EDMED Details

General

Dataset Name

CTDO, Cd and Hg data in coastal zone of Ligurian Sea (1978)

Data Holding Centre

ENEA Centro Ricerche Ambiente Marino - La Spezia

Time Period

April 1978

Start Date

1978-01-01

End Date

1978-12-31

Project

Geographic Area

Geocoverage

the Ligurian Sea extending from Punta Mesco to Marina di Massa and including the Gulf of La Spezia

Geographic Box (south,north,west,east)

42, 7, 11, 45

Sea Area

Mediterranean Sea

Ligurian Sea

Observations

Parameters

Salinity of the water column

Dissolved oxygen parameters in the water column

Particulate metal concentrations in the water column

Temperature of the water column

Instruments

fluorometers

CTD

discrete water samplers

spectrophotometers

Description

Summary

- At each station, samples were collected at the surface, about 2-3 m from the bottom and at a depth midway between the two using N.I.O. bottles. Dissolved oxygen, conductivity and temperature were measured in situ with a CTD Neil Brown mod. MARK III. The samples utilized for the analysis of inorganic mercury were conserved in glass bottles and acidified with HCl (Carlo Erba, RS) until a pH of 1 was obtained. Those utilized for the determination of cadmium were stored in stable polythene bottles. The surface and the bottom samples were analyzed for cadmium while the sample taken halfway between the two was used for the analysis of mercury. Inorganic mercury was determined using atomic fluorescence spectrometry following the separation of Hg with stannous chloride, the concentration of its vapours on gold granules and the heating of the amalgam in a current of argon. The method showed a standard deviation of 4.5 per cent at a concentration of 20 ng/l of Hg. Cadmium was determined using flameless atomic absorbance spectrometry after electrolytic deposition of Cd at a constant potential after bubbling nitrogen through the sample. A potential of -1.5V with respect to the reference electrode of saturated calomel was used as the reference. The method showed a standard deviation of about 10 per cent at a level of concentration of some tens of ng/l of Cd. The stations were confined to a bathymetry of 100m.

Originator

ENEA Centro Ricerche Ambiente Marino - La Spezia

References

"Misure di cadmio e mercurio nel Mar Ligure, Piro A., Rossi G. Presented at the Convegno Scientifico Nazionale, P.F. Oceanografia e Fondi Marini, Rome, 5-7 March, 1979." 1979-06-01, unknown, unknown

Availability

Availability

unknown

Organization

ENEA Centro Ricerche Ambiente Marino - La Spezia

Contact

Bruschi A.

Address

ENEA Centro Ricerche Ambiente Marino - La Spezia

Lerici

19036

Italy

bruschi@santateresa.enea.it

http://www.santateresa.enea.it

Administration

Local identifier

1196

Creation Date

2014-10-02

Revision Date

2013-07-25