Negrea Petru and Ciopec Mihaela and Muntean Cornelia and Gârban Gabriela and Lupa Lavinia and Negrea Adina: Studies on the purification of wastewaters with high nickel ions content.
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Abstract
The paper presents studies on the removal of nickel from wastewaters with high nickel ions content resulting from galvanizing process. In the first step of the purification process, nickel ions were precipitated using a 10 M NaOH solution as precipitation agent. By increasing the pH of the Ni2+ solutions up to 11, the residual concentration of nickel ions reached the values required for the discharge in sewerage and in water resources. Taking into account that this pH value does not allow the discharge, the solution resulting from the precipitation process at pH 9 was submitted in the second step to an advanced treatment using as adsorbent material an Amberlite XAD-4 resin impregnated with di-2(ethyl-hexyl) phosphoric acid. To establish the conditions for the adsorption process was studied the influence of contact time and of adsorbent dosage on the efficiency of nickel ions removal from the solution. The maximum efficiency of ~ 94% was reached after 90 min for an adsorbent dosage of 0.3 g:25 mL. The residual concentration of nickel ions was ~0.5 mg/L, value that allows the discharge in the sewerage and even in water resources.
| Item Type: | Conference or Workshop Item |
|---|---|
| Journal or Publication Title: | Proceedings of the International Symposium on Analytical and Environmental Problems |
| Date: | 2012 |
| Volume: | 17 |
| ISBN: | 978-963-315-066-5 |
| Page Range: | pp. 291-294 |
| Language: | English |
| Publisher: | SZAB |
| Place of Publication: | Szeged |
| Event Title: | International Symposium on Analytical and Environmental Problems (17.) (2011) (Szeged) |
| Event Type: | Conference |
| Event Location: | Szeged |
| Event Dates: | 2011. szeptember 19. |
| Related URLs: | http://acta.bibl.u-szeged.hu/76381/ |
| Uncontrolled Keywords: | Szennyvíztisztítás |
| Additional Information: | Bibliogr.: 294. p. ; ill. ; összefoglalás angol nyelven |
| Subjects: | 01. Natural sciences 01. Natural sciences > 01.06. Biological sciences |
| Date Deposited: | 2022. Aug. 10. 11:42 |
| Last Modified: | 2022. Aug. 22. 10:23 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/76446 |
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