摘要
本文研究了扁藻、三角褐指藻、丰年虫对￣（１１０ｍ）Ａｇ的浓集以及￣（１１０ｍ）Ａｇ在两组实验条件下（天然海水与过滤海水）进入泥蚶体内的器官通道、积累器官分布及排泄。结果表明：扁藻比三角褐指藻早到达动态平衡，且浓集能力前者高于后者一个数量级，二者的浓集系数分别为１．０９×１０￣３、４．０６×１０￣２；丰年虫的无节幼体对￣（１１０ｍ）Ａｇ的浓集过程离散度较大，浓集系数在１．３×１０￣２～１．５×１０￣２之间；泥蚶各组织器官均能迅速浓集￣（１１０ｍ）Ａｇ，紧要器官依次为：内脏＞鳃＞外套膜＞斧足＞闭壳肌＞血液＞外壳；胃肠为￣（１１０ｍ）Ａｇ吸收的主要器官通道；天然海水中泥蚶各组织器官对￣（１１０ｍ）Ａｇ的浓集能力（除闭壳肌外）均大于过滤海水实验组；排泄实验后，泥蚶的血液￣（１１０ｍ）Ａｇ损失的百分比较大，而鳃、外套膜、内脏中￣（１１０ｍ）Ａｇ的残留量较大，外壳除表现出对￣（１１０ｍ）Ａｇ的重吸收外，还与￣（１１０ｍ）Ａｇ在体内转移有关。
Abstract The concentrations of ￣(110m)Ag in Platymonas sp.,Phacforactylum tricornutumBohlin,Artemia salina Sinnaeus,and under the two different conditions(natural sea water andfiltered sea water),the concentration,distribution and excretion of‘￣(110m)Ag in Arca granosa Linnuawere studied.The results showed that Platymonas sp.arrived at its dynamic equilibrium earlierthan Phacodactylum tricornutumm Bonlin. Also,the concentration ability of the former was tentimes higher than the later.The values of their concentration factors were 1.09×10￣3,4. 06× 10￣2respectively. The process of ￣(110m)Ag concentrated by Ariemia salina Sinnaeus was scattered, varyingfrom 1.3 × 10￣2 to 1.5 × 10￣2.￣(110m)Ag can be fast concentrated by various organs in Arca granosa.Among them the concentration orders were as follows:viscera>gill>mantle>abdofninal>leg>adductor > blood > shell.Viscera was the main organ for the absorption of ￣(110m)Ag. Except foradductor of Arca granosa,the concentration ability of other organs in natural sea water was high-er than that in the filtered sea water. After the excretion experiment,loss of￣(110m)Ag from theblood was obvious,while the remains of￣(110m)Ag in gill,mantle and viscera were remarkable. Theshells showed the character of external re-absorption of￣(110m)Ag and the character of internal trans-fer of￣(110m)Ag.
出处
《海洋环境科学》
CAS
CSCD
北大核心
1995年第1期26-31,共6页
Marine Environmental Science
