[Decontamination of heavy metals in wastewater by transgenic Synechococcus sp. PCC 7002 with mouse metallothionein-I gene].
The growth characteristics and the decontamination of heavy metals in analogous heavy metals wastewater by transgenic Synechococcus sp. PCC 7002 with mouse metallothionein-I gene were studied. The results show that transgenic Synechococcus sp. PCC 7002 not only has a higher tolerance to heavy metals, but also has a higher growth rate than wild strain. The concentration of Cd2+, Pb2+ and Hg2+ decreases with the progress of cultivation, and its maximum decreasing extent occurs at 1 - 3 day. After three days of cultivation, the absorption of Cd2+, Pb2+ and Hg2+ by transgenic Synechococcus sp. PCC 7002 is 10.75, 58.89 and 112.61 mg g(-1) of dried cells respectively, which is 3.16, 2.18 and 100.45 times higher than wild cells. The mono-factor and overall model developed fit the experiment data well.
Zeng
Wen-Lu
WL
Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. zengwl2007@hotmail.com
Zhao
Fei-Fei
FF
Cao
Zhao-Gen
ZG
Ru
Bing-Gen
BG
D000222:Adaptation, Physiological / Q000187:drug effects / Q000235:genetics / Q000502:physiology; D000818:Animals; D001673:Biodegradation, Environmental; D008668:Metallothionein / Q000235:genetics / Q000502:physiology*; D019216:Metals, Heavy / Q000378:metabolism* / Q000494:pharmacology; D051379:Mice; D008822:Mice, Transgenic; D008962:Models, Theoretical; D046940:Synechococcus / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*
D019216:Metals, Heavy; D008668:Metallothionein