The aim of this study is to investigate the performance of batch electro coagulation (EC) using iron electrodes with bipolar configuration for simultaneous removal of chromium (Cr3+) from synthetic wastewater. The influences of current density (from
2 to 25 mA/cm2), initial metal concentration (from 100 to 250 mg/L) and supporting electrolyte (0-12 mmol/L Na2SO4) on removal efficiency are explored in a batch stirred cell to determine the best experimental conditions.
The results indicate that EC was very efficient to remove Cr3+ from the synthetic wastewater having an initial concentration of 250 mg/L of Cr3+ under the best experimental conditions. At the current density of 15 mA/cm2 with a total energy consumption of ∼18.5 kWh/m3, more
than 98.7% removal value was achieved for Cr3+ after 20 min EC treatment. Time of 20 minutes EC treatment was chosen as optimum time to gain less than 4 mg Fe/L in the treated water.
The purpose of this study was to evaluate the success of Formocresol
pulpotomy compared with Ferric sulfate and Electro coagulation and Laser
pulpotomy in primary teeth. Fourty seven primary second molars of
children aged 5-8 years, were divided r
andomly into four groups: 10
Formocresol , 13 Ferric sulfate , 13 Electro coagulation, 10 Laser.
All teeth were filled with ZOE and sealed with Compomer, and S.S.Crown
as final restoration.
The success rate was 90 % - 84.6 % - 84.6 % - 83.3 % respectively.
These differences were not statistically significant p=0.05), but there were a
relation between the pretreatment physiologic resorption of roots and the
type of hemorrhage during the amputation procedure.
This study revealed that Ferric sulfate, and Electro coagulation, and Laser
pulpotomy are good alternative to Formocresol pulpotomy.
