Title:
【発明の名称】クリノプチロライトを用いる鉛含有の環境に危険な産業廃棄物の固定方法
Document Type and Number:
Japanese Patent JPH06502801
Kind Code:
A
Abstract:
There is provided a method for the ecologically safe disposal of lead-contaminated hazardous industrial wastes (such, as for example, those generated as discardable by-products in primary and secondary lead smelting operations, especially, blast furnace slags and matte), which comprises reducing the size of the lead-contaminated industrial wastes and treating them, prior to encapsulation in a hardenable material, with the naturally occuring zeolite, clinoptilolite, in an amount sufficient to prevent lead ions (Pb<+2>) from leaching out of such industrial wastes, through exposure to the action of atmospheric agents (e.g., hot air and rain, or as a result of cyclical freezing and thawing in temperature climates), even over an extended period of time.
Inventors:
Graves, Paul Raymond, Junior
Application Number:
JP50550093A
Publication Date:
March 31, 1994
Filing Date:
September 10, 1992
Export Citation:
Assignee:
GN Technologies, Inc.
International Classes:
A62D3/33; B09B3/00; C04B28/02; A62D101/43; (IPC1-7): B09B3/00; B09B3/00
Attorney, Agent or Firm:
Shoichi Ui (4 others)