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Toxicity, Biodegradation, and Metabolic Fate of Organophosphorus Pesticide Trichlorfon on the Freshwater Algae Chlamydomonas reinhardtii.
Journal of Agricultural and Food Chemistry ( IF 6.1 ) Pub Date : 2020-01-30 , DOI: 10.1021/acs.jafc.9b05765
Liang Wan 1 , Yixiao Wu 1 , Huijun Ding 2 , Weihao Zhang 3
Affiliation  

This study investigated the toxicity of trichlorfon (TCF) to the freshwater algae Chlamydomonas reinhardtii, as well as its biodegradation and metabolic fate. The growth of C. reinhardtii decreased with increasing TCF concentration, and the maximum inhibition ratio was 51.3% at 200 mg L-1 TCF compared to the control. Analyses of pigment content, chlorophyll fluorescence, and antioxidant enzymes indicated that C. reinhardtii can produce resistance and acclimatize to the presence of TCF. The variations in pH during cultivation suggested that photosynthetic microalgae have innate advantages over bacteria and fungi in remediating TCF. A 100% biodegradation rate was achieved at a maximum concentration of 100 mg L-1 TCF. Ten metabolites were identified by GC-MS, and the degradation pathways of TCF by the algae were proposed. This research demonstrated that C. reinhardtii is highly tolerant to and can efficiently degrade TCF. Thus, C. reinhardtii can be used to remove traces of TCF from natural water environments and to treat TCF-contaminated wastewater.

中文翻译:

有机磷农药敌百虫对淡水藻类衣藻衣藻的毒性,生物降解和代谢命运。

这项研究调查了敌百虫(TCF)对淡水藻类衣藻(Chlamydomonas reinhardtii)的毒性,以及其生物降解和代谢命运。Reinhardtii的生长随TCF浓度的增加而降低,与对照相比,在200 mg L-1 TCF时,最大抑制率为51.3%。对色素含量,叶绿素荧光和抗氧化酶的分析表明,莱茵衣藻可产生抗性并适应TCF的存在。培养期间pH的变化表明,光合作用微藻在修复TCF方面具有优于细菌和真菌的先天优势。在最大浓度为100 mg L-1 TCF时,生物降解率达到100%。通过GC-MS鉴定了10种代谢物,并提出了藻类降解TCF的途径。这项研究表明,莱茵衣藻对TCF具有高度的耐受性,并且可以有效降解TCF。因此,莱茵衣藻可用于从天然水环境中去除痕量的三氯甲烷,并处理被三氯甲烷污染的废水。
更新日期:2020-01-31
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