TCLP leachate

Lowest available toxicity characteristic leaching procedure (TCLP) leachate levels for any process treating EAF dust. 

The recovery of valuable metals and metal alloys from hazardous metal sludges is technically and economically viable. Small quantities of excess slag are produced and this slag can be recycled into concrete blocks. The E.P. and TCLP leachate limits are met with the slag. 

The next phase of the experiment was the determination of the kinetics involved in the metal-binding reactions within the CHEMFIX product matrix. Eight (8) samples of each SSM were treated by the CHEMFIX process at the optimum reagent ratio. A TCLP extraction was performed 0, 1, 3, 5, 8, 24, 48 and 72 hours after treatment. The TCLP leachate from each sample was analyzed for target metals concentration. 

TREATED SSM 1 TCLP LEACHATE METALS CONCENTRATION, mg/1 AFTER TREATMENT... 

Specific Activities in Ra-Containing Waste (as-received), Waste Form (calculated), and TCLP Leachate. 

The Na level in the original waste was 3.26 wt%, and its level in the waste form was 1.08 wt%. In the TCLP leachate, it was only 634 mg/1. This partial Na immobilization may be due to the formation of less soluble compounds, such as MgNaP04 H20, and their subsequent microencapsulation within the matrix. It is very difficult to identify such compounds by X-ray diffraction smdies, because they are invariably glassy phases and are only represented by broad humps in the X-ray diffraction pattern. 

Copper TCLP Leachate 500 various State (USA) regulations... 

TABLE 9 Regulatory Limits for Drinking Water and TCLP Leachate for Several Elements that Comprise Lead-free Solders (After Smith and Swanger, Ref. [29], 1999)... 

Copper TCLP leachate 500 Various state regulations... 

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