The respective compounds of copper, cadmium and lead, owing to their strong toxic potential, as a result of industrial effluent, have left a trail of contamination in humans and the environment. This paper aimed to st...The respective compounds of copper, cadmium and lead, owing to their strong toxic potential, as a result of industrial effluent, have left a trail of contamination in humans and the environment. This paper aimed to study the electrode position on the removal of aqueous solutions of cadmium, lead and copper, using an electrolytic cell with a metallic screen cathode of carbon steel and platinum anode. Removal efficiencies were obtained by analysis of the solutions before and after treatment, using the methodology of cathodic-stripping voltammetry with a mercury drop electrode to quantify the concentrations of Cd<sup>2+</sup>, Pb2<sup>2+</sup> and Cu<sup>2+</sup>. Removal efficiencies were obtained of 94.07% for cadmium, 94.71% for lead and 96.19% for copper, demonstrating that electrolytic removal is an effective technique for the removal of these metals from simulated industrial wastewater.展开更多
Computer assisted movement tracking was used to characterize the motility of two marine microalgae, lsochrysis galbana and Tetraselmis chui, and to investigate the toxicity of Cu, Pb, and Cd on motile percentage, curv...Computer assisted movement tracking was used to characterize the motility of two marine microalgae, lsochrysis galbana and Tetraselmis chui, and to investigate the toxicity of Cu, Pb, and Cd on motile percentage, curvilinear velocity, average path velocity, straight line velocity, linearity, straightness, and wobble. Except for motile percentage, all other motility parameters differed significantly between L galbana and T. chui. Based on relative motile percentage data, the median effective concentration (ECs0) of Cu on the motility of L galbana and T. chui was 31.4 and 1.3 gmol/L, respectively, while for Pb it was 37.8 and 10.9 ~tmol/L and for Cd it was 12 1.6 and 37.8 ~tmol/L, respectively. Compared to L galbana, T. chui was more sensitive to all tested metals. The toxic effect of the heavy metals on motility exhibited the following decreasing order for both species: Cu 〉 Pb 〉 Cd. Our results indicate that L galbana and T. chui motility is sensitive to heavy metals and can be used as an indicator for toxicology bioassays.展开更多
文摘The respective compounds of copper, cadmium and lead, owing to their strong toxic potential, as a result of industrial effluent, have left a trail of contamination in humans and the environment. This paper aimed to study the electrode position on the removal of aqueous solutions of cadmium, lead and copper, using an electrolytic cell with a metallic screen cathode of carbon steel and platinum anode. Removal efficiencies were obtained by analysis of the solutions before and after treatment, using the methodology of cathodic-stripping voltammetry with a mercury drop electrode to quantify the concentrations of Cd<sup>2+</sup>, Pb2<sup>2+</sup> and Cu<sup>2+</sup>. Removal efficiencies were obtained of 94.07% for cadmium, 94.71% for lead and 96.19% for copper, demonstrating that electrolytic removal is an effective technique for the removal of these metals from simulated industrial wastewater.
基金supported by the National Department Public Benefit Research Foundation(No. nyhyzx07-047)the Research Project of Zhejiang Education Department(No. Y200909301)and the Open Fund of Zhejiang Key Laboratory of Exploitation and Preservation of Costal Bioresources(No. J2010002)
文摘Computer assisted movement tracking was used to characterize the motility of two marine microalgae, lsochrysis galbana and Tetraselmis chui, and to investigate the toxicity of Cu, Pb, and Cd on motile percentage, curvilinear velocity, average path velocity, straight line velocity, linearity, straightness, and wobble. Except for motile percentage, all other motility parameters differed significantly between L galbana and T. chui. Based on relative motile percentage data, the median effective concentration (ECs0) of Cu on the motility of L galbana and T. chui was 31.4 and 1.3 gmol/L, respectively, while for Pb it was 37.8 and 10.9 ~tmol/L and for Cd it was 12 1.6 and 37.8 ~tmol/L, respectively. Compared to L galbana, T. chui was more sensitive to all tested metals. The toxic effect of the heavy metals on motility exhibited the following decreasing order for both species: Cu 〉 Pb 〉 Cd. Our results indicate that L galbana and T. chui motility is sensitive to heavy metals and can be used as an indicator for toxicology bioassays.