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Zhang L, Zhang Y, Chen P, Du W, Feng X, Liu BF. Paraffin Oil Based Soft-Template Approach to Fabricate Reusable Porous PDMS Sponge for Effective Oil/Water Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:11123-11131. [PMID: 31369286 DOI: 10.1021/acs.langmuir.9b01861] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Three-dimensional porous material holds enormous potential in the field of life science and environmental protection. In this work, we proposed a facile route for the large-scale synthesis of porous poly(dimethylsiloxane) (PDMS) sponge via paraffin oil based emulsion technique. A stable emulsion could be formed by emulsifying water in the PDMS solution with the aid of paraffin oil. Moreover, the amount of emulsified water in 5 g of PDMS solution is as high as 35 g, and the skeleton of the prepared PDMS sponge is still in intact. This method is cost-effective, rapid, and easily scaled up. The water contact angle of the obtained PDMS sponge is 141.9 ± 1°, and the absorption capacities of the sponges are 13.5-33.3 g g-1 for various organic solvents. The PDMS sponge only needed 0.069 MPa force to realize the compression ratio of 90%, which it still maintained after over 50 cycles of compression. In addition, the porous PDMS sponge exhibited an excellent oil absorption and an outstanding reusability, which were potentially useful in water purification.
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Affiliation(s)
- Leicheng Zhang
- The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Yifang Zhang
- The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Peng Chen
- The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Wei Du
- The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Xiaojun Feng
- The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Bi-Feng Liu
- The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China
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52
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Gilmour ME, Holmes ND, Fleishman AB, Kriwoken LK. Temporal and interspecific variation in feather mercury in four penguin species from Macquarie Island, Australia. MARINE POLLUTION BULLETIN 2019; 142:282-289. [PMID: 31232305 DOI: 10.1016/j.marpolbul.2019.03.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/23/2019] [Accepted: 03/26/2019] [Indexed: 06/09/2023]
Abstract
We measured mercury (Hg) concentrations in feathers from four penguin species collected on Macquarie Island, Southern Ocean, to 1) establish baseline Hg concentrations; and 2) compare Hg from samples collected in 2002 ("modern") and from museum specimens collected between 1937 and 1976 ("historic"). Inter-specific differences in feather Hg reflected known differences in habitats and diversity of diets: benthic-foraging Gentoo penguins and Rockhopper penguins that foraged both inshore and offshore had significantly higher feather mercury than the more pelagic, specialist foraging King and Royal penguins. Hg significantly decreased between historic and modern samples in King and Royal penguins. This decrease could be due to changes in either diet, foodwebs, or atmospheric Hg input and sources in the Southern Hemisphere. Because Macquarie Island is home to 2.8 million marine animals, these data may indicate that other species that forage and breed in this region are also exposed to low Hg concentrations in this environment.
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Affiliation(s)
- M E Gilmour
- Ocean Sciences Dept., University of California, Santa Cruz, Santa Cruz 95060, CA, USA.
| | - N D Holmes
- School of Geography and Environmental Studies, University of Tasmania, Hobart, TAS, Australia 7001; Island Conservation, 2100 Delaware Ave., Santa Cruz 95060, CA, USA
| | - A B Fleishman
- Conservation Metrics, Inc., 145 McAllister Way, Santa Cruz 95060, CA, USA
| | - L K Kriwoken
- School of Geography and Environmental Studies, University of Tasmania, Hobart, TAS, Australia 7001
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53
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Huang J, Hu J, Shi Y, Zeng G, Cheng W, Yu H, Gu Y, Shi L, Yi K. Evaluation of self-cleaning and photocatalytic properties of modified g-C3N4 based PVDF membranes driven by visible light. J Colloid Interface Sci 2019; 541:356-366. [DOI: 10.1016/j.jcis.2019.01.105] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/21/2019] [Accepted: 01/24/2019] [Indexed: 12/12/2022]
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54
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A novel photocatalytic membrane decorated with PDA/RGO/Ag3PO4 for catalytic dye decomposition. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.11.069] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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55
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Guigueno MF, Karouna-Renier NK, Henry PFP, Peters LE, Palace VP, Letcher RJ, Fernie KJ. Sex-specific responses in neuroanatomy of hatchling American kestrels in response to embryonic exposure to the flame retardants bis(2-ethylhexyl)-2,3,4,5-tetrabromophthalate and 2-ethylhexyl-2,3,4,5-tetrabromobenzoate. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:3032-3040. [PMID: 30035332 DOI: 10.1002/etc.4238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/11/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
Bis(2-ethylhexyl)-2,3,4,5-tetrabromophthalate (BEH-TEBP) and 2-ethylhexyl-2,3,4,5-tetrabromobenzoate (EH-TBB), flame retardant components of FireMaster 550® and 600® have been detected in tissues of wild birds. To address the paucity of information regarding potential impacts of flame retardants on the brain, brain volume regions of hatchling American kestrels (Falco sparverius) were evaluated following in ovo injection at embryonic day 5 with safflower oil or to 1 of 3 doses of either BEH-TEBP (12, 60, or 107 ng/g egg) or EH-TBB (11, 55, or 137 ng/g egg). The doses for both chemicals reflected concentrations reported in wild birds. The volumes of the hippocampus and telencephalon and volumetric differences between left and right hemispheres were measured in hatchlings (embryonic day 28). A sex-specific effect of BEH-TEBP on relative hippocampus volume was evident: the hippocampus was significantly enlarged in high-dose females compared to control females but smaller in low-dose females than the other females. There was no significant effect of EH-TBB on hippocampus volume in female kestrel hatchlings or of either chemical in male hatchlings and no effects of these concentrations of EH-TBB or BEH-TEBP on telencephalon volume or the level of symmetry between the hemispheres of the brain. In sum, embryonic exposure of female kestrels to these BEH-TEBP concentrations altered hippocampus volume, having the potential to affect spatial memory relating to ecologically relevant behavior such as prey capture, predator avoidance, and migration. Environ Toxicol Chem 2018;37:3032-3040. © 2018 SETAC.
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Affiliation(s)
- Mélanie F Guigueno
- Ecotoxicology & Wildlife Health Division, Science & Technology Branch, Environment & Climate Change Canada, Burlington, Ontario
- Natural Resource Sciences, McGill University, Ste. Anne de Bellevue, Quebec, Canada
| | | | - Paula F P Henry
- US Geological Survey, Patuxent Wildlife Research Center, Beltsville, Maryland
| | - Lisa E Peters
- Riddell Faculty of Earth Environment and Resources, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Vince P Palace
- International Institute of Sustainable Development-Experimental Lakes Area, Winnipeg, Manitoba, Canada
| | - Robert J Letcher
- Ecotoxicology & Wildlife Health Division, Science & Technology Branch, Environment & Climate Change Canada, Carleton University, Ottawa, Ontario
| | - Kim J Fernie
- Ecotoxicology & Wildlife Health Division, Science & Technology Branch, Environment & Climate Change Canada, Burlington, Ontario
- Natural Resource Sciences, McGill University, Ste. Anne de Bellevue, Quebec, Canada
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56
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Yamashita R, Takada H, Nakazawa A, Takahashi A, Ito M, Yamamoto T, Watanabe YY, Kokubun N, Sato K, Wanless S, Daunt F, Hyrenbach D, Hester M, Deguchi T, Nishizawa B, Shoji A, Watanuki Y. Global Monitoring of Persistent Organic Pollutants (POPs) Using Seabird Preen Gland Oil. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 75:545-556. [PMID: 30232531 DOI: 10.1007/s00244-018-0557-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/03/2018] [Indexed: 05/24/2023]
Abstract
Situated at high positions on marine food webs, seabirds accumulate high concentrations of persistent organic pollutants (POPs), such as polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane and its metabolites (DDTs), and hexachlorocyclohexanes (HCHs). Our previous studies proposed the usefulness of seabirds preen gland oil as a nondestructive biomonitoring tool. The present study applied this approach to 154 adult birds of 24 species collected from 11 locations during 2005-2016 to demonstrate the utility of preen gland oil as a tool for global monitoring POPs, i.e., PCBs, DDTs, and HCHs. Concentrations of the POPs were higher in the Northern Hemisphere than in the Southern Hemisphere. In particular, ∑20PCBs and∑DDTs were highly concentrated in European shags (Phalacrocorax aristotelis) and Japanese cormorants (Phalacrocorax capillatus), explainable by a diet of benthic fishes. Higher concentrations of γ-HCH were detected in species from the polar regions, possibly reflecting the recent exposure and global distillation of ∑HCHs. We examined the relationship between age and POP concentrations in preen gland oil from 20 male European shags, aged 3-16 years old. Concentrations and compositions of POPs were not related to age. We also examined sex differences in the POP concentrations from 24 streaked shearwaters (Calonectris leucomelas) and did not detect a sex bias. These results underline the importance of the geographic concentration patterns and the dietary behavior as determinants species-specific POPs concentrations in preen gland oil.
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Affiliation(s)
- Rei Yamashita
- Laboratory of Organic Geochemistry, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, 183-8509, Japan.
| | - Hideshige Takada
- Laboratory of Organic Geochemistry, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, 183-8509, Japan
| | - Arisa Nakazawa
- Laboratory of Organic Geochemistry, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, 183-8509, Japan
| | - Akinori Takahashi
- Department of Polar Science, National Institute of Polar Research, Graduate University for Advanced Studies, 10-3 Midori-cho, Tachikawa, Tokyo, 190-8528, Japan
| | - Motohiro Ito
- Department of Applied Biosciences, Toyo University, 1-1-1, Izumino, Itakura-machi, Oura, Gunma, 374-0193, Japan
| | - Takashi Yamamoto
- Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601, Japan
| | - Yuuki Y Watanabe
- Department of Polar Science, National Institute of Polar Research, Graduate University for Advanced Studies, 10-3 Midori-cho, Tachikawa, Tokyo, 190-8528, Japan
| | - Nobuo Kokubun
- Department of Polar Science, National Institute of Polar Research, Graduate University for Advanced Studies, 10-3 Midori-cho, Tachikawa, Tokyo, 190-8528, Japan
| | - Katsufumi Sato
- Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5, Kashiwanoha, Chiba, 277-8564, Japan
| | - Sarah Wanless
- Centre for Ecology & Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, UK
| | - Francis Daunt
- Centre for Ecology & Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, UK
| | - David Hyrenbach
- Marine Science Programs at Oceanic Institute, Hawai'i Pacific University, Kalaniana'ole Highway, 41-202, Waimanalo, HI, 96795, USA
| | | | - Tomohiro Deguchi
- Yamashina Institute for Ornithology, 115 Konoyama, Abiko, Chiba, 270-1145, Japan
| | - Bungo Nishizawa
- Faculty of Fisheries, Hokkaido University, 3-1-1 Minato-cho, Hakodate, Hokkaido, 041-8611, Japan
| | - Akiko Shoji
- Faculty of Fisheries, Hokkaido University, 3-1-1 Minato-cho, Hakodate, Hokkaido, 041-8611, Japan
| | - Yutaka Watanuki
- Faculty of Fisheries, Hokkaido University, 3-1-1 Minato-cho, Hakodate, Hokkaido, 041-8611, Japan
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57
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Blévin P, Shaffer SA, Bustamante P, Angelier F, Picard B, Herzke D, Moe B, Gabrielsen GW, Bustnes JO, Chastel O. Organochlorines, perfluoroalkyl substances, mercury, and egg incubation temperature in an Arctic seabird: Insights from data loggers. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:2881-2894. [PMID: 30094864 DOI: 10.1002/etc.4250] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 05/08/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
In birds, incubation-related behaviors and brood patch formation are influenced by hormonal regulation such as prolactin secretion. Brood patch provides efficient heat transfer between the incubating parent and the developing embryo in the egg. Importantly, several environmental contaminants are already known to have adverse effects on avian reproduction. However, relatively little is known about the effect of contaminants on incubation temperature (Tinc ) in wild birds. By using temperature thermistors placed into artificial eggs, we investigated whether the most contaminated parent birds are less able to provide appropriate egg warming and thus less committed to incubating their clutch. Specifically, we investigated the relationships among 3 groups of contaminants (organochlorines, perfluoroalkyl substances [PFASs], and mercury [Hg]) with Tinc and also with prolactin concentrations and brood patch size in incubating Arctic black-legged kittiwakes (Rissa tridactyla). Our results reveal that among the organochlorines considered, only blood levels of oxychlordane, the main metabolite of chlordane, a banned pesticide, were negatively related to the minimum incubation temperature in male kittiwakes. Levels of PFASs and Hg were unrelated to Tinc in kittiwakes. Moreover, our study suggests a possible underlying mechanism: since we reported a significant and negative association between blood oxychlordane concentrations and the size of the brood patch in males. Finally, this reduced Tinc in the most oxychlordane-contaminated kittiwakes was associated with a lower egg hatching probability. Environ Toxicol Chem 2018;37:2881-2894. © 2018 SETAC.
