silica exposure Articles

  • Workers` silica exposure at Fracking sites far exceeds OSHA Limit, NIOSH study finds

    The concentration of silica in the air workers breathe exceeded occupational health criteria at all 11 hydraulic fracturing sites tested by the National Institute for Occupational Safety and Health, the American Industrial Hygiene Association announced July 31. Researchers measured the silica levels of more than 100 personal breathing zone samples at fracking sites in five states, finding levels ...


    By Bloomberg BNA

  • Silver Membranes in Monitoring Respirable Crystalline Silica

    Crystalline silica, most commonly found in the form of quartz, is a basic component of the earth; it’s found in soil, sand granite, and other minerals. During many industrial processes, crystalline silica is released as particles that are 100 times smaller than beach sand.1 Due to their size, these mineral particles cannot easily be cleared by human lungs. Instead, they persist in the ...


    By Sterlitech Corporation

  • Damage of concrete by sulphate attack and alkali-silica reaction

    A holistic approach was adopted to examine concrete durability by taking into account both physical aspects (such as capillary porosity, micro-cracking, macrovoids) and chemical reactions. A ternary representation of the complex damage process in reinforced concrete structures was used by examining the coexistence of the main three factors affecting the concrete durability: a) interconnected ...


    By Inderscience Publishers

  • Synthesis and characterisation of nano silica-based coatings for protection of antique articles

    Antique articles are endangered by environmental effects such as humidity, UV and variation of temperature. Improved physical surface resistance is in an increasing demand in protection of cultural heritage. One possible way is their protection by suitable hydrophobic coatings. In this work, the experimentation of protective treatments on the soda glass, mud brick and copper, characteristic ...


    By Inderscience Publishers

  • OSHA announces proposed silica rule, lowering PEL, ending lengthy OMB review

    Federal efforts to protect workers from silica exposure entered a new phase Aug. 23 when the Occupational Safety and Health Administration finally announced its proposal for regulating silica dust. OSHA's proposed rule would set a permissible exposure limit (PEL) of 50 micrograms of respirable crystalline silica per cubic meter of air. The ...


    By Bloomberg BNA

  • Analysis of Polychlorinated Biphenyls in Fish Oil Using Supelclean EZ-POP NP, Silica Gel SPE, and an SLB-5ms GC Column

    Polychlorinated biphenyls (PCBs) were once widely used in many industrial and commercial applications such as insulating fluids, dielectrics, and lubricants. This included their extensive use in electrical transformers. PCB use has been banned in many countries, and the Stockholm Convention currently prohibits their production and use ...


    By MilliporeSigma

  • Managing Regulatory Burdens

    hazardous materials can be found at virtually every construction project in the United States. Surprisingly to some, a brick is considered a hazardous material under the Occupational Safety and Health Administration's (OSHA) Hazard Communication regulations as a source of crystalline silica if cut or sawed. Primer purchased at the local hardware store is a flammable liquid to a highway patrol ...


    By Verisk 3E

  • The Top 5 upcoming OHS regulatory events you need to know about: #5

    U.S. agencies and regulatory bodies are constantly proposing, reviewing, and finalizing new rules that often mean significant changes for businesses across the nation. Almost any company of any size needs to be aware of forthcoming changes that will impact how they manage their impacts and responsibilities related to occupational health and safety (OHS). However, between proposed rules, final ...


    By Intelex Technologies Inc.

  • One-year monthly survey of rotavirus, astrovirus and norovirus in three sewage treatment plants (STPs) in Beijing, China and associated health risk assessment

    To evaluate the presence and distribution of the three main viruses (rotavirus, astrovirus, and norovirus) responsible for human acute gastroenteritis in sewerage systems, a one-year study was carried out in Beijing, China. A total of 96 samples of influent and effluents from three sewage treatment plants (STPs) were collected from November 2006 to October 2007. Silica was used to concentrate ...


    By IWA Publishing

  • The Spectrex particle counter used in study of pharmaceutical glass delamination.

    Delamination, or the generation of glass flakes in vials used to contain parenteral drug products, continues to be a persistent problem in the pharmaceutical industry. To understand all of the factors that might contribute to delamination, a statistical design of experiments was implemented to describe this loss of chemical integrity for glass vials. Phase I of this study focused on the effects ...


    By Spectrex Corporation

  • An in vitro investigation of the differential cytotoxic responses of human and rat lung epithelial cell lines using TiO2 nanoparticles

    The aim of this study was to compare the cytotoxicity endpoints in two different lung epithelial cell lines following in vitro exposures to well characterised nano (or ultrafine) and fine-sized TiO2 particles and, subsequently, compare them to previously reported in vivo lung toxicity data. Cells in culture (human lung epithelial (A549) or rat lung epithelial cells (L2)) were incubated with doses ...


    By Inderscience Publishers

  • What does the environment have to do with diseases that affect the immune system?

    The rise in recent decades of diseases such as inflammatory bowel disease and rheumatoid arthritis suggests that factors in the environment are contributing. In 1932, New York gastroenterologist Burrill Crohn described an unusual disease in 14 adults. The patients had bouts of abdominal pain, bloody diarrhea, and lesions and scars on the bowel wall. Doctors in other parts of North America ...


    By Ensia

  • Dust monitoring

    Generally, two different approaches are used to measure the amount of dust deposited on a surface; Determination of the soiling of a surface, by a change in its properties; Determination of the quantity of dust deposited, by weight. WHAT IS DUST? Dust is a generic term used to describe fine particles that are suspended in the atmosphere. Dust comes from a wide variety of sources, including soil, ...


    By Queensland Laboratory

  • Process-generated contaminants

    Overview: There is not currently a formal and universally recognised definition of a process-generated substance. Process-generated contaminants can be generated as emissions from combustion processes, abrasion and/or other processes that physically or chemically degrade or otherwise modify the starting material(s), e.g. degradation/composting of organic materials. Such ...

  • New CDM Regs: Be careful for what you wish for, advises expert

    New CDM Regulations came into force this month (April 6) to tackle among other matters the unacceptably high number of people suffering from workplace dust and emission ailments (more than 13,000 says the HSE)* but they also signal an end to CDM co-ordinators. So, what now for building site safety? asks Gareth Billinghurst, director and senior auditor at online safety legislation experts Cedrec. ...

  • Think health as well as safety

    Lee Calver of Workplace Law writes about how the HSE is making sure that the construction industry ‘thinks health’ as well as safety’. Not many weeks pass without the Health and Safety Executive (HSE) releasing new research or detailing ...


    By Altius Vendor Assessment Ltd

  • Why monitor dust in the workplace?

    Almost any place of employment can present a potential threat to health and safety from airborne particulates and aerosols. It is important to note, however, that dust hazards are not necessarily visible to the human eye and that the finest particles can represent the greatest threat because of their ability to travel deepest into the lungs. Effective monitoring is therefore key to the ...


    By Ashtead Technology Ltd

  • Tiny materials in countless products raise big questions for environment and health

    Nanotechnology opens a universe of possibilities — but also creates a world of unknowns. In recent years, efforts to develop the Next Big Thing — whether in medicine, computer technology, pollution prevention or high-performance materials — have turned to some really, really small things: nanomaterials. Working at the ...


    By Ensia

  • Common Ion Exchange System Problems and How to Fix Them

    Ion exchange (IX) systems can be an efficient solution for various demineralization, purification, and wastewater treatment needs. In fact, IX systems deliver several advantages over chemical treatment, as they generally require less space, ...


    By SAMCO Technologies, Inc.

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