TY - JOUR
T1 - Potential chemical oxo-precipitation (COP) for remediating wastewater with a high boron concentration using H2O2/Ba(OH)2 at room temperature
AU - Lin, Jui Yen
AU - Shih, Yu Jen
AU - Chen, Po Yen
AU - Huang, Yoa Hui
N1 - Publisher Copyright:
© 2014 The Authors.
PY - 2014
Y1 - 2014
N2 - Among current approaches for removing boron, chemical precipitation is widely used for treating wastewater that contain a high boron concentration. The need for heating and very large amounts of coagulant limits the efficiency of this method. Accordingly, this work developed a chemical oxo-preceipitation (COP) method, which uses hydrogen peroxide (H2O2) as the oxidant and barium hydroxide (Ba(OH)2) as the precipitant to improve considerably the chemical precipitation of wastewater with a high concentration of boron at room temperature. Under suitable conditions (pHi 9, mole ratio of H2O2/B = 2, and mole ratio of Ba/B = 0.8), boron can be efficiently removed from solution by forming amorphous precipitates of barium perborate. After four hours, amorphous barium perborate was transformed to a particular species with a crystalline phase. Consequently, the boron concentration was reduced from 1000 mg/L to 2 mg/L in six hours. The results of XRD, Raman spectroscopy and ICP prove that a dinuclear perborate with double peroxo bridges constituted the crystalline precipitate whose chemical formula was found to be BaB2(O2)2 (OH)4-n (OOH)n.
AB - Among current approaches for removing boron, chemical precipitation is widely used for treating wastewater that contain a high boron concentration. The need for heating and very large amounts of coagulant limits the efficiency of this method. Accordingly, this work developed a chemical oxo-preceipitation (COP) method, which uses hydrogen peroxide (H2O2) as the oxidant and barium hydroxide (Ba(OH)2) as the precipitant to improve considerably the chemical precipitation of wastewater with a high concentration of boron at room temperature. Under suitable conditions (pHi 9, mole ratio of H2O2/B = 2, and mole ratio of Ba/B = 0.8), boron can be efficiently removed from solution by forming amorphous precipitates of barium perborate. After four hours, amorphous barium perborate was transformed to a particular species with a crystalline phase. Consequently, the boron concentration was reduced from 1000 mg/L to 2 mg/L in six hours. The results of XRD, Raman spectroscopy and ICP prove that a dinuclear perborate with double peroxo bridges constituted the crystalline precipitate whose chemical formula was found to be BaB2(O2)2 (OH)4-n (OOH)n.
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U2 - 10.1016/j.egypro.2014.11.1122
DO - 10.1016/j.egypro.2014.11.1122
M3 - Conference article
AN - SCOPUS:84922385762
SN - 1876-6102
VL - 61
SP - 349
EP - 352
JO - Energy Procedia
JF - Energy Procedia
T2 - 6th International Conference on Applied Energy, ICAE 2014
Y2 - 30 May 2014 through 2 June 2014
ER -