颗粒活性炭（GAC）处理是水务公司可用于提高天然有机物去除率并符合最近颁布的消毒剂/消毒副产品规则的一种方法。GAC的成本取决于其使用寿命和再利用能力。本文报道的研究使用微柱来研究三氯化铁混凝如何影响GAC随后去除的总有机碳（TOC）。三氯化铁预处理通过降低进水TOC和使TOC保持更易吸附，延长了GAC床层寿命。Jar试验表明，在pH值小于6.0时，三氯化铁在等摩尔基础上去除TOC的效果优于铝盐。包括43个参考文献、表格和图表。

Granular activated carbon (GAC) treatment is one method that water utilities can use to increase removal of natural organic matter and comply with the recently promulgated Disinfectants/Disinfection Byproducts Rule. The cost of GAC depends on its useful service life and its capacity for reuse. The research reported here used minicolumns to investigate how ferric chloride coagulation influenced the total organic carbon (TOC) subsequently removed by GAC. Ferric chloride pretreatment lengthened GAC bed life by lowering influent TOC and by rendering the TOC that remained more adsorbable. Jar tests showed that at pH < 6.0, ferric chloride was superior to aluminum salts, on an equimolar basis, for removing TOC. Includes 43 references, table, figures.