Abstract
Relining is a trenchless technology of recoating the inside walls of damaged water pipes using composite materials. In the Safe Pipe project, co-financed by Regione Lombardia, alternative polymeric materials for relining the drinking water distribution system of the city of Milan have been developed. Relining polymers have been evaluated for their toxicity. The identification of product impurities was performed by HPLC/HRMS and GC/MS analysis and safety evaluation was conducted applying toxicity data, when available, or applying QSAR models. Results showed low level of toxic substances in polymerized resins and in water samples in a migration/leaching test performed in a field experiment.
Highlights
The integrated water service for the city of Milan captures, purifies and distributes drinking water, collects sewage and manages its treatment before releasing it into the environment
The aim of this work was, as a first step, evaluating the toxicity of these materials using all information contained in the material safety data sheets (MSDS) and those available in the scientific literature and, for components were no toxicological information are available, using QSAR (Quantitative Structure-Activity Relationship) models
The MSDS of some compounds were lacking of some important toxicological information such as mutagenicity, developmental toxicity, carcinogenicity
Summary
The integrated water service for the city of Milan captures, purifies and distributes drinking water, collects sewage and manages its treatment before releasing it into the environment. In the city of Milan, the drinking water. (2015) Safety Evaluation of New Polymer Materials Proposed for Relining Drinking Water Pipes in the City of Milano. The distribution system consists of about 230 million m3 of delivered drinking water per year. Corrosion of pipes can produce leaks and loss of efficiency in the drinking water distribution system with significant economic and environmental consequences. It is estimated that the loss of drinking water in Milan is about 10% [1]. It is clear that significant economic and environmental consequences are due to this problem
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