摘要:

The concentrations of Cu and Ni soluble at pH 2 were measured in surface waters of Otago Harbour using methodology that pays careful attention to measurement and control of sources of trace metal contamination. Both elements were preconcentrated by coprecipitation with cobalt pyrrolidine dithiocarbamate and analysed by atomic absorption spectrometry with an overall extraction yield of 97%. Samples were not filtered because of the excessive contamination caused by membrane filters and the filtration apparatus. Concentrations of Cu (0.1–0.2 μg/kg) and Ni (0.33 μg/kg) at the mouth of Otago Harbour were within the range of recent data for oceanic surface waters. Cadmium concentrations in the samples were found to be below the detection limit of 0.1 μg/kg. Ni displayed uniform concentrations throughout the harbour, and Cu exhibited an increase in concentration landwards from the harbour entrance that is consistent with known hydrographic chemical properties of this system. Mass‐balance considerations indicated that industrial, freshwater, and atmospheric inputs of Cu were negligible. Cu accumulation in the upper harbour was probably a result of injection from harbour sediments.

ISSN:0028-8330    

DOI:10.1080/00288330.1981.9515939

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

ISSN:0028-8330    

DOI:10.1080/00288330.1981.9515940

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

ISSN:0028-8330    

DOI:10.1080/00288330.1981.9515941

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor