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Waste Management & Research, Vol. 13, No. 4, 335-342 (1995)
DOI: 10.1177/0734242X9501300405

Evaluation of the Homogeneity of Stabilised/ Solidified Wastes By a Video Imaging Technique

Yi-Min Gao

Department of Chemical Engineering, Chemistry and Environmental Science, New Jersey Institute of Technology, 323 Martin Luther King Boulevard, Newark, New Jersey 07102, U.S.A.

Mei Liu

Department of Chemical Engineering, Chemistry and Environmental Science, New Jersey Institute of Technology, 323 Martin Luther King Boulevard, Newark, New Jersey 07102, U.S.A.

James M. Grow

Department of Chemical Engineering, Chemistry and Environmental Science, New Jersey Institute of Technology, 323 Martin Luther King Boulevard, Newark, New Jersey 07102, U.S.A.

Dana E. Knox

Department of Chemical Engineering, Chemistry and Environmental Science, New Jersey Institute of Technology, 323 Martin Luther King Boulevard, Newark, New Jersey 07102, U.S.A.

A video imaging technique is described for the homogeneity assessment of wastes that have been treated by stabilisation/solidification (S/S). The method incorporates a fluorescent tracer into the S/S reagent. A test "waste" consisting of an artificial soil was stabilised/solidified with varying degrees of mixing using Portland cement as the S/S reagent. The tracer distribution was monitored with a video camera, and the cement distribution was determined by chemical analysis for calcium. Measurement of the homogeneity of the products by the video imaging technique gave results comparable to those obtained by the chemical analysis. The results warrant use of the video imaging technique in field applications since it is easier, cheaper and faster than traditional chemical methods. © 1995 ISWA

Key Words: Video • image • analysis • homogeneity • waste treatment • stabilisation • solidification.


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