Occupational exposure assessment of tungsten and cobalt in tungsten alloy manufacturing enterprisesChinese Full TextEnglish Full Text (MT)
HE Wei-hong;TAN Qiang;CAO Xian-wen;CAI Lian-gong;ZHANG Han-lin;FU Sheng;LIU Ai-guo;SUN Kang;ZHANG Xue-yan;WANG Zhong-xu;PENG Ren-he;Hunan Prevention and Treatment Center for Occupational Diseases;Zhuzhou Occupational Diseases Prevention and Treatment Center;National Institute of Occupational Health and Poison Control,Chinese Center for Disease Control and Prevention;
Abstract: [Objective] To investigate the internal and external exposure levels of tungsten and cobalt in workers in tungsten alloy manufacturing enterprises,and analyze their distribution characteristics in order to provide data support for occupational health risk assessment of hard metal lung disease induced by tungsten alloy.[Methods] Four tungsten alloy manufacturing enterprises of different sizes were selected,in which 489 workers exposed to tungsten and its alloys for more than one year were enrolled as exposure group by random sampling,and 325 workers without exposure as control group.Occupational health conditions of workplaces were investigated and the levels of airborne tungsten and cobalt were detected.The whole blood samples of the workers were collected to determine the tungsten and cobalt levels by inductively coupled plasma mass spectrometry.[Results] The exposure ranges of tungsten and cobalt in workplace air were ＜0.03-4.42 mg/m3（median,0.11 mg/m3） and ＜0.013-0.677 mg/m3（median,0.017 mg/m3）,respectively.Wet-grinding,drying,sintering,machining,and product packaging workers had higher air cobalt exposure levels than corresponding national standard limits.In the exposed group,the positive blood tungsten rate was 12.5%（concentration,＜0.5-21.0 μg/L; median,＜0.5 μg/L）,and the positive blood cobalt rate was 61.1%（concentration,＜0.5-15.7 μg/L; median,0.7 μg/L）,which were both higher than those in the controls（P ＜ 0.01）.There were significant differences in blood tungsten and cobalt levels between the workers with different types of job（P ＜ 0.01）.Blood tungsten was positively correlated with airborne tungsten（r=0.106,P ＜ 0.05）.Blood cobalt was also positively correlated with airborne cobalt（r=0.197,P ＜ 0.01）.[Conclusion] The tungsten concentrations in workplace air meet the national health requirement,but the cobalt concentrations exceed the national standard limit.The tungsten and cobalt levels in blood are positively correlated with the airborne tungsten and cobalt levels respectively.
Keywords：
tungsten; tungsten alloy; cobalt; hard metal; occupational exposure; biological monitoring;
- DOI：
10.13213/j.cnki.jeom.2017.16492
- Series：
- Subject：
- Classification Code：
R135
- Mobile Reading
Read on your phone instantly
Step 1Scan QR Codes
"Mobile CNKI-CNKI Express" App
Step 2Open“CNKI Express”
and click the scan icon in the upper left corner of the homepage.
Step 3
Scan QR Codes
Read this article on your phone.
- Download
- Online Reading
Download the mobile appuse the app to scan this coderead the article.
Tips: Please download CAJViewer to view CAJ format full text.
Download: 149 Page: 245-249 Pagecount: 5 Size: 1075K
Citation Network
Related Literature
- Similar Article
- Reader Recommendation
- Associated Author