The purpose of this study is to describe the personal exposure to respirable dust and quartz
and in stone crushing units located at west of Iran. A size of 40 personal samples and 40 …

The present research was conducted in a stone quarry of marble located in northeast of Iran.
Time weighted average of total dust, respirable dust, and crystalline silica (α-quartz) …

Background and Objectives: Silica is an inorganic material that found in the nature in various
forms. The hazards of crystal of silica or α-quartz (free silica) is greater than other forms …

Introduction: Dust is one of the significant factors which cause occupational respiratory
diseases among workers. Objective: The main purpose of this study was to determine the …

The study compared lung function among 322 workers in pottery, ceramic, stone-cutter and
stone-grinder factories in the west of the Islamic Republic of Iran. Concentrations of silica …

Background: The term crystallized silica refers to the crystallized form of Sio 2 and quartz,
the most frequency composition in the earth's crust that can cause silicosis and lung cancer …

Objective: Our aim was to determine the occupational exposure level for respirable
crystalline silica (RCS) and respirable dust (RD) among sandstone workers. Materials and …

Owing to the abundance of a sedimentary rock, 65 small-scale quartz manufacturing
enterprises, employing 650 workers, have been established in the region studied. Quartz …

Background and Objective: Silica dust is present in almost all mining operations and can
cause various health problems such as silicosis in workers. The present study aimed to …

Background: Quartz stone grinders are one such group of workers who are exposed to silica
and thereby at risk of developing silicosis. However due to increased campaigning against …