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首页> 外文期刊>Journal of Environmental Management >Biodegradation of methyl and butylparaben by bacterial strains isolated from amended and non-amended agricultural soil. Identification, behavior and enzyme activities of microorganisms
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Biodegradation of methyl and butylparaben by bacterial strains isolated from amended and non-amended agricultural soil. Identification, behavior and enzyme activities of microorganisms

机译：从经改良和未经改良的农业土壤中分离的细菌菌株对对羟基苯甲酸甲酯和对羟基苯甲酸丁酯的生物降解。微生物的鉴定，行为和酶活性

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摘要

The aim of the present study was to investigate the kinetics of methylparaben (MPB) and butylparaben (BPB) removal, two emerging pollutants with possible endocrine disrupting effects, from agricultural soil with and without amendment with compost from sewage sludge used as biostimulant. Compound removal is explained by a first-order kinetic model with half-life times of 6.5/6.7 days and 11.4/8.2 days, in presence/absence of compost, for MPB and BPB respectively. % R-2 for the fitted model were higher than 96% in all cases. Additionally, isolation of bacteria capable to grow using MPB or BPB as carbon source was also carry out. Laboratory tests demonstrated the ability of these bacteria to biodegrade MPB and BPB from culture media in more than 95% in some cases. These strains showed high ability to biodegrade the compounds. Ten isolates, most of them related to Gram positive bacteria of the genus Bacillus, were identified by 16S rRNA gene sequencing. The study of the enzymatic activities of the isolates revealed both esterase (C4) and esterase-lipase activities.
机译：本研究的目的是研究对土壤中的对羟基苯甲酸甲酯（MPB）和对羟基苯甲酸丁酯（BPB）的去除动力学，这两种新兴污染物具有可能的内分泌干扰作用，在经过改良和未经修正的情况下，均从农业土壤中去除了用作生物刺激剂的污泥堆肥。在有/无堆肥的情况下，MPB和BPB的半衰期分别为6.5 / 6.7天和11.4 / 8.2天的一级动力学模型解释了化合物的去除。在所有情况下，拟合模型的R-2％均高于96％。另外，还进行了使用MPB或BPB作为碳源能够生长的细菌的分离。实验室测试表明，在某些情况下，这些细菌能够从培养基中生物降解MPB和BPB的能力超过95％。这些菌株显示出高生物降解化合物的能力。通过16S rRNA基因测序鉴定了十个分离株，其中大多数与芽孢杆菌属革兰氏阳性细菌有关。对分离物的酶活性的研究揭示了酯酶（C4）和酯酶-脂肪酶的活性。

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