TITLE

Designing, Construction, Assessment, and Efficiency of Local Exhaust Ventilation in Controlling Crystalline Silica Dust and Particles, and Formaldehyde in a Foundry Industry Plant

AUTHOR(S)
Morteza, Mortezavi Mehrizi; Hossein, Kakooi; Amirhossein, Matin; Naser, Hasheminegad; Gholamhossein, Halvani; Hossein, Fallah
PUB. DATE
March 2013
SOURCE
Archives of Industrial Hygiene & Toxicology / Arhiv za Higijenu ;Mar2013, Vol. 64 Issue 1, p123
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The purpose of the present study was to design and assess the efficiency of a local exhaust ventilation system used in a foundry operation to control inhalable dust and particles, microcrystal particles, and noxious gases and vapours affecting workers during the foundry process. It was designed based on recommendations from the American Conference of Governmental Industrial Hygiene. After designing a local exhaust ventilation system (LEV), we prepared and submitted the implementation plan to the manufacturer. High concentrations of crystalline silica dust and formaldehyde, which are common toxic air pollutants in foundries, were ultimately measured as an indicator for studying the efficiency of this system in controlling inhalable dust and particles as well as other air pollutants. The level of occupational exposure to silica and formaldehyde as major air pollutants was assessed in two modes: first, when the LEV was on, and second, when it was off. Air samples from the exposure area were obtained using a personal sampling pump and analysed using the No. 7601 method for crystal silica and the No. 2541 method for formaldehyde of the National Institute for Occupational Safety and Health (NIOSH). Silica and formaldehyde concentrations were determined by visible absorption spectrophotometry and gas chromatography. The results showed that local exhaust ventilation was successful in preserving the crystal silica particles in the work environment at a level below the NIOSH maximum allowed concentration (0.05 mg m-3). In contrast, formaldehyde exceeded the NIOSH limit (1 ppm or 1.228 mg m-3).
ACCESSION #
86448981

 

Related Articles

  • OMS-2 Catalysts for Formaldehyde Oxidation: Effects of Ce and Pt on Structure and Performance of the Catalysts. Renhu Wang; Junhua Li // Catalysis Letters;Sep2009, Vol. 131 Issue 3/4, p500 

    OMS-2 (2 × 2 type octahedral molecular sieve) and cerium doped OMS-2 were synthesized by refluxing method. The platinum doped on both samples was prepared by impregnation method for catalytic oxidation of formaldehyde. These catalysts were characterized by BET, XRD, SEM, H2-TPR and Laser...

  • NO x-catalyzed partial oxidation of methane and ethane to formaldehyde by dioxygen. Sen, Ayusman; Minren Lin // Topics in Catalysis;Mar2005, Vol. 32 Issue 3/4, p175 

    At 600 °C, NO x catalyzes the partial oxidation of both methane and ethane by dioxygen to form formaldehyde. The yield of oxygenates from methane is over 11. The yield increases to over 16 when 0.7% of ethane is added to the gas mixture. The yield of oxygenates from ethane is over 24. A...

  • Cofactor-dependent pathways of formaldehyde oxidation in methylotrophic bacteria. Vorholt, Julia A. // Archives of Microbiology;Oct2002, Vol. 178 Issue 4, p239 

    Methylotrophic bacteria can grow on a number of substrates as energy source with only one carbon atom, such as methanol, methane, methylamine, and dichloromethane. These compounds are metabolized via the cytotoxin formaldehyde. The formaldehyde consumption pathways, especially the pathways for...

  • Formaldehyde. Rangarajan, S. // Chemical Business;Feb2009, Vol. 23 Issue 2, p31 

    The article presents information about formaldehyde, its properties and how it is manufactured. With the molecular formula CH&sub2;O, formaldehyde has various characteristics including flammable, very slightly acidic and comes in either gas or liquid form. The substance is created through the...

  • Formaldehyde.  // Chemical Business;Feb2009, Vol. 23 Issue 2, p36 

    The article presents a discussion about the occurrence of formaldehyde. Considered as the simplest aldehyde, formaldehyde is created by the oxidation or combustion of methane and other carbon compounds. Its existence in interstellar space was discovered in 1969 using the National Radio Astronomy...

  • Separation of emitted and photochemical formaldehyde in Mexico City using a statistical analysis and a new pair of gas-phase tracers. García, A. R.; Volkamer, R.; Molina, L. T.; Molina, M. J.; Samuelson, J.; Mellqvist, J.; Galle, B.; Herndon, S. C.; Kolb, C. E. // Atmospheric Chemistry & Physics Discussions;2005, Vol. 5 Issue 6, p11583 

    Photochemical pollution control strategies require an understanding of photochemical oxidation precursors, making it important to distinguish between primary and secondary sources of HCHO. Estimates for the relative strengths of primary and secondary sources of formaldehyde (HCHO) were obtained...

  • FORMALDEHYDE.  // Chemical Week;6/12/2002, Vol. 164 Issue 24, p32 

    Focuses on the status of the formaldehyde product as of June 2002. Prices of the product in the U.S., Europe and Asia Pacific; Expected worldwide demand for the product; Capacities.

  • Effect of trimethylamine- N -oxide demethylase from lizardfish kidney on biochemical changes of haddock natural actomyosin stored at 4 and −10 °C. Kittima Leelapongwattana; Soottawat Benjakul; Wonnop Visessanguan; Nazlin Howell // European Food Research & Technology;Feb2008, Vol. 226 Issue 4, p833 

    Abstract  The addition of partially purified trimethylamine-N-oxide demethylase (TMAOase) from lizardfish kidney to haddock natural actomyosin (NAM) in the presence of cofactors (FeCl2, ascorbate, and cysteine) accelerated formaldehyde (FA) formation throughout the storage either at 4 or...

  • Reduction of Indoor Formaldehyde Concentrations and Subjective Symptoms in a Gross Anatomy Laboratory. Takigawa, T.; Usami, M.; Yamasaki, Y.; Wang, B.; Sakano, N.; Horike, T.; Kataoka, H.; Ohtsuka, A.; Kira, S. // Bulletin of Environmental Contamination & Toxicology;Jun2005, Vol. 74 Issue 6, p1027 

    The paper measures the indoor formaldehyde concentrations in a gross anatomy laboratory and personal exposure concentrations of medical students during an anatomy dissecting course before and after installing ventilation fans in the laboratory. It also investigates whether the installation...

  • In-cloud processes of methacrolein under simulated conditions - Part 1 : Aqueous phase photooxidation. Liu, Y.; El Haddad, I.; Scarfogliero, M.; Nieto-Gligorovski, L.; Temime-Roussel, B.; Quivet, E.; Marchand, N.; Picquet-Varrault, B.; Monod, A. // Atmospheric Chemistry & Physics Discussions;2009, Vol. 9 Issue 2, p6397 

    The photooxidation of methacrolein was studied in the aqueous phase under simulated cloud droplet conditions. The obtained rate constant of OH-oxidation of methacrolein at 6°C in unbuffered solutions was 5.8 (±0.9)×109 M-1 s-1. This kinetic study showed that the oxidation proceeds...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics