碩士 / 國立臺灣海洋大學 / 環境生物與漁業科學學系 / 102 / This study was to analyze the effects on adsorption when various algae concentrations of Nannochloropsis oculata (30 cells / ml and 50 cells / l) were under exposed to copper, lead , cadmium and zinc in different concentrations (3, 5 and 8 ppm). As observed in the experiment, all of the metal ions were found to have the fastest adsorption during the initial 20 minutes, reaching a saturation of 90% and gradually decreasing to almost equilibrium adsorption after 120 minutes. The adsorption of the first 20 minutes was significantly higher than the other exposure times (p <0.05).
The adsorption capacity of algae increased to 68.30, 85.44 and 106.39 mg/g, while exposed to 3, 5 and 8 ppm Cu2+ concentrations. But the absorption rate decreased to 37.32%, 29.11% and 21.76%, respectively. The adsorption capacity of algae increased to 118.64, 146.90 and 161.72 mg/g, while exposed to 3, 5 and 8 ppm Pb2+ concentrations. But the absorption rate decreased to 39.63%, 34.25% and 22.68%, respectively. The adsorption capacity of algae increased to 24.31, 28.91 and 36.71 mg/g, while exposed to 3, 5 and 8 ppm Cu2+ concentrations. But the absorption rate decreased to 14.99%, 12.57% and 5.62%, respectively. The adsorption capacity of algae increased to 7.53, 9.69 and 21.32 mg/g, while exposed to 3, 5 and 8 ppm Cu2+ concentrations. But the absorption rate decreased to 11.10%, 8.52% and 7.13%, respectively.
In different algae ambient concentration, the effect of heavy metals adsorption was significantly improved with increasing concentrations of algae (p<0.05). The metal adsorption rate of algae in ambient concentration of 50 cells/l were significantly higher than the concentration of 30 cells/l (p<0.05).
The adsorption ratio of marine algae to heavy metals in the order is Pb> Cu> Cd> Zn. The maximum adsorption for copper, cadmium and zinc were 39.63%, 37.32%, 14.99% and 11.10%, respectively. The adsorption of copper and lead were significantly higher than cadmium and zinc (p<0.05).
| Identifer | oai:union.ndltd.org:TW/102NTOU5451005 |
| Date | January 2014 |
| Creators | Chi,Yu-Pei, 陳玉佩 |
| Contributors | Cheng, Sha-Yen, 鄭學淵 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 49 |
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