Cleaning Up Chromium
Cleaning Up Chromium
复制标题
清理铬
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
Loren C. McPhillips
中科院分区：
文献类型：
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作者：
W. McKinley;R. Pratt;Loren C. McPhillips
从1956年到1985年，位于俄勒冈州科瓦利斯的联合铬制品厂对环境造成了持续的破坏。泄漏的电镀水箱和冲洗水排放到一个处理坑中，造成了设施下方的土壤和地下水污染。在电镀槽附近，铬污染大于60,000毫克/公斤土壤，地下水污染超过19,000毫克/L铬。在附近的排水沟，地表水污染超过200毫克/L铬。始于1988年的超级基金补救行动至今仍在继续，数据显示清理工作取得了成功。自1988年8月15523加仑以来，每月的地下水开采量一直在稳步攀升。被提取出来，给了502,000个女孩。它们于1991年12月被移除。与此同时，地下水中铬的浓度从平均1,923毫克/L逐步下降到65毫克/L。工程师们已经证明，通过渗透-提取、抽水和处理系统，传统的土壤和地下水修复技术具有很小的灵活性，可以克服复杂的岩土条件。更重要的是，该项目的影响超出了科瓦利斯遗址的范围。铬的清理带来了问题，不是因为个别补救的规模，而是因为全国各地有大量受污染的场地。根据Corvallis的结果，EPA正在将这个项目作为清理类似污染地点的典范。
From 1956 to 1985, the United Chrome Products plant in Corvallis, Oregon, took a steady toll on the environment. Leaky plating tanks and the discharge of rinse water into a disposal pit caused soil and ground-water contamination underlying the facility. Adjacent to the plating tanks, contamination was greater than 60,000 mg chromium/kg soil and ground-water contamination exceeded 19,000 mg/l chromium. In nearby drainage ditches, surface-water contamination exceeded 200 mg/l chromium. Superfund remediation, which began in 1988, continues today, and data indicates that the cleanup has been a success. Monthly ground-water extraction has climbed steadily since August 1988, when 15,523 gal. were extracted, to the 502,000 gal. that were removed in December 1991. Meanwhile, the concentration of the chromium in the ground water has been progressively declining from an average of 1,923 mg/l to 65 mg/l. Using an infiltration-extraction, pump and treatment system, engineers have demonstrated that with a little flexibility, conventional remediation techniques for soil and ground water can overcome complex geotechnical conditions. More significantly, the project has implications that extend beyond the Corvallis site. Chromium cleanups pose problems, not because of the size of the individual remediations, but because of the large number of contaminated sites throughout the country. Drawing from the results at Corvallis, EPA is using this project as a model of what can be done to clean up similarly polluted sites.