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Details van artikel 21 van 108 gevonden artikelen
| Titel: |
Chromium (III) Removal and Recovery from Tannery Wastewater by Precipitation Process |
| Auteur: |
Abass. Esmaeili, Reza. Vazirinejad Alireza. Mesdaghi nia |
| Verschenen in: |
American journal of applied sciences |
| Paginering: | Jaargang 2 (2005) nr. 10 pagina's 1471-1473 |
| Jaar: |
2005 |
| Inhoud: |
Chromium(III) salts are the most widely used chemicals for tanning processes, but 60%-70% of total chromium salts reacts with the hides. In the other word, about 30%-40% of the chromium amount remains in the solids and liquid wastes (especially spent tanning solutions). Therefore, the removal and recovery of the chromium content of these wastewaters is necessary for environmental protection and economic reasons. Removal and recovery of chromium were carried out by using precipitation process. To this purpose, three precipitating agents calcium hydroxide, sodium hydroxide and magnesium oxide were used. The effects of pH, stirring time, setteling rate and sludge volume were studied in batch experiments. Results show that the optimum pH is 8-9 and the good sludge with high setteling rate and lower volume obtain by MgO precipitating agent. Hence the MgO is a good precipitating agent for removal and recovery of chromium from tanning wastewater. |
| Uitgever: |
Science Publications (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 21 van 108 gevonden artikelen
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