A novel Pseudomonas gessardii strain LZ-E simultaneously degrades naphthalene and reduces hexavalent chromium
A novel Pseudomonas gessardii strain LZ-E simultaneously degrades naphthalene and reduces hexavalent chromium
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一种新型格萨尔假单胞菌菌株 LZ-E 同时降解萘和还原六价铬
DOI：
10.1016/j.biortech.2016.02.015
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发表时间：
2016-05-01
影响因子：
11.4
通讯作者：
Li, Xiangkai
中科院分区：
文献类型：
--
作者：
Huang, Haiying;Wu, Kejia;Li, Xiangkai
含多环芳烃（PAHs）和重金属的复合污染物已被确定为有毒和难以管理的污染物。本研究从某石化企业废水排放现场分离得到的格氏假单胞菌LZ-E菌株，在降解萘的同时还能降低Cr（VI）。菌株LZ-E在BH培养基中培养48 h， 10 mg L (1) Cr（VI）的降解率为95%，800 mg L(1)萘的降解率为77%。此外，萘促进菌株LZ-E对Cr（VI）的还原，因为萘降解过程中产生的儿茶酚和邻苯二甲酸能够非生物还原Cr（VI）。建立曝气生物反应器系统，测试菌株LZ-E的修复能力。菌株LZ-E在添加800 mg L(1)萘和10 mg L (1) Cr（VI）时，以15 mg L （1 h 1）和0.20 mg L (1) h(1)的速率连续8批修复萘和Cr(VI), 16 d。综上所述，菌株LZ-E是一种潜在的污染联合修复应用。(C) 2016年作者。Elsevier Ltd.出版。这是一篇基于CC-BY-NC-ND许可（http://creativecommons.orgilicensesiby-nc-nd/4.0/）的开放获取文章。
Combined pollutants with polycyclic aromatic hydrocarbons (PAHs) and heavy metals have been identified as toxic and unmanageable contaminates. In this work, Pseudomonas gessardii strain LZ-E isolated from wastewater discharge site of a petrochemical company degrades naphthalene and reduces Cr(VI) simultaneously. 95% of 10 mg L (1) Cr(VI) was reduced to Cr(III) while 77% of 800 mg L (1) naphthalene was degraded when strain LZ-E was incubated in BH medium for 48 h. Furthermore, naphthalene promotes Cr(VI) reduction in strain LZ-E as catechol and phthalic acid produced in naphthalene degradation are able to reduce Cr(VI) abiotically. An aerated bioreactor system was setup to test strain LZ-E's remediation ability. Strain LZ-E continuously remediated naphthalene and Cr(VI) at rates of 15 mg L 1 h 1 and 0.20 mg L (1) h (1) of 800 mg L (1) naphthalene and 10 mg L (1) Cr(VI) addition with eight batches in 16 days. In summary, strain LZ-E is a potential applicant for combined pollution remediation. (C) 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC-BY-NC-ND license (http://creativecommons.orgilicensesiby-nc-nd/4.0/).