| Electrolytic recovery of chromium salts from tannery wastewater. | |
| | |
MedLine Citation:
|
PMID: 17451875 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Tannery wastewater collected from a local leather industry in Peshawar, Pakistan was subjected to DC electrolysis in a simple cell having two static sheet electrodes and stirring assembly after proper dilution and adjustment to desired conditions. One percent HNO(3) and 1% NaHCO(3) were used as electrolytes and pH adjusters. The latter salt also worked as sodium source for anodic deposition of Na(2)Cr(2)O(7). Various combinations of electrodes were tested and conditions optimized for best electrode couple with increased recovery and removal of chromium in the form of Cr(OH)(3) and/or Na(2)Cr(2)O(7) at cathode and anode, respectively. The recovery of 99% chromium was achieved after 2h electrolysis at a cell potential of 1.0 V, pH 5.0 and stirring rate of 500 rpm using Pb sheet as anode and Cu sheet as cathode. The most interesting and novel finding of this work was the recovery of the mentioned salt(s) alone at Cu cathode or Pb anode or collectively at both electrodes by proper control of pH. Such treatment not only minimizes the environmental water pollution, but results in the formation of useful products employed for recycling purpose in tannery or other related industry to make the process economical. |
| | |
Authors:
|
Sirajuddin; Lutfullah Kakakhel; Ghosia Lutfullah; Muhammad Iqbal Bhanger; Afzal Shah; Abdul Niaz |
Related Documents
:
|
18849115 - Electrocoagulation of simulated reactive dyebath effluent with aluminum and stainless s... 15856115 - Volatile solvent-free solid-state polymer-sensitized tio2 solar cells with poly(3,4-eth... 15110275 - Application of integrated secm ultra-micro-electrode and afm force probe to biosensor s... 19053655 - Can water store charge? 20701365 - Electrical memory characteristics of a nondoped pi-conjugated polymer bearing carbazole... 20830905 - Fate of effluent-borne contaminants beneath septic tank drainfields overlying a karst a... |
Publication Detail:
|
Type: Journal Article Date: 2007-03-12 |
Journal Detail:
|
Title: Journal of hazardous materials Volume: 148 ISSN: 0304-3894 ISO Abbreviation: J. Hazard. Mater. Publication Date: 2007 Sep |
Date Detail:
|
Created Date: 2007-09-03 Completed Date: 2008-01-07 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9422688 Medline TA: J Hazard Mater Country: Netherlands |
Other Details:
|
Languages: eng Pagination: 560-5 Citation Subset: IM |
Affiliation:
|
National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan. drsiraj03@hotmail.com |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adsorption Chromium / chemistry* Electrochemistry / instrumentation Electrodes Electrolysis / instrumentation* Hydrogen-Ion Concentration Industrial Waste* Pakistan Tanning* Water Pollutants, Chemical / chemistry* |
| Chemical | |
Reg. No./Substance:
|
0/Industrial Waste; 0/Water Pollutants, Chemical; 7440-47-3/Chromium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Expression of the high mobility group A family member p8 is essential to maintaining tumorigenic pot...
Next Document: Results of interlaboratory comparisons of column percolation tests.