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Affiliation(s)
- Pierre Blévin
- Centre d'Etudes Biologiques de Chizé, UMR 7372-Centre National de la Recherche Scientifique, Université de La Rochelle, Villiers-en-Bois, France
- Littoral Environnement et Sociétés, UMR 7266-Centre National de la Recherche Scientifique, Université de La Rochelle, La Rochelle, France
| | - Scott A Shaffer
- Department of Biological Sciences, San Jose State University, San Jose, California, USA
| | - Paco Bustamante
- Littoral Environnement et Sociétés, UMR 7266-Centre National de la Recherche Scientifique, Université de La Rochelle, La Rochelle, France
| | - Frédéric Angelier
- Centre d'Etudes Biologiques de Chizé, UMR 7372-Centre National de la Recherche Scientifique, Université de La Rochelle, Villiers-en-Bois, France
| | - Baptiste Picard
- Centre d'Etudes Biologiques de Chizé, UMR 7372-Centre National de la Recherche Scientifique, Université de La Rochelle, Villiers-en-Bois, France
| | - Dorte Herzke
- Norwegian Institute for Air Research, Tromsø, Norway
| | - Børge Moe
- Norwegian Institute for Nature Research, Trondheim, Norway
| | | | | | - Olivier Chastel
- Centre d'Etudes Biologiques de Chizé, UMR 7372-Centre National de la Recherche Scientifique, Université de La Rochelle, Villiers-en-Bois, France
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58
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Góngora E, Braune BM, Elliott KH. Nitrogen and sulfur isotopes predict variation in mercury levels in Arctic seabird prey. MARINE POLLUTION BULLETIN 2018; 135:907-914. [PMID: 30301115 DOI: 10.1016/j.marpolbul.2018.07.075] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 07/19/2018] [Accepted: 07/28/2018] [Indexed: 06/08/2023]
Abstract
Mercury (Hg) biotransformation and biomagnification are processes that affect Hg burdens in wildlife. To interpret variation in Hg in seabird eggs, used as Hg bioindicators in the Arctic, it is important to understand how Hg biomagnifies through the food web. We evaluated the use of δ34S, along with other commonly used stable isotope signatures (δ15N and δ13C), for the determination of possible sources of Hg in an Arctic food web (56 individuals of 15 species of fish and invertebrates). Hg correlated with δ34S (R2 = 0.72). When the combined effects of δ34S and δ15N were considered in mixed-effects models, both δ34S and δ15N together described Hg patterns in Arctic food webs better than either isotope alone. Our results demonstrate the usefulness of δ34S to account for variation in Hg among marine animals and to study the possible underlying effects that MeHg production may have on Hg pathways in Arctic ecosystems.
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Affiliation(s)
- Esteban Góngora
- Department of Natural Resource Sciences, McGill University, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue H9X 3V9, Canada.
| | - Birgit M Braune
- Environment and Climate Change Canada, National Wildlife Research Centre, Carleton University, Raven Road, Ottawa K1A 0H3, Canada
| | - Kyle H Elliott
- Department of Natural Resource Sciences, McGill University, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue H9X 3V9, Canada
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Lu Y, Yuan J, Lu X, Su C, Zhang Y, Wang C, Cao X, Li Q, Su J, Ittekkot V, Garbutt RA, Bush S, Fletcher S, Wagey T, Kachur A, Sweijd N. Major threats of pollution and climate change to global coastal ecosystems and enhanced management for sustainability. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 239:670-680. [PMID: 29709838 DOI: 10.1016/j.envpol.2018.04.016] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 04/03/2018] [Accepted: 04/03/2018] [Indexed: 05/21/2023]
Abstract
Coastal zone is of great importance in the provision of various valuable ecosystem services. However, it is also sensitive and vulnerable to environmental changes due to high human populations and interactions between the land and ocean. Major threats of pollution from over enrichment of nutrients, increasing metals and persistent organic pollutants (POPs), and climate change have led to severe ecological degradation in the coastal zone, while few studies have focused on the combined impacts of pollution and climate change on the coastal ecosystems at the global level. A global overview of nutrients, metals, POPs, and major environmental changes due to climate change and their impacts on coastal ecosystems was carried out in this study. Coasts of the Eastern Atlantic and Western Pacific were hotspots of concentrations of several pollutants, and mostly affected by warming climate. These hotspots shared the same features of large populations, heavy industry and (semi-) closed sea. Estimation of coastal ocean capital, integrated management of land-ocean interaction in the coastal zone, enhancement of integrated global observation system, and coastal ecosystem-based management can play effective roles in promoting sustainable management of coastal marine ecosystems. Enhanced management from the perspective of mitigating pollution and climate change was proposed.
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Affiliation(s)
- Yonglong Lu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jingjing Yuan
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaotian Lu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chao Su
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yueqing Zhang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chenchen Wang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xianghui Cao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qifeng Li
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jilan Su
- Second Institute of Oceanography, State Oceanic Administration, Hangzhou, 310012, China
| | | | | | - Simon Bush
- Environmental Policy Group, Wageningen University, Wageningen, 6706 KN, The Netherlands
| | - Stephen Fletcher
- UNEP World Conservation Monitoring Centre, Cambridge, CB3 0DL, UK; Centre for Marine Conservation Policy Research, Plymouth University, Plymouth Devon, PL4 8AA, UK
| | - Tonny Wagey
- Centre for Coastal and Marine Resources Study, Bogor Agricultural University, Bogor, 16680, West Java, Indonesia
| | - Anatolii Kachur
- Pacific Institute of Geography, Far East Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia
| | - Neville Sweijd
- Council for Scientific and Industrial Research (CSIR), Pretoria, 0001, South Africa
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60
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Yu M, Lin B, Chen S, Deng Q, Liu G, Wang Q. Biomimetic fabrication of superhydrophobic loofah sponge: robust for highly efficient oil-water separation in harsh environments. RSC Adv 2018; 8:24297-24304. [PMID: 35539192 PMCID: PMC9082177 DOI: 10.1039/c8ra04336a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 06/05/2018] [Indexed: 01/02/2023] Open
Abstract
Oil/water separation has become an increasingly important field due to frequent industrial oily wastewater emission and crude oil spill accidents. Herein, we fabricate a robust superhydrophobic loofah sponge via a versatile, environmentally friendly, and low-cost dip coating strategy, which involves the modification of commercial loofah sponge with waterborne polyurea and fused SiO2 nanoparticles without the modification of any toxic low-surface-energy compound. The as-prepared loofah sponge showed excellent superhydrophobic/superoleophilic properties and exhibited robustness for effective oil-water separation in extremely harsh environments (such as 1 M HCl, 1 M NaOH, saturated NaCl solution and hot water higher than 95 °C) due to the remarkably high chemical stability. In addition, the as-prepared loofah sponge was capable of excellent anti-fouling, has self-cleaning ability and could act as the absorber for effective separation of surfactant-free oil-in-water emulsions. More importantly, the as-prepared loofah sponge demonstrated remarkable robustness against strong sandpaper abrasion and finger wipes, while retaining its superhydrophobicity and efficient oil/water separation efficiency even after more than 50 abrasion cycles. This facile and green synthesis approach presented here has the advantage of large-scale fabrication of a multifunctional biomass-based adsorbent material as a promising candidate in anti-fouling, self-cleaning, and versatile water-oil separation.
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Affiliation(s)
- Mingguang Yu
- School of Materials Science and Energy Engineering, Foshan University Foshan 528000 China
| | - Binbin Lin
- School of Materials Science and Energy Engineering, Foshan University Foshan 528000 China
| | - Shangxian Chen
- School of Materials Science and Energy Engineering, Foshan University Foshan 528000 China
| | - Qianjun Deng
- School of Materials Science and Energy Engineering, Foshan University Foshan 528000 China
| | - Guang Liu
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture, Guangdong Key Laboratory of Agricultural Products Processing Guangzhou 510610 China
| | - Qing Wang
- State Key Laboratory of Pulp & Paper Engineering, South China University of Technology Guangzhou 510640 China
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Einoder LD, MacLeod CK, Coughanowr C. Metal and Isotope Analysis of Bird Feathers in a Contaminated Estuary Reveals Bioaccumulation, Biomagnification, and Potential Toxic Effects. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 75:96-110. [PMID: 29730716 DOI: 10.1007/s00244-018-0532-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 04/25/2018] [Indexed: 06/08/2023]
Abstract
The Derwent estuary, in south east Tasmania, is highly contaminated with heavy metals, mainly due to past industrial pollution. This study sought to determine the extent of contamination, bioaccumulation, and biomagnification in the resident bird community and therefore to infer the potential for adverse effects in birds. Thirteen metals were measured from breast feathers (n = 51 individuals) of eight sympatric species of aquatic bird. Stable carbon (δ13C) and nitrogen (δ15N) isotopes were used to identify dietary sources of contaminants, trophic level, and potential biomagnification through food chains. Generalised linear models revealed that metal burdens were often poorly correlated with δ 13C, indicating their uptake from a range of freshwater, brackish, and marine carbon sources-not surprising due to widespread contamination across the tidal estuary. Feather mercury increased significantly with trophic level (inferred from δ15N). White-bellied Sea-eagle Haliaeetus leucogaster samples contained 240 times more mercury than feral Goose Anser cygnoides. Feather arsenic and copper concentrations were significantly higher in birds feeding lower in the food chain. For several piscivorous species, both chick and adults were sampled revealing significantly higher feather mercury, zinc, and selenium in adults. Feathers from birds found dead along the banks of the estuary had significantly higher lead loads than from live birds, and numerous individuals had levels of mercury, zinc, and lead above toxic thresholds reported in other studies. These results highlight the need to include biota from higher trophic levels in contaminant monitoring programs to understand fully the fate and broader implications of contaminants in the environment.
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Affiliation(s)
- L D Einoder
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, 0909, Australia.
- Derwent Estuary Program Ltd, 24 Davey Street, Hobart, TAS, 7001, Australia.
