The remediation performance of a specific electrokinetics integrated with zero-valent metals for perchloroethylene contaminated soils.
This research was conducted to evaluate an integrated technique, combination of the electrokinetics (EK) and zero-valent metal (ZVM), for remediation of the perchloroethylene (PCE) contaminated soils. Various experimental conditions were controlled such as different voltage gradients, the position of ZVM, and ZVM species. The appropriate operational parameters are concluded as follows: (1) 0.01 M sodium carbonate serves as the working solution; (2) the voltage gradient is controlled at 1.0 V/cm; (3) ZVM wall is settled close to the anode. Based on the above operation conditions, the pH value of working solution can maintain at neutral range for avoiding the soil acidification. Neutral pH also causes the system to stay at a stable status of electricity consumption. The removal efficiency reaches 99% and 90% for decontaminating the PCE in the pore-water and the soil, respectively, after a 10-day treatment. The zero-valent zinc performs better PCE degradation than zero-valent iron. Moreover, the soils treated by EK+ZVM still possess their original properties.
Chang
Jih-Hsing
JH
Department of Environmental Engineering and Management, Chaoyang University of Technology, Wufong, 168 GiFong East Road, WuFong Hsiang, 413 Taichung County, Taiwan. changjh@cyut.edu.tw
Cheng
Shu-Fen
SF
D001673:Biodegradation, Environmental; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry; D012989:Soil Pollutants / Q000302:isolation & purification*; D013750:Tetrachloroethylene / Q000302:isolation & purification*; D015032:Zinc / Q000737:chemistry
D012989:Soil Pollutants; D007501:Iron; D015032:Zinc; D013750:Tetrachloroethylene