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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Keshmirizadeh, Elham Yousefi, Somayeh Rofouei, Mohammad Kazem |
| Description | Country affiliation: Iran Author Affiliation: Keshmirizadeh E ( Applied Chemistry Department, Islamic Azad University, Karaj Branch, P.O. Box: 31485-313, Iran.) |
| Abstract | The performance of an electrocoagulation (EC) process with aluminum/iron electrodes for removal of chromium on laboratory scale was studied. The effect of operational parameters such as initial pH, current density (CD), reaction time, initial concentrations (50, 100, 500, 1000 mg/L), solution conductivity, electrical energy consumption (EEC) and type of circuit were studied in an attempt to reach higher Cr(VI) removal efficiency. Alternating pulse current (APC) was used to prevent the passivity or polarization of electrodes. Important operating parameters were optimized to access higher (99%) Cr(VI) removal efficiency as follows: EEC range: 4-58 kW h/m(3) wastewater, CD: 56-222 A/m(2), operating time: 20-110 min, pH 3-9 (pH(optimum) 5), voltage: 15-25 V. NaCl, KCl, PAC (poly aluminum chloride), NaNO(3) were used as supporting electrolytes. NaCl as well as KCl handled the EC with the best performance in every aspect; however, PAC and NaNO(3) did not have the same results (Applied conductivity is better than literature). The results of this work are comparable with those of recent studies. Equal removal efficiency was obtained in 'direct current' (DC) and (APC); however, when 'APC' was used, water recovery (0.92 m(3)/m(3) wastewater) was significant and the turbidity was 1 NTU. 'APC' amazed our experimental team. |
| ISSN | 03043894 |
| Issue Number | 1-3 |
| Volume Number | 190 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-06-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Chromium Chemistry Electrochemical Techniques Methods Water Pollutants, Chemical Electric Conductivity Electricity Electrodes Hydrogen-ion Concentration Water Purification Journal Article Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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