In this research the electroplating method of chromium was used on
iron ore (steel), it is one of the coating methods for the formation of
a roof cover using chromium (III) chloride salts as a source of
chromium and sulfuric acid as a catalyst.
Gadolinium gallium garnet Gd3Ga5O12 (GGG) co-doped with chromium and
neodymium have attracted attention as an active material for high power solid state
laser.
In this work, the performance of batch electrocoagulation (EC) treatment using iron
electrodes with monopolar and bipolar electrode configurations for trivalent chromium (Cr
(III)) removal from a synthetic wastewater was investigated. The influence
s of current
density (from 2 to 25 mA/cm2) and initial metal concentration (from 100 to 250 mg/L) on
the removal efficiency were explored in a batch stirred cell for monopolar and bipolar
configurations.
Removal of Cr (III) by EC process from aqueous solution with both monopolar and
bipolar electrode configurations was a feasible process. For the initial Cr (III)
concentration of 250 mg/L, almost complete removal (99.88%) of Cr (III) was noted after
20 min of EC in case of bipolar electrode arrangement at 25 mA/cm2 with 4.5 mmol/L of
supporting electrolyte (Na2SO4) against 89.58% of Cr (III) removal for monopole electrode
configuration.
At the same electrolysis time, the power consumption was 47 and 15.3 kWh/m3 in
case of monopolar and bipolar configuration respectively for the previous removal
conditions.
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.
In this work, the performance of batch electrocoagulation (EC) treatment using iron electrodes with
monopolar configuration for trivalent chromium (Cr3+) removal from a synthetic wastewater was
investigated. The influences of current density (from
2 to 25 mA/cm2) and initial metal concentration
(from 50 to 250 mg/L) on the removal efficiency were explored in a batch stirred cell to determine the
best experimental conditions.
