The Experts below are selected from a list of 1116 Experts worldwide ranked by ideXlab platform
John A Bowden - One of the best experts on this subject based on the ideXlab platform.
-
per and polyfluoroalkyl substances pfas in plasma of the west indian manatee trichechus manatus
Marine Pollution Bulletin, 2019Co-Authors: Kady Palmer, Robert K Bonde, Jacqueline T Bangma, Jessica L Reiner, Jeffrey E Korte, Ashley S P Boggs, John A BowdenAbstract:Abstract Per- and polyfluoroalkyl substances (PFAS) are ubiquitous, synthetic anthropogenic chemicals known to infiltrate and persist in biological systems as a result of their stability and bioaccumulation potential. This study investigated 15 PFAS, including short-chain carboxylic and sulfonic Acids, and their presence in a threatened herbivore, the West Indian manatee (Trichechus manatus). Seven of the 15 PFAS examined were detected in manatee plasma. Perfluorooctanesulfonic Acid (PFOS) (ranging from 0.13 to 166 ng/g ww) and perfluorononanoic Acid (PFNA) (ranging from 0.038 to 3.52 ng/g ww) were detected in every manatee plasma sample examined (n = 69), with differing medians across sampling sites in Florida, Crystal River (n = 39), Brevard County (n = 18), Everglades National Park (n = 8), and four samples (n = 4) from Puerto Rico. With an herbivorous diet and long life-span, the manatee provides a new perspective to monitoring PFAS contamination.
-
Per- and polyfluoroalkyl substances (PFAS) in plasma of the West Indian manatee (Trichechus manatus)
Marine Pollution Bulletin, 2019Co-Authors: Kady Palmer, Robert K Bonde, Jacqueline T Bangma, Jessica L Reiner, Jeffrey E Korte, Ashley S P Boggs, John A BowdenAbstract:Abstract Per- and polyfluoroalkyl substances (PFAS) are ubiquitous, synthetic anthropogenic chemicals known to infiltrate and persist in biological systems as a result of their stability and bioaccumulation potential. This study investigated 15 PFAS, including short-chain carboxylic and sulfonic Acids, and their presence in a threatened herbivore, the West Indian manatee (Trichechus manatus). Seven of the 15 PFAS examined were detected in manatee plasma. Perfluorooctanesulfonic Acid (PFOS) (ranging from 0.13 to 166 ng/g ww) and perfluorononanoic Acid (PFNA) (ranging from 0.038 to 3.52 ng/g ww) were detected in every manatee plasma sample examined (n = 69), with differing medians across sampling sites in Florida, Crystal River (n = 39), Brevard County (n = 18), Everglades National Park (n = 8), and four samples (n = 4) from Puerto Rico. With an herbivorous diet and long life-span, the manatee provides a new perspective to monitoring PFAS contamination.
Kady Palmer - One of the best experts on this subject based on the ideXlab platform.
-
per and polyfluoroalkyl substances pfas in plasma of the west indian manatee trichechus manatus
Marine Pollution Bulletin, 2019Co-Authors: Kady Palmer, Robert K Bonde, Jacqueline T Bangma, Jessica L Reiner, Jeffrey E Korte, Ashley S P Boggs, John A BowdenAbstract:Abstract Per- and polyfluoroalkyl substances (PFAS) are ubiquitous, synthetic anthropogenic chemicals known to infiltrate and persist in biological systems as a result of their stability and bioaccumulation potential. This study investigated 15 PFAS, including short-chain carboxylic and sulfonic Acids, and their presence in a threatened herbivore, the West Indian manatee (Trichechus manatus). Seven of the 15 PFAS examined were detected in manatee plasma. Perfluorooctanesulfonic Acid (PFOS) (ranging from 0.13 to 166 ng/g ww) and perfluorononanoic Acid (PFNA) (ranging from 0.038 to 3.52 ng/g ww) were detected in every manatee plasma sample examined (n = 69), with differing medians across sampling sites in Florida, Crystal River (n = 39), Brevard County (n = 18), Everglades National Park (n = 8), and four samples (n = 4) from Puerto Rico. With an herbivorous diet and long life-span, the manatee provides a new perspective to monitoring PFAS contamination.
