A novel Pseudomonas gessardii strain LZ-E simultaneously degrades naphthalene and reduces hexavalent chromium

作者：Huang, Haiying; Wu, Kejia; Khan, Aman; Jiang, Yiming; Ling, Zhenmin; Liu, Pu; Chen, Yong; Tao, Xuanyu; Li, Xiangkai^*

来源：Bioresource Technology, 2016, 207: 370-378.

DOI：10.1016/j.biortech.2016.02.015

• P. gessardii LZ-E
• Naphthalene degradation
• Cr(VI) reduction
• Combined pollution remediation

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.

• 出版日期2016-5
• 单位兰州大学