TY - JOUR
T1 - Peroxymonosulfate/base process in saline wastewater treatment
T2 - The fight between alkalinity and chloride ions
AU - Yang, Fei
AU - Huang, Ying
AU - Fang, Changling
AU - Xue, Ying
AU - Ai, Luoyan
AU - Liu, Jianshe
AU - Wang, Zhaohui
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/5
Y1 - 2018/5
N2 - Both Cl− and base can affect PMS activation to produce reactive chlorine or oxygen species, but the overall effects of chloride on this emerging PMS/base technology in saline wastewater treatment are unknown. Here effectiveness of PMS/base, PMS/Cl− and PMS/base/Cl− is compared with a gradient concentration of chloride and alkalinity, by probing the degradation of methylene blue (MB). Both PMS/base and PMS/Cl− systems can rapidly degrade MB due to the generation of singlet oxygen and reactive chlorine, respectively. Interestingly, dye degradation and adsorbable organic halides (AOX) formation are inhibited in the PMS/base/Cl− system as high concentrations of Cl− and base co-exist. Reaction of PMS with chloride diminishes the effective concentration of PMS by base activation, whereas in return high alkalinity decreases the oxidation capacity of reactive species. Therefore, this finding may have significant technical implications for evaluating the applicability of the emerging PMS/base technology and optimizing the conditions for AOX abatement in PMS-based processes.
AB - Both Cl− and base can affect PMS activation to produce reactive chlorine or oxygen species, but the overall effects of chloride on this emerging PMS/base technology in saline wastewater treatment are unknown. Here effectiveness of PMS/base, PMS/Cl− and PMS/base/Cl− is compared with a gradient concentration of chloride and alkalinity, by probing the degradation of methylene blue (MB). Both PMS/base and PMS/Cl− systems can rapidly degrade MB due to the generation of singlet oxygen and reactive chlorine, respectively. Interestingly, dye degradation and adsorbable organic halides (AOX) formation are inhibited in the PMS/base/Cl− system as high concentrations of Cl− and base co-exist. Reaction of PMS with chloride diminishes the effective concentration of PMS by base activation, whereas in return high alkalinity decreases the oxidation capacity of reactive species. Therefore, this finding may have significant technical implications for evaluating the applicability of the emerging PMS/base technology and optimizing the conditions for AOX abatement in PMS-based processes.
KW - Adsorbable organic halides
KW - Chloride
KW - Peroxymonosulfate
KW - Reactive chlorine species
KW - Singlet oxygen
UR - https://www.scopus.com/pages/publications/85041502259
U2 - 10.1016/j.chemosphere.2018.02.023
DO - 10.1016/j.chemosphere.2018.02.023
M3 - 文章
C2 - 29433031
AN - SCOPUS:85041502259
SN - 0045-6535
VL - 199
SP - 84
EP - 88
JO - Chemosphere
JF - Chemosphere
ER -
