研究论文
马梅,王子健,黄圣彪,朱望钊.EDTA和腐殖酸对铜在淡水藻(Scenedesmus subspicatus 86.81 SAG)细胞内外分布的影响[J].环境科学学报,2003,23(2):239-245
EDTA和腐殖酸对铜在淡水藻(Scenedesmus subspicatus 86.81 SAG)细胞内外分布的影响
- Influences of EDTA and fulvic acid on distribution of copper in fresh water alga (Scenedesmus subspicatus 86.81 SAG)
- 基金项目：国家自然科学基金(40071073);国际铜业协会(TPT)
- 作者
- 单位
- 马梅
- 中国科学院生态环境研究中心环境水质学国家重点实验室,北京 100085
- 王子健
- 中国科学院生态环境研究中心环境水质学国家重点实验室,北京 100085
- 黄圣彪
- 中国科学院生态环境研究中心环境水质学国家重点实验室,北京 100085
- 朱望钊
- 荷兰Delft大学过程工程与设备研究所,荷兰Delft
- 摘要：讨论了铜在淡水藻(Scenedesmussubspicatus86.81SAG)细胞壁和细胞内分布规律,以及乙二胺四乙酸(EDTA)和水体腐殖酸(FA)存在下对铜分布的影响.研究结果表明,EDTA和FA的存在显著降低了细胞表面铜的吸附量,但是不影响细胞内铜的浓度.对测定数据进行分析,可以认为溶液相铜与EDTA或FA形成的铜络合物是生物无效形态,不参与铜在藻细胞壁上特定位点或生物配体的竞争结合反应.
- Abstract：Distribution of copper among intracellular and extracellular of alga and influences of EDTA and fulvic acid (FA) were discussed. The results showed that the adsorption of copper on alga cell wall was significantly reduced in the presence of EDTA and FA, due to aqueous complexation. However, intracellular concentration of copper was not affected by increasing copper concentration. By analyzing the data, it was concluded that EDTA-Cu or FA-Cu complexes are not bioavailable forms in competition for the active sites, or biotic ligands, at alga cell wall.
- Key words：copper speciation toxicity alga cell
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