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Zinc and copper supplements enhance trichloroethylene removal by Pseudomonas plecoglossicida in water
Source PublicationEnvironmental Technology

The effects (stimulatory/inhibitory) of two representative microelements, zinc and copper, on the aerobic co-metabolic removal of trichloroethylene (10 mg/L) by the indigenous isolate Pseudomonas plecoglossicida were investigated. The strain was previously isolated from a petroleum contaminated site using toluene (150 mg/L) as growth substrate. Different concentrations (1, 10, and 100 mg/L) of microelements provided with SO42- and Cl- as the anions 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 higher concentrations (10 and 100 mg/L). 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 3 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 3 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 great potential of supplementing low concentrations of zinc and copper to enhance bioremediation of the sites co-contaminated with toluene and trichloroethylene.

KeywordZinc Copper Toluene Trichloroethylene Pseudomonas Plecoglossicida Co-metabolism
URLView the original
Indexed BySCIE
Funding ProjectSimultaneous wastewater treatment and biodiesel production using airlift bioreactor containing oleaginous microorganisms – Effects of operational parameters and microelements
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000790678000001
Scopus ID2-s2.0-85132679411
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Affiliation1.Lan Qiu
2.Keng Seng Lok
3.Qihong Lu
4.Hua Zhong
5.Xiaoyuan Guo
6.Hojae Shim
Recommended Citation
GB/T 7714
HOJAE SHIM. Zinc and copper supplements enhance trichloroethylene removal by Pseudomonas plecoglossicida in water[J]. Environmental Technology,2022.
APA HOJAE SHIM.(2022).Zinc and copper supplements enhance trichloroethylene removal by Pseudomonas plecoglossicida in water.Environmental Technology.
MLA HOJAE SHIM."Zinc and copper supplements enhance trichloroethylene removal by Pseudomonas plecoglossicida in water".Environmental Technology (2022).
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