Degradation characteristics and metabolic pathway of 17α-ethynylestradiol by Sphingobacterium sp. JCR5

Ren, Haiyan; Ji, Shulan; Ahmad, Naeem ud din; Wang, Dao; Chengwu, Cui

doi:10.1016/j.chemosphere.2006.04.064

Cited by 138 publications

(71 citation statements)

References 14 publications

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“…Strain C-2 and C-3 showed a rather steady equilibrium after 48 hours. This is in agreement with Ren et al [8] which showed a lag phase of about two days in EE2 degradation. The reason for this lag is that bacteria require time to adapt and grow in the medium when inoculated into fresh medium.…”

Section: Degradation Of Ee2supporting

confidence: 93%

“…Thus, many research works have been conducted to develop more efficient microbial degradation techniques. However, up to now, only a small number of EE2-degrading microbes were found [8]. Hence, to reduce the potential risk posed by EDCs in treated wastewater which is to be discharged to aquatic environments, their removal is significantly important.…”

Section: Introduction According To the United States (Us) Environmmentioning

confidence: 99%

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Isolation and Identification of 17α- Ethinylestradiol — Degrading Bacterial Strains from POME and Cow Dung

Lim¹,

Morad²,

Lalung³

et al. 2016

IJESD

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Abstract-Theisolation of 17α-Ethinylestradiol (EE2)-degrading bacterial strains was done using samples sourced from Palm Oil Mill Effluent (POME) and fresh cow dung. Screening processes were conducted to identify the potential strains. The three highest potential EE2-degrading bacterial strains obtained from each sample source were selected for further batch experiments. A batch study with the strains fed with only salt medium containing EE2 as the sole carbon source was conducted for 9 days. The bacterial strain isolated from POME that was capable of degrading EE2 of up to 64.0 % at EE2 concentration of 5 mg/L was identified as Hyphomicrobium facile. The strain isolated from the cow faeces that was capable of degrading EE2 up to 55.1 % at concentration of 10 mg/L was identified as Enterobacter cloacae.Index Terms-17α-ethinylestradiol, cow dung, Enterobacter cloacae, Hyphomicrobium facile, palm oil mill effluent.

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Section: Degradation Of Ee2supporting

confidence: 93%

Section: Introduction According To the United States (Us) Environmmentioning

confidence: 99%

Isolation and Identification of 17α- Ethinylestradiol — Degrading Bacterial Strains from POME and Cow Dung

Lim¹,

Morad²,

Lalung³

et al. 2016

IJESD

View full text Add to dashboard Cite

show abstract

“…During the AS process, nitrifying biomass was shown to be responsible for EE2 degradation [36,48,[93][94][95][96]. Nitrification reaction is divided into two steps, the ammonia conversion to nitrite and the subsequent oxidation to nitrate.…”

Section: Ee2 Removal During the Activated Sludge Processmentioning

confidence: 99%

17α‐Ethinylestradiol: An endocrine disrupter of great concern. Analytical methods and removal processes applied to water purification. A review

et al. 2008

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The xenobiotic 17α‐ethinylestradiol, an oral contraceptive component, is an endocrine disrupter (EDC) of great concern, with fish feminization induced for concentrations as low as ng L−1. EE2 occurrence in the aquatic environment can be linked to insufficient removal in wastewater treatment plants. The focus of this review is to consider optimum treatment processes for removal of EE2. The main problem of EE2 is concentrations often below authors' limits of detection. Consequently, it is important to fully understand the advantages and disadvantages of different analytical techniques as this will determine confidence in comparison of the efficiency of different treatment processes. Solid‐phase extraction followed by chromatography is widely used but alternative methods, such as solid‐phase microextraction, stir bar sorptive extraction, or passive samplers, appear as promising tools. During the conventional activated sludge (AS) process, the incomplete sludge settlement results in lost of biomass, which means loss of EE2 adsorbed, and in low SRT, unsuited to nitrifying microorganisms that are responsible for EE2 biodegradation. Among bioprocesses, i.e., AS, membrane bioreactors (MBRs), biofilm reactors, and sequencing batch reactors, MBR technology appears as a hopeful solution for the improvement of EDCs removal, and, more precisely, EE2. Alternative treatments such as photodegradation, granulated activated carbon, MnO2, and sand reactor or ozonation were tested in the laboratory and were shown to be inadequate. © 2008 American Institute of Chemical Engineers Environ Prog, 2008

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“…Although these estrogen metabolites are deconjugated by bacteria present in sewage and mixed liquor (Shi et al, 2004;Czajka and Londry, 2006), the deconjugated steroids are however, detected in the effluent at concentrations close to the total expected based on excretion values (Johnson et al, 2000). EE2 has the highest endocrine disrupting potency; it is found at low concentrations and is also recalcitrant to biodegradation (Esperanza et al, 2007;Haiyan et al, 2007;Hashimoto et al, 2007). NP is a transformation product of nonylphenol ethoxylates (NPnEOs) which is used in many industrial and commercial process including textile industry processes, and in cosmetic and detergent manufacture (Birket and Lester, 2003;Chien and Shih, 2007).…”

Section: Introductionmentioning

confidence: 99%

The fate and behavior of selected endocrine disrupting chemicals in full scale wastewater and sludge treatment unit processes

Ifelebuegu

2011

Int. J. Environ. Sci. Technol.

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AB STRACT: Endocrine disrupting chemicals are discharged into the environment mainly through wastewater treatment processes. There is a need for better understanding of the fate of these compounds in the unit processes of treatment plant to optimise their removal. The fate of oestrone, 17β-estradiol, 17α-ethinyestradiol and nonylphenol in the unit processes of full scale wastewater treatment plants in the UK, including activated sludge plant, oxidation ditch, biofilter and rotating biological contactor were investigated. The overall removal efficiencies of all the compounds ranged from 41 % to 100 %. The removals were predominantly during the secondary biological treatment with the rates of removal related to the nitrification rates and the sludge age. The removal efficiency of the treatment processes were in the order activated sludge > oxidation ditch > biofilter > rotating biological contactors. Activated sludge plant configured for biological nutrient removal showed better removal of the endocrine disrupting chemicals compared to conventional activated sludge plant effluents. Tertiary treatment was also significant in the removal process through solids removal. Overall mechanisms of removal were biodegradation and sorption unto sludge biomass. Phytoremediation was also significant in the removal processes. The endocrine disrupting chemicals persisted in the anaerobic sludge digestion process with percentage removals ranging fro 10-48 %. Sorption of the endocrine disrupting chemicals onto the sludge increased with increasing values for the partitioning coefficients and the organic carbon contents of the sludge.

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Degradation characteristics and metabolic pathway of 17α-ethynylestradiol by Sphingobacterium sp. JCR5

Cited by 138 publications

References 14 publications

Isolation and Identification of 17α- Ethinylestradiol — Degrading Bacterial Strains from POME and Cow Dung

Isolation and Identification of 17α- Ethinylestradiol — Degrading Bacterial Strains from POME and Cow Dung

17α‐Ethinylestradiol: An endocrine disrupter of great concern. Analytical methods and removal processes applied to water purification. A review

The fate and behavior of selected endocrine disrupting chemicals in full scale wastewater and sludge treatment unit processes

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