Reclamation of the Fibronit plant in Bari.
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Transcript of Reclamation of the Fibronit plant in Bari.
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Reclamation of the Fibronit plant in Bari.
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Reclamation of the Fibronit plant in Bari.
- the Asbestos risk;
- the risk assessment of the ex-Fibronit plant and its reclamation;
- the outdoor monitoring of the ex-Fibronit area.
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Asbestos riskAsbestos:
a calcium-magnesium silicate mineral of flexible or elastic fibers.
Chrysotile Asbestos fibers.
Mineral type Asbestos type Chemical formulae
Serpentine (flexible fibers - smaller than amphibole asbestos)
Chrysotile or white asbestos Mg3[Si2O5](OH)4
Actinolite Ca2(MgFe)5Si8O22(OH)2
Amosite or brown asbestos (MgFe)7Si8O22(OH)2
Anthophyllite Mg7Si8O22(OH)2
Crocidolite or blue asbestos Na2Fe2(FeMg)3Si8O22(OH)2
Amphibole (elastic fibers)
Tremolite Ca2Mg5Si8O22(OH)2
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Asbestos riskFeatures:
high resistance to chemical and physical agents.Use:
mixed with other elements.
The Asbestos was widely used in the construction industry like asbestos-cement.
Banned in Italy (Law 257/1992)
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Asbestos risk
Weathering of fibrous asbestos sheeting showing loose fibers
Asbestos poses risk if the fibers become dislodged and thus they can be inhaled.The inhalation of asbestos fibers can cause: Asbestosis; Malignant Lung Cancer; Peritoneal and Pleural Mesothelioma.
Other asbestos-related diseases are: Asbestos warts; Diffuse pleural thickening; Pleural plaques.
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The Fibronit risk assessment and its reclamation
The Fibronit, active for 50 years (1935 - 1985), was one of the biggest Italian makers of asbestos-cement manufactures;
they mainly produced pipes, plates and other special parts in cement with a percentage of asbestos ranging from 15 to 20%.Moreover, the plant itself consisted of several buildings with roofs completely made up of “onduline” in asbestos-cement.Nowadays this plant spreads on an area of about 9 hectares and is surrounded by urban agglomeration.
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The Fibronit risk assessment and its reclamation
The matrixes of asbestos founded in the ex-Fibronit site were:– compact matrix asbestos;– friable matrix asbestos;– loose fibers asbestos.
All materials containing asbestos were removed from the ex-Fibronit plant.
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The Fibronit risk assessment and its reclamation
Before the removal the products containing asbestos were encapsulated with a special varnish in order to limit the release of fibers.
The waste generated within the yard was placed in thick bags, identified with a waste identification code and sent for the disposal to special waste dumps.
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The outdoor monitoring of ex Fibronit area.A monitoring network was installed, outside the ex-Fibronit, by the ARPA Puglia Provincial Department of Bari.
It consisted of 4 control units taking air samples by aspiration at constant flow, of fixed volumes of air through membrane filters made up of mixed cellulose esters and having pores with a diameter of 0.8 micrometers.
These units were planned according to asbestos legislation including also the Ministerial Decree 06/09/1994.
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The outdoor monitoring of ex Fibronit area.
The concentration of the “natural environment fund” of asbestos loose fibers resulted to be 0.33 f/l.
Chrysotile Asbestos fibers (SEM micrograph)
Never detected limits exceeding twice the “ natural environment fund“, that is 0.66 f/l, which represents the danger level.
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ConclusionAt present, in the ex Fibronit plant, the perimeter walls of each building are still standing; they will be
involved in a specific plan of complete demolition.
While waiting for this demolition, the Arpa Puglia is still monitoring the area outside the plant with 4 sequential units, in order to define the concentration of airborne fibers.
A natural park will be built in the ex-Fibronit area as soon as it is completely reclaimed.
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