DOI: 10.1016/j.watres.2018.11.086
Scopus记录号: 2-s2.0-85059043274
论文题名: MP-UV/CaO 2 as a pretreatment method for the removal of carbamazepine and primidone in waste activated sludge and improving the solubilization of sludge
作者: Zheng M. ; Li Y. ; Ping Q. ; Wang L.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 158
结束页码: 169
语种: 英语
英文关键词: Carbamazepine (CBZ) and primidone (PMD)
; Degradation pathway
; MP-UV/CaO 2 pretreatment
; Sludge solubilization
; Waste activated sludge (WAS)
Scopus关键词: Activated sludge process
; Amides
; Chemical oxygen demand
; Degradation
; Hydrated lime
; Irradiation
; Photodegradation
; Photolysis
; Ultraviolet radiation
; Degradation pathways
; Pre-Treatment
; Primidone
; Sludge solubilization
; Waste activated sludges
; Solubility
; calcium peroxide
; carbamazepine
; peroxide
; primidone
; radical
; unclassified drug
; activated sludge
; concentration (composition)
; degradation
; dose-response relationship
; oxide group
; photolysis
; pollutant removal
; reaction kinetics
; solubilization
; suspended load
; ultraviolet radiation
; wastewater treatment
; activated sludge
; analytic method
; Article
; cell structure
; chemical oxygen demand
; chemical parameters
; degradation
; electron spin resonance
; energy consumption
; kinetics
; medium pressure ultraviolet light
; photolysis
; priority journal
; reaction time
; solubilization
; steady state
; suspended particulate matter
; ultraviolet irradiation
; waste activated sludge
; waste component removal
; waste water management
英文摘要: Medium-pressure ultraviolet light (MP-UV) combined with calcium peroxide (CaO 2 ) as a pretreatment technology for removing carbamazepine (CBZ) and primidone (PMD) in waste active sludge (WAS) and improving the solubilization of sludge were investigated. CBZ and PMD were effectively removed and the removal fitted pseudo-first kinetics under MP-UV/CaO 2 treatment with R 2 > 0.97. The higher CaO 2 dosage and lower initial volatile suspended solids (VSS) concentration were conductive to the removal of CBZ and PMD. Of the CaO 2 hydrolysates, Ca(OH) 2 played a more important role than H 2 O 2 during MP-UV/CaO 2 treatment. The removal of the target compounds was attributed to direct photolysis and indirect photolysis caused by •OH, 3 DOM * , and 1 O 2 , in which •OH played a vital role with > 62.2% contribution to the overall degradation rate. A model predicting the steady concentration of •OH in WAS ([VSS] ≈ 8.6 g L −1 ) under MP-UV/CaO 2 treatment with CaO 2 dosage ranging from 0 to 0.5 g g −1 -VSS was proposed and validated. Moreover, major intermediates of CBZ and PMD were detected and the probable transformation pathways during MP-UV/CaO 2 treatment were proposed. In addition, MP-UV/CaO 2 promoted the sludge solubilization effectively. Considering both the pharmaceutical degradation and sludge solubilization, the optimum operation condition with 0.2 g-CaO 2 g −1 -VSS combined with 7 h MP-UV irradiation is recommended. Under this condition, more than 92.3% of CBZ and 90.3% of PMD were removed, and soluble chemical oxygen demand (SCOD) increased by 657% and 13.6% compared with sole 10 h CaO 2 (0.2 g g −1 -VSS) treatment and 7 h MP-UV treatment, respectively. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122059
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
Recommended Citation:
Zheng M.,Li Y.,Ping Q.,et al. MP-UV/CaO 2 as a pretreatment method for the removal of carbamazepine and primidone in waste activated sludge and improving the solubilization of sludge[J]. Water Research,2019-01-01