PMID: 16612898Apr 15, 2006Paper

Toxicity of heavy metals on Scenedesmus quadricauda (Turp.) de Brébisson in batch cultures

Environmental Science and Pollution Research International
Muwafq H Mohammed, Bernd Markert

Abstract

Aquatic environments are often exposed to various pollutants like heavy metals that are released from industrial, agricultural and domestic wastes. Emissions of heavy metals can then enter all ecosystems and bring about severe problems in plants, especially algae depending on the concentrations of a given element. The objective of the investigation presented is to detect toxic effects due to some heavy metals in the biomass of green alga Scenedesmus quadricauda. All experiments were conducted with axenic cultures of the green alga Scenedesmus quadricauda (Turp.) de Brebisson (Chlorococcales, Chlorophyta). The cultures were grown in Chu-no.10 medium, and optimum physical and chemical growth conditions were provided to get higher growth rates and lower doubling times of cells. Growth of the micro algal cultures was measured on a daily schedule by counting cultures and determination of chlorophyll-a. The sterile-filtered heavy metal concentration solutions (Cd, Pb and Cu) were prepared and added as stock solutions of their salts (CdCl2*2.5 H2O, Pb(NO3)2*H2O and CuSO4*5 H2O). The growth decreased gradually with the alga exposed to Cd at 0.05, 0.1, and 0.5 mg/L in comparison with the control whereas 1 mg/L Cd2+ had a clearly destruc...Continue Reading

Citations

Jul 16, 2011·Journal of Environmental Monitoring : JEM·Jiannan CaiJiaqi Luo
Sep 29, 2009·Bulletin of Environmental Contamination and Toxicology·Antoni Murkowski, Elzbieta Skórska
Jun 6, 2009·Ecotoxicology·Jingling LiuJoseph Domagalski
May 28, 2008·Environmental Science and Pollution Research International·Peter SchröderJaco Vangronsveld

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