-
Per- and polyfluoroalkyl substances (PFAS) in plasma of the West Indian manatee (Trichechus manatus)
Marine Pollution Bulletin, 2019Co-Authors: Kady Palmer, Robert K Bonde, Jacqueline T Bangma, Jessica L Reiner, Jeffrey E Korte, Ashley S P Boggs, John A BowdenAbstract:Abstract Per- and polyfluoroalkyl substances (PFAS) are ubiquitous, synthetic anthropogenic chemicals known to infiltrate and persist in biological systems as a result of their stability and bioaccumulation potential. This study investigated 15 PFAS, including short-chain carboxylic and sulfonic Acids, and their presence in a threatened herbivore, the West Indian manatee (Trichechus manatus). Seven of the 15 PFAS examined were detected in manatee plasma. Perfluorooctanesulfonic Acid (PFOS) (ranging from 0.13 to 166 ng/g ww) and perfluorononanoic Acid (PFNA) (ranging from 0.038 to 3.52 ng/g ww) were detected in every manatee plasma sample examined (n = 69), with differing medians across sampling sites in Florida, Crystal River (n = 39), Brevard County (n = 18), Everglades National Park (n = 8), and four samples (n = 4) from Puerto Rico. With an herbivorous diet and long life-span, the manatee provides a new perspective to monitoring PFAS contamination.
Jin Hyo Kim - One of the best experts on this subject based on the ideXlab platform.
-
environmental and dietary exposure of perfluorooctanoic Acid and Perfluorooctanesulfonic Acid in the nakdong river korea
Environmental Geochemistry and Health, 2021Co-Authors: Geun-hyoung Choi, Deuk-yeong Lee, Ah-reum Song, Hyo-sub Lee, Sang-won Park, Jin-hwan Lee, David Megson, Pennante Brucevanderpuije, Jin Hyo KimAbstract:This study performed the first environmental and dietary exposure assessment to explore plant uptake of perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) from agricultural soil and irrigation water in the Nakdong River delta, South Korea. Annual average concentrations of total PFOA and PFOS ranged from 0.026 to 0.112 µg L−1 (irrigation water), and from 0.818 to 1.364 µg kg−1 (soil), respectively. PFOA and PFOS hotspots were identified downstream of the Nakdong River and were influenced by seasonal climatic variations. The observed average biennial concentration of the sum of PFOA and PFOS decreased in irrigation water, from 0.112 µg L−1 in 2013 to 0.026 µg L−1 in 2015, suggests that the 2013 Persistent Organic Pollutants Control Act may have helped to reduce levels of PFAS at this location. This study calculated some of the highest plant uptake factors reported to date, with values ranging from 0.962 in green onions to < 0.004 in plums. Leafy vegetables and rice are important components of the Korean diet; these groups had the largest contribution to the estimated dietary intake of PFOA and PFOS, which was calculated at 0.449 and 0.140 ng kg −1bw day−1, respectively. This corresponded to 66.4% for PFOA and 7.9% for PFOS of the EFSA reference dose (RfD). The dietary intake of PFOA and PFOS from crops alone did not exceed the RfD. However, when the estimated daily intake (EDI) from other sources such as tap water, meat, fish, dairy, and beverages was included in the exposure risk assessment, both of the EDIs to PFOA and PFOS exceeded the RfDs, indicating that there may be a risk to human health. This study concludes that consumption of crops might, therefore, be a significant and underappreciated pathway for human exposure to PFAS.
-
Environmental and dietary exposure of perfluorooctanoic Acid and Perfluorooctanesulfonic Acid in the Nakdong River, Korea
Environmental Geochemistry and Health, 2021Co-Authors: Geun-hyoung Choi, Deuk-yeong Lee, Pennante Bruce-vanderpuije, Ah-reum Song, Hyo-sub Lee, Sang-won Park, Jin-hwan Lee, David Megson, Jin Hyo KimAbstract:This study performed the first environmental and dietary exposure assessment to explore plant uptake of perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) from agricultural soil and irrigation water in the Nakdong River delta, South Korea. Annual average concentrations of total PFOA and PFOS ranged from 0.026 to 0.112 µg L^−1 (irrigation water), and from 0.818 to 1.364 µg kg^−1 (soil), respectively. PFOA and PFOS hotspots were identified downstream of the Nakdong River and were influenced by seasonal climatic variations. The observed average biennial concentration of the sum of PFOA and PFOS decreased in irrigation water, from 0.112 µg L^−1 in 2013 to 0.026 µg L^−1 in 2015, suggests that the 2013 Persistent Organic Pollutants Control Act may have helped to reduce levels of PFAS at this location. This study calculated some of the highest plant uptake factors reported to date, with values ranging from 0.962 in green onions to
-
Perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) concentrations in the South Korean agricultural environment: a national survey.