- c/o Prof. Stephen Garnett, Charles Darwin University, Darwin, NT, 0909, Australia.
| | - C K MacLeod
- Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Nubeena Cresent, Taroona, Hobart, TAS, 7053, Australia
| | - C Coughanowr
- Derwent Estuary Program Ltd, 24 Davey Street, Hobart, TAS, 7001, Australia
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62
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Wan Z, Liu Y, Chen S, Song K, Peng Y, Zhao N, Ouyang X, Wang X. Facile fabrication of a highly durable and flexible MoS2@RTV sponge for efficient oil-water separation. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.03.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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63
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Clatterbuck CA, Lewison RL, Dodder NG, Zeeman C, Schiff K. Seabirds as regional biomonitors of legacy toxicants on an urbanized coastline. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 619-620:460-469. [PMID: 29156266 DOI: 10.1016/j.scitotenv.2017.11.057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/19/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
Seabirds are often cited as sentinels of the marine environment, but are rarely used in traditional ocean and coastal contaminant monitoring. Four classes of persistent organic pollutants (POPs, n=68) and three trace elements (mercury, selenium, and arsenic) were measured in the eggs of California least terns (Sterna antillarum browni), caspian terns (Hydroprogne caspia), double-crested cormorants (Phalacrocorax auritus), and western gulls (Larus occidentalis) that nest in the Southern California Bight. Building on a periodic five year regional monitoring program, we measured contaminant exposure and assessed the utility of seabirds as regional contaminant biomonitors. We found that the eggs of larger, more piscivorous species generally had the highest concentrations of POPs and trace elements while California least terns had the lowest concentrations, except for mercury which was higher in least terns. As expected, DDT concentrations were elevated near the Palos Verdes Superfund site. However, we also detected a previously unknown latitudinal pattern in PBDE concentrations in least terns. POP congener profiles also confirmed differences in contamination in urban least tern colonies closest to urban centers. Though toxicants were at detectable levels across species and sites, concentrations were below those known to cause adverse effects in avian taxa and are steady or declining compared to previous studies in this region. Our results suggest that regional seabird monitoring can inform site-specific remediation and support management and protection of regionally-threatened wildlife and coastal systems. Integration of seabird contaminant data with traditional sediment, water, bivalve and fish monitoring is needed to further our understanding of exposure pathways and food web contaminant transfer.
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Affiliation(s)
- Corey A Clatterbuck
- San Diego State University, Biology Department, San Diego, CA, USA; University of California-Davis, Graduate Group in Ecology, Davis, CA, USA.
| | | | - Nathan G Dodder
- San Diego State University Research Foundation, San Diego, CA, USA
| | - Catherine Zeeman
- US Fish and Wildlife Service, Carlsbad Fish & Wildlife Office, Carlsbad, CA, USA
| | - Kenneth Schiff
- Southern California Coastal Water Research Project, Costa Mesa, CA, USA
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64
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Du W, Dai G, Wang B, Li Z, Li L. Biodegradable porous organosilicone-modified collagen fiber matrix: Synthesis and high oil absorbency. J Appl Polym Sci 2018. [DOI: 10.1002/app.46264] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Weining Du
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
| | - Guochen Dai
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
| | - Baochuan Wang
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
| | - Zhengjun Li
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
| | - Lixin Li
- College of Chemistry; Sichuan University; Chengdu 610065 China
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65
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Ma J, He Y, Zeng G, Li F, Li Y, Xiao J, Yang S. Bio-inspired method to fabricate poly-dopamine/reduced graphene oxide composite membranes for dyes and heavy metal ion removal. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.4205] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jing Ma
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan P.R. China
- Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province; Southwest Petroleum University; Chengdu Sichuan P.R. China
| | - Yi He
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan P.R. China
- Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province; Southwest Petroleum University; Chengdu Sichuan P.R. China
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu Sichuan P.R. China
| | - Guangyong Zeng
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan P.R. China
- Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province; Southwest Petroleum University; Chengdu Sichuan P.R. China
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation; Southwest Petroleum University; Chengdu Sichuan P.R. China
| | - Fei Li
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan P.R. China
- Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province; Southwest Petroleum University; Chengdu Sichuan P.R. China
| | - Yubin Li
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan P.R. China
- Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province; Southwest Petroleum University; Chengdu Sichuan P.R. China
| | - Jianfei Xiao
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan P.R. China
- Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province; Southwest Petroleum University; Chengdu Sichuan P.R. China
| | - Shuizhen Yang
- College of Chemistry and Chemical Engineering; Southwest Petroleum University; Chengdu Sichuan P.R. China
- Oil and Gas Field Applied Chemistry Key Laboratory of Sichuan Province; Southwest Petroleum University; Chengdu Sichuan P.R. China
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Ponnaiah SK, Periakaruppan P, Vellaichamy B, Nagulan B. Efficacious separation of electron-hole pairs in CeO 2-Al 2O 3 nanoparticles embedded GO heterojunction for robust visible-light driven dye degradation. J Colloid Interface Sci 2017; 512:219-230. [PMID: 29065387 DOI: 10.1016/j.jcis.2017.10.058] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 10/12/2017] [Accepted: 10/15/2017] [Indexed: 11/17/2022]
Abstract
Herein, we have developed a facile and one pot synthesis of ternary CeO2-Al2O3@GO nanocomposite via wet chemical method. The structural and morphological characteristics of the synthesized nanocomposite was investigated using UV-DRS, FT-IR, XRD, FE-SEM, HR-TEM, EDX and TGA analysis. The CeO2-Al2O3@GO composite was tested for its ability to photocatalytically degrade Rhodamine B (RhB) under visible light illumination. The influence of various operational parameters such as pH, catalyst dosage and initial dye concentration on the photo degradation was investigated in detail. The synthesized CeO2-Al2O3@GO composite shows greater photocatalytic degradation of RhB (99.0%) under visible light irradiation than the raw CeO2, Al2O3, and GO catalysts and any other reported nanocomposite materials. The recyclability results also demonstrate the excellent stability and reusability of the CeO2-Al2O3@GO nanocomposite. This work will be beneficial in the field of industrial and engineering applications in the degradation of organic pollutants. Also, a study of this kind will definitely stimulate many researches in the recently emerging field of solar-driven water splitting.
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Affiliation(s)
| | | | | | - Bhuvana Nagulan
- Department of Chemistry, Jeppiaar Institute of Technology, Chennai 631 604, Tamil Nadu, India
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Zeng G, He Y, Ye Z, Yang X, Chen X, Ma J, Li F. Novel Halloysite Nanotubes Intercalated Graphene Oxide Based Composite Membranes for Multifunctional Applications: Oil/Water Separation and Dyes Removal. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02723] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Guangyong Zeng
- State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Yi He
- State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Zhongbin Ye
- State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Xi Yang
- State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Xi Chen
- State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Jing Ma
- State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Fei Li
- State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- College
of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
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68
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Carravieri A, Cherel Y, Brault-Favrou M, Churlaud C, Peluhet L, Labadie P, Budzinski H, Chastel O, Bustamante P. From Antarctica to the subtropics: Contrasted geographical concentrations of selenium, mercury, and persistent organic pollutants in skua chicks (Catharacta spp.). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 228:464-473. [PMID: 28570991 DOI: 10.1016/j.envpol.2017.05.053] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/07/2017] [Accepted: 05/19/2017] [Indexed: 06/07/2023]
Abstract
Seabirds integrate bioaccumulative contaminants via food intake and have revealed geographical trends of contamination in a variety of ecosystems. Pre-fledging seabird chicks are particularly interesting as bioindicators of chemical contamination, because concentrations in their tissues reflect primarily dietary sources from the local environment. Here we measured 14 trace elements and 18 persistent organic pollutants (POPs) in blood of chicks of skuas that breed in four sites encompassing a large latitudinal range within the southern Indian Ocean, from Antarctica (Adélie Land, south polar skua Catharacta maccormicki), through subantarctic areas (Crozet and Kerguelen Islands, brown skua C. lonnbergi), to the subtropics (Amsterdam Island, C. lonnbergi). Stables isotopes of carbon (δ13C, feeding habitat) and nitrogen (δ15N, trophic position) were also measured to control for the influence of feeding habits on contaminant burdens. Concentrations of mercury (Hg) and selenium (Se) were very high at all the four sites, with Amsterdam birds having the highest concentrations ever reported in chicks worldwide (4.0 ± 0.8 and 646 ± 123 μg g-1 dry weight, respectively). Blood Hg concentrations showed a clear latitudinal pattern, increasing from chicks in Antarctica to chicks in the subantarctic and subtropical islands. Interestingly, blood Se concentrations showed similar between-population differences to Hg, suggesting its involvement in protective mechanisms against Hg toxicity. Chicks' POPs pattern was largely dominated by organochlorine pesticides, in particular DDT metabolites and hexachlorobenzene (HCB). Skua chicks from subantarctic islands presented high concentrations and diversity of POPs. By contrast, chicks from the Antarctic site overall had the lowest concentrations and diversity of both metallic and organic contaminants, with the exception of HCB and arsenic. Skua populations from these sites, being naturally exposed to different quantities of contaminants, are potentially good models for testing toxic effects in developing chicks in the wild.
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Affiliation(s)
- Alice Carravieri
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS-Université de La Rochelle, 79360 Villiers-en-Bois, France.
| | - Yves Cherel
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS-Université de La Rochelle, 79360 Villiers-en-Bois, France
| | - Maud Brault-Favrou
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-Université de la Rochelle, 2 rue Olympe de Gouges, 17000 La Rochelle, France
| | - Carine Churlaud
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-Université de la Rochelle, 2 rue Olympe de Gouges, 17000 La Rochelle, France
| | - Laurent Peluhet
- CNRS, UMR 5805 EPOC (LPTC Research group), Université de Bordeaux, 351 Cours de la Libération, F 33405 Talence Cedex, France
| | - Pierre Labadie
- CNRS, UMR 5805 EPOC (LPTC Research group), Université de Bordeaux, 351 Cours de la Libération, F 33405 Talence Cedex, France
| | - Hélène Budzinski
- CNRS, UMR 5805 EPOC (LPTC Research group), Université de Bordeaux, 351 Cours de la Libération, F 33405 Talence Cedex, France
| | - Olivier Chastel
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS-Université de La Rochelle, 79360 Villiers-en-Bois, France
| | - Paco Bustamante
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-Université de la Rochelle, 2 rue Olympe de Gouges, 17000 La Rochelle, France
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69
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Davis ML, Elliott JE, Williams TD. The Glaucous-Winged Gull (Larus glaucescens) as an Indicator of Chemical Contaminants in the Canadian Pacific Marine Environment: Evidence from Stable Isotopes. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2017; 73:247-255. [PMID: 28528408 DOI: 10.1007/s00244-017-0368-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 01/17/2017] [Indexed: 06/07/2023]
Abstract
The Glaucous-winged gull (Larus glaucescens) has been selected by Environment Canada as a marine indicator species for long-term monitoring of persistent contaminants in the Canadian Pacific. However, the indicator value of this species depends on its trophic level and proportion of marine prey in its diet. Eggs, used as the monitoring medium, are produced entirely from maternal resources and knowledge of adult diet before and during egg production is critical to interpreting contaminant levels. Due to a lack of recent and reliable dietary ecology work, we examined the diet of breeding Glaucous-winged gulls through carbon (δ13C) and nitrogen (δ15N) stable isotope analysis at three colonies on the Pacific coast. Near-shore marine prey, occupying a high trophic level (δ15N), composed a predominant component of all Glaucous-winged gull diet. Adult diet composition from colonies in the Salish Sea was more varied than the west coast of Vancouver Island, reflecting the opportunistic foraging nature of this species in areas where the abundance of marine prey is known to fluctuate. Compared with incubating adults, pre-laying adults had a significantly lower trophic level that may reflect the need to consume marine invertebrates to acquire specific nutrients necessary for egg production. Interannual variation in both trophic level and prey source (δ13C) in egg and chick tissues indicates the need to pair ongoing contaminant monitoring with stable isotope analysis. The predominantly marine diet and relatively high trophic level of this gull supports its use as an indicator of marine pollution on the Pacific coast.
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Affiliation(s)
- M L Davis
- Centre for Wildlife Ecology, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
- Hemmera, 4730 Kingsway, Burnaby, BC, V5H OC6, Canada
| | - J E Elliott
- Centre for Wildlife Ecology, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada.
