Improvement of the determination of fluoride and chloride in clay

Objective

The clay materials used in the brick industries are currently monitored to avoid air and ground water pollution. Some areas suffer from a severe pollution by emission of fluoride into the atmosphere and its subsequent transport into the ground water as clay may contain 200 to 1200 ug/g of F. As an example, the brick and ceramic industry is responsible for 50% of the total F emission in The Netherlands. The emissions are calculated from the difference in the F content of clay and the final product (brick). Chloride is responsible for corrosion and has to be determined to assess this risk. Problems have been observed during baking of clay. In some cases, raw materials are rejected if the Cl and F contents are too high which cause an economic concern. As a consequence, many European countries have implemented legislations for the maximum authorised values in gaseous emission of F and Cl from brick industries, which strongly stresses the need for the control of the quality of measurements and therefore for the production of reference materials.

Status:
Certification to be concluded by the end of 1992 (candidate CRM 461)

Programme(s)

• FP2-BCR 4 - Research and development programme (EEC) in the field of applied metrology and chemical analysis (Community Bureau of Reference - BCR), 1988-1992

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Netherlands Energy Foundation

Address

3,Westerduinweg
1755 ZG Petten
Netherlands

Participants (14)

Bundesanstalt für Materialforschung und Materialprüfung

Germany

Address

Unter Den Eichen 87
12205 Berlin

Centre National de la Recherche Scientifique (CNRS)

France

Address

69390 Vernaison

Faelleskemikerne/Elsam Soenderijyllands Hoejspaendingsvaerk

Denmark

Address

185,Flensborgvej
6200 Aabenraa

I.N.W. - Univeristeit Gent

Belgium

Address

86,Proeftuinstraat
9000 Gent

INSTITUT NATIONAL DE L'ENVIRONNEMENT INDUSTRIEL ET DES RISQUES

France

Address

Parc Technologique Alata
Verneuil En Halatte

Ministère des Affaires Economiques

Belgium

Address

17A,rue De La Senne
1000 Bruxelles

Ministère des Affaires Economiques

Belgium

Address

17A,rue De La Senne
1000 Bruxelles

RW-TÜV - Anlagentechnik GmbH

Germany

Address

Langemarckstraße 20
45141 Essen

Ruhrkohle AG

Germany

Address

Wilhelmstraße 98
44649 Herne

Stazione Sperimentale per i Combustibili SpA

Italy

Address

Viale A De Gasperi 3
20097 San Donato Milanese

Technisch Centrum voor de Keramische Industrie

Netherlands

Address

8,Hoofdstraat 8
6904 AE De Steeg

UNIVERSITY OF PLYMOUTH

United Kingdom

Address

Drake Circus
Plymouth

Universidad de Oviedo

Spain

Address

8,C/ Julían Clavería
33006 Oviedo

VTT Technical Research Centre of Finland

Finland

Address

7,Biologinkuja
02150 Espoo