Article
Environmental Sciences
Hermann A. Kabore, Ken Goeury, Melanie Desrosiers, Sung Vo Duy, Jinxia Liu, Gilbert Cabana, Gabriel Munoz, Sebastien Sauve
Summary: This study examined the impact of Montreal wastewater treatment plant effluents on two top predators, Walleye and Sauger. The results showed that the effluents significantly affected the isotopic signatures of the fish species. Additionally, high levels of PFAS, particularly PFSA, were found in the St. Lawrence River.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Food Science & Technology
Alexander G. G. Dvoretsky, Fatima A. A. Bichkaeva, Olga S. S. Vlasova, Sergei V. V. Andronov, Vladimir G. G. Dvoretsky
Summary: We analyzed the fatty acid composition of northern pike muscles from Gyda River in Siberia, Russia using gas-liquid chromatography. Out of the 43 identified fatty acids, 23 accounted for 99.3% of the total content. The fatty acid profile differed from other pike populations, possibly due to diet variations. Pike flesh had desirable nutritional qualities with a low n-6/n-3 ratio, low atherogenic and thrombogenic indices, and a high ratio of hypocholesterolemic to hypercholesterolemic fatty acids, making it a suitable replacement for traditional fish sources.
Article
Engineering, Environmental
Abigaelle Dalpe Castilloux, Magali Houde, Andree Gendron, Amila De Silva, Youssouf Djibril Soubaneh, Zhe Lu
Summary: The study on the St. Lawrence River showed that BHTQ was the dominant contaminant in dissolved water, and sediment had higher sorption capacities for most target contaminants compared to SPM. Different contamination profiles were found in lake sturgeon and northern pike, indicating that the accumulation of UVAs and IAs in fish depends on their feeding behavior.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Magella Pelletier, Laurie Isabel, Alain Armellin, Tana McDaniel, Pamela Martin, Daryl McGoldrick, Mandi Clark, Serge Moore
Summary: The bioaccumulation of cyclic volatile methylsiloxanes and linear siloxanes in a food web downstream of a wastewater treatment plant in Montreal, Canada was studied. The study found significant differences in ΔN-15 in fish and prey influenced by the wastewater plume compared to those feeding outside the plume. The predominant cyclic siloxane detected was D5, and total siloxane concentrations in suspended sediments were significantly higher in the effluent plume area of the river.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Duc Huy Dang, Lan Ma, Quang Khai Ha, Wei Wang
Summary: Differentiating anthropogenic signatures from natural processes is crucial for environmental regulation. This study investigates the variations in chemical concentrations and trace elements in different water masses along the St. Lawrence River-Estuary continuum, and analyzes the impact of wastewater discharge and the sources of minor elements.
Article
Environmental Sciences
Autumn Osgood, Evie S. Brahmstedt, Matthew J. S. Windle, Thomas M. Holsen, Michael R. Twiss
Summary: This study found that mercury levels in fish from riparian wetlands in the Upper St. Lawrence River were significantly higher than those from non-wetland habitats, indicating that riparian wetlands pose a risk as a source of mercury to fish. This has important implications for both wildlife preservation and fish consumption advisories for public health concerns.
Article
Agricultural Engineering
Florian Paillet, Carole Barrau, Renaud Escudie, Nicolas Bernet, Eric Trably
Summary: Effluent recycling with systematic heat shock treatment significantly improves the stability and productivity of fermentative hydrogen production from organic waste, leading to a stable bacterial community structure dominated by hydrogen and lactate-producing bacteria.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Lars Schreiber, Nathalie Fortin, Alberto Mazza, Christine Maynard, Jessica Wasserscheid, Julien Tremblay, Kenneth Lee, Charles W. Greer
Summary: This study investigates the residual oil and habitat recovery in the Ste. Croix wetland in Eastern Canada after an experimental oil spill in 1999. The results show that after 21 years, the sediments in the test plots, regardless of the countermeasures taken, can be considered completely recovered.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Peiyuan Deng, Xiaojia Hu, Wentao Cai, Zuoxu Zhang, Yuli Zhang, Yihe Huang, Yingying Yang, Changkan Li, Shu Ai
Summary: The presence of antibiotic resistance genes (ARGs) and heavy metal resistance genes (MRGs) in the municipal wastewater treatment plant and its adjacent river sediments has been investigated. Results showed that internal DNA had higher absolute abundances of ARGs and MRGs compared to external DNA in the wastewater treatment plant, while the opposite was observed in river sediments. Aminoglycoside resistance genes were found to be the most abundant ARGs, while the zntA gene was one of the most abundant MRGs. The presence of the mobile genetic element intI1 was positively correlated with the proliferation of resistance genes in both internal and external DNA. This widespread distribution of ARGs, MRGs, and MGEs provides insights into the transmission routes and highlights the importance of monitoring and mitigating their dissemination.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Gabriel Munoz, Laurie Mercier, Sung Vo Duy, Jinxia Liu, Sebastien Sauve, Magali Houde
Summary: The research investigates the presence of various PFAS in the food web of the St. Lawrence River and discovers emerging PFAS as well. It also finds differences in contamination profiles of PFAS among different biotic samples and identifies some PFAS as highly bioaccumulative and biomagnifying.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Silvia Gibellini, Hani Abu Qdais, Mentore Vaccari
Summary: The Syrian civil war resulted in over a million refugees settling in the Northern Governorates of Jordan, putting significant pressure on local services and infrastructure, particularly solid waste management. A study showed a deterioration in solid waste management in the Greater Irbid Municipality between 2011 and 2016, with increased costs and decreased citizen satisfaction. Efforts from international donors are being made to address the growing demand for basic solid waste services, but there is still much work to be done.
WASTE MANAGEMENT & RESEARCH
(2022)
Article
Environmental Sciences
Valerie Ouellet, Andre St-Hilaire, Yves Secretan, Marc Mingelbier, Jean Morin, Stephen J. Dugdale
Summary: The study found that high water temperatures led to a massive fish mortality event in the St. Lawrence River in 2001. Suitable spawning habitats for common carp were severely affected, reducing to less than 15% of the potential suitable habitat.
Article
Biodiversity Conservation
Sebastian Szklarek, Edyta Kiedrzynska, Marcin Kiedrzynski, Joanna Mankiewicz-Boczek, William J. Mitsch, Maciej Zalewski
Summary: This study aimed to conduct an ecotoxicological evaluation of treated wastewater and river water, finding small WWTPs to be the highest source of hazard. The lack of ecotoxicological information resulted in the traditional physicochemical parameters providing an incomplete picture of water quality.
ECOLOGICAL INDICATORS
(2021)
Article
Marine & Freshwater Biology
Zofia E. Taranu, Pierre Legendre, Edith Cusson, Bernadette Pinel-Alloul
Summary: This study examined the impact of river-scale hydrological network and local aquatic environment on the distribution of crustacean zooplankton along the biogeographical zones of the St. Lawrence River. The results showed that the spatial distribution patterns were closely related to the flow network and environmental conditions.
Article
Ecology
Evie S. Brahmstedt, Carla N. Ayala Crespo, Thomas M. Holsen, Michael R. Twiss
Summary: Legacy mercury in Upper St. Lawrence River wetland hydric soils is mainly affected by a new water level management plan, potentially altering the distribution of mercury within plant communities. Organic detritus is found to contribute the most to the overall mercury burden in these wetlands.
