呼吸性粉尘是造成矿工尘肺病的元凶。为了掌握采煤机滚筒截煤产生的呼吸性粉尘分布规律,利用Side Pak AM520i型个体暴露粉尘仪,测定了采煤机顺风、逆风正常运行状态下截煤滚筒产尘范围内PM_(2.5)、PM_(5)粉尘的质量浓度。结果表明:1)采...呼吸性粉尘是造成矿工尘肺病的元凶。为了掌握采煤机滚筒截煤产生的呼吸性粉尘分布规律,利用Side Pak AM520i型个体暴露粉尘仪,测定了采煤机顺风、逆风正常运行状态下截煤滚筒产尘范围内PM_(2.5)、PM_(5)粉尘的质量浓度。结果表明:1)采煤机滚筒顺风截煤时,前滚筒测点的呼吸性粉尘PM5约为700 mg/m^(3),其中PM_(2.5)占47%,后滚筒测点的呼吸性粉尘PM_(5)约为350 mg/m^(3),其中PM_(2.5)占75%;2)采煤机滚筒逆风截煤时,前滚筒测点的呼吸性粉尘PM5约为400mg/m^(3),其中粒径2.5~5μm粉尘颗粒为主要成分,后滚筒测点的呼吸性粉尘PM_(5)约为500 mg/m^(3),其中粒径0~2.5μm的粉尘颗粒为主要成分。展开更多
The three measurement periods: the TOMS Nimbus-7 TOMSN7L3 v008 from 1978 to 1993, the TOMS EP TOMSEPL3 v008 from 1996 to 2005 and the OMI OMTO3d v003 from 2004 to 2008 have allowed the presence of dust to be observed ...The three measurement periods: the TOMS Nimbus-7 TOMSN7L3 v008 from 1978 to 1993, the TOMS EP TOMSEPL3 v008 from 1996 to 2005 and the OMI OMTO3d v003 from 2004 to 2008 have allowed the presence of dust to be observed in the 10°North to 20°North latitudinal band (10 - 20 band) of Africa. The 10 - 20 band has a permanent dust presence. The AERONET data show AOD peaks exceeding 2 in Senegal and Niger (on an AOD scale). The statistical study reveals intra-annual relationships in deposition. In Senegal, a significant deposition is observed.展开更多
文摘The three measurement periods: the TOMS Nimbus-7 TOMSN7L3 v008 from 1978 to 1993, the TOMS EP TOMSEPL3 v008 from 1996 to 2005 and the OMI OMTO3d v003 from 2004 to 2008 have allowed the presence of dust to be observed in the 10°North to 20°North latitudinal band (10 - 20 band) of Africa. The 10 - 20 band has a permanent dust presence. The AERONET data show AOD peaks exceeding 2 in Senegal and Niger (on an AOD scale). The statistical study reveals intra-annual relationships in deposition. In Senegal, a significant deposition is observed.
