TY - JOUR
T1 - Mineralization and deflourization of 2,2,3,3-tetrafluoro-1-propanol (TFP) by UV/persulfate oxidation and sequential adsorption
AU - Shih, Yu Jen
AU - Putra, Widha Nirwana
AU - Huang, Yao Hui
AU - Tsai, Jie Cheng
N1 - Funding Information:
The authors would like to thank the National Science Council of Taiwan, for financially supporting this research under Contract No. NSC 101-2622-E-006-020-CC3. Dr. Ted Knoy is appreciated for his editorial assistance.
PY - 2012/11
Y1 - 2012/11
N2 - This work demonstrates the combination of UV/persulfate and adsorption processes for treating 2,2,3,3-tetrafluoro-1-propanol (TFP) wastewater. Under the optimum conditions, 20mM persulfate (S2O82-), 254nm UV-C, and pH 3, 99.7% of TOC removal from an initial TFP solution of 1.39mM was achieved. The photolysis of persulfate (S2O82-) by UV irradiation yielded the sulfate radical (SO4-) with high activity, which mineralized most of the TFP in 2h. The released fluoride ions were then removed by using a waste iron oxide, BT-4 adsorbent. 20gL-1 BT-4 adsorbed 95% of the fluoride that was produced by mineralization of 1.39mM TFP. The kinetics and isotherms of adsorption were examined to determine the fluoride removal efficiency of BT-4 which co-existed with the sulfate ions from the consumed sulfate radicals. Accordingly, the kinetics of adsorption was described by a pseudo-second-order rate model, while the adsorption isotherms were well fitted with the Langmuir model. BT-4 had a high adsorption capacity of 26.4mgg-1 (25°C) in removing the fluoride from TFP mineralization, suggesting that the co-existing sulfate ions never significantly affected the fluoride removal efficiency.
AB - This work demonstrates the combination of UV/persulfate and adsorption processes for treating 2,2,3,3-tetrafluoro-1-propanol (TFP) wastewater. Under the optimum conditions, 20mM persulfate (S2O82-), 254nm UV-C, and pH 3, 99.7% of TOC removal from an initial TFP solution of 1.39mM was achieved. The photolysis of persulfate (S2O82-) by UV irradiation yielded the sulfate radical (SO4-) with high activity, which mineralized most of the TFP in 2h. The released fluoride ions were then removed by using a waste iron oxide, BT-4 adsorbent. 20gL-1 BT-4 adsorbed 95% of the fluoride that was produced by mineralization of 1.39mM TFP. The kinetics and isotherms of adsorption were examined to determine the fluoride removal efficiency of BT-4 which co-existed with the sulfate ions from the consumed sulfate radicals. Accordingly, the kinetics of adsorption was described by a pseudo-second-order rate model, while the adsorption isotherms were well fitted with the Langmuir model. BT-4 had a high adsorption capacity of 26.4mgg-1 (25°C) in removing the fluoride from TFP mineralization, suggesting that the co-existing sulfate ions never significantly affected the fluoride removal efficiency.
UR - http://www.scopus.com/inward/record.url?scp=84866348035&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866348035&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2012.08.010
DO - 10.1016/j.chemosphere.2012.08.010
M3 - Article
C2 - 22947256
AN - SCOPUS:84866348035
VL - 89
SP - 1262
EP - 1266
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
IS - 10
ER -