Biodegradation Mechanism of Fatty Alcohol Non-Ionics.

Nooi, J. R.; Testa, M. C.; Willemse, S.

doi:10.1515/tsd-1970-070201

Cited by 15 publications

(2 citation statements)

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“…Our results showing rapid biodegradation of ethoxylate chains in Ohio River water are in agreement with results of others who have studied LAE degradation in biodegradability screening tests (5)(6)(7)(8)(9)11,12). However, they are in contrast to results of Tobin et al (13,14), who found that only 20-50%…”

Section: Resultssupporting

confidence: 92%

“…Linear alcohol ethoxylates (LAE's) are mixed-chain-length nonionic surfactants of considerable commercial importance (1). The primary biodegradability of linear alcohol ethoxylates has been well established by colorimetric techniques (2)(3)(4)(5)(6)(7). Linear alcohol ethoxylates have also been shown to undergo ultimate degradation in laboratory-scale wastewater treatment systems and in biodegradability screening studies (2,(7)(8)(9)(10).…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of linear alcohol ethoxylates in natural waters

Larson¹,

Games²

1981

Environ. Sci. Technol.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Biodegradation of linear alcohol ethoxylates in natural waters

Larson¹,

Games²

1981

Environ. Sci. Technol.

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Investigation of aerobic degradation kinetics of surfactants using respirometric batch experiments

Schreiner¹,

Asmussen²,

Wiesmann³

et al. 1999

Acta Biotechnologica

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The mineralization of a non-ionic alcohol ethoxylate (AEO) surfactant was investigated over the concentration range occurring in rinsing water from surfactant production processes. For this, an experimental set-up for respirometric batch experiments was developed. The set-up and the method were validated by experiments with glucose as the single carbon source. It was possible to calculate substrate decay from the time course of exogenously consumed oxygen during respirometric batch experiments. The kinetic coefficients calculated by respirometry showed a lower standard deviation than those calculated from measured glucose concentrations.The degradation mechanism of AEO was investigated by identification of metabolites, occurring during the mineralization process of AEO, using Flow Injection Mass spectrometry (FI-MS). It was concluded that the degradation of AEO occurs in two main steps. First, the enzymatic hydrolysis of AEO into alcohol and polyethylene glycol (PEG) is performed. Second, the mineralization of both substances takes place, while the mineralization of the alcohol is faster than that of the PEG. The mineralization kinetics were investigated in respirometric batch experiments. The model used is based on double MONOD kinetics for the substrates being produced by hydrolysis (pm,, = 0.047 h -1, Ksl = 15 mg/l DOC for alcohol; pmax2 = 0.027 h -I, Ks2 = 4 m d l DOC for PEG). The validation of the model by calculating the results obtained from measurements in a continuously operated lab scale CSTR with bacteria recycle was successful.

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Specific ¹⁴c‐labeled surfactants. The addition of homogeneous polyoxyethylene glycols to 2,6,8‐trimethyl‐4‐nonanol

Tanaka

Wien

Stolzenberg

1976

Labelled Comp Radiopharmac

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SUMWRYTwo molecularly homogeneous n o n i o n i c d e t e r g e n t s w i t h s p e c i f i c -1 4 C l a b e l i n g were prepared. Polyoxyethylene g l y c o l s of s i x and nine e t h y l e n e oxide units were coupled t o 2,6,8-trimethy1-4-nonanol (TFNOH). The r a d i o a c t i v e l a b e l was i n t h e f i r s t e t h y l e n e o x i d e u n i t a t t a c h e d t o the a l k y l moiety, TMNOCH2*CH2 (OCHzCHz),OH. A l l r e a c t i o n s employed i n t h i s s y n t h e s i s gave good t o e x c e l l e n t r e s u l t s . Two r o u t e s were developed f o r t h e r e d u c t i o n of a n a l k o x y a c e t i c a c i d i n t e r m e d i a t e t o t h e corresponding a l c o h o l , and b o t h methods gave e x c e l l e n t y i e l d s . The o v e r a l l y i e l d s f o r TMN (OCH2CH2) 60H and TIN (OCH2CH-2) gOH were 42 and 33 p e r cent, r e s p e c t i v e l y .

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Biodegradation Mechanism of Fatty Alcohol Non-Ionics.

Cited by 15 publications

References 0 publications

Biodegradation of linear alcohol ethoxylates in natural waters

Biodegradation of linear alcohol ethoxylates in natural waters

Investigation of aerobic degradation kinetics of surfactants using respirometric batch experiments

Specific ¹⁴c‐labeled surfactants. The addition of homogeneous polyoxyethylene glycols to 2,6,8‐trimethyl‐4‐nonanol

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Biodegradation Mechanism of Fatty Alcohol Non-Ionics.

Cited by 15 publications

References 0 publications

Biodegradation of linear alcohol ethoxylates in natural waters

Biodegradation of linear alcohol ethoxylates in natural waters

Investigation of aerobic degradation kinetics of surfactants using respirometric batch experiments

Specific 14c‐labeled surfactants. The addition of homogeneous polyoxyethylene glycols to 2,6,8‐trimethyl‐4‐nonanol

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Specific ¹⁴c‐labeled surfactants. The addition of homogeneous polyoxyethylene glycols to 2,6,8‐trimethyl‐4‐nonanol