- Pacific Wildlife Research Centre, Environment Canada, Delta, BC, V4K 3N2, Canada.
| | - T D Williams
- Centre for Wildlife Ecology, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
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70
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Zhang Y, Johnson AC, Su C, Zhang M, Jürgens MD, Shi Y, Lu Y. Which persistent organic pollutants in the rivers of the Bohai Region of China represent the greatest risk to the local ecosystem? CHEMOSPHERE 2017; 178:11-18. [PMID: 28314123 DOI: 10.1016/j.chemosphere.2017.02.137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 02/16/2017] [Accepted: 02/26/2017] [Indexed: 06/06/2023]
Abstract
Freshwater aquatic organisms can be exposed to hundreds of persistent organic pollutants (POPs) discharged by natural and anthropogenic activities. Given our limited resources it is necessary to identify, from the existing evidence, which is the greatest threat so that control measures can be targeted wisely. The focus of this study was to rank POPs according to the relative risk they represent for aquatic organisms in rivers in the Bohai Region, China. A list of 14 POPs was compiled based on the available data on their presence in these rivers and ecotoxicological data. Those that were widely detected were benzo[a]pyrene, p,p'-DDE, p,p'-DDT, endrin, fluoranthene, heptachlor, hexabromocyclododecane, hexachlorobenzene, α-hexachlorocyclohexane, γ-hexachlorocyclohexane, naphthalene, perfluorooctanoic acid, perfluorooctane sulfonate and phenanthrene. Effect concentrations were compiled for Chinese relevant and standard test species and compared with river aqueous concentrations. Only bed-sediment concentrations were available so water levels were calculated based on the known local sediment organic carbon concentration and the Koc. The POPs were ranked on the ratio between the median river and median effect concentrations. Of the POPs studied, fluoranthene was ranked as the highest threat, followed by phenanthrene, naphthalene and p,p'-DDE. The risk from p,p'-DDE may be magnified due to being highly bioaccumulative. However, the greatest overlap between river concentrations and effect levels was for lindane. Overall, fish was the most sensitive species group to the risks from POPs. Hotspots with the highest concentrations and hence risk were mainly associated with watercourses draining in Tianjin, the biggest city in the Bohai Region.
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Affiliation(s)
- Yueqing Zhang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Andrew C Johnson
- Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford Wallingford, Oxon, OX 10 8BB, UK
| | - Chao Su
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meng Zhang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Monika D Jürgens
- Centre for Ecology & Hydrology, Maclean Building, Crowmarsh Gifford Wallingford, Oxon, OX 10 8BB, UK
| | - Yajuan Shi
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yonglong Lu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Zhou Y, Yin G, Asplund L, Stewart K, Rantakokko P, Bignert A, Ruokojärvi P, Kiviranta H, Qiu Y, Ma Z, Bergman Å. Human exposure to PCDDs and their precursors from heron and tern eggs in the Yangtze River Delta indicate PCP origin. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 225:184-192. [PMID: 28371733 DOI: 10.1016/j.envpol.2017.03.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 02/17/2017] [Accepted: 03/24/2017] [Indexed: 06/07/2023]
Abstract
Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are highly toxic to humans and wildlife. In the present study, PCDD/Fs were analyzed in the eggs of whiskered terns (Chlidonias hybrida), and genetically identified eggs from black-crowned night herons (Nycticorax nycticorax) sampled from two lakes in the Yangtze River Delta area, China. The median toxic equivalent (TEQ) of PCDD/Fs were 280 (range: 95-1500) and 400 (range: 220-1100) pg TEQ g-1 lw (WHO, 1998 for birds) in the eggs of black-crowned night heron and whiskered tern, respectively. Compared to known sources, concentrations of PCDDs relative to the sum of PCDD/Fs in bird eggs, demonstrated high abundance of octachlorodibenzo-p-dioxin (OCDD), 1,2,3,4,6,7,8-heptaCDD and 1,2,3,6,7,8-hexaCDD indicating pentachlorophenol (PCP), and/or sodium pentachlorophenolate (Na-PCP) as significant sources of the PCDD/Fs. The presence of polychlorinated diphenyl ethers (PCDEs), hydroxylated and methoxylated polychlorinated diphenyl ethers (OH- and MeO-PCDEs, known impurities in PCP products), corroborates this hypothesis. Further, significant correlations were found between the predominant congener CDE-206, 3'-OH-CDE-207, 2'-MeO-CDE-206 and OCDD, indicating a common origin. Eggs from the two lakes are sometimes used for human consumption. The WHO health-based tolerable intake of PCDD/Fs is exceeded if eggs from the two lakes are consumed regularly on a weekly basis, particularly for children. The TEQs extensively exceed maximum levels for PCDD/Fs in hen eggs and egg products according to EU legislation (2.5 pg TEQ g-1lw). The results suggest immediate action should be taken to manage the contamination, and further studies evaluating the impacts of egg consumption from wild birds in China. Likewise, studies on dioxins and other POPs in common eggs need to be initiated around China.
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Affiliation(s)
- Yihui Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-10691 Stockholm, Sweden.
| | - Ge Yin
- Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Lillemor Asplund
- Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Kathryn Stewart
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Panu Rantakokko
- National Institute for Health and Welfare, P.O. Box95, 70701 Kuopio, Finland
| | - Anders Bignert
- Swedish Museum of Natural History, Box 50007, SE-10405 Stockholm, Sweden; Key Laboratory of Yangtze River Water Environment (Ministry of Education), College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Päivi Ruokojärvi
- National Institute for Health and Welfare, P.O. Box95, 70701 Kuopio, Finland
| | - Hannu Kiviranta
- National Institute for Health and Welfare, P.O. Box95, 70701 Kuopio, Finland
| | - Yanling Qiu
- Key Laboratory of Yangtze River Water Environment (Ministry of Education), College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Zhijun Ma
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai 200438, China
| | - Åke Bergman
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-10691 Stockholm, Sweden; Swetox, Karolinska Institute, Unit of Toxicology Sciences, Forskargatan 20, SE-15136 Södertälje, Sweden
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Photosensitization of TiO 2 nanofibers by Ag 2S with the synergistic effect of excess surface Ti 3+ states for enhanced photocatalytic activity under simulated sunlight. Sci Rep 2017; 7:255. [PMID: 28325907 PMCID: PMC5428275 DOI: 10.1038/s41598-017-00366-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 02/20/2017] [Indexed: 11/25/2022] Open
Abstract
TiO2 nanofibers, with mean diameter ~200 nm, were fabricated by electrospinning and successfully photosensitized with low bandgap Ag2S nanoparticles of 11, 17, 23 and 40 nm mean sizes, with corresponding loading of 4, 10, 18 and 29 wt.% Ag2S, respectively. 17 nm Ag2S@TiO2 nanofibers exhibited optimal activity in the photodegradation of methylene blue under simulated sunlight with pseudo-first order rate constant of 0.019 min−1 compared to 0.009 min−1 for pure TiO2 nanofibers. In spite of greater visible-light absorption and reduced bandgap, larger than 17 nm Ag2S nanoparticles exhibited sluggish photodegradation kinetics probably due to less photo-induced carriers generation in TiO2 and reduced electron injection rates from the larger sized Ag2S into TiO2. Furthermore, a UV-O3 surface treatment induced excess Ti3+ surface states and oxygen vacancies which synergistically enhanced the photodegradation rate constant to 0.030 min−1 for 17 nm Ag2S@TiO2 sample which is ~70% better than the previously reported for Ag2S/TiO2 hierarchical spheres. This was attributed to the efficient charge separation and transfer driven by increased visible-light absorption, bandgap narrowing and reduced electron-hole recombination rates. The present study demonstrate the potential utilization of Ag2S@TiO2 nanofibers in filtration membranes for removal of organic pollutants from wastewater.
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Abstract
Lipid extraction is an important component of many ecological and ecotoxicological measurements. For instance, percent lipid is often used as a measure of body condition, under the assumption that those individuals with higher lipid reserves are healthier. Likewise, lipids are depleted in 13C compared with protein, and it is consequently a routine to remove lipids prior to measuring carbon isotopes in ecological studies so that variation in lipid content does not obscure variation in diet. We provide detailed methods for two different protocols for lipid extraction: Soxhlet apparatus and manual distillation. We also provide methods for polar and nonpolar solvents. Neutral (nonpolar) solvents remove some lipids but few non-lipid compounds, whereas polar solvents remove most lipids but also many non-lipid compounds. We discuss each of the methods and provide guidelines for best practices. We recommend that, for stable isotope analysis, researchers test for a relationship between the change in carbon stable isotope ratio and the amount of lipid extracted to see if the degree of extraction has an impact on isotope ratios. Stable isotope analysis is widely used by ecologists, and we provide a detailed methodology that minimizes known biases.
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74
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Elliott KH, Elliott JE. Origin of Sulfur in Diet Drives Spatial and Temporal Mercury Trends in Seabird Eggs From Pacific Canada 1968-2015. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:13380-13386. [PMID: 27993060 DOI: 10.1021/acs.est.6b05458] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Mercury (Hg) is a neurotoxin that can be particularly harmful to top predators because it biomagnifies through the food web. Due to variation in the food web structure, variation in Hg exposure in predators may represent variation in diet rather than Hg availability. We measured Hg in eggs from six seabird species (N = 537) over 47 years. In contrast to expectation, storm-petrels feeding partially on invertebrates had the highest Hg burden while herons feeding on large fish had the lowest Hg burden. A multiple regression showed that Hg correlated with δ34S (R2 = 0.86) rather than trophic level (δ15N of "trophic" amino acids). Sulfate-rich environments (high δ34S) have sulfate-reducing bacteria that produce methylmercury. Variation in Hg within and among seabirds near the top of the food web was associated with variation in δ34S at the base of the food web more so than trophic position within the food web. Hg levels in seabirds only changed over time for those species where δ34S also varied in tandem; after accounting for diet (δ34S), there was no variation in Hg levels. Variation in Hg in seabirds across space and time was associated with the origin of sulfur in the diet.
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Affiliation(s)
- Kyle H Elliott
- Department of Natural Resource Sciences, McGill University , Ste Anne-de-Bellevue Quebec, Canada H9X 3 V9
| | - John E Elliott
- Science & Technology Branch, Environment Canada , Delta British Columbia, Canada V4K 3N2
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75
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Gewurtz SB, Martin PA, Letcher RJ, Burgess NM, Champoux L, Elliott JE, Weseloh DVC. Spatio-temporal trends and monitoring design of perfluoroalkyl acids in the eggs of gull (Larid) species from across Canada and parts of the United States. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 565:440-450. [PMID: 27183458 DOI: 10.1016/j.scitotenv.2016.04.149] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/21/2016] [Accepted: 04/21/2016] [Indexed: 06/05/2023]
Abstract
A large spatial dataset of perfluoroalkyl acid (PFAA) concentrations in eggs of herring gulls (Larus argentatus or congeneric species) collected from late April to early June between 2009 and 2014 from 28 colonies across Canada and parts of the Unites States was used to evaluate location-specific patterns in chemical concentrations and to generate hypotheses on the major sources affecting PFAA distributions. The highly bioaccumulative perfluorooctane sulfonic acid (PFOS) as well as other perfluoroalkyl sulfonic acids (PFSAs) showed the greatest concentrations in eggs from the lower Great Lakes of southern Ontario as well as from the St. Lawrence River. Despite the 2000 to 2002 phase-out of PFOS and related C8 chemistry by the major manufacturer at the time, ongoing losses from consumer products during use and disposal in urban/industrial locations continue to be major sources to the environment and are influencing the spatial trends of PFOS in Canada. In comparison to PFOS, perfluoroalkyl carboxylic acids (PFCAs) were not as concentrated in eggs in close proximity to urbanized/industrialized centers, but had surprisingly elevated levels in relatively remote regions such as Great Slave Lake, NT and East Bay in Hudson Bay, NU. The present results support the hypothesis that atmospheric transport and degradation of precursor chemicals, such as the fluorotelomer alcohols 8:2 FTOH and 10:2 FTOH, are influencing the spatial trends of PFCAs in Canada. A power analysis conducted on a representative urbanized/industrialized colony in the Toronto Harbour, ON, and a relatively remote colony in Lake Superior, emphasized the importance of consistent and long-term data collection in order to detect the anticipated changes in PFAA concentrations in Canadian gull eggs.
