As an environment science, the life cycle impact assessment (LCIA) is important to resolve potential issues in order to establish a safe and sustainable society without damaging either humans and the ecosystem. Although a larger volume of agricultural adjuvants has been used in the application of agrochemicals to improve performance of the pesticides the precise scientific knowledge of their environmental fate has been insufficient yet. Therefore, our research has focused on the bacterial biodegradation of adjuvants, in particular, alkylphenol polyethoxylates (APEOn) to reveal their underlying mechanism in detail. However, the degradation process of alkylphenol polypropoxylates (APPOn) is still remained unclear in the environment.This study showed that harmless APPOn is biotransformed to the endocrine active metabolic toxicants, octylphenol via the central-scission of the phenoxy bond, with the linear increment of 4. 7 ppm/day after one day incubation (y = 4.7 x � 1: r2 = 0.890). The bacterium was identified as Novosphingobium subterraneum by both of conventional 16S rRNA and the novel method, S10-GERMS method using MALDI-TOF MS analysis of the selected ribosomal proteins encoded in S10-spc-alpha operon.The novel findings of this study cover major environmental issues regarding the problems associated with adjuvants in bioaccumulation, human health impacts via safety of groundwater and drinking water. and effects on biota in the aquatic environment.

Novel biodegradation mechanism of alkylphenol polypropoxylates and identification of their biodegradate by S10-GERMS method

248th National Meeting (2014)

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