Electrical Behavior of Copper Mine Tailings During EKR with Modified Electric Fields
| Autor: | Henrik K. Hansen, Paulina Santis, Carlos Jorquera, Adrian Rojo, Paula Inostroza, Omara Monárdez |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Health Toxicology and Mutagenesis chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Toxicology 01 natural sciences Electric charge Mining Soil Electricity Electric field Polarization (electrochemistry) Environmental Restoration and Remediation Electronic filter 0105 earth and related environmental sciences Polarity reversal Condensed matter physics General Medicine 021001 nanoscience & nanotechnology Pollution Tailings Copper Kinetics chemistry 0210 nano-technology Voltage |
| Zdroj: | Bulletin of Environmental Contamination and Toxicology. 98:304-309 |
| ISSN: | 1432-0800 0007-4861 |
| DOI: | 10.1007/s00128-016-1858-8 |
| Popis: | Electro-kinetic remediation (EKR) with sinusoidal electric field obtained simultaneously with DC/AC voltage reduce the polarization of the EKR with DC voltage. The DC voltage value defines the presence of a periodic polarity reversal of the cell and the electrical charge for electro-kinetic transport. In this case, the AC frequency favors the breaking of polarization conditions resulting from the EKR with DC voltage. However, with high frequencies a negative effect occurs where the tailings behave as a filter circuit, discriminating frequencies of an electric signal. The goal of this work is to analyse the electrical behaviour of tailings in EKR experiments. The conditions selected were: DC/AC voltages: 10/15 and 20/25 V (peak values), and AC voltage frequencies 50-2000 Hz. When the AC frequency reaches 2000 Hz, the copper removal tends to zero, indicating that the tailing behaves as a high-pass filter in which the DC voltage was filtered out. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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