Surfactant-enhanced Bioremediation of n-Hexadecane-contaminated Soil Using Halo-tolerant Bacteria Paenibacillus glucanolyticus sp. Strain T7-AHV Isolated from Marine Environment

IF 1.6 4区生物学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Chemical and Biochemical Engineering Quarterly Pub Date : 2019-04-10 DOI:10.15255/CABEQ.2018.1465

S. Ghafari, Zeynab Baboli, S. Jorfi, Mehrnoosh Abtahi, R. Saeedi, R. Darvishi Cheshmeh Soltani, S. A. Mirzaee, A. Neisi

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引用次数: 10

Abstract

A halo-tolerant bacterial strain Paenibacillus glucanolyticus sp. strain T7-AHV isolated from marine environment was used for bioremediation of n-hexadecane-contaminated soil. Soil/water ratio, initial inoculums volume, surfactant addition, n-hexadecane concentration, and salinity were investigated. The possibility of biosurfactant production by isolated strain was also studied, and the results demonstrated that it was not a biosurfactant producer, based on measurement of the surface tension of culture broth. Both tween 80 and rhamnolipid enhanced the biodegradation of n-hexadecane significantly up to 44 and 46 %, respectively. A biodegradation rate of 39.7 % was observed at salinity level of up to 2 %, and the biodegradation efficiency decreased significantly at higher salinity concentrations. A natural hydrocarbon-contaminated soil sample with total petroleum hydrocarbon (TPH) concentration of 1437 mg kg–1 was subjected to bioremediation using the selected conditions of operational parameters, and a biodegradation rate of 22.1 % was obtained.

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表面活性剂增强海洋耐光细菌T7-AHV对正十六烷污染土壤的生物修复

利用从海洋环境中分离到的耐光葡萄酸解芽孢杆菌T7-AHV菌株对正十六烷污染土壤进行生物修复。考察了土壤/水比、初始接种量、表面活性剂添加量、正十六烷浓度和盐度。对分离菌株生产生物表面活性剂的可能性进行了研究，通过对培养液表面张力的测定，结果表明该菌株不是生物表面活性剂的生产者。80和鼠李糖脂均能显著提高正十六烷的生物降解率，分别达到44%和46%。当盐度为2%时，生物降解率为39.7%，当盐度升高时，生物降解效率显著降低。以总石油烃(TPH)浓度为1437 mg kg-1的天然烃污染土壤样品为研究对象，在选定的操作参数条件下进行生物修复，生物降解率为22.1%。

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来源期刊

Chemical and Biochemical Engineering Quarterly 工程技术-工程：化工

CiteScore

2.70

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： The journal provides an international forum for presentation of original papers, reviews and discussions on the latest developments in chemical and biochemical engineering. The scope of the journal is wide and no limitation except relevance to chemical and biochemical engineering is required. The criteria for the acceptance of papers are originality, quality of work and clarity of style. All papers are subject to reviewing by at least two international experts (blind peer review). The language of the journal is English. Final versions of the manuscripts are subject to metric (SI units and IUPAC recommendations) and English language reviewing. Editor and Editorial board make the final decision about acceptance of a manuscript. Page charges are excluded.