Physicochemical characterisation of different welding aerosols.

18:23 EDT 1st October 2014 | BioPortfolio

Summary of "Physicochemical characterisation of different welding aerosols."

Physicochemical properties important in exposure characterisation of four different welding aerosols were investigated. Particle number size distributions were determined by scanning mobility particle sizer (SMPS), mass size distributions by separation and weighing the individual size fractions of an 11-stage cascade impactor. The size distribution of the primary particles of agglomerates, chemical composition and morphology of the particles were examined by TEM. There were significant differences in the particle number size distributions of the different welding aerosols according to the SMPS determinations. The particle mass size distributions determined gravimetrically were, however, not really different. The dominant range with respect to mass was between 0.1 and 1 μm, regardless of the welding technique. Most of the primary particles in all different welding aerosols had diameters between 5 and 40 nm. All types of primary particles had a tendency to form chainlike agglomerates. A clear size dependence of the particle chemical composition was encountered in the case of manual metal arc welding aerosol. Small particles with diameters below 50 nm were mostly metal oxides in contrast to larger particles which also contained more volatile elements (e.g. potassium, fluorine, sodium, sulphur).

Affiliation

National Institute of Occupational Health, P.O. Box 8149 Dep., 0033, Oslo, Norway, bbe@stami.no.

Journal Details

This article was published in the following journal.

Name: Analytical and bioanalytical chemistry
ISSN: 1618-2650
Pages:

Links

PubMed Articles [867 Associated PubMed Articles listed on BioPortfolio]

Physicochemical and toxicological characteristics of welding fume derived particles generated from real time welding processes.

Welding fume particles have been well studied in the past; however, most studies have examined welding fumes generated from machine models rather than actual exposures. Furthermore, the link between p...

Neurotoxicity following acute inhalation of aerosols generated during resistance spot weld-bonding of carbon steel.

Abstract Welding generates complex metal aerosols, inhalation of which is linked to adverse health effects among welders. An important health concern of welding fume (WF) exposure is neurological dysf...

Synergistically enhanced stability of highly flexible silver nanowire/carbon nanotube hybrid transparent electrodes by plasmonic welding.

Here, we report highly transparent and flexible AgNW/SWCNT hybrid networks on PET substrates combined with plasmonic welding for securing ultrahigh stability in mechanical and electrical properties un...

Laser welding and syncristallization techniques comparison: "Ex vivo" study.

Background and aims: Stabilization of implant abutments through electric impulses at high voltage for a very short time (electrowelding) was developed in the Eighties. In 2009, the same procedure was ...

Gingiva Laser Welding: Preliminary Study on an Ex Vivo Porcine Model.

Abstract Objective: The use of lasers to fuse different tissues has been studied for 50 years. As none of these experiments concerned the oral soft tissues, our objective was to assess the feasibility...

Clinical Trials [20 Associated Clinical Trials listed on BioPortfolio]

Source Profiling of Biohazardous Aerosols in Hospitals

To characterise the physical parameters (number concentration, size distribution and their trajectories) of aerosols (droplets) generated in high risk procedures.

STACCATO: Stent sTrut Apposition and Coverage in Coronary ArTeries: an Optical Coherence Tomography (OCT) Study

Assessment of vessel healing after DES implantation in STEMI, NSTEMI and stable/unstable angina patients: a randomized comparison between everolimus and biolimus A9-eluting stents: an opti...

Renalof in the Dissolution of Renal Calculi in Patients With Recurrent Calcic Lithiasis

The purpose of this study is to determine whether Renalof administration promotes partial or total dissolution of urinary calculi and improves physicochemical parameters and metabolic acti...

Detection and Characterisation of Varicella Zoster Virus From Dermal Lesions of Chickenpox-Infected Patients

This study is conducted in order to collect clinical samples from patients who are diagnosed of having chickenpox infection. The results of this study will provide basic scientific informa...

Characterisation of Fractionated Electrograms Critical for Maintenance of Atrial Fibrillation (AF)

The purpose of this study is to characterise which fractionated electrogram morphologies are important to target in the catheter ablation of atrial fibrillation.

Medical and Biotech [MESH] Definitions

A form of pneumoconiosis resulting from inhalation of iron in the mining dust or welding fumes.

Physical reactions involved in the formation of or changes in the structure of atoms and molecules and their interactions.

Colloids with a gaseous dispersing phase and either liquid (fog) or solid (smoke) dispersed phase; used in fumigation or in inhalation therapy; may contain propellant agents.

The physical phenomena describing the structure and properties of atoms and molecules, and their reaction and interaction processes.

Search BioPortfolio:
Loading
Advertisement
Advertisement