摘要：n this research, electrocoagulation technology was used to treat high fluorine content geothermalwater. The fluoride removal performance and operating costs have also been discussed. The resultsshowed that electrocoagulation was an ideal technology to remove fluoride ions from geothermalwater, and did not need to change the pH value and temperature of raw water. During the staticexperiments, for electrolysis time of 15 min, plates spacing of 0.5 cm, area of plates/volume ofwastewater of 80 m 2 /m 3 , current density of 4.5 mA/cm 2 and no adjusted pH, the highest removalefficiency of fluorine from geothermal water was achieved. Under these operating conditions, thefluoride concentration of effluent water was 0.8 mg/L or so, which fully met the drinking water healthstandard (0.5 mg/L < F - < 1.0 mg/L). Meanwhile, the energy consumption was evaluated under variousoperating conditions. And it would be affected by some different parameters. Besides, dynamicexperiments were carried out when optimum parameters were selected after static experiments.When the current density of 10 A/m 2 , the system effluent fluoride concentration was about 1.4 mg/L,and the process did not meet the requirements, so current densities were adjusted to 12.5 A/m 2 and 15A/m 2 , while the effluent fluoride concentration was about 1.2 mg/L and 0.8 mg/L, respectively.
关键词：Defluoridation;Fluorine;Electroflocculation;Geothermal water
