A novel Pseudomonas gessardii strain LZ-E simultaneously degrades naphthalene and reduces hexavalent chromium. (May 2016)

• Record Type: Journal Article
• Authors: Huang, Haiying; Wu, Kejia; Khan, Aman; Jiang, Yiming; Ling, Zhenmin; Liu, Pu; Chen, Yong; Tao, Xuanyu; Li, Xiangkai
• Is Part Of: Bioresource technology. Volume 207(2016)
• Page Start: 370
• Page End: 378
• Publication Date: 2016-05
• Subjects: P. gessardii LZ-E -- Naphthalene degradation -- Cr(VI) reduction -- Combined pollution remediation; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.02.015
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Pseudomonas gessardii LZ-E degrades naphthalene and reduces Cr(VI) simultaneously. Naphthalene degradation promoted Cr(VI) reduction in strain LZ-E. Naphthalene degradation intermediates can reduce Cr(VI). Strain LZ-E was able to remediate naphthalene and Cr(VI) in an aerated bioreactor. 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 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.