Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
Department of Development Biology Sciences, School of Life Science, Lanzhou University, Tianshuinanlu #222, Lanzhou, Gansu 730000, PR China.
Bioresour Technol. 2016 May;207:370-8. doi: 10.1016/j.biortech.2016.02.015. Epub 2016 Feb 11.
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.
多环芳烃（PAHs）和重金属等复合污染物已被确定为有毒且难以处理的污染物。在这项工作中，从石化公司废水排放口分离出的假单胞菌 LZ-E 能够同时降解萘和还原 Cr(VI)。当 LZ-E 菌株在 BH 培养基中孵育 48 小时时，10mgL(-1)Cr(VI) 中有 95%被还原为 Cr(III)，而 800mgL(-1)萘中有 77%被降解。此外，萘降解产生的儿茶酚和邻苯二甲酸能够促进 LZ-E 菌株中的 Cr(VI)还原。建立了一个充气生物反应器系统来测试 LZ-E 菌株的修复能力。在 16 天的 8 个批次中，LZ-E 菌株以 15mgL(-1)h(-1)的速率连续去除 800mgL(-1)萘和 10mgL(-1)Cr(VI)添加物中的萘和 Cr(VI)，去除速率分别为 15mgL(-1)h(-1)和 0.20mgL(-1)h(-1)。总之，LZ-E 菌株是一种潜在的联合污染修复应用菌。
