Recovery of boron from borax sludge of boron industry |
| |
| Authors: | Mine Özdemir İlker Kıpçak |
| |
| Affiliation: | 1. University of Southern Queensland, School of Civil Engineering and Surveying, Faculty of Health, Engineering and Sciences, West St, Toowoomba, Queensland 4350, Australia;2. University of Southern Queensland, School of Agricultural, Computational and Environmental Sciences, Faculty of Health, Engineering and Sciences, West St, Toowoomba, Queensland 4350, Australia;1. Civil Engineering Department, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia;2. Department of Civil Engineering, King Abdulaziz University, Jeddah, Saudi Arabia;1. Department of Inorganic, Analytical Chemistry and Electrochemistry, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 6, PL-44-100 Gliwice, Poland;2. Department of Chemical Engineering and Process Design, Faculty of Chemistry, Silesian University of Technology, ks. M. Strzody 7, 44-100 Gliwice, Poland;3. Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology, ks. M. Strzody 9, 44-100 Gliwice, Poland;1. Universitat Politècnica de Catalunya, Department of Chemical Engineering, EPSEVG, Av. Víctor Balaguer, s/n, 08800 Vilanova i la Geltrú, Spain;2. École des Mines d’Alès, Centre des Matériaux des Mines d’Alès, 6 Avenue de Clavières, F-30319 Alès CEDEX, France;3. Universitat Politècnica de Catalunya, Department of Chemical Engineering, ETSEIB, Diagonal 647, 08028 Barcelona, Spain |
| |
| Abstract: | A two-step process for boron recovery from borax sludge is proposed in the present work. The borax sludge was leached with sulphuric acid solution. Then, for the removal of alkaline species from the leachate, calcium and magnesium were precipitated by adjusting the pH of leachate using 1.5 M NaOH and 1.5 M HCl solutions. The effects of pH, temperature, concentration and time on the precipitation process were investigated. It was determined that the calcium and magnesium concentrations in the leachate were reduced from 121 mg/L to 2.6 mg/L and from 145 mg/L to 4.0 mg/L, respectively, at a pH value of 12, a temperature of 70 °C, an initial boron concentration of 500 mg/L and a precipitation time of 3 h. Under these optimum conditions, it was observed that the boron concentration in the solution decreased very slightly. In this process, the alkaline species were successfully separated from the boron.Finally, borax pentahydrate (Na2B4O7·5H2O) was produced by the evaporation of the final solution obtained after precipitation process. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