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Affiliation(s)
| | - Pamela A Martin
- Ecotoxicology and Wildlife Health Division, Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment and Climate Change Canada, Burlington, ON L7R 4A6, Canada
| | - Robert J Letcher
- Ecotoxicology and Wildlife Health Division, Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment and Climate Change Canada, National Wildlife Research Centre, Carleton University, Ottawa, ON K1A 0H3, Canada
| | - Neil M Burgess
- Ecotoxicology and Wildlife Health Division, Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment and Climate Change Canada, Mount Pearl, NL A1N 4T3, Canada
| | - Louise Champoux
- Ecotoxicology and Wildlife Health Division, Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment and Climate Change Canada, Québec City, QC G1J 0C3, Canada
| | - John E Elliott
- Ecotoxicology and Wildlife Health Division, Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment and Climate Change Canada, Pacific Wildlife Research Centre, Delta, BC V4K 3Y3, Canada
| | - D V Chip Weseloh
- Canadian Wildlife Service, Environment and Climate Change Canada, Downsview, ON M3H 5T4, Canada
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76
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Becker PH, Goutner V, Ryan PG, González-Solís J. Feather mercury concentrations in Southern Ocean seabirds: Variation by species, site and time. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 216:253-263. [PMID: 27267741 DOI: 10.1016/j.envpol.2016.05.061] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 05/19/2016] [Accepted: 05/23/2016] [Indexed: 06/06/2023]
Abstract
We studied mercury contamination in 25 seabird species breeding along a latitudinal gradient across the Southern Ocean, from Gough Island (40°S) through Marion Island (47°S) to Byers Peninsula (63°S). Total mercury concentrations in body feather samples of adults caught at breeding colonies from 2008 to 2011 were determined. Krill (Euphausia spp.) and other zooplankton consumers had low mercury concentrations (gentoo penguin Pygoscelis papua, chinstrap penguin Pseudomonas Antarctica, common diving petrel Pelecanoides urinatrix, broad-billed prion Pachyptila vittata; mean levels 308-753 ng g(-1)), whereas seabirds consuming squid or carrion had high mercury concentrations (ascending order: Kerguelen petrel Aphrodroma brevirostris, southern giant petrel Macronectes giganteus, soft-plumaged petrel Pterodroma mollis, sooty albatross Phoebetria fusca, Atlantic petrel Pterodroma incerta, northern giant petrel Macronectes halli, great-winged petrel Pterodroma macroptera; 10,720-28038 ng g(-1)). The two species with the highest mercury concentrations, northern giant petrels and great-winged petrels, bred at Marion Island. Among species investigated at multiple sites, southern giant petrels had higher mercury levels at Marion than at Gough Island and Byers Peninsula. Mercury levels among Byers Peninsula seabirds were low, in two species even lower than levels measured 10 years before at Bird Island, South Georgia. Replicate measurements after about 25 years at Gough Island showed much higher mercury levels in feathers of sooty albatrosses (by 187%), soft-plumaged petrels (53%) and Atlantic petrels (49%). Concentrations similar to the past were detected in southern giant petrels at Gough and Marion islands, and in northern giant petrels at Marion. There were no clear indications that timing of moult or migratory behavior affected mercury contamination patterns among species. Causes of inter-site or temporal differences in mercury contamination could not be verified due to a lack of long-term data related to species' diet and trophic levels, which should be collected in future together with data on mercury contamination.
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Affiliation(s)
- Peter H Becker
- Institute of Avian Research "Vogelwarte Helgoland", An der Vogelwarte 21, D 26386, Wilhelmshaven, Germany.
| | - Vassilis Goutner
- Department of Zoology, School of Biology, Aristotle University of Thessaloniki, GR-541 24, Thessaloniki, Greece.
| | - Peter G Ryan
- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch, 7701, South Africa.
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77
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Andrades R, Martins AS, Fardim LM, Ferreira JS, Santos RG. Origin of marine debris is related to disposable packs of ultra-processed food. MARINE POLLUTION BULLETIN 2016; 109:192-195. [PMID: 27315750 DOI: 10.1016/j.marpolbul.2016.05.083] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 06/06/2023]
Abstract
Marine debris is currently distributed worldwide, and the discard and contamination pose hazards to human and wildlife health. One of the gaps in debris science is tracking the source of debris to better evaluate and avoid the pathway of debris from the source to marine environment. For this, we evaluated three beaches of different urbanization levels and environmental influences; a low urbanized beach, a highly urbanized beach and a non-urbanized estuary-associated beach, in order to determine the sources and original use of debris. Plastic was the major material found on beaches, and the urbanized beach recorded the highest debris densities. Marine debris was primarily from land-based sources, and the debris recorded in all beaches was mainly assigned as food-related items. Our results highlight the major presence of disposable and short-lived products comprising the majority of debris that enters the ocean and draw attention to the unsustainable lifestyle of current society.
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Affiliation(s)
- Ryan Andrades
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, 29075-910 Vitória, ES, Brazil.
| | - Agnaldo S Martins
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, 29075-910 Vitória, ES, Brazil
| | - Lorena M Fardim
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, 29075-910 Vitória, ES, Brazil
| | - Juliana S Ferreira
- Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, 29075-910 Vitória, ES, Brazil
| | - Robson G Santos
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal de Alagoas, Av. Lourival Melo Mota, s/n, Cidade Universitária 57072-900 Maceió, AL, Brazil
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78
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Obi CC, Adebusoye SA, Ugoji EO, Ilori MO, Amund OO, Hickey WJ. Microbial Communities in Sediments of Lagos Lagoon, Nigeria: Elucidation of Community Structure and Potential Impacts of Contamination by Municipal and Industrial Wastes. Front Microbiol 2016; 7:1213. [PMID: 27547200 PMCID: PMC4974257 DOI: 10.3389/fmicb.2016.01213] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 07/21/2016] [Indexed: 01/13/2023] Open
Abstract
Estuarine sediments are significant repositories of anthropogenic contaminants, and thus knowledge of the impacts of pollution upon microbial communities in these environments is important to understand potential effects on estuaries as a whole. The Lagos lagoon (Nigeria) is one of Africa’s largest estuarine ecosystems, and is impacted by hydrocarbon pollutants and other industrial and municipal wastes. The goal of this study was to elucidate microbial community structure in Lagos lagoon sediments to identify groups that may be adversely affected by pollution, and those that may serve as degraders of environmental contaminants, especially polycyclic aromatic hydrocarbons (PAHs). Sediment samples were collected from sites that ranged in types and levels of anthropogenic impacts. The sediments were characterized for a range of physicochemical properties, and microbial community structure was determined by Illumina sequencing of the 16S rRNA genes. Microbial diversity (species richness and evenness) in the Apapa and Eledu sediments was reduced compared to that of the Ofin site, and communities of both of the former two were dominated by a single operational taxonomic unit (OTU) assigned to the family Helicobacteraceae (Epsilonproteobacteria). In the Ofin community, Epsilonproteobacteria were minor constituents, while the major groups were Cyanobacteria, Bacteroidetes, and Firmicutes, which were all minor in the Apapa and Eledu sediments. Sediment oxygen demand (SOD), a broad indicator of contamination, was identified by multivariate analyses as strongly correlated with variation in alpha diversity. Environmental variables that explained beta diversity patterns included SOD, as well as levels of naphthalene, acenaphthylene, cobalt, cadmium, total organic matter, or nitrate. Of 582 OTU identified, abundance of 167 was significantly correlated (false discovery rate q≤ 0.05) to environmental variables. The largest group of OTU correlated with PAH levels were PAH/hydrocarbon-degrading genera of the Oceanospirillales order (Gammaproteobacteria), which were most abundant in the hydrocarbon-contaminated Apapa sediment. Similar Oceanospirillales taxa are responsive to marine oil spills and thus may present a unifying theme in marine microbiology as bacteria adapted for degradation of high hydrocarbon loads, and may represent a potential means for intrinsic remediation in the case of the Lagos lagoon sediments.
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Affiliation(s)
- Chioma C Obi
- Department of Microbiology, University of LagosLagos, Nigeria; O.N. Allen Laboratory for Soil Microbiology, Department of Soil Science, University of Wisconsin-Madison, MadisonWI, USA
| | | | - Esther O Ugoji
- Department of Microbiology, University of Lagos Lagos, Nigeria
| | - Mathew O Ilori
- Department of Microbiology, University of Lagos Lagos, Nigeria
| | | | - William J Hickey
- O.N. Allen Laboratory for Soil Microbiology, Department of Soil Science, University of Wisconsin-Madison, Madison WI, USA
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79
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Wang K, Sun H, He F, Xue H, Liu H, Xie X, Liu C. Room-temperature Synthesis of NaBiO3/Bi(C2O4)OH Composite Spindle Nanorods with Enhanced Visible-light Photocatalytic Performance. CHEM LETT 2016. [DOI: 10.1246/cl.151201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ke Wang
- School of Materials Science and Engineering, Hebei University of Technology
- Department of Mathematics and Physics, Hebei Institute of Architecture and Civil Engineering
| | - Hongkai Sun
- Department of Mathematics and Physics, Hebei Institute of Architecture and Civil Engineering
| | - Fei He
- Department of Mathematics and Physics, Hebei Institute of Architecture and Civil Engineering
| | - Hongdan Xue
- Department of Mathematics and Physics, Hebei Institute of Architecture and Civil Engineering
| | - Hui Liu
- School of Materials Science and Engineering, Hebei University of Technology
| | - Xinjian Xie
- School of Materials Science and Engineering, Hebei University of Technology
| | - Caichi Liu
- School of Materials Science and Engineering, Hebei University of Technology
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80
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Ioakeimidis C, Fotopoulou KN, Karapanagioti HK, Geraga M, Zeri C, Papathanassiou E, Galgani F, Papatheodorou G. The degradation potential of PET bottles in the marine environment: An ATR-FTIR based approach. Sci Rep 2016; 6:23501. [PMID: 27000994 PMCID: PMC4802224 DOI: 10.1038/srep23501] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 03/09/2016] [Indexed: 11/14/2022] Open
Abstract
The dominance and persistence of plastic debris in the marine environment are well documented. No information exists in respect to their lifespan in the marine environment. Nevertheless, the degradation potential of plastic litter items remains a critical issue for marine litter research. In the present study, polyethylene terephthalate bottles (PETs) collected from the submarine environment were characterized using ATR-FTIR in respect to their degradation potential attributed to environmental conditions. A temporal indication was used as indicative to the years of presence of the PETs in the environment as debris. PETs seem to remain robust for approximately fifteen years. Afterwards, a significant decrease of the native functional groups was recorded; some even disappear; or new-not typical for PETs-are created. At a later stage, using the PET time series collected from the Saronikos Gulf (Aegean Sea–E. Mediterranean), it was possible to date bottles that were collected from the bottom of the Ionian Sea (W. Greece). It is the first time that such a study has been conducted with samples that were actually degraded in the marine environment.
