title: [A experimental study on the effect of fluorine capture of calcium based coal briquette].
abstract: OBJECTIVE
  To study on the fluorine capture effect of calcium based coal briquette with fluorine capture additive in coal-burning fluorosis area.
  
  
  METHODS
  Add proper proportions of calcium based fluorine capture additive in high fluorine coal for making coal briquette were added, and were added the fluorine in coal cinder in order to reduce its emission. Meanwhile, to determine the composes of coal briquette were added, the percentage of fluorine in coal cinder and the concentration of fluoride, sulfur dioxide and PM10 were determinated, to evaluate the effect of fluorine capture and the level of door air pollution.
  
  
  RESULTS
  After pilot-scale studying on the effect of fluorine capture in 30 households at coal-burning fluorosis area in Guiding of Guizhou Province. The average fluorine capture rate were 71.8%, and the average concentration of fluoride were 0.0052 mg/m3, which reduces by 27.8% in comparison with control group and were lower than environmental air quality standard (0.007 mg/m3); and the average concentration of SO2 were 0.67 mg/m3, which reduces 52.8% in comparison with control group and slightly higher than those of indoor air quality standard (0.5 mg/m3).
  
  
  CONCLUSIONS
  The application of the coal briquette made by calcium based fluorine capture additive could reduce the pollution caused by high fluorine coal, could improve the quality of indoor air.
authors.affiliation: Institute for Environmental Health and Related Product Safety, China CDC, Beijing 100021, China. yangjiaolan@126.com
authors.forename: Jiaolan
authors.initials: J
authors.lastname: Yang
authors.forename: Dongqing
authors.initials: D
authors.lastname: Chen
authors.forename: Xin
authors.initials: X
authors.lastname: Jin
authors.forename: Bingcheng
authors.initials: B
authors.lastname: Zhao
authors.forename: Bo
authors.initials: B
authors.lastname: Ying
authors.forename: Shuquan
authors.initials: S
authors.lastname: Wang
authors.forename: Shengda
authors.initials: S
authors.lastname: Li
authors.forename: Cuifu
authors.initials: C
authors.lastname: Yang
mesh_terms: D016902:Air Pollution, Indoor / Q000517:prevention & control*; D002118:Calcium / Q000737:chemistry*; D003031:Coal / Q000032:analysis*; D004391:Dust / Q000032:analysis; D005459:Fluorides / Q000009:adverse effects* / Q000032:analysis; D005461:Fluorine / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D003031:Coal; D004391:Dust; D005461:Fluorine; D005459:Fluorides; D002118:Calcium