胶州湾水体、浮游生物和沉积物中的锡

TIN SPECIATION IN THE WATER COLUMN,PHYTOPLANKTON AND SEDIMENT OF JIAOZHOU BAY

对胶州湾水体、浮游生物、悬浮颗粒物和沉积物中锡的测定、形式、生物累积等进行研究。不同季节(1987年和1988年)的水体、浮游植物和沉积物测定表明:1.水体总还原无机锡和总锡含量分别为4.2～38.8ng/dm^3,65.6～209ng/dm^3;浮游植物总锡含量为22.4～414mg/kg(干重);沉积物总锡含量为0.015～0.98mg/kg(干重),且在胶州湾港口区测得水体总锡的最大值209ng/dm^3。以上结果与目前世界其它海域、河口类似。2.有些区域有机锡含量已达到或超过某些生物的致毒阈值(对双壳类,其TBT≤0.1μg/dm^3)从而引起水质恶化。3.水体总锡含量与悬浮颗粒量密切相关;浮游植物对锡的生物富集因子高达10~5,说明无机或有机颗粒及生物体在水体锡的循环迁移过程中起重要作用。

Tin speciation in Jiaozhou Bay and its environmental toxicology, including the tin spcciation in seawatcr, biological material, suspended matter and sediments, the bioaccumulation have been studied in detail. Samples of water column, phytoplankton and sediments were collected during 1987 and 1988 for different seasons. 1. Total recoverable inorganic tin (TRISn) and total tin in water (4.2-38.8ng/dm3 and 65.6-209ng/dm3, respectively), phytoplanktons ( 21.4-414mg/kg drying wt.) and sediments ( 0.01 5-0.98mg/kg dryingwt.) arc obtained in Jiaozhou Bay with the maximum in the harbour area (209ng/dm3 for total tin) These results are similat to the data in the world sea and estuaries published recently. 2. However, the organotin may occasionally exceed the toxicological thresholds for some susceptible species ( 0.1μg/dm3 or less TBT for bivalves) leading to water deterioration biologically 3. A linear correlation between total tin and the content of suspended matter in water column is rcgrressed and very high bioaccumulation of tin by phytoplankton (a factor of about 105) is found in the investigated area, which indicates that the particulates of all inorganic, organic and living matter play an important role in the removel of tin from water colmn.