Journal of Integrative Agriculture, 2017Co-Authors: Geun-hyoung Choi, Byung Jun Park, Deuk-young Lee, Dong-kyu Jeong, Saranya Kuppusamy, Yong Bok Lee, Jin Hyo KimAbstract:Abstract Research on the occurrence of perfluorochemicals (PFCs) such as Perfluorooctanesulfonic Acid (PFOS) and perfluorooctanoic Acid (PFOA) in the agricultural environment is lacking, in spite of their potential risk via food chain transfer from aquatic and soil-plant systems to animals and/or humans. In the present study, for the first time, soil and water samples collected from 243 different agricultural sites adjacent to waste water treatment plants (WWTPs) belonging to 81 cities and 5 provinces with different levels of industrialization in South Korea were monitored for concentrations of PFOS and PFOA by use of solid phase extraction and liquid chromatography-tandem mass spectroscopy (LC-MS/MS). Significant mean concentrations of PFOA (0.001–0.007 µg L −1 water and −1 soil) and PFOS (0.001–0.22 µg L −1 water and −1 soil) were found in all samples. Concentrations of PFCs in soils were high, highlighting that soil is an important sink for PFCs in the agricultural environment. Samples from near WWTPs in Gyeongsang Province contained the highest concentrations of PFOS and PFOA, reflecting the concentration of heavy industry in the province. The concentrations of PFCs in agricultural water (most samples −1 ) and soils (most samples −1 ) from South Korea were less than acceptable guideline values, indicating that South Korea is not a hotspot of PFOS and PFOA contamination and that there is negligible risk to human and ecological health from these chemicals. However, further studies investigating the seasonal variation in PFOA, PFOS and other perfluorochemical concentrations in the agricultural environment are needed.
-
Residual perfluorochemicals in the biochar from sewage sludge
Chemosphere, 2015Co-Authors: Jin Hyo Kim, Geun-hyoung Choi, Yong Sik Ok, Byung Jun ParkAbstract:Biochar has been recently considered as a candidate for soil amendment and soil remediation. Some pollutants have been screened in the biochar for safety purposes except for perfluorochemicals (PFCs). In this study, the contamination of biochars from plant residues and sewage sludge with Perfluorooctanesulfonic Acid (PFOS) and perfluorooctanoic Acid (PFOA) was examined. The total residual concentrations of PFOA and PFOS in the sludge biochar were 15.8-16.9. ng/g and these values did not decrease significantly after pyrolysis. On the other hand, these PFCs were not found in the biochar from plant sources. In conclusion, the use of the sludge biochar in the agricultural environment should be re-evaluated, since the concentrations of PFCs in the sewage sludge showed no significant decrease after thermal process.
Wulf Amelung - One of the best experts on this subject based on the ideXlab platform.
-
Dose-dependent reactions of Aporrectodea caliginosa to perfluorooctanoic Acid and Perfluorooctanesulfonic Acid in soil
Ecotoxicology and environmental safety, 2013Co-Authors: Parva Zareitalabad, Jan Siemens, Florian Wichern, Wulf Amelung, Rainer Georg JoergensenAbstract:Abstract As a consequence of their widespread use, e.g. as protective coatings for fabrics, and their resistance to thermal and biological breakdown, perfluorinated compounds are increasingly found in the environment, but little is known about their ecotoxicological properties. A 40-day microcosm experiment was carried out to examine the effects of perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) on the endogeic geophagus earthworm Aporrectodea caliginosa, its survival and feeding on soil organic C and microbial biomass C. Three levels of concentration (1, 100, and 500 mg kg−1) were chosen. The lowest represented the maximum found in sediments and soils and the other two are extreme concentrations that might occur in pollution hotspots and that have been shown to poison organisms. Earthworms promoted the production of CO2 and decreased microbial biomass C in soil, regardless of the presence of PFOA or PFOS. Both compounds significantly decreased the surviving numbers and dry weight of earthworms at concentrations of 100 mg kg−1. No earthworms survived at PFOA and PFOS concentrations of 500 mg kg−1. At concentrations of 1 mg kg−1, no negative effects were observed. The δ13C values of A. caliginosa did not differ between treatments. In contrast, the δ15N values were significantly increased after adding 1 mg kg−1 of PFOA, reflecting elevated portions of soil-derived N in the earthworm tissue. In contrast, these portions of soil-derived N were lower in the earthworms after addition of 100 mg kg−1 of PFOA and PFOS. In conclusion, extreme concentrations of PFOA and PFOS negatively affected endogeic A. caliginosa, whereas a concentration of 1 mg kg−1 of PFOA and PFOS was related to an increased uptake of soil N by the earthworms.
