TY - JOUR
T1 - Solid-Liquid Distribution of Ciprofloxacin during Sludge Dewatering after Fe(II)-Activated Peroxymonosulfate Treatment
T2 - Focusing on the Role of Dissolved Organic Components
AU - Xiao, Keke
AU - Abbt-Braun, Gudrun
AU - Borowska, Ewa
AU - Thomagkini, Xanthippi
AU - Horn, Harald
N1 - Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/5/13
Y1 - 2022/5/13
N2 - The role of dissolved organic components in the solid-liquid distribution of ciprofloxacin (CIP) during sludge dewatering by Fe(II)-activated peroxymonosulfate treatment was investigated in both anaerobic digested sludge (ADS) and waste activated sludge (WAS). After treatment, CIP (15% for ADS and 27% for WAS) was partially degraded within the solid sludge phase, but a majority of CIP was still present in the solid sludge phase. The entire process led to an increase of CIP concentration within the liquid phase of both ADS and WAS, along with the increase of dissolved organic components in the liquid sludge phase. Fractionation of dissolved organic components by size exclusion chromatography coupled with online organic carbon detection showed that CIP concentration in the liquid phase was positively correlated with the high molecular fraction existed therein (assigned to biopolymers; regression coefficient = 0.99, probability <0.05). Further studies with model dissolved organic components showed that the dissolved organic components influenced the CIP presence in the liquid phase through (1) inhibiting the adsorption of CIP onto sludge flocs, as indicated by the decreased adsorption capacity at equilibrium for both ADS and WAS and (2) retarding CIP degradation in the liquid phase by Fe(II)-activated peroxymonosulfate treatment.
AB - The role of dissolved organic components in the solid-liquid distribution of ciprofloxacin (CIP) during sludge dewatering by Fe(II)-activated peroxymonosulfate treatment was investigated in both anaerobic digested sludge (ADS) and waste activated sludge (WAS). After treatment, CIP (15% for ADS and 27% for WAS) was partially degraded within the solid sludge phase, but a majority of CIP was still present in the solid sludge phase. The entire process led to an increase of CIP concentration within the liquid phase of both ADS and WAS, along with the increase of dissolved organic components in the liquid sludge phase. Fractionation of dissolved organic components by size exclusion chromatography coupled with online organic carbon detection showed that CIP concentration in the liquid phase was positively correlated with the high molecular fraction existed therein (assigned to biopolymers; regression coefficient = 0.99, probability <0.05). Further studies with model dissolved organic components showed that the dissolved organic components influenced the CIP presence in the liquid phase through (1) inhibiting the adsorption of CIP onto sludge flocs, as indicated by the decreased adsorption capacity at equilibrium for both ADS and WAS and (2) retarding CIP degradation in the liquid phase by Fe(II)-activated peroxymonosulfate treatment.
KW - adsorption and degradation
KW - antibiotics and antibiotic resistance genes
KW - ciprofloxacin
KW - dissolved organic components
KW - sludge dewatering
UR - http://www.scopus.com/inward/record.url?scp=85134899446&partnerID=8YFLogxK
U2 - 10.1021/acsestengg.1c00402
DO - 10.1021/acsestengg.1c00402
M3 - 文章
AN - SCOPUS:85134899446
SN - 2690-0645
VL - 2
SP - 863
EP - 873
JO - ACS ES and T Engineering
JF - ACS ES and T Engineering
IS - 5
ER -