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Affiliation(s)
- C Ioakeimidis
- Laboratory of Marine Geology and Physical Oceanography, Department of Geology, University of Patras, 26500 Patras, Greece.,Institute of Oceanography, Hellenic Centre for Marine Research, 19013 Anavyssos, Greece
| | - K N Fotopoulou
- Department of Chemistry, University of Patras, 26500 Patras, Greece
| | | | - M Geraga
- Laboratory of Marine Geology and Physical Oceanography, Department of Geology, University of Patras, 26500 Patras, Greece
| | - C Zeri
- Institute of Oceanography, Hellenic Centre for Marine Research, 19013 Anavyssos, Greece
| | - E Papathanassiou
- Institute of Oceanography, Hellenic Centre for Marine Research, 19013 Anavyssos, Greece
| | - F Galgani
- Departement Océanographie et Dynamique des Ecosystemes, Institut français de recherche pour l'exploitation de la mer (Ifremer), Bastia, Corsica, France
| | - G Papatheodorou
- Laboratory of Marine Geology and Physical Oceanography, Department of Geology, University of Patras, 26500 Patras, Greece
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81
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Franklin J. How reliable are field-derived biomagnification factors and trophic magnification factors as indicators of bioaccumulation potential? Conclusions from a case study on per- and polyfluoroalkyl substances. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2016; 12:6-20. [PMID: 25845916 DOI: 10.1002/ieam.1642] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 12/05/2014] [Accepted: 03/30/2015] [Indexed: 06/04/2023]
Abstract
This review examines the usefulness of the metrics BMF (biomagnification factor) and TMF (trophic magnification factor), derived from field measurements of the levels of contaminants in naturally occurring biota, for characterizing the bioaccumulation potential ("B") of chemicals. Trophic magnification factor and BMF values greater than 1.0 are often considered to be the most conclusive indicators of B status, and the TMF criterion has been referred to as the "gold standard" for B categorization. Although not wishing to dispute the theoretical primacy of field-derived BMFs and TMFs as B metrics, we make the case that, in practice, the study-to-study (and even within-study) variability of the results is so great that they are of very restricted usefulness for assessing B status, at least in the case of the per- and polyfluoroalkyl substances (PFASs), on which we focus here. This conclusion is based on an analysis of the results of 24 peer-reviewed studies reporting field-derived BMFs or TMFs for 14 PFASs, for which BMF values often range over several orders of magnitude from <<1.0 to >>1.0, sometimes even in the same study. For TMFs, the range is a factor of approximately 20 for the most intensely studied PFASs (perfluorooctanoic acid [PFOA] and perfluorooctanesulfonic acid [PFOS]). We analyze the possible causes for such variability: To some extent it results from the differing ways in which the metrics are expressed, but most of the scatter is likely attributable to such factors as nonachievement of the tacitly assumed steady-state conditions, uncertainties in the feeding ecology, the impact of metabolism of precursor compounds, and so forth. As more trustworthy alternatives to field-derived BMFs and TMFs, we suggest the implementation of dietary BMF studies performed under strictly controlled conditions on aquatic, terrestrial, and avian species, as well as the consideration of measured elimination half-lives, which have been demonstrated to be directly related to BMF values.
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82
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Hamlin HJ, Marciano K, Downs CA. Migration of nonylphenol from food-grade plastic is toxic to the coral reef fish species Pseudochromis fridmani. CHEMOSPHERE 2015; 139:223-228. [PMID: 26134675 DOI: 10.1016/j.chemosphere.2015.06.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 06/18/2015] [Indexed: 06/04/2023]
Abstract
Nonylphenol (NP) is a non-ionic surfactant used extensively in industrial applications, personal care products, and many plastics. We exposed marine orchid dottybacks (Pseudochromis fridmani) for 48h to either glass, Teflon, or two bags labeled as FDA food-grade polyethylene (PE1 and PE2) from different manufacturers. The PE2 bags leached high levels of NP into the contact water, which were taken up by the fish, and decreased short and long-term survival. Concentrations of NP that leached from the bags were consistent with 96h LC50 values determined in this study, indicating NP is the likely toxic agent. Despite being similarly labeled, the NP concentrations that leached from the bags and the resultant toxicity to the fish varied dramatically between manufacturers. This study highlights that some plastics, labeled as food-safe, can be highly toxic to aquatic animals, and could pose a greater threat to humans than previously realized. This study also highlights risks for aquatic animals exposed to increasing quantities of plastic waste.
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Affiliation(s)
- Heather J Hamlin
- Aquaculture Research Institute, School of Marine Sciences, University of Maine, Orono, ME 04469, USA
| | - Kathleen Marciano
- Aquaculture Research Institute, School of Marine Sciences, University of Maine, Orono, ME 04469, USA
| | - Craig A Downs
- Haereticus Environmental Laboratory, PO BOX 92, Clifford, VA 24533, USA.
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83
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Quero GM, Cassin D, Botter M, Perini L, Luna GM. Patterns of benthic bacterial diversity in coastal areas contaminated by heavy metals, polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). Front Microbiol 2015; 6:1053. [PMID: 26528247 PMCID: PMC4602156 DOI: 10.3389/fmicb.2015.01053] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 09/14/2015] [Indexed: 02/01/2023] Open
Abstract
Prokaryotes in coastal sediments are fundamental players in the ecosystem functioning and regulate processes relevant in the global biogeochemical cycles. Nevertheless, knowledge on benthic microbial diversity patterns across spatial scales, or as function to anthropogenic influence, is still limited. We investigated the microbial diversity in two of the most chemically polluted sites along the coast of Italy. One site is the Po River Prodelta (Northern Adriatic Sea), which receives contaminant discharge from one of the largest rivers in Europe. The other site, the Mar Piccolo of Taranto (Ionian Sea), is a chronically polluted area due to steel production plants, oil refineries, and intense maritime traffic. We collected sediments from 30 stations along gradients of contamination, and studied prokaryotic diversity using Illumina sequencing of amplicons of a 16S rDNA gene fragment. The main sediment variables and the concentration of eleven metals, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) were measured. Chemical analyses confirmed the high contamination in both sites, with concentrations of PCBs particularly high and often exceeding the sediment guidelines. The analysis of more than 3 millions 16S rDNA sequences showed that richness decreased with higher contamination levels. Multivariate analyses showed that contaminants significantly shaped community composition. Assemblages differed significantly between the two sites, but showed wide within-site variations related with spatial gradients in the chemical contamination, and the presence of a core set of OTUs shared by the two geographically distant sites. A larger importance of PCB-degrading taxa was observed in the Mar Piccolo, suggesting their potential selection in this historically polluted site. Our results indicate that sediment contamination by multiple contaminants significantly alter benthic prokaryotic diversity in coastal areas, and suggests considering the potential contribution of the resident microbes to contaminant bioremediation actions.
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Affiliation(s)
- Grazia Marina Quero
- National Research Council-Institute of Marine Sciences (CNR-ISMAR), Venezia Italy
| | - Daniele Cassin
- National Research Council-Institute of Marine Sciences (CNR-ISMAR), Venezia Italy
| | - Margherita Botter
- National Research Council-Institute of Marine Sciences (CNR-ISMAR), Venezia Italy
| | - Laura Perini
- National Research Council-Institute of Marine Sciences (CNR-ISMAR), Venezia Italy
| | - Gian Marco Luna
- National Research Council-Institute of Marine Sciences (CNR-ISMAR), Venezia Italy
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84
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Elliott JE, Brogan J, Lee SL, Drouillard KG, Elliott KH. PBDEs and other POPs in urban birds of prey partly explained by trophic level and carbon source. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 524-525:157-65. [PMID: 25897724 DOI: 10.1016/j.scitotenv.2015.04.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/17/2015] [Accepted: 04/02/2015] [Indexed: 05/18/2023]
Abstract
As urban sprawl and agricultural intensification continue to invade prime wildlife habitat, some animals, even apex predators, are managing to adapt to this new environment. Chemical pollution is one of many stressors that wildlife encounter in urban environments. Predators are particularly sensitive to persistent chemical pollutants because they feed at a high trophic level where such pollution is biomagnified. To examine levels of pollution in urban birds of prey in the Lower Mainland region of British Columbia, Canada, we analyzed persistent organic contaminants in adult birds found dead of trauma injury. The hepatic geometric mean concentration of sum polybrominated diphenyl ethers (∑PBDEs) in 13 Cooper's hawks (Accipiter cooperii) from Greater Vancouver was 1873 ng/g (lipid weight) with one bird reaching 197,000n g/g lipid weight, the highest exposure reported to date for a wild bird. Concentrations of ∑PBDEs, ∑PCBs (polychlorinated biphenyls) and, surprisingly, cyclodiene insecticides were greatest in the urban environment while those of DDE (1,1-dichloroethylene bis[p-chlorophenyl) were highest in a region of intensive agriculture. The level of most chlorinated and brominated contaminants increased with trophic level (δ(15)N). The concentrations of some contaminants, PBDEs in particular, in these birds of prey may have some toxicological consequences. Apex predators in urban environments continue to be exposed to elevated concentrations of legacy pollutants as well as more recent brominated pollutants.
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Affiliation(s)
- John E Elliott
- Environment Canada, Science & Technology Branch, Pacific Wildlife Research Centre, Delta, British Columbia V4K 3N2, Canada; Department of Biological Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Jason Brogan
- Department of Biological Science, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Sandi L Lee
- Environment Canada, Science & Technology Branch, Pacific Wildlife Research Centre, Delta, British Columbia V4K 3N2, Canada
| | - Ken G Drouillard
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON N9B 3P4, Canada
| | - Kyle H Elliott
- Department of Natural Resource Sciences, McGill University, Ste. Anne de Bellevue, Quebec H9X 3V9, Canada
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85
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Miller A, Elliott JE, Elliott KH, Lee S, Cyr F. Temporal trends of perfluoroalkyl substances (PFAS) in eggs of coastal and offshore birds: Increasing PFAS levels associated with offshore bird species breeding on the Pacific coast of Canada and wintering near Asia. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:1799-808. [PMID: 25989421 DOI: 10.1002/etc.2992] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 12/31/2014] [Accepted: 03/11/2015] [Indexed: 05/22/2023]
Abstract
Perfluoroalkyl substances (PFAS) such as perfluoroalkyl carboxylates (PFCAs) and perfluoroalkyl sulfonates (PFSAs) have become virtually ubiquitous throughout the environment, and, based on laboratory studies, have known toxicological consequences. Various national and international voluntary phase-outs and restrictions on these compounds have been implemented over the last 10 to 15 years. In the present study, we examine trends (1990/1991-2010/2011) in aquatic birds (ancient murrelet, Synthliboramphus antiquus [2009 only]; Leach's storm-petrels, Oceanodroma leucorhoa; rhinoceros auklets, Cerorhinca monocerata; double-crested cormorants, Phalacrocorax auritus; and great blue herons, Ardea herodias). The PFCA, PFSA, and stable isotope (δ(15) N and δ(13) C) data collected from these species from the Pacific coast of Canada, ranging over 20 to 30 years, were used to investigate temporal changes in PFAS coupled to dietary changes. Perfluorooctane sulfonic acid (PFOS), the dominant PFSA compound in all 4 species, increased and subsequently decreased in auklet and cormorant eggs in line with the manufacturing phase-out of PFOS and perfluorooctanoic acid (PFOA), but concentrations continuously increased in petrel eggs and remained largely unchanged in heron eggs. Dominant PFCA compounds varied between the offshore and coastal species, with increases seen in the offshore species and little or variable changes seen in the coastal species. Little temporal change was seen in stable isotope values, indicating that diet alone is not driving observed PFAS concentrations.
