more than by the hydraulic retention time (HRT). It was also found that a long MCI was not necessarily beneficial for the adsorption of trace organic compounds when low PAC doses were used. The optimal membrane backwash interval for trace organic compound removal should be determined based on the NOM characteristics of the influent water, the PAC dose and the backwash or hydraulic flushing water quality. The type of adsorbent was also very important. It should be selected based on the NOM characteristics of the influent water. Includes 10 references, tables, figures.