Zinc and copper supplements enhance trichloroethylene removal by Pseudomonas plecoglossicida in water.
In: Environmental Technology, Jg. 44 (2023-10-01), Heft 24, S. 3698-3709
academicJournal
Zugriff:
The effects of two microelements, zinc and copper, on the aerobic co-metabolic removal of trichloroethylene (10 mg/L) by the isolate Pseudomonas plecoglossicida were investigated. The strain was previously isolated from a petroleum-contaminated site using toluene (150 mg/L) as substrate. Different concentrations (1, 10 and 100 mg/L) of microelements provided with SO42− and Cl− were tested. The results showed the supplement of Zn2+ and Cu2+ at the low concentration (1 mg/L) significantly enhanced cell growth. The removal efficiencies for toluene and trichloroethylene were also enhanced at the low concentration (1 mg/L) of Zn2+ and Cu2+. Compared to the control without zinc supplement, higher concentrations of zinc (10 and 100 mg/L) enhanced the removal efficiencies for both toluene and trichloroethylene in the first three days but showed some inhibitory effect afterward. However, the higher concentrations of Cu2+ (10 and 100 mg/L) always showed inhibitory to the toluene removal while showing inhibitory to the TCE removal after three days. For both Zn2+ and Cu2+, the anions SO42− and Cl− did not show significant difference in their effects on the toluene removal. A possible mechanism for Zn2+ and Cu2+ to enhance the removal of toluene and trichloroethylene would be their involvement in toluene oxygenase-based transformation processes. In addition, high concentrations of Zn2+ and Cu2+ ions could be removed from the liquid by the cells accordingly. The results imply a potential of supplementing low concentrations of zinc and copper to enhance bioremediation of the sites co-contaminated with toluene and trichloroethylene. [ABSTRACT FROM AUTHOR]
Titel: |
Zinc and copper supplements enhance trichloroethylene removal by Pseudomonas plecoglossicida in water.
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Autor/in / Beteiligte Person: | Qiu, Lan ; Lok, Keng Seng ; Lu, Qihong ; Zhong, Hua ; Guo, Xiaoyuan ; Shim, Hojae |
Zeitschrift: | Environmental Technology, Jg. 44 (2023-10-01), Heft 24, S. 3698-3709 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 0959-3330 (print) |
DOI: | 10.1080/09593330.2022.2069518 |
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