Extraction and Leaching Tests

Samples of industrial metal-bearing sludges have been processed in our laboratory under various conditions to evaluate the CBI technology. These waste samples are identified as A, B, and C and their constituent hazardous elements are presented in Table 1. The sludges were acquired in small quantities from two California fabricators of metal products, and are representative of industrial wastes. Table 1 also identifies the type of metal fabrication process from which each of the sludges was generated. 

The standard California tests6 for solubility in strong and weak acids were performed on samples of the unmixed wastes and waste/additive mixtures, both before and after thermal processing. Analytical testing was performed by a state-certified laboratory, and results were compared to California TTLC (strong acid) and 

Spent Nickel Plating Bath (Hard Disk Manufacturer) - contains cobalt, nickel and zinc. 

Chemical Milling Waste (Aircraft Parts Manufacturer) - contains chromium, copper and zinc. 

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