Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : current density


Removal of high concentration phenol from aqueous solutions by electrochemical technique

Shaimaa T. Alnasrawy; Ghayda Y. Alkindi; Talib M. Albayati

Engineering and Technology Journal, 2021, Volume 39, Issue 2A, Pages 189-195
DOI: 10.30684/etj.v39i2A.1705

In this study, the ability of the electrochemical process to remove aqueous high concentration phenol using an electrochemical cell with aluminum anode and cathode was examined. The removal rate of phenol was monitored using different parameters phenol concentration, pH, electrolysis time, current density, and electrode distance. Obtained results indicated that the low removal rates of phenol were observed at both low and high pH. However, the removal rate of phenol increased with an increase in the current density, each electrochemical process conditions need a certain electrodes distance. removal rate of phenol decreased with the increase in the initial phenol concentration. The maximum removal rate of phenol obtained from this study was 82%.

Intervening of Electrochemical Machining Parameters on Particle Size of ZnO Powder and Metal Removal Rate

H.S. Mohammed; S.K. Shather

Engineering and Technology Journal, 2017, Volume 35, Issue 5, Pages 431-438

Electrochemical machining (ECM) is an advanced machining process belonging to electrochemical category. Where in the material removal takes place by anodic dissolution of work piece in an electrolytic solution. This research presents results of the Electrochemical Machining (ECM) process, which was used to remove metal from the internal hole of the work piece (pure Zinc) by brass tool in an aqueous solution NaCl solution. The experimental study the effect of (ECM) process parameters such as (Current density, Gap distance, Electrolyte concentration) on Metal Removal Rate (MRR) and particle size of (Zinc oxide) sludge waste that precipitate from ECM. X-ray diffraction pattern for the resultant powder shows well-crystallized Zinc oxide powder The results indicated that particle size decreases from (82.432 to 24.6μm) and enhancement of MRR by (58.15%) with increasing current density. The increasing in gap distance between tool and work piece from (0.5 to 1.5) mm causes increasing in particle size from (76.451 to 91.81) μm and decrease (MRR) to (11.07%). For electrolyte concentration increasing from (100 to 300 g/l) leads to decrease in particle size from (89.218 to 32.406) μm, while improvement in MRR by (4.83%).