Total Copper Analyzer for Rapid In Situ Characterization of Effluent Discharges
Final rept. Mar 2003-Jun 2006
SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
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The Total Copper Analyzer TCA for rapid in situ characterization of effluent discharges is the first instrument capable of continuous real-time measurement of total recoverable copper at environmentally relevant concentrations. Copper is a priority pollutant and regulatory programs require measurement of total recoverable copper. The TCA is a continuous-flow system that includes in-line acidification, digestion, and measurement of copper with a specialized jalpaite copper ion-selective electrode Cu-ISE. The preprocessed sensor data is provided to an integrated computer system, for calculation and reporting of total recoverable copper with custom software. The continuous measurement of copper takes less than 5 minutes for completion. The use of the TCA should lead to the elimination of discharge exceedances and Notices of Violation NOV, it should also allow for accurate calculations of Total Maximum Daily Loads TMDL, and decreases in cost of effluent management, as the volume of treated effluent can be minimized. The demonstration of the TCA included laboratory characterization as well as long-term testing under industrial conditions. Laboratory conditions were used for evaluation of the dynamic range, precision, and interference by metals and humic acids. The response of the Cu-ISE is affected by the salinity i.e., conductivity of the water, and by the ambient temperature however, once these parameters are controlled and kept relatively constant, the TCA responds linearly to copper concentration in the effluent.
- Electrical and Electronic Equipment
- Properties of Metals and Alloys
- Water Pollution and Control