Synergetic effect of bio-photocatalytic hybrid system: g-C3N4 and Acinetobacter sp JLS1 for enhanced degradation of C-16 alkane

	Synergetic effect of bio-photocatalytic hybrid system: g-C3N4 and Acinetobacter sp JLS1 for enhanced degradation of C-16 alkane
	X. J. Xu, Z. H. Zhai, H. Y. Li, Q. Y. Wang, X. R. Han and H. W. Yu
刊名	Chemical Engineering Journal
	2017
卷号	323 页码:520-529
通讯作者	于洪文
中文摘要	Petroleum hydrocarbons are ubiquitous in nature and generally lead to contamination. The aim of this study was to establish a bio-photocatalytic system using graphite-like carbon nitride (g-C3N4) and petroleum-degrading bacterium Acinetobacter sp. JLS1 and evaluate its effect on C-16 alkane degradation. The successfully synthesized g-C3N4 produced no obvious lethal effect to strain JLS1 until 1 g/L. C-16 alkane (0.25% v/v) degradation was investigated in the individual (photocatalytic or biocatalytic) and hybrid (bio-photocatalytic) systems. The C16 alkane removal efficiency of the hybrid system under visible light irradiation was 78.2% within 4 h, which was more effective than that of photocatalytic (26.8%) and biocatalytic (38.3%) systems. This positive synergetic effect between g-C3N4 and strain JLS1 was due to the photocatalytic activity of g-C3N4 for C-16 alkane degradation and increased porosity and permeability of bacterial membrane, thus facilitating the entry of targeted compound into bacterial cells. In the hybrid system, hexadecanoic acid, dodecanoic acid and octanoic acid were examined out in bacterial cells, which were biostransformed by strain JLS1 from initial C-16 alkane and its photocatalytic degradation products (alkanes with relative lower C atoms). In addition, alkB gene transcription was strongly upregulated by g-C3N4 under visible-light irradiation, however, growth of strain JLS1 slightly improved compared to that in other tested systems, suggesting that continuous attack of photocatalytic reaction constantly impeded the repair process of bacterial cell. The established effective bio-photocatalytic system not only drew a new sight for further research but also provided a promising remediation approach for dealing with petroleum hydrocarbons. (C) 2017 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.iga.ac.cn/handle/131322/7663]
专题	东北地理与农业生态研究所_湿地与全球变化学科组_期刊论文
推荐引用方式 GB/T 7714	X. J. Xu, Z. H. Zhai, H. Y. Li, Q. Y. Wang, X. R. Han and H. W. Yu. Synergetic effect of bio-photocatalytic hybrid system: g-C3N4 and Acinetobacter sp JLS1 for enhanced degradation of C-16 alkane[J]. Chemical Engineering Journal,2017,323:520-529.
APA	X. J. Xu, Z. H. Zhai, H. Y. Li, Q. Y. Wang, X. R. Han and H. W. Yu.(2017).Synergetic effect of bio-photocatalytic hybrid system: g-C3N4 and Acinetobacter sp JLS1 for enhanced degradation of C-16 alkane.Chemical Engineering Journal,323,520-529.
MLA	X. J. Xu, Z. H. Zhai, H. Y. Li, Q. Y. Wang, X. R. Han and H. W. Yu."Synergetic effect of bio-photocatalytic hybrid system: g-C3N4 and Acinetobacter sp JLS1 for enhanced degradation of C-16 alkane".Chemical Engineering Journal 323(2017):520-529.