细菌混合培养物对多氯联苯(PCBs)生物降解的修复潜力

IF 0.9 Q4 CHEMISTRY, MULTIDISCIPLINARY Acta Chimica Slovaca Pub Date : 2019-04-01 DOI:10.2478/acs-2019-0001
H. Horváthová, K. Lászlová, K. Dercová
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引用次数: 1

摘要

摘要提出了在由几个菌株组成的细菌混合培养物存在的情况下,在最低限度的矿泉水介质中修复多氯联苯(PCBs)的方法。从混合培养中菌株的特性和特征可以得到补充和补偿的事实出发,进行了二元、三元和七元混合培养(MC)。用于构建MC的菌株是从一家前PCB生产商的废水渠中分离出来的。通过以1∶3和3∶1的生物量比添加含有菌株Rhodococcus sp.和嗜麦芽窄食单胞菌的两元MC,实现了七种已定义的多氯联苯同源物之和的70%的最高生物降解。七元MC对多氯联苯的生物降解率较低(58%),但与少元混合培养物或单个菌株相比,它提供了几个好处:与天然存在的微生物群落相似,更容易制备接种物,具有一定的可重复结果。定期重新接种水介质可使多氯联苯的生物降解率提高到65%。七元MC也被应用于历史上受多氯联苯污染的沉积物,其中确定了七种多氯联苯同源物的总降解率为59%。
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Remediation potential of bacterial mixed cultures for polychlorinated biphenyls (PCBs) biodegradation
Abstract Remediation of polychlorinated biphenyls (PCBs) in minimal mineral water media in the presence of bacterial mixed cultures consisting of several individual strains is proposed. Starting from the fact that the properties and features of bacterial strains in mixed cultures can be supplemented and compensated, two-, three- and seven-membered mixed cultures (MC) were performed. The strains used for the construction of the MC were isolated from the waste canal of a former PCB producer. The highest biodegradation of 70 % of the sum of seven defined PCB congeners was achieved by two-membered MC containing the strains Rhodococcus sp. and Stenotrophomonas maltophilia added in the biomass ratio of 1 : 3 and 3 : 1. PCB biodegradation by a seven-membered MC was lower (58 %) but provided several benefits over the less-membered mixed cultures or the individual strains: similarity to naturally occurring microflora, easier preparation of the inocula, certain and repeatable results. Periodical reinoculation of the water media resulted to PCB biodegradation increase to 65 %. Seven-membered MC was applied to the historically PCB contaminated sediment as well, where a 59 % degradation of the sum of seven PCB congeners was determined.
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来源期刊
Acta Chimica Slovaca
Acta Chimica Slovaca CHEMISTRY, MULTIDISCIPLINARY-
自引率
12.50%
发文量
11
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