Respirable silica dust suppression during artificial stone countertop cutting.
Respirable silica dust suppression during artificial stone countertop cutting.
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DOI：
10.1093/annhyg/meu083
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发表时间：
2015-01
期刊：
影响因子：
--
通讯作者：
Phillips ML
中科院分区：
文献类型：
--
作者：
Cooper JH;Johnson DL;Phillips ML
评估三种类型的控制措施在减少手持圆锯切割人造石台面过程中可吸入二氧化硅暴露的相对有效性。配备有金刚石分段刀片的手持式蜗杆驱动圆锯装配有供水装置以如典型地润湿刀片。将正常湿叶片条件与（i）湿叶片加“水帘”喷雾和（ii）湿叶片加局部排气通风（LEV）进行了比较。在24 m3不通风的帐篷中，在每种条件下，在人造石英台面石中进行4次重复的6 mm深、3 mm宽的切口的30 min试验。还进行了一次干切削试验以进行比较。可吸入旋风器呼吸区样本收集在锯操作员和重量分析的可吸入质量和可吸入石英质量的X射线衍射。呼吸性粉尘的平均石英含量为58.5%。30分钟质量浓度和石英任务浓度的范围（mg/m−3）如下：单独湿刀片：3.54-7.51和1.87-4.85;湿刀片+幕帘：1.81-5.97和0.92-3.41;湿刀片+ LEV：0.20-0.69和<0.12-0.20。干切割作业的浓度为69.6 mg m−3质量和44.6 mg m−3石英。对于可吸入粉尘和可吸入二氧化硅，湿刀片+ LEV和仅湿刀片条件之间存在统计学显著差异（α = 0.05），但湿刀片+幕帘和仅湿刀片条件之间无统计学显著差异。与仅使用湿锯片的条件相比，使用湿锯片加LEV的锯切可将平均可吸入粉尘和石英作业暴露量降低10倍。我们无法显示在喷射路径中的水幕的统计学显著益处，但数据表明一些可吸入粉尘抑制。
To assess the relative efficacy of three types of controls in reducing respirable silica exposure during artificial stone countertop cutting with a handheld circular saw. A handheld worm drive circular saw equipped with a diamond segmented blade was fitted with water supply to wet the blade as is typical. The normal wetted-blade condition was compared to (i) wetted-blade plus ‘water curtain’ spray and (ii) wetted-blade plus local exhaust ventilation (LEV). Four replicate 30-min trials of 6-mm deep, 3-mm wide cuts in artificial quartz countertop stone were conducted at each condition in a 24-m3 unventilated tent. One dry cutting trial was also conducted for comparison. Respirable cyclone breathing zone samples were collected on the saw operator and analyzed gravimetrically for respirable mass and by X-ray diffraction for respirable quartz mass. Mean quartz content of the respirable dust was 58.5%. The ranges of 30-min mass and quartz task concentrations in mg m−3 were as follows—wet blade alone: 3.54–7.51 and 1.87–4.85; wet blade + curtain: 1.81–5.97 and 0.92–3.41; and wet blade + LEV: 0.20–0.69 and <0.12–0.20. Dry cutting task concentrations were 69.6mg m−3 mass and 44.6mg m−3 quartz. There was a statistically significant difference (α = 0.05) between the wet blade + LEV and wet blade only conditions, but not between the wet blade + curtain and wet blade only conditions, for both respirable dust and respirable silica. Sawing with a wetted blade plus LEV reduced mean respirable dust and quartz task exposures by a factor of 10 compared to the wet blade only condition. We were unable to show a statistically significant benefit of a water curtain in the ejection path, but the data suggested some respirable dust suppression.
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DOI：
10.1080/15459624.2012.747399
发表时间：
2013-02-01
影响因子：
2
作者：
Beaudry, Charles;Lavoue, Jerome;Gerin, Michel
通讯作者：
Gerin, Michel
影响因子：
9.6
作者：
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通讯作者：
Shitrit, David
DOI：
10.1179/2049396713y.0000000049
发表时间：
2014-01-01
影响因子：
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作者：
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通讯作者：
Romero-Morillo, Jose
DOI：
10.1080/15459624.2013.789706
发表时间：
2013-07-01
影响因子：
2
作者：
Phillips, Margaret L.;Johnson, David L.;Johnson, Andrew C.
通讯作者：
Johnson, Andrew C.