TY - JOUR
T1 - Removal of emerging pollutants by Ru/TiO2-catalyzed permanganate oxidation
AU - Zhang, Jing
AU - Sun, Bo
AU - Xiong, Xinmei
AU - Gao, Naiyun
AU - Song, Weihua
AU - Du, Erdeng
AU - Guan, Xiaohong
AU - Zhou, Gongming
PY - 2014/10/15
Y1 - 2014/10/15
N2 - TiO2 supported ruthenium nanoparticles, Ru/TiO2 (0.94‰ as Ru), was synthesized to catalyze permanganate oxidation for degrading emerging pollutants (EPs) with diverse organic moieties. The presence of 1.0gL-1 Ru/TiO2 increased the second order reaction rate constants of bisphenol A, diclofenac, acetaminophen, sulfamethoxazole, benzotriazole, carbamazepine, butylparaben, diclofenac, ciprofloxacin and aniline at mgL-1 level (5.0μM) by permanganate oxidation at pH 7.0 by 0.3-119 times. The second order reaction rate constants of EPs with permanganate or Ru/TiO2-catalyzed permanganate oxidation obtained at EPs concentration of mgL-1 level (5.0μM) underestimated those obtained at EPs concentration of μgL-1 level (0.050μM). Ru/TiO2-catalyzed permanganate could decompose a mixture of nine EPs at μgL-1 level efficiently and the second order rate constant for each EP was not decreased due to the competition of other EPs. The toxicity tests revealed that Ru/TiO2-catalyzed permanganate oxidation was effective not only for elimination of EPs but also for detoxification. The removal rates of sulfamethoxazole by Ru/TiO2-catalyzed permanganate oxidation in ten successive cycles remained almost constant in ultrapure water and slightly decreased in Songhua river water since the sixth run, indicating the satisfactory stability of Ru/TiO2. Ru/TiO2-catalyzed permanganate oxidation was selective and could remove selected EPs spiked in real waters more efficiently than chlorination. Therefore, Ru/TiO2-catalyzed permanganate oxidation is promising for removing EPs with electron-rich moieties.
AB - TiO2 supported ruthenium nanoparticles, Ru/TiO2 (0.94‰ as Ru), was synthesized to catalyze permanganate oxidation for degrading emerging pollutants (EPs) with diverse organic moieties. The presence of 1.0gL-1 Ru/TiO2 increased the second order reaction rate constants of bisphenol A, diclofenac, acetaminophen, sulfamethoxazole, benzotriazole, carbamazepine, butylparaben, diclofenac, ciprofloxacin and aniline at mgL-1 level (5.0μM) by permanganate oxidation at pH 7.0 by 0.3-119 times. The second order reaction rate constants of EPs with permanganate or Ru/TiO2-catalyzed permanganate oxidation obtained at EPs concentration of mgL-1 level (5.0μM) underestimated those obtained at EPs concentration of μgL-1 level (0.050μM). Ru/TiO2-catalyzed permanganate could decompose a mixture of nine EPs at μgL-1 level efficiently and the second order rate constant for each EP was not decreased due to the competition of other EPs. The toxicity tests revealed that Ru/TiO2-catalyzed permanganate oxidation was effective not only for elimination of EPs but also for detoxification. The removal rates of sulfamethoxazole by Ru/TiO2-catalyzed permanganate oxidation in ten successive cycles remained almost constant in ultrapure water and slightly decreased in Songhua river water since the sixth run, indicating the satisfactory stability of Ru/TiO2. Ru/TiO2-catalyzed permanganate oxidation was selective and could remove selected EPs spiked in real waters more efficiently than chlorination. Therefore, Ru/TiO2-catalyzed permanganate oxidation is promising for removing EPs with electron-rich moieties.
KW - Competitive oxidation
KW - Electron-rich organic moiety
KW - Endocrine disrupting chemicals
KW - Pharmaceuticals
UR - https://www.scopus.com/pages/publications/84904045146
U2 - 10.1016/j.watres.2014.06.028
DO - 10.1016/j.watres.2014.06.028
M3 - 文章
C2 - 25016299
AN - SCOPUS:84904045146
SN - 0043-1354
VL - 63
SP - 262
EP - 270
JO - Water Research
JF - Water Research
ER -