scholarly journals Synthetic fragrances perfume lake sediments | News Briefs: Lead paint in Asia ` TCE risk assessment ` Pesticides in children ` Biofuels require subsidies | New consequences of household pesticides | Fungi partly disarm asbestos | "Fruit farmers, florists, and clockmakers"

2006 ◽  
Vol 40 (18) ◽  
pp. 5588-5592
Author(s):  
Janet Pelley ◽  
Paul D. Thacker ◽  
Naomi Lubick
Keyword(s):  
Risk Assessment ◽  
Lake Sediments ◽  
Lead Paint ◽  
Household Pesticides

scholarly journals The current status of heavy metal in lake sediments from China: Pollution and ecological risk assessment

2017 ◽  
Vol 7 (14) ◽  
pp. 5454-5466 ◽  
Author(s):  
Yongfeng Xu ◽  
Yi Wu ◽  
Jiangang Han ◽  
Pingping Li
Keyword(s):  
Risk Assessment ◽  
Heavy Metal ◽  
Lake Sediments ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Current Status

Occurrence of widely used organic UV filters in lake and river sediments

2012 ◽  
Vol 9 (2) ◽  
pp. 139 ◽  
Author(s):  
Dominic Kaiser ◽  
Olaf Wappelhorst ◽  
Matthias Oetken ◽  
Jörg Oehlmann
Keyword(s):  
Risk Assessment ◽  
Lake Sediments ◽  
Sediment Sample ◽  
Aquatic Environment ◽  
River Sediments ◽  
Freshwater Ecosystems ◽  
Gas Chromatography Mass Spectrometry ◽  
Uv Filters ◽  
Uv Filter ◽  
Organic Uv Filters

Environmental contextPersonal care products containing organic chemicals to filter the sun’s UV rays are produced and used on a broad scale worldwide. Consequently, these organic UV filters are now widespread in the environment. We investigate the occurrence of seven common organic UV filters in river and lake sediments thereby providing valuable data for the future environmental risk assessment of these chemicals to the benthic community of freshwater ecosystems. AbstractPersonal care products (PCPs) are produced and used in huge amounts. These formulations are permanently introduced into the aquatic environment during regular use, mainly through municipal sewage treatment plants. Although there is increasing concern about PCP residues in the aquatic environment, little is known about the extent and level of contamination. The occurrence and concentrations of the seven most frequently used ultraviolet (UV) filters in river and lake sediments have been investigated over a 6-month period by gas chromatography–mass spectrometry: benzophenone-3 (BP-3), 3-benzyliden camphor (3-BC), butyl-methoxydibenzoylmethane (B-MDM), ethylhexyl dimethyl p-aminobenzoic acid (ED-PABA), ethylhexyl-methoxycinnamate (EHMC), 3′-(4′-methylbenzyliden)camphor (4-MBC) and octocrylene (OCR). B-MDM, EHMC and OCR were identified as major contaminants. They were present in every sediment sample with maximum concentrations of 62.2, 6.8 and 642 µg kg–1. 3-BC and ED-PABA could not be detected in any sediment sample. The temporal distribution profile and concentrations of UV filters differed between lakes and rivers. Whereas concentrations of all UV filters in river sediments were low and constant over time, lake sediments exhibited high UV-filter levels during summer and concentrations dropped in autumn. These findings support risk assessment activities and contribute to a better understanding of the magnitude of contamination with organic UV-filter substances in aquatic ecosystems.

Risk assessment in dentistry

1998 ◽  
Vol 62 (10) ◽  
pp. 756-761 ◽  
Author(s):  
CW Douglass
Keyword(s):  
Risk Assessment
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