Remediation of chromium-containing soils by heap leaching: Column study

Adrian T. Hanson, Brian Dwyer, Zohrab A. Samani, Don York

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Efforts are being made to devise technologies and treatment systems to remediate contaminated soil on site without generating significant wastes for off-site disposal. Heap leaching, a technique used extensively in the mining industry, has been investigated as a method for remediation of hazardous metal contamination of the vadose zone. In the mining industry, metal bearing ore is excavated and mounded on a pad. The metals are removed by passing a special leaching solution through the ore. In this study, the removal of Chromium (VI) from four New Mexico soils (sand, sandy loam, and clay) using heap leaching was evaluated at a column scale. The heap leaching study demonstrated greater than 99% removal of Cr(VI), using tap water as the leaching agent. The soils were typical of arid climate soils with low organic content (<1%).

Original languageEnglish (US)
Pages (from-to)825-841
Number of pages17
JournalJournal of Environmental Engineering (United States)
Issue number5
StatePublished - Sep 1993


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