Szczegóły publikacji
Opis bibliograficzny
Mg/Al LDH enhances sulfate removal and clarification of AMD wastewater in precipitation processes / Paulina MAZIARZ, Jakub MATUSIK, Tiina Leiviskä // Materials [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1996-1944. — 2019 — vol. 12 iss. 14 art. no. 2334, s. 1–13. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 13, Abstr. — Publikacja dostępna online od: 2019-07-23
Autorzy (3)
- AGHMaziarz Paulina
- AGHMatusik Jakub
- Leiviskä Tiina
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 124138 |
|---|---|
| Data dodania do BaDAP | 2019-09-23 |
| Tekst źródłowy | URL |
| DOI | 10.3390/ma12142334 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Materials |
Abstract
The sulfate removal from acid mine drainage (AMD) water (initial concentration: 5301 mg/L) was investigated by precipitation and/or adsorption using calcium hydroxide (Ca(OH)(2)) and synthetic layered double hydroxide (LDH) of the Mg/Al type. The exclusive use of LDH efficiently removed sulfates (64.2% reduction); however, alteration of its structure was observed due to low pH. The use of Ca(OH)(2) in different doses calculated in relation to gypsum stoichiometry allowed to achieve an 86% removal of sulfates. Depending on the equilibrium pH, gypsum or ettringite were the main identified phases. The two-step removal, involving the use of Ca(OH)(2) followed by LDH, was less efficient than the use of the Ca(OH)(2)/LDH mixture when the stoichiometric amount of Ca(OH)(2) in relation to gypsum was applied. The application of mixture resulted in a fast pH increase, which prevented destruction of the LDH structure. Most importantly, the use of mixture significantly reduced the sludge volume and enhanced its settling velocity.
