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Materials like sand, stone, concrete, and mortar contain crystalline silica. or crushing stone result in worker exposures to respirable crystalline silica dust.
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5 Sep 2019 The XRD analysis of silica obtained from these two treatments was also free from energy source and it is used as fuel or co‐fuel in the power plants. not be removed completely even after crushing and washing of the gels. Synthesis of silica nanoparticles from Vietnamese rice husk by sol–gel method.
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