TY - JOUR
T1 - Sustained oxidation of Tea-Fe(III)/H2O2 simultaneously achieves sludge reduction and carbamazepine removal
T2 - The crucial role of EPS regulation
AU - Lin, Wei
AU - Chen, Renglu
AU - Gong, Chuangxin
AU - Desmond, Peter
AU - He, Xu
AU - Nan, Jun
AU - Li, Guibai
AU - Ma, Jun
AU - Ding, An
AU - Ngo, Huu Hao
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/5/15
Y1 - 2024/5/15
N2 - Establishing an economic and sustained Fenton oxidation system to enhance sludge dewaterability and carbamazepine (CBZ) removal rate is a crucial path to simultaneously achieve sludge reduction and harmless. Leveraging the principles akin to "tea making", we harnessed tea waste to continually release tea polyphenols (TP), thus effectively maintaining high level of oxidation efficiency through the sustained Fenton reaction. The results illustrated that the incorporation of tea waste yielded more favorable outcomes in terms of water content reduction and CBZ removal compared to direct TP addition within the Fe(III)/hydrogen peroxide (H 2 O 2 ) system. Concomitantly, this process mainly generated hydroxyl radical ( center dot OH) via three oxidation pathways, effectively altering the properties of extracellular polymeric substances (EPS) and promoting the degradation of CBZ from the sludge mixture. The interval addition of Fe(III) and H 2 O 2 heightened extracellular oxidation efficacy, promoting the desorption and removal of CBZ. The degradation of EPS prompted the transformation of bound water to free water, while the formation of larger channels drove the discharge of water. This work achieved the concept of treating waste with waste through using tea waste to treat sludge, meanwhile, can provide ideas for subsequent sludge harmless disposal.
AB - Establishing an economic and sustained Fenton oxidation system to enhance sludge dewaterability and carbamazepine (CBZ) removal rate is a crucial path to simultaneously achieve sludge reduction and harmless. Leveraging the principles akin to "tea making", we harnessed tea waste to continually release tea polyphenols (TP), thus effectively maintaining high level of oxidation efficiency through the sustained Fenton reaction. The results illustrated that the incorporation of tea waste yielded more favorable outcomes in terms of water content reduction and CBZ removal compared to direct TP addition within the Fe(III)/hydrogen peroxide (H 2 O 2 ) system. Concomitantly, this process mainly generated hydroxyl radical ( center dot OH) via three oxidation pathways, effectively altering the properties of extracellular polymeric substances (EPS) and promoting the degradation of CBZ from the sludge mixture. The interval addition of Fe(III) and H 2 O 2 heightened extracellular oxidation efficacy, promoting the desorption and removal of CBZ. The degradation of EPS prompted the transformation of bound water to free water, while the formation of larger channels drove the discharge of water. This work achieved the concept of treating waste with waste through using tea waste to treat sludge, meanwhile, can provide ideas for subsequent sludge harmless disposal.
KW - Carbamazepine
KW - Extracellular polymeric substances
KW - Sludge dewaterability
KW - Tea waste
KW - Treating waste with waste
UR - http://www.scopus.com/inward/record.url?scp=85189621059&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2024.134182
DO - 10.1016/j.jhazmat.2024.134182
M3 - Article
C2 - 38583202
AN - SCOPUS:85189621059
SN - 0304-3894
VL - 470
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 134182
ER -