TY - JOUR
T1 - A novel chemical oxo-precipitation (COP) process for efficient remediation of boron wastewater at room temperature
AU - Shih, Yu Jen
AU - Liu, Chia Hsun
AU - Lan, Wei Cheng
AU - Huang, Yao Hui
N1 - Funding Information:
The authors would like to thank the Ministry of Science and Technology – Taiwan, for financially supporting this research under Contract No. NSC 102-2622-E-006-028-CC3 . Ted Knoy is appreciated for his editorial assistance.
PY - 2014/9
Y1 - 2014/9
N2 - Chemical oxo-precipitation (COP), which combines treatment with an oxidant and precipitation using metal salts, was developed for treating boron-containing water under milder conditions (room temperature, pH 10) than those of conventional coagulation processes. The concentration of boron compounds was 1000mg-BL-1. They included boric acid (H3BO3) and perborate (NaBO3). Precipitation using calcium chloride eliminated 80% of the boron from the perborate solution, but was unable to treat boric acid. COP uses hydrogen peroxide (H2O2) to pretreat boric acid, substantially increasing the removal of boron from boric acid solution by chemical precipitation from less than 5% to 80%. Furthermore, of alkaline earth metals, barium ions are the most efficient precipitant, and can increase the 80% boron removal to 98.5% at [H2O2]/[B] and [Ba]/[B] molar ratios of 2 and 1, respectively. The residual boron in the end water of COP contained 15ppm-B: this value cannot be achieved using conventional coagulation processes.
AB - Chemical oxo-precipitation (COP), which combines treatment with an oxidant and precipitation using metal salts, was developed for treating boron-containing water under milder conditions (room temperature, pH 10) than those of conventional coagulation processes. The concentration of boron compounds was 1000mg-BL-1. They included boric acid (H3BO3) and perborate (NaBO3). Precipitation using calcium chloride eliminated 80% of the boron from the perborate solution, but was unable to treat boric acid. COP uses hydrogen peroxide (H2O2) to pretreat boric acid, substantially increasing the removal of boron from boric acid solution by chemical precipitation from less than 5% to 80%. Furthermore, of alkaline earth metals, barium ions are the most efficient precipitant, and can increase the 80% boron removal to 98.5% at [H2O2]/[B] and [Ba]/[B] molar ratios of 2 and 1, respectively. The residual boron in the end water of COP contained 15ppm-B: this value cannot be achieved using conventional coagulation processes.
UR - http://www.scopus.com/inward/record.url?scp=84903644021&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84903644021&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2014.03.121
DO - 10.1016/j.chemosphere.2014.03.121
M3 - Article
C2 - 24997923
AN - SCOPUS:84903644021
SN - 0045-6535
VL - 111
SP - 232
EP - 237
JO - Chemosphere
JF - Chemosphere
ER -