Synthesis of reactive MgO from reject brine via the addition of NH4OH

Dong, H., Unluer, C. , Yang, E.-H. and Al-Tabbaa, A. (2017) Synthesis of reactive MgO from reject brine via the addition of NH4OH. Hydrometallurgy, 169, pp. 165-172. (doi: 10.1016/j.hydromet.2017.01.010)

Abstract

Reactive magnesia (MgO) with a high purity and reactivity is used in several high-end applications. This study reports the feasibility of synthesizing high reactivity MgO from reject brine with the use of NH4OH. The molar amount of NH4OH was optimized at a NH4OH/Mg2 + molar ratio of 6 to provide maximum magnesium oxide yield and purity. This led to the synthesis of Mg(OH)2 with a purity of 93.5%, which was further calcined at 500 °C for 2 h to produce reactive MgO with a SSA of 78.8 m2/g. This study shed light on the significant potential of reject brine in the recovery of Mg2 + and the synthesis of reactive MgO with a wide range of potential applications.

• Item Type: Articles
• Additional Information: The authors would like to acknowledge research scholarship from Energy Research Institute at Nanyang Technological University.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Unluer, Dr Cise
• Authors: Dong, H., Unluer, C., Yang, E.-H., and Al-Tabbaa, A.
• College/School: College of Science and Engineering > School of Engineering > Infrastructure and Environment
• Journal Name: Hydrometallurgy
• Publisher: Elsevier
• ISSN: 0304-386X
• ISSN (Online): 1879-1158
• Published Online: 01 February 2017