Metals in Ulva Lactuca in Hong Kong Intertidal Waters
Abstract:The levels of Mn, Fe, Ni, Cu, Zn, Cd and Pb in Ulva lactuca L. collected from 24 intertidal sites around the Island of Hong Kong were determined. Twelve of the sites are in the rural southern parts of the island where the coastal waters are relatively clean. The remaining 12 sites are located in the north and within Victoria Harbour which receives, apart from industrial effluents, untreated domestic sewage from a population of some 3.5 million. The mean levels of Mn, Fe, Ni, Cu, Zn and Pb in Ulva from the urban sites were respectively 4.0, 4.6, 1.8, 2.3, 2.4 and 4.6 times those from the rural sites. However, somewhat similar levels of Cd were found in the alga amongst all the sites. Some locations of high levels of metal contamination have been identified in Victoria Harbour. Preliminary findings indicated that Ulva is a good indicator of Mn, Fe, Cu, Zn and Pb contaminations.
Document Type: Research Article
Publication date: July 1, 1990
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