Control and hygienic regulation of air pollution by fibrous particles

Abstract

Introduction. The correct assessment of air pollution by fibrous particles allows controlling the risks of their exposure for workers and the general population. The indices for control of air pollution by fibrous particles differs from established for other dusts. The main control methods are optical and electron microscopy. Each method has its own advantages and disadvantages, which should be reflected in the national regulatory framework.

The aim of study — to test the modern methods for the control of air pollution by fibrous particles.

Materials and methods. A comparative analysis of modern methods for controlling air pollution by fibres with practical testing of determining their numerical concentrations by the method of membrane filters using optical phase contrast (PCOM) and scanning electron microscopy (SEM) was performed.

Results. Based on field studies performed in various industries, the advantages and disadvantages of the methods used in the world to control air pollution by fibrous particles were evaluated.

Conclusions. The main methods for determining fibers in the air are PCM and SEM/EDXA. The development of regulatory documents for calculating the numerical concentrations in the work area air and in the ambient air will help to ensure the correct risk assessments for occupational and non-occupational exposure of fibrous particles.