• Users Online: 831
  • Home
  • Print this page
  • Email this page
Year : 2019  |  Volume : 9  |  Issue : 4  |  Page : 208-212

Respiratory effects of occupational exposure to low concentration of hydrochloric acid among exposed workers: a case study in steel industry

1 Research Center for Environmental Pollutants, Faculty of Health, Qom University of Medical Science, Qom, Iran
2 Neuroscience Research Center, Faculty of Health, Qom University of Medical Science, Qom, Iran
3 Research Student Committee, School of Health, Qom University of Medical Sciences, Qom, Iran

Correspondence Address:
Abolfazl Mohammadbeigi
Neuroscience Research Center, Faculty of Health, Qom University of Medical Science, Qom
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2045-9912.273958

Rights and Permissions

Occupational exposure to hydrochloric acid in pickling of steel for remove rust or iron oxide scale from iron processing occurs at low concentration. This study aimed to investigate the respiratory symptoms and pulmonary dysfunction caused by exposure to low concentration of hydrochloric acid in acid washing unit in one of the steel industries. A case control study was carried out in the acid washing unit of the cold rolling of the steel industry in 2017. The exposed group included 45 male workers, and another 41 unexposed employees from official employees were enrolled as control group. A questionnaire was used to collect personal and occupational data and pulmonary function tests, including forced vital capacity (FVC), forced expiratory volume in the first second and peak expiratory flow rate followed guidelines given by the American Thoracic Society and measured with a portable calibrated vitalograph spirometer. For determination of acid concentration, 21 breathing zone air samples were collected in accordance with Method 7903 NIOSH. The findings showed that nose sensitivity, throat irritation and shortness of breath were the highest prevalence symptoms among exposed persons (30.4% to 32.6%). Also, the results showed that FVC and forced expiratory volume in the first second had highest and direct or positive correlation with height (0.965 and 0.927, respectively). Age and weight put in the next priorities (P < 0.01). On the other hand, based on the results of multivariate linear regression, exposing to the acid and job history are two main predictor factors for FVC. So that, the exposing to acid, by itself can reduce FVC as 4.386 units. This value is equal to 1.117 for the job history. Exposure to low concentrations of hydrochloric acid alone could increase the risk of respiratory tract damage and pulmonary function disorders. But the extent to which it can cause respiratory complications for occupational exposure is still unknown and requires further study. This study was approved by Ethical Committee of Qom University of Medical Sciences (approval No. IR.MUQ.REC.1397.118) on November 6, 2018.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded62    
    Comments [Add]    

Recommend this journal