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RISS 인기검색어
- 검색키워드
- 저자 : Smolders, Erik (검색결과 3 건)
- 무료
- 기관 내 무료
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MEMBRANE PROCESSES IN ENVIRONMENTAL TECHNOLOGY
Blume I.,Smolders C.A. 한국막학회 1992 멤브레인 Vol.2 No.1
Classical membrane processes like microfiltration (MF), ultrafiltration (UF) and reverse osmosis (RO) are being applied in the last years more frequently in environmental and effluent process problems. Newer technologies and developments like pervaporation (PV) and gas sepaxation (GS) recently found commercial applications in the treatment of waste waters and gas streams. The incentive here is either the clean-up from organic components to comply with federal emission regulations or the recovery of the organics for economical reasons. Processes still in their development stage are combinations of chemical reactions with membrane processes to separate and treat SOx and NOx laden waste gas streams in the clean-up of stack-gases. In this paper we will first give a short overview of the more recent developments in MF, UF and RO. This is followed by a closer look on newer technologies applied in environmental problems. The applications looked at are the recovery of organic components from solvent laden gas streams and the separation of organic volatiles from aqueous waste waters via pervaporation. Technical solutions, the advantages and disadvantages of the processes and. where possible, cost estimations will be presented.
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Occupational Exposure to Metals in Shooting Ranges: A Biomonitoring Study
Vandebroek, Eline,Haufroid, Vincent,Smolders, Erik,Hons, Luc,Nemery, Benoit Occupational Safety and Health Research Institute 2019 Safety and health at work Vol.10 No.1
Background: Lead (Pb) exposure in shooting ranges has been reduced by various measures such as jacketed ammunition and lead-free primers. Nevertheless, this may lead to exposure to other metals, potentially resulting in adverse health effects. Methods: In a cross-sectional study, 35 subjects from seven different shooting ranges were studied: four shooting instructors, 10 police officers, 15 Special Forces, and six maintenance staff members. Metals and metalloids were determined in blood and urine by inductively coupled plasma-mass spectrometry. Results: The concentrations of most elements did not differ significantly between groups or compared to reference values, except for Sb and Pt in urine and Pb in blood. Mean values for Sb were considerably higher in urine from the Special Forces ($0.34{\mu}g/L$), the maintenance staff ($0.13{\mu}g/L$), and shooting instructors ($0.32{\mu}g/L$) compared to the police officers before shooting ($0.06{\mu}g/L$) and a Belgian reference value ($0.04{\mu}g/L$). For Pt, the Special Forces showed higher mean urinary concentrations ($0.078{\mu}g/L$) compared to a Belgian reference value (<$0.061{\mu}g/L$). Mean values for blood lead were markedly higher in the Special Forces ($3.9{\mu}g/dL$), maintenance staff ($5.7{\mu}g/dL$), and instructors ($11.7{\mu}g/dL$) compared to police officers ($1.4{\mu}g/dL$). One instructor exceeded the biological exposure index for blood Pb ($38.8{\mu}g/dL$). Conclusion: Since both Pb and Sb were found to be higher in shooting range employees, especially among frequent shooters, it is advisable to provide appropriate protective equipment, education, and medical follow-up for shooting range personnel in addition to careful choice of ammunition.
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Occupational Exposure to Metals in Shooting Ranges: A Biomonitoring Study
Eline Vandebroek,Vincent Haufroid,Erik Smolders,Luc Hons,Benoit Nemery 한국산업안전보건공단 산업안전보건연구원 2019 Safety and health at work Vol.10 No.1
Background: Lead (Pb) exposure in shooting ranges has been reduced by various measures such as jacketed ammunition and lead-free primers. Nevertheless, this may lead to exposure to other metals, potentially resulting in adverse health effects. Methods: In a cross-sectional study, 35 subjects from seven different shooting ranges were studied: four shooting instructors, 10 police officers, 15 Special Forces, and six maintenance staff members. Metals and metalloids were determined in blood and urine by inductively coupled plasmaemass spectrometry. Results: The concentrations of most elements did not differ significantly between groups or compared to reference values, except for Sb and Pt in urine and Pb in blood. Mean values for Sb were considerably higher in urine from the Special Forces (0.34 mg/L), the maintenance staff (0.13 mg/L), and shooting instructors (0.32 mg/L) compared to the police officers before shooting (0.06 mg/L) and a Belgian reference value (0.04 mg/L). For Pt, the Special Forces showed higher mean urinary concentrations (0.078 mg/L) compared to a Belgian reference value (<0.061 mg/L). Mean values for blood lead were markedly higher in the Special Forces (3.9 mg/dL), maintenance staff (5.7 mg/dL), and instructors (11.7 mg/dL) compared to police officers (1.4 mg/dL). One instructor exceeded the biological exposure index for blood Pb (38.8 mg/ dL). Conclusion: Since both Pb and Sb were found to be higher in shooting range employees, especially among frequent shooters, it is advisable to provide appropriate protective equipment, education, and medical follow-up for shooting range personnel in addition to careful choice of ammunition.
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