TY  - JOUR
VL  - 3
JF  - Journal of Environmental Chemical Engineering
N1  - cited By 22
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938312087&doi=10.1016%2fj.jece.2015.05.015&partnerID=40&md5=16e72dce662efda1132d76717dae4758
A1  - Ezechi, E.H.
A1  - Hasnain Isa, M.
A1  - Kutty, S.R.B.M.
A1  - Ahmed, Z.
Y1  - 2015///
AV  - none
SP  - 1962
PB  - Elsevier Ltd
EP  - 1973
ID  - scholars5806
IS  - 3
TI  - Electrochemical removal of boron from produced water and recovery
KW  - Borate minerals; Boron; Coagulation; Current density; Dyes; Electrodes; Kinetics; Metal recovery; Mineralogy; Recovery; Surface properties; Thermodynamics
KW  -  Electro coagulations; Hydrothermal mineralization; Iron electrodes; Produced water; Response surface methodology
KW  -  Chemicals removal (water treatment)
N2  - This study investigated boron removal from produced water by electrocoagulation using iron electrode and subsequent recovery by hydrothermal mineralization. Batch preliminary experiments conducted with synthetic wastewater were designed using Box Behken Model of the Response Surface Methodology (RSM) to evaluate four independent variables (pH, current density, initial boron concentration and contact time). The optimum conditions obtained (pH 7, current density 12.5 mA/cm2, contact time 90 min) resulted in 98 boron removal from initial boron concentration of 10 mg/L. The optimization process was achieved by RSM, Boron removal increased when current density and contact time were elevated. Removal efficiency also increased when pH was increased from 4 to 7 and subsequently decreased at pH 10. Boron removal from produced water reached 97.6 at applied optimum conditions. Adsorption kinetics were evaluated using the Pseudo First and Second order models, Elovich and Intraparticle diffusion models. Kinetic data fitted best to Pseudo Second order kinetic model. Thermodynamics were investigated and signifies that boron adsorption was exothermic with decreasing negative values of the free energies indicating reaction spontaneity. The hydrothermal mineralization study showed that rare hydrated borate minerals (Inyoite, Parasirbiskite and Vimsite) can be recovered as recyclable precipitate from EC flocs of produced water. © 2015 Elsevier Ltd. All rights reserved.
SN  - 22133437
ER  -