Work

Removal of Iron(II) as Magnetite from Acid Mine Water

Year: 2024

Type: article

Abstract: The High-Density Sludge (HDS) process is widely used for the treatment of acid mine water as it produces a sludge of high density. The aim of this study was the development of a process where iron in mine water can be removed as magnetite, to assist with rapid settling of sludge. It was concluded that Fe2+ can be removed as Fe3O4 (magnetite) by forming Fe(OH)2 and Fe(OH)3 in the mole ratio of 1:2. Magnetite can form in the absence or presence of gypsum. The settling rate of magnetite-rich sludge is substantially faster than that of ferric hydroxide-rich sludge. It is recommended that further studies be carried out on the separation of magnetite gypsum through magnetic separation.

Source: Minerals

DOI: 10.3390/min14121256

Authors: Mokgadi Gladness Rapeta, Johannes Philippus Maree, Titus Makudali Msagati

Institution: University of South Africa

Language: English

Topic: Mine drainage and remediation techniques

Subfield: Environmental Chemistry

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $2,728