Method For Determining Leachability Toxicity Characteristic Leaching Procedure Essay

809 WordsMay 22, 20164 Pages
6.4.11 Method for Determining Leachability  Toxicity Characteristic Leaching Procedure (TCLP) Reference: USEPA Method 1311 • Apparatus: 1. Agitation apparatus: The agitation apparatus must be capable of rotating the extraction vessel in an end-over-end fashion at 30 ±2 rpm. 2. Extraction vessels: Jars or bottles with sufficient capacity to hold the sample and extraction fluid. Two liter normal capacity bottles are recommended. The vessel type is determined by the analysis of interest. 3. Filtration devices 4. Filter holders: Any filter holder, which meets all of the following requirements. Capable of supporting a 0.6 to 0.8 µm glass fiber filter membranes. Has a minimum internal volume of 300 ml (1.5 L recommended) can hold a filter of minimum size 47 mm in diameter (142 mm filter diameter recommended). Positive pressure filtration units capable of exerting pressures of 350 KPa or more which are commonly called “Hazardous Waste Filtration Units”. 5. NOTE: If the leachate is to be analyzed for metals, the filter must be prewashed with 1 M nitric acid, rinsed with double distilled water (DDW) and dried before use. Acid washed filters may also be used for other non-volatile extracts. 6. pH meter: Calibrated to within ± 0.05 pH units at 25°C. • Reagents All reagents should be of recognized analytical reagent grade. 1. Nitric Acid, 1M 2. Hydrochloric Acid, 1M 3. Sodium Hydroxide, 1M 4. Glacial Acetic Acid • Extraction Fluid Extraction fluid No 1: Add 5.7 ml of
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