研究论文
刘长发,陶澍,龙爱民,曹军.金鱼(Carassius auratus)对颗粒态镉的鳃吸收[J].环境科学学报,2001,21(1):24-28
金鱼(Carassius auratus)对颗粒态镉的鳃吸收
- Uptake of particulate cadmium via gills of goldfish(Carassius auratus)
- 基金项目：国家杰出青年基金(49525102);国际铜协会环境项目[TPT0604]资助
- 作者
- 单位
- 刘长发
- 北京大学城市与环境学系,北京 100871
- 陶澍
- 北京大学城市与环境学系,北京 100871
- 龙爱民
- 北京大学城市与环境学系,北京 100871
- 曹军
- 北京大学城市与环境学系,北京 100871
- 摘要：采用水相平衡态镉浓度不变(0.01mg/L),增加水铝矿颗粒吸附态镉暴露的实验方法,研究了金鱼(Carassiusauratus)对颗粒态镉的鳃吸收.结果表明,鳃中镉含量均随颗粒态镉暴露浓度增加而增加,且镉/铝含量比明显高于水相,从而证实了颗粒态镉的鱼鳃吸收有效性.金鱼鳃吸收颗粒态镉的主要过程是:随水流流经鳃表面的颗粒态镉附着在鳃表粘液上,在鳃部微环境下,吸附的镉发生解吸而被鳃部细胞吸收.颗粒物及未被吸收的镉在鳃丝表面短暂停留后与脱落粘液一起随水流从鳃部排出.
- Abstract：The uptake of particulate cadmium via gills of goldfish, Carassius auratuswas observed by exposure to a mixture of constant soluble cadmium (0.01mg/L) and varied concentrations of particulate cadmium.It was found that the concentration of cadmium increased with increased concentration of particulate cadmium, and that the ratios of Cd/Al in gills of the fish exposed to the particulate cadmium was apparently higher than that in the bulk solution.The bioavailability of particulate cadmium via gills of fish was demonstrated.
- Key words：cadmium fish gills speciation bioavailability suspended solidh
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