Determination of the Environmental TCLP Metals in Waste-Waters, Solid Wastes, and Soils by Flame Atomic Absorption Spectrophotometry
Hazardous wastes can originate from many sources – industrial processes, product formulations, synthetic operations, virtually any manufacturing business. The nature and composition of the “wastes” can vary so much that one industry’s discharge can serve as another’s raw materials. It is the tremendous transfer of these materials – their storage, transportation, spillage and leakage into the environment – which has caused great concern. Regulation of these discharged solid and liquid materials is a crucial part of the U.S. EPA and the State-level Departments of Environmental Protection programs for defining the “degree of hazard” of a particular material. The basic methods describe procedures to “leach” any soluble heavy metals from samples using acid(s) (to simulate acid rain, for example). While there is a lot of printed material available from these Government agencies, the basic protocols for the collection and preparation of this type of sample is referenced in the Standard Methods of SW- 846 as part of the Resource Conservation and Recovery Act (RCRA).