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Affiliation(s)
- Aroha Miller
- Department of Applied Biology, University of British Columbia, Vancouver, British Columbia, Canada
| | - John E Elliott
- Department of Applied Biology, University of British Columbia, Vancouver, British Columbia, Canada
- Science and Technology Branch, Pacific Wildlife Research Centre, Environment Canada, Delta, British Columbia, Canada
| | - Kyle H Elliott
- Department of Natural Resource Sciences, McGill University, Sainte-Anne-de-Bellevue, Quebec, Canada
| | - Sandi Lee
- Science and Technology Branch, Pacific Wildlife Research Centre, Environment Canada, Delta, British Columbia, Canada
| | - Francois Cyr
- Environment Canada, National Wildlife Research Centre, Ottawa, Ontario, Canada
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86
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Jiménez S, Domingo A, Brazeiro A, Defeo O, Phillips RA. Marine debris ingestion by albatrosses in the southwest Atlantic Ocean. MARINE POLLUTION BULLETIN 2015; 96:149-154. [PMID: 25986654 DOI: 10.1016/j.marpolbul.2015.05.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 05/06/2015] [Accepted: 05/12/2015] [Indexed: 06/04/2023]
Abstract
Plastics and other marine debris affect wildlife through entanglement and by ingestion. We assessed the ingestion of marine debris by seven albatross species in the southwest Atlantic by analyzing stomach contents of birds killed in fisheries. Of the 128 specimens examined, including four Diomedea species (n=78) and three Thalassarche species (n=50), 21 (16.4%) contained 1-4 debris items, mainly in the ventriculus. The most common type was plastic fragments. Debris was most frequent in Diomedea species (25.6%) and, particularly, Diomedea sanfordi (38.9%) and very rare in Thalassarche species (2.0%), presumably reflecting differences in foraging behavior or distribution. Frequency of occurrence was significantly higher in male than female Diomedea albatrosses (39.3% vs. 18.0%). Although levels of accumulated debris were relatively low overall, and unlikely to result in gut blockage, associated toxins might nevertheless represent a health risk for Diomedea albatrosses, compounding the negative impact of other human activities on these threatened species.
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Affiliation(s)
- Sebastián Jiménez
- Recursos Pelágicos, Dirección Nacional de Recursos Acuáticos, Constituyente 1497, 11200 Montevideo, Uruguay; British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK; Proyecto Albatros y Petreles - Uruguay, Centro de Investigación y Conservación Marina (CICMAR), Uruguay.
| | - Andrés Domingo
- Recursos Pelágicos, Dirección Nacional de Recursos Acuáticos, Constituyente 1497, 11200 Montevideo, Uruguay
| | - Alejandro Brazeiro
- Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | - Omar Defeo
- UNDECIMAR, Departamento de Ecología & Evolución, Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
| | - Richard A Phillips
- British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK
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87
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Millow CJ, Mackintosh SA, Lewison RL, Dodder NG, Hoh E. Identifying bioaccumulative halogenated organic compounds using a nontargeted analytical approach: seabirds as sentinels. PLoS One 2015; 10:e0127205. [PMID: 26020245 PMCID: PMC4447384 DOI: 10.1371/journal.pone.0127205] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Accepted: 04/13/2015] [Indexed: 11/18/2022] Open
Abstract
Persistent organic pollutants (POPs) are typically monitored via targeted mass spectrometry, which potentially identifies only a fraction of the contaminants actually present in environmental samples. With new anthropogenic compounds continuously introduced to the environment, novel and proactive approaches that provide a comprehensive alternative to targeted methods are needed in order to more completely characterize the diversity of known and unknown compounds likely to cause adverse effects. Nontargeted mass spectrometry attempts to extensively screen for compounds, providing a feasible approach for identifying contaminants that warrant future monitoring. We employed a nontargeted analytical method using comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC×GC/TOF-MS) to characterize halogenated organic compounds (HOCs) in California Black skimmer (Rynchops niger) eggs. Our study identified 111 HOCs; 84 of these compounds were regularly detected via targeted approaches, while 27 were classified as typically unmonitored or unknown. Typically unmonitored compounds of note in bird eggs included tris(4-chlorophenyl)methane (TCPM), tris(4-chlorophenyl)methanol (TCPMOH), triclosan, permethrin, heptachloro-1'-methyl-1,2'-bipyrrole (MBP), as well as four halogenated unknown compounds that could not be identified through database searching or the literature. The presence of these compounds in Black skimmer eggs suggests they are persistent, bioaccumulative, potentially biomagnifying, and maternally transferring. Our results highlight the utility and importance of employing nontargeted analytical tools to assess true contaminant burdens in organisms, as well as to demonstrate the value in using environmental sentinels to proactively identify novel contaminants.
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Affiliation(s)
- Christopher J. Millow
- Ecology Program Area, Department of Biology, San Diego State University, San Diego, California, United States of America
- * E-mail:
| | - Susan A. Mackintosh
- Graduate School of Public Health, San Diego State University, San Diego, California, United States of America
- San Diego State University Research Foundation, San Diego, California, United States of America
| | - Rebecca L. Lewison
- Ecology Program Area, Department of Biology, San Diego State University, San Diego, California, United States of America
| | - Nathan G. Dodder
- Southern California Coastal Water Research Project Authority, Costa Mesa, California, United States of America
| | - Eunha Hoh
- Graduate School of Public Health, San Diego State University, San Diego, California, United States of America
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88
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Selke S, Auras R, Nguyen TA, Castro Aguirre E, Cheruvathur R, Liu Y. Evaluation of biodegradation-promoting additives for plastics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:3769-3777. [PMID: 25723056 DOI: 10.1021/es504258u] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Biodegradation-promoting additives for polymers are increasingly being used around the world with the claim that they effectively render commercial polymers biodegradable. However, there is a lot of uncertainty about their effectiveness in degrading polymers in different environments. In this study, we evaluated the effect of biodegradation-promoting additives on the biodegradation of polyethylene (PE) and polyethylene terephthalate (PET). Biodegradation was evaluated in compost, anaerobic digestion, and soil burial environments. None of the five different additives tested significantly increased biodegradation in any of these environments. Thus, no evidence was found that these additives promote and/or enhance biodegradation of PE or PET polymers. So, anaerobic and aerobic biodegradation are not recommended as feasible disposal routes for nonbiodegradable plastics containing any of the five tested biodegradation-promoting additives.
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Affiliation(s)
- Susan Selke
- †School of Packaging, Michigan State University, East Lansing, Michigan 48824, United States
| | - Rafael Auras
- †School of Packaging, Michigan State University, East Lansing, Michigan 48824, United States
| | - Tuan Anh Nguyen
- †School of Packaging, Michigan State University, East Lansing, Michigan 48824, United States
| | - Edgar Castro Aguirre
- †School of Packaging, Michigan State University, East Lansing, Michigan 48824, United States
| | - Rijosh Cheruvathur
- †School of Packaging, Michigan State University, East Lansing, Michigan 48824, United States
| | - Yan Liu
- ‡Biosystems and Agricultural Engineering, Michigan State University, East Lansing, Michigan 48824, United States
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89
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Zeng X, Chen X, Zhuang J. The positive relationship between ocean acidification and pollution. MARINE POLLUTION BULLETIN 2015; 91:14-21. [PMID: 25534629 DOI: 10.1016/j.marpolbul.2014.12.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 11/24/2014] [Accepted: 12/03/2014] [Indexed: 06/04/2023]
Abstract
Ocean acidification and pollution coexist to exert combined effects on the functions and services of marine ecosystems. Ocean acidification can increase the biotoxicity of heavy metals by altering their speciation and bioavailability. Marine pollutants, such as heavy metals and oils, could decrease the photosynthesis rate and increase the respiration rate of marine organisms as a result of biotoxicity and eutrophication, facilitating ocean acidification to varying degrees. Here we review the complex interactions between ocean acidification and pollution in the context of linkage of multiple stressors to marine ecosystems. The synthesized information shows that pollution-affected respiration acidifies coastal oceans more than the uptake of anthropogenic carbon dioxide. Coastal regions are more vulnerable to the negative impact of ocean acidification due to large influxes of pollutants from terrestrial ecosystems. Ocean acidification and pollution facilitate each other, and thus coastal environmental protection from pollution has a large potential for mitigating acidification risk.
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Affiliation(s)
- Xiangfeng Zeng
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xijuan Chen
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Jie Zhuang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN 37996, USA.
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90
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Champoux L, Rail JF, Lavoie RA, Hobson KA. Temporal trends of mercury, organochlorines and PCBs in northern gannet (Morus bassanus) eggs from Bonaventure Island, Gulf of St. Lawrence, 1969-2009. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2015; 197:13-20. [PMID: 25486601 DOI: 10.1016/j.envpol.2014.10.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 10/24/2014] [Accepted: 10/30/2014] [Indexed: 06/04/2023]
Abstract
Since 1969, northern gannet (Morus bassanus) eggs from Bonaventure Island, Québec, have been collected to monitor concentrations of contaminants. Levels of p,p'-DDE, which caused low breeding success of Bonaventure gannets in the 1960s, decreased by 99.4% from 1969 to 2009 (17.1-0.1 mg/kg ww), with concomitant improvement of hatching success. PCBs, most organochlorines and mercury also showed decreasing trends. Stable isotopes of carbon (δ(13)C) and nitrogen (δ(15)N) were measured to track the possible influence of diet changes on concentrations of contaminants over time. The confounding effect of the combustion of fossil fuels on baseline values of δ(13)C (the Suess effect) was taken into account. No temporal trends were observed in δ(13)C and δ(15)N values in gannet eggs. Hence trophic level or foraging area had a negligible influence on temporal trends of contaminants.
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Affiliation(s)
- Louise Champoux
- Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment Canada, Québec, Québec G1J 0C3, Canada.
| | - Jean-François Rail
- Canadian Wildlife Service, Environment Canada, Québec, Québec G1J 0C3, Canada.
| | - Raphael A Lavoie
- Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment Canada, Québec, Québec G1J 0C3, Canada; Biology Department, Queen's University, Kingston, Ontario, Canada.
| | - Keith A Hobson
- Wildlife and Landscape Science Directorate, Science and Technology Branch, Environment Canada, Saskatoon, SK S7N 0H4, Canada.
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91
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Miller A, Elliott JE, Elliott KH, Guigueno MF, Wilson LK, Lee S, Idrissi A. Brominated flame retardant trends in aquatic birds from the Salish Sea region of the west coast of North America, including a mini-review of recent trends in marine and estuarine birds. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 502:60-69. [PMID: 25241209 DOI: 10.1016/j.scitotenv.2014.09.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 09/02/2014] [Accepted: 09/02/2014] [Indexed: 06/03/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) increased in many matrices during the 1990s and early 2000s. Since voluntary restrictions and regulations on PBDEs were implemented in North America circa early 2000s, decreases in PBDEs have occurred in many of these same matrices. To examine temporal trends in the North Pacific, we retrospectively analysed PBDEs and eight non-PBDE flame retardants (FR) in eggs of two aquatic bird species, great blue herons, Ardea herodias, and double-crested cormorants, Phalacrocorax auritus, collected along the British Columbia coast, Canada from 1979 to 2012. Increasing PBDE concentrations were observed in both species followed by significant decreases post-2000 for all dominant congeners and ΣPBDE. Non-PBDE FRs were generally undetected in cormorant eggs, or detected at very low levels in heron eggs, except for hexabromocyclododecane (HBCDD). HBCDD, currently unregulated in North America, was not detected in early sampling years; however low concentrations were observed in both species in recent sampling years (2003-2012). Dietary tracers (δ(13)C and δ(15)N) did not change significantly over time, indicating that temporal changes in PBDEs are likely caused by implemented regulations. A comparison with recently published temporal trends of ΣPBDE in marine birds from North America and Europe is given.
