title: [Analysis of urine cadmium and blood cadmium of workers before and after the cadmium dust control].
abstract: OBJECTIVE
  To analyze the urinary cadmium, blood cadmium and urinary beta2-MG of workers in a zinc powder processing plant before and after the cadmium dust control, and to explore the effects of dust control on the prevention and treatment of cadmium hazards.
  
  
  METHODS
  The on-site occupational hazard survey was used to investigate the changes of urine cadmium, blood cadmium and beta3-MG of 84 workers exposed to cadmium before and after the treatment by self-control analysis for evaluating the effects of dust control measures in a zinc powder processing plant.
  
  
  RESULTS
  After treatment of the cadmium dust, the geometric mean of zinc dust in the workplace significantly decreased from 3.38 mg/m3 to 2.22 mg/m3 (P < 0.01). The geometric mean concentration of blood cadmium [(2.19 +/- 1.19) microg/L] and urine cadmium [(1.96 +/- 0.74) microg/g Cr] before treatment were significantly higher than those of one year [(1.63 +/- 0.83) microg/L] and [(1.25 +/- 0.83) microg/g Cr] and two years [(1.36 +/- 0.95) microg/L] and [(0.94 +/- 0.72) microg/g Cr] after the cadmium dust control (P < 0.01), respectively. The positive correlations analysis between urine cadmium and blood cadmium concentration of one and two years before and after the cadmium dust treatment implied that there was significant difference (r = 0.466, P < 0.01).
  
  
  CONCLUSIONS
  Dust treatment could reduce the impact of low concentration cadmium on the urine cadmium and blood cadmium concentrations of the workers exposed to cadmium, and effectively prevent the cadmium poisoning.
authors.affiliation: Changsha City Center for Disease Control and Prevention, Changsha 410001, China.
authors.forename: Li-Meng
authors.initials: LM
authors.lastname: Li
authors.forename: Song-Yun
authors.initials: SY
authors.lastname: Pi
authors.forename: Yu-Lian
authors.initials: YL
authors.lastname: Zhang
authors.forename: Juan-Ping
authors.initials: JP
authors.lastname: Li
authors.forename: Jie
authors.initials: J
authors.lastname: Zhu
mesh_terms: D000328:Adult; D002104:Cadmium / Q000097:blood* / Q000652:urine*; D004391:Dust / Q000517:prevention & control*; D004784:Environmental Monitoring; D006801:Humans; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure / Q000517:prevention & control*
chemical_list: D004391:Dust; D002104:Cadmium