title: A novel Pseudomonas gessardii strain LZ-E simultaneously degrades naphthalene and reduces hexavalent chromium.
abstract: 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 10mgL(-1) Cr(VI) was reduced to Cr(III) while 77% of 800mgL(-1) naphthalene was degraded when strain LZ-E was incubated in BH medium for 48h. 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 15mgL(-1)h(-1) and 0.20mgL(-1)h(-1) of 800mgL(-1) naphthalene and 10mgL(-1) Cr(VI) addition with eight batches in 16days. In summary, strain LZ-E is a potential applicant for combined pollution remediation.
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
authors.forename: Haiying
authors.initials: H
authors.lastname: Huang
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
authors.forename: Kejia
authors.initials: K
authors.lastname: Wu
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
authors.forename: Aman
authors.initials: A
authors.lastname: Khan
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
authors.forename: Yiming
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
authors.forename: Zhenmin
authors.initials: Z
authors.lastname: Ling
authors.affiliation: Department of Development Biology Sciences, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
authors.forename: Pu
authors.initials: P
authors.lastname: Liu
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
authors.forename: Xuanyu
authors.initials: X
authors.lastname: Tao
authors.affiliation: Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China. Electronic address: xkli@lzu.edu.cn.
authors.forename: Xiangkai
authors.initials: X
authors.lastname: Li
mesh_terms: D001673:Biodegradation, Environmental; D002857:Chromium / Q000378:metabolism*; D009281:Naphthalenes / Q000032:analysis / Q000378:metabolism*; D010802:Phylogeny; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000378:metabolism; D011549:Pseudomonas / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D062065:Wastewater / Q000382:microbiology
chemical_list: D002857:Chromium; D009281:Naphthalenes; D011084:Polycyclic Aromatic Hydrocarbons; D062065:Wastewater; C074702:chromium hexavalent ion; C031721:naphthalene
keywords: Combined pollution remediation; Cr(VI) reduction; Naphthalene degradation; P. gessardii LZ-E