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Abstract

LAKE VARESE, WHICH IS KNOWN TO HAVE A PROBLEM OF EUTROPHICATION, ALSO RECEIVES VARIOUS TYPES OF INDUSTRIAL WASTE, INCLUDING THAT FROM CHEMICAL INDUSTRIES AND GALVANISING. AS THESE ARE SCATTERED AND INTERMITTENT SOURCES, IT IS DIFFICULT TO PROVE THEIR INFLUENCE ON THE LAKE BY ANALYSING THE WATERS, WHILE IT IS WELL KNOWN THAT THE SEDIMENTS, AS WELL AS REFLECTING THE GEOCHEMICAL CHARACTERISTICS OF THE AREA, CAN ALSO PROVIDE USEFUL INDICATIONS IN VERIFYING WHETHER AND TO WHAT DEGREE THE ANTHROPIC EMISSIONS HAVE ALTERED THE NORMAL BIOGEOCHEMICAL CYCLES. ON THE BASIS OF THESE CONSIDERATIONS, A DRAG WAS USED TO COLLECT 31 SAMPLES OF RECENT SEDIMENTS (FIRST 10-15 CM), IN LAKE VARESE. THE SEDIMENT SAMPLES COLLECTED WERE DRIED, SIEVED TO REMOVE THE LARGE COMPONENTS AND GROUND WITH A ZIRCON ROTATING MORTAR. THEY WERE THEN ANALYSED FOR MAJOR ELEMENTS (SI, AL, FE, TI, CA, MG, K AND MN), WHICH REFLECT THE NATURAL MINERAL CONTRIBUTIONS AND FOR TRACE ELEMENTS SUCH AS PB, ZN, CU, NI, CD AND HG, THE CONCENTRATIONS OF WHICH ARE MORE READILY INCREASED BY INDUSTRIAL CONTAMINATION. A DISTRIBUTION MAP WAS DRAWN FOR EACH OF THESE USING COMPUTERISED CARTOGRAPHY.

Additional information

Authors: BAUDO R, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;MARENGO G, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;BO F, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;LATTANZIO A, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;MUNTAU H, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;HANNAERT P ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;JRC-ISPRA, I, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I
Bibliographic Reference: PAPER PRESENTED: OTTAVO CONGRESSO A.I.O.L., PALLANZA/I, MAY 31, JUNE 3, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG XIII/A2, BP 1907, MENTIONING PAPER ORA 34026 I
Availability: Can be ordered online
Record Number: 1989126204500 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: it