Degradation of Hydrocarbons and Heavy Metal Reduction by Marine Bacteria in Highly Contaminated Sediments.
Degradation of Hydrocarbons and Heavy Metal Reduction by Marine Bacteria in Highly Contaminated Sediments.
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DOI：
10.3390/microorganisms8091402
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发表时间：
2020-09-11
期刊：
影响因子：
4.5
通讯作者：
Sansone C
中科院分区：
文献类型：
--
作者：
Dell'Anno F;Brunet C;van Zyl LJ;Trindade M;Golyshin PN;Dell'Anno A;Ianora A;Sansone C
研究细菌对沉积物中碳氢化合物的去除和降低重金属毒性的能力对于设计更有效的生物修复策略是必要的。本研究共分离到五株细菌：盐单胞菌(Halomonas sp.)SZN1，链格孢霉Alcanivorax sp.SZN 2，假交替单胞菌SZN 2。SZN3、表杆菌属(Epi杆菌sp.)SZN4、维吉杆菌属(Virgibacillussp.)从地中海那不勒斯湾一个废弃工业区的污染沉积物中分离出SZN7，并对从同一地点采集的沉积物样本进行了生物修复效率测试。这些细菌以组合或单独培养的形式添加到受污染的沉积物中，以评估多环芳烃的生物降解效率和重金属的固定能力。结果表明，这些细菌对多环芳烃有较好的去除效果，对二苯并菲的去除效率可达80%左右。此外，这些细菌通过促进砷、铅和镉分配为流动性较低和生物可利用的部分，降低了砷、铅和镉的流动性。与纯菌株相比，微生物联合体对污染物表现出更高的性能，这表明潜在的协同作用能够提高生物修复能力。总体而言，我们的发现表明，高污染的沉积物选择了能够有效降低危险化合物毒性的细菌，为扩大生物修复试验铺平了道路。
Investigations on the ability of bacteria to enhance removal of hydrocarbons and reduce heavy metal toxicity in sediments are necessary to design more effective bioremediation strategies. In this study, five bacterial strains, Halomonas sp. SZN1, Alcanivorax sp. SZN2, Pseudoalteromonas sp. SZN3, Epibacterium sp. SZN4, and Virgibacillus sp. SZN7, were isolated from polluted sediments from an abandoned industrial site in the Gulf of Naples, Mediterranean Sea, and tested for their bioremediation efficiency on sediment samples collected from the same site. These bacteria were added as consortia or as individual cultures into polluted sediments to assess biodegradation efficiency of polycyclic aromatic hydrocarbons and heavy metal immobilisation capacity. Our results indicate that these bacteria were able to remove polycyclic aromatic hydrocarbons, with a removal rate up to ca. 80% for dibenzo-anthracene. In addition, these bacteria reduced arsenic, lead, and cadmium mobility by promoting their partitioning into less mobile and bioavailable fractions. Microbial consortia generally showed higher performance toward pollutants as compared with pure isolates, suggesting potential synergistic interactions able to enhance bioremediation capacity. Overall, our findings suggest that highly polluted sediments select for bacteria efficient at reducing the toxicity of hazardous compounds, paving the way for scaled-up bioremediation trials.
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影响因子：
5.2
作者：
Al-Kindi S;Abed RM
通讯作者：
Abed RM
影响因子：
9.8
作者：
Bertocci, I.;Dell'Anno, A.;Danovaro, R.
通讯作者：
Danovaro, R.
影响因子：
4.2
作者：
Albanese, Stefano;Iavazzo, Pietro;De Vivo, Benedetto
通讯作者：
De Vivo, Benedetto
影响因子：
5.1
作者：
Hedlund, BP;Staley, JT
通讯作者：
Staley, JT
影响因子：
5
作者：
Iohara, K;Iiyama, R;Furukawa, K
通讯作者：
Furukawa, K