| 摘要 |
A coal gasifier slag composition, and process utilizing a coal gasifier slag composition for the removal of a metal ion, or the ions of a plurality of metals, from an aqueous medium by contact of said coal gasifier slag composition with said aqueous medium. The coal gasifier slag, which is regenerable by contact with a dilute acid, is employed as a contact mass for the removal from an aqueous medium of a metal ion, or the ions of a plurality of metals, derived from Groups IB through VIIB, IIA through VA, and VIII of the Periodic Table of the Elements. The coal gasifier slag is useful for removing a metal ion, or the ions of a plurality of metals, from industrial waste water, groundwater, mine water and the like, or as a landfill, or as a protecting layer adjacent to or surrounding land fills, surface impoundments, tank farm beds and the like.
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