-
perfluorooctanoic Acid pfoa and Perfluorooctanesulfonic Acid pfos in surface waters sediments soils and wastewater a review on concentrations and distribution coefficients
Chemosphere, 2013Co-Authors: P Zareitalabad, Jan Siemens, Wulf Amelung, M HamerAbstract:Abstract The sorption of perfluorinated compounds (PFCs) to soils and sediments determines their fate and distribution in the environment, but there is little consensus regarding distribution coefficients that should be used for assessing the environmental fate of these compounds. Here we reviewed sorption coefficients for PFCs derived from laboratory experiments and compared these values with the gross distribution between the concentrations of PFCs in surface waters and sediments or between wastewater and sewage sludge. Sorption experiments with Perfluorooctanesulfonic Acid (PFOS) and perfluorooctanoic Acid (PFOA) suggest that their sorption can be described reasonably well as a partitioning-like process with an average log K oc of approximately 2.8 for PFOA and 3.0 for PFOS. However, median concentrations in sediments (PFOA, 0.27 ng g −1 ; PFOS, 0.54 ng g −1 ) or sewage sludge (PFOA, 37 ng g −1 ; PFOS, 69 ng g −1 ) in relation to median concentrations in surface water (PFOA, 3 ng l −1 ; PFOS, 3 ng l −1 ) or wastewater treatment effluent (PFOA, 24 ng l −1 ; PFOS, 11 ng l −1 ), suggest that effective log K oc distribution coefficients for the field situation may be close to 3.7 for PFOA and 4.2 for PFOS. Applying lab-based log K oc distribution coefficients can therefore result in a serious overestimation of PFC concentrations in water and in turn to an underestimation of the residence time of PFOA and PFOS in contaminated soils. Irrespective of the dissipation kinetics, the majority of PFOA and PFOS from contaminated soils will be transported to groundwater and surface water bodies.
Robert K Bonde - One of the best experts on this subject based on the ideXlab platform.
-
per and polyfluoroalkyl substances pfas in plasma of the west indian manatee trichechus manatus
Marine Pollution Bulletin, 2019Co-Authors: Kady Palmer, Robert K Bonde, Jacqueline T Bangma, Jessica L Reiner, Jeffrey E Korte, Ashley S P Boggs, John A BowdenAbstract:Abstract Per- and polyfluoroalkyl substances (PFAS) are ubiquitous, synthetic anthropogenic chemicals known to infiltrate and persist in biological systems as a result of their stability and bioaccumulation potential. This study investigated 15 PFAS, including short-chain carboxylic and sulfonic Acids, and their presence in a threatened herbivore, the West Indian manatee (Trichechus manatus). Seven of the 15 PFAS examined were detected in manatee plasma. Perfluorooctanesulfonic Acid (PFOS) (ranging from 0.13 to 166 ng/g ww) and perfluorononanoic Acid (PFNA) (ranging from 0.038 to 3.52 ng/g ww) were detected in every manatee plasma sample examined (n = 69), with differing medians across sampling sites in Florida, Crystal River (n = 39), Brevard County (n = 18), Everglades National Park (n = 8), and four samples (n = 4) from Puerto Rico. With an herbivorous diet and long life-span, the manatee provides a new perspective to monitoring PFAS contamination.
-
Per- and polyfluoroalkyl substances (PFAS) in plasma of the West Indian manatee (Trichechus manatus)
Marine Pollution Bulletin, 2019Co-Authors: Kady Palmer, Robert K Bonde, Jacqueline T Bangma, Jessica L Reiner, Jeffrey E Korte, Ashley S P Boggs, John A BowdenAbstract:Abstract Per- and polyfluoroalkyl substances (PFAS) are ubiquitous, synthetic anthropogenic chemicals known to infiltrate and persist in biological systems as a result of their stability and bioaccumulation potential. This study investigated 15 PFAS, including short-chain carboxylic and sulfonic Acids, and their presence in a threatened herbivore, the West Indian manatee (Trichechus manatus). Seven of the 15 PFAS examined were detected in manatee plasma. Perfluorooctanesulfonic Acid (PFOS) (ranging from 0.13 to 166 ng/g ww) and perfluorononanoic Acid (PFNA) (ranging from 0.038 to 3.52 ng/g ww) were detected in every manatee plasma sample examined (n = 69), with differing medians across sampling sites in Florida, Crystal River (n = 39), Brevard County (n = 18), Everglades National Park (n = 8), and four samples (n = 4) from Puerto Rico. With an herbivorous diet and long life-span, the manatee provides a new perspective to monitoring PFAS contamination.