高氯酸盐污染地下水，可能被1500万美国人使用。大部分受污染的地下水位于该国干旱地区，如内华达州和南加州。2000年夏天，在加利福尼亚州雷德兰兹的德克萨斯街水处理厂进行了全面研究。使用活性碳（GAC）和其他三氯甲烷从该设施的地下水中去除。这项研究考察了韦斯特GAC和用铁和草酸定制的韦斯特GAC的使用情况。 还检查了使用硼氢化钠、氢氧化钠和硫代硫酸盐（与钙或钠结合）对GAC进行化学再生的情况。发现使用氢氧化钠进行两步化学再生，然后进行酸处理，以修复GAC，使其在第二个循环中吸收的高氯酸盐几乎与在第一个循环中吸收的高氯酸盐一样多。包括数字。

Perchlorate contaminates groundwater that could potentially be used by 15 million Americans. Much of this contaminated groundwater lies beneath arid regions of the country such as Nevada and southern California. In the summer of 2000, full-scale research was conducted at the Texas Street water treatment plant in Redlands, California. This facility employs granular activated carbon (GAC) to remove perchlorate (along with trichloroethylene and other organics) from the groundwater. The study examined the use of Westates GAC and Westates GAC that had been tailored with iron and oxalic acid. Also examined was the chemical regeneration of GAC using sodium borohydride, sodium hydroxide, and thiosulfate (combined with either calcium or sodium). A two step chemical regeneration process using sodium hydroxide followed by acid treatment was found to recondition the GAC so that it could absorb almost as much perchlorate in a second cycle as it did in a first cycle. Includes figures.