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Affiliation(s)
- Aroha Miller
- Department of Applied Biology, University of British Columbia, 2357 Main Mall, Vancouver, BC, Canada
| | - John E Elliott
- Science and Technology, Environment Canada, Delta, BC V4K 3N2, Canada.
| | - Kyle H Elliott
- Department of Biology, University of Western Ontario, 1151 Richmond Street, London, ON N6A 3K7, Canada
| | - Mélanie F Guigueno
- Department of Biology, University of Western Ontario, 1151 Richmond Street, London, ON N6A 3K7, Canada
| | - Laurie K Wilson
- Canadian Wildlife Service, Pacific Wildlife Research Centre, Environment Canada, Delta, BC V4K 3N2, Canada
| | - Sandi Lee
- Science and Technology, Environment Canada, Delta, BC V4K 3N2, Canada
| | - Abde Idrissi
- Environment Canada, National Wildlife Research Centre, Ottawa, ON K1A 0H3, Canada
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92
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Lavoie RA, Baird CJ, King LE, Kyser TK, Friesen VL, Campbell LM. Contamination of mercury during the wintering period influences concentrations at breeding sites in two migratory piscivorous birds. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:13694-13702. [PMID: 25380025 DOI: 10.1021/es502746z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Many aquatic fish-eating birds migrate long distances and are exposed to different mercury concentrations ([Hg]) during their annual cycle. Here we examined the importance of migration on [Hg] in two colonial migratory fish-eating bird species. We determined temporal trends of [Hg] and stable isotopes of carbon (δ(13)C) and nitrogen (δ(15)N) during the annual cycle in Double-crested Cormorants (Phalacrocorax auritus) and Caspian Terns (Hydroprogne caspia) breeding in Lake Ontario by a repeated sampling of breast feathers and blood from recaptured individuals. We found an effect of previous winter [Hg], species, sex, and location to explain variations of Hg at breeding sites. This suggests Hg carryover from winter to summer periods and that variations of [Hg] in the summer are partially explained by [Hg] in the winter. Carryover of Hg among seasons and slow changes in [Hg] over time were found especially for individuals in high winter exposure groups, suggesting a slow depuration rate and a fast uptake rate for both species. In contrast, stable isotope values rapidly switched to reach equilibrium at a similar midpoint regardless of winter habitat or diet suggesting minimal carryover of isotopic signatures. The potential of Hg carryover from wintering sites indicates that Hg concentrations in birds at a given time may be influenced by previous exposure from distant locations.
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Affiliation(s)
- Raphael A Lavoie
- Biology Department, Queen's University , 116 Barrie Street, Kingston, Ontario, Canada K7L3N6
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93
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Miller A, Elliott JE, Elliott KH, Guigueno MF, Wilson LK, Lee S, Idrissi A. Spatial and temporal trends in brominated flame retardants in seabirds from the Pacific coast of Canada. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2014; 195:48-55. [PMID: 25194271 DOI: 10.1016/j.envpol.2014.08.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/06/2014] [Accepted: 08/08/2014] [Indexed: 06/03/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCDD) are bioaccumulative flame retardants. PBDEs increased in many ecosystems during the late 20th century, but recently have declined in some environments. To examine trends in the northern Pacific, we analysed PBDEs, HBCDD and carbon and nitrogen stable isotopes (δ13C and δ15N) to account for dietary effects in archived eggs of three seabird species from British Columbia, Canada, 1990-2011 (rhinoceros auklets, Cerorhinca monocerata; Leach's storm-petrels, Oceanodroma leucorhoa; ancient murrelets, Synthliboramphus antiquus, 2009 only). PBDEs increased until approximately 2000 and then decreased, while HBCDD increased exponentially throughout the examined period. No significant changes in dietary tracers were observed. HBCDD and ΣPBDE levels varied among species; ΣPBDE also varied among sites. Temporal changes in contaminant concentrations are unlikely to have been caused by dietary changes, and likely reflect the build-up followed by decreases associated with voluntary phase-outs and regulations implemented in North America to control PBDEs.
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Affiliation(s)
- Aroha Miller
- Department of Applied Biology, University of British Columbia, 2357 Main Mall, Vancouver, BC, Canada
| | - John E Elliott
- Science and Technology, Environment Canada, Delta, BC, V4K 3N2, Canada.
| | - Kyle H Elliott
- Department of Biology, University of Western Ontario, 1151 Richmond Street, London, ON, N6A 3K7, Canada
| | - Mélanie F Guigueno
- Department of Biology, University of Western Ontario, 1151 Richmond Street, London, ON, N6A 3K7, Canada
| | - Laurie K Wilson
- Canadian Wildlife Service, Pacific Wildlife Research Centre, Environment Canada, Delta, BC, V4K 3N2, Canada
| | - Sandi Lee
- Science and Technology, Environment Canada, Delta, BC, V4K 3N2, Canada
| | - Abde Idrissi
- Environment Canada, National Wildlife Research Centre, Ottawa, ON, K1A 0H3, Canada
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94
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Li B, Wu L, Li L, Seeger S, Zhang J, Wang A. Superwetting double-layer polyester materials for effective removal of both insoluble oils and soluble dyes in water. ACS APPLIED MATERIALS & INTERFACES 2014; 6:11581-11588. [PMID: 24956183 DOI: 10.1021/am502313h] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Inspired by the mussel adhesive protein and the lotus leaf, Ag-based double-layer polyester (DL-PET) textiles were fabricated for effective removal of organic pollutants in water. The DL-PET textiles are composed of a top superamphiphilic layer and a bottom superhydrophobic/superoleophilic layer. First, the PET textiles were modified with a layer of polydopamine (PDA) and deposited with Ag nanoparticles to form the PET@PDA@Ag textiles. The top superamphiphilic layer, formed by immobilizing Ag3PO4 nanoparticles on the PET@PDA@Ag textile, shows excellent visible-light photocatalytic activity. The bottom superhydrophobic/superoleophilic layer, formed by modifying the PET@PDA@Ag textile using dodecyl mercaptan, is mechanically, environmentally, and chemically very stable. The water-insoluble oils with low surface tension can penetrate both layers of the DL-PET textiles, while the water with soluble organic dyes can only selectively wet the top layer owing to their unique wettability. Consequently, the water-soluble organic contaminants in the collected water can be decomposed by the Ag3PO4 nanoparticles of the top layer under visible-light irradiation or even sunlight in room conditions. Thus, the DL-PET textiles can remove various kinds of organic pollutants in water including both insoluble oils and soluble dyes. The DL-PET textiles feature unique wettability, high oil/water separation efficiency, and visible-light photocatalytic activity.
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Affiliation(s)
- Bucheng Li
- Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou, 730000, P. R. China
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95
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Elliott KH, Davis M, Elliott JE. Equations for lipid normalization of carbon stable isotope ratios in aquatic bird eggs. PLoS One 2014; 9:e83597. [PMID: 24465384 PMCID: PMC3898914 DOI: 10.1371/journal.pone.0083597] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 11/13/2013] [Indexed: 11/19/2022] Open
Abstract
Stable isotope ratios are biogeochemical tracers that can be used to determine the source of nutrients and contaminants in avian eggs. However, the interpretation of stable carbon ratios in lipid-rich eggs is complicated because (13)C is depleted in lipids. Variation in (13)C abundance can therefore be obscured by variation in percent lipids. Past attempts to establish an algebraic equation to correct carbon isotope ratios for lipid content in eggs have been unsuccessful, possibly because they relied partly on data from coastal or migratory species that may obtain egg lipids from different habitats than egg protein. We measured carbon, nitrogen and sulphur stable isotope ratios in 175 eggs from eight species of aquatic birds. Carbon, nitrogen and sulphur isotopes were enriched in lipid-extracted egg samples compared with non extracted egg samples. A logarithmic equation using the C∶N ratio and carbon isotope ratio from the non extracted egg tissue calculated 90% of the lipid-extracted carbon isotope ratios within ±0.5‰. Calculating separate equations for eggs laid by species in different habitats (pelagic, offshore and terrestrial-influenced) improved the fit. A logarithmic equation, rather than a linear equation as often used for muscle, was necessary to accurately correct for lipid content because the relatively high lipid content of eggs compared with muscle meant that a linear relationship did not accurately approximate the relationship between percent lipids and the C∶N ratio. Because lipid extraction alters sulphur and nitrogen isotope ratios (and cannot be corrected algebraically), we suggest that isotopic measurement on bulk tissue followed by algebraic lipid normalization of carbon stable isotope ratio is often a good solution for homogenated eggs, at least when it is not possible to complete separate chemical analyses for each isotope.
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Affiliation(s)
- Kyle H. Elliott
- Department of Biological Sciences, University of Manitoba, Winnipeg, Canada
| | - Mikaela Davis
- Department of Biological Sciences, Simon Fraser University, Burnaby, Canada
| | - John E. Elliott
- Science & Technology Branch, Environment Canada, Delta, Canada
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96
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Zeng X, Yang J, Shi L, Li L, Gao M. Synthesis of multi-shelled ZnO hollow microspheres and their improved photocatalytic activity. NANOSCALE RESEARCH LETTERS 2014; 9:468. [PMID: 25328500 PMCID: PMC4200476 DOI: 10.1186/1556-276x-9-468] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Accepted: 08/27/2014] [Indexed: 05/09/2023]
Abstract
Herein, we report an effective, facile, and low-cost route for preparing ZnO hollow microspheres with a controlled number of shells composed of small ZnO nanoparticles. The formation mechanism of multiple-shelled structures was investigated in detail. The number of shells is manipulated by using different diameters of carbonaceous microspheres. The products were characterized by X-ray powder diffraction, scanning electron microscopy, and transmission electron microscopy. The as-prepared ZnO hollow microspheres and ZnO nanoparticles were then used to study the degradation of methyl orange (MO) dye under ultraviolet (UV) light irradiation, and the triple-shelled ZnO hollow microspheres exhibit the best photocatalytic activity. This work is helpful to develop ZnO-based photocatalysts with high photocatalytic performance in addressing environmental protection issues, and it is also anticipated to other multiple-shelled metal oxide hollow microsphere structures.
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Affiliation(s)
- Xiangyun Zeng
- Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, 730000 Lanzhou, People’s Republic of China
- School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, People’s Republic of China
| | - Jiao Yang
- Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, 730000 Lanzhou, People’s Republic of China
- School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, People’s Republic of China
| | - Liuxue Shi
- Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, 730000 Lanzhou, People’s Republic of China
- School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, People’s Republic of China
| | - Linjie Li
- Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, 730000 Lanzhou, People’s Republic of China
- School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, People’s Republic of China
| | - Meizhen Gao
- Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, 730000 Lanzhou, People’s Republic of China
- School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, People’s Republic of China
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97
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Hebert CE, Campbell D, Kindopp R, MacMillan S, Martin P, Neugebauer E, Patterson L, Shatford J. Mercury trends in colonial waterbird eggs downstream of the oil sands region of Alberta, Canada. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:11785-92. [PMID: 24070029 DOI: 10.1021/es402542w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Mercury levels were measured in colonial waterbird eggs collected from two sites in northern Alberta and one site in southern Alberta, Canada. Northern sites in the Peace-Athabasca Delta and Lake Athabasca were located in receiving waters of the Athabasca River which drains the oil sands industrial region north of Fort McMurray, Alberta. Temporal trends in egg mercury (Hg) levels were assessed as were egg stable nitrogen isotope values as an indicator of dietary change. In northern Alberta, California and Ring-billed Gulls exhibited statistically significant increases in egg Hg concentrations in 2012 compared to data from the earliest year of sampling. Hg levels in Caspian and Common Tern eggs showed a nonstatistically significant increase. In southern Alberta, Hg concentrations in California Gull eggs declined significantly through time. Bird dietary change was not responsible for any of these trends. Neither were egg Hg trends related to recent forest fires. Differences in egg Hg temporal trends between northern and southern Alberta combined with greater Hg levels in eggs from northern Alberta identified the likely importance of local Hg sources in regulating regional Hg trends. Hg concentrations in gull and Common Tern eggs were generally below generic thresholds associated with toxic effects in birds. However, in 2012, Hg levels in the majority of Caspian Tern eggs exceeded the lower toxicity threshold. Increasing Hg levels in eggs of multiple species nesting downstream of the oil sands region of northern Alberta warrant continued monitoring and research to further evaluate Hg trends and to conclusively identify sources.
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Affiliation(s)
- Craig E Hebert
- Environment Canada, Science and Technology Branch, National Wildlife Research Centre, Carleton University , 1125 Colonel By Drive, Ottawa, Ontario, Canada K1A 0H3
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Jing L, Zhou W, Tian G, Fu H. Surface tuning for oxide-based nanomaterials as efficient photocatalysts. Chem Soc Rev 2013; 42:9509-49. [DOI: 10.1039/c3cs60176e] [Citation(s) in RCA: 515] [Impact Index Per Article: 46.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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