| Autor: |
Carreno, C., Vite, M., Vite, J. |
| Předmět: |
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| Zdroj: |
International Journal of Environment & Pollution; 1997, Vol. 8 Issue 1/2, p201, 0p |
| Abstrakt: |
We have previously patented a process for the extraction of toxic and valuable metals from foundry sands using a thermostatted column. Inthis paper, we describe a similar device for the removal of toxic metals from wastewater sludge. The wastes were finely ground and suspended in an aqueous pulp, and 10--40 g of mineral acid or sodium hydroxide were added to reach a pH of 2, 5.7 and 10, together with 4--10 g of a bisulphite and 0.3--1.5 g of sodium dodecyl sulfate. In some cases, this method can remove 100% of heavy metals from samples of various wastewater sludges. To study the removal efficiency of heavy metals, we used inductively coupled plasma atomic emission spectrometry (ICP-AES). The metallic alloys in the samples were studied by X-ray diffraction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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