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Control of exposure to hexavalent chromium concentration in shielded metal arc welding fumes by nano-coating of electrodes
Background: Cr(VI) is a suspected human carcinogen formed as a by-product of stainless steel welding. Nano-alumina and nano-titania coating of electrodes reduced the welding fume levels. Objective: To investigate the effect of nano-coating of welding electrodes on Cr(VI) formation rate (Cr(VI) FR) from a shielded metal arc welding process. Methods: The core welding wires were coated with nano-alumina and nano-titania using the sol-gel dip coating technique. Bead-on plate welds were deposited on SS 316 LN plates kept inside a fume test chamber. Cr(VI) analysis was done using an atomic absorption...
Biomarkers for Lung Epithelium Injury in Occupational Hexavalent Chromium-Exposed Workers
Objective: To evaluate whether Club (Clara) cell protein (CC16) and surfactant-associated protein D (SP-D) can be used as biomarkers for lung injury caused by chromium exposure. Methods: The concentrations of chromium in the air (CrA), chromium in the blood (CrB), lung function, CC16, SP-D, tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6) were detected in 91 chromium-exposed workers and 38 controls. Results: In chromium-exposed group, the levels of CrA, CrB, SP-D, TNF-α, and IL-6 were significantly higher, whereas forced expiratory volume in one second (FEV1), FEV1/FVC...
Exposure to carcinogens in surface engineering
Supplementary report This report details work undertaken following HSE research published as RR963 Exposure to hexavalent chromium, nickel and cadmium compounds in the electroplating industry (Keen et al, 2013). This examined the use of biological monitoring (BM) in the surface engineering (electroplating) industry. The report examines the efficacy of gloves, the use of surfactants and local exhaust ventilation in chromium plating, and the potential for transfer of contaminants outside the workplace. Source:
Exposure to hexavalent chromium, nickel and cadmium compounds in the electroplating industry - RR963
This research was conducted by HSE in partnership with the Surface Engineering Association (SEA). The aim was to investigate whether repeat Biological Monitoring (BM) over a period of time could be used to help drive sustainable improvements in exposure control. Fifty-three companies engaged in nickel, hexavalent chromium and/or cadmium electroplating were visited. An occupational hygiene assessment of relevant tasks and exposure controls was conducted at each visit. BM (post shift urine sampling) was used to quantitatively assess nickel, chromium and (where used) cadmium exposures. Other measurements...
Comparative Emissions of Random Orbital Sanding between Conventional and Self-Generated Vacuum Systems
Conventional abrasive sanding generates high concentrations of particles. Depending on the substrate being abraded and exposure duration, overexposure to the particles can cause negative health effects ranging from respiratory irritation to cancer. The goal of this study was to understand the differences in particle emissions between a conventional random orbital sanding system and a self-generated vacuum random orbital sanding system with attached particle filtration bag. Particle concentrations were sampled for each system in a controlled test chamber for oak wood, chromate painted (hexavalent...
A small survey of exposure to stainless steel welding fume
Specific aims and objectives for the project were to visit a representative group of workplaces carrying out welding of stainless steel, scoping the various control strategies proposed in COSHH Essentials for welding, hot work and allied processes. Source :

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