Keyword search (4,163 papers available)

"Sci Total Environ" Category Publications:

Title Authors PubMed ID
1 Analysis of biochar-mortar composite as a humidity control material to improve the building energy and hygrothermal performance. Park JH, Kim YU, Jeon J, Yun BY, Kang Y, Kim S 33611181
ENCS
2 Role of organic matter and microbial communities in mercury retention and methylation in sediments near run-of-river hydroelectric dams. Millera Ferriz L, Ponton DE, Storck V, Leclerc M, Bilodeau F, Walsh DA, Amyot M 33609815
BIOLOGY
3 Assessing the impact of COVID-19 pandemic on urban transportation and air quality in Canada. Tian X, An C, Chen Z, Tian Z 33401062
ENCS
4 PM2.5 and hospital admissions among Medicare enrollees with chronic debilitating brain disorders. Yitshak-Sade M, Nethery R, Schwartz JD, Mealli F, Dominici F, Di Q, Abu Awad Y, Ifergane G, Zanobetti A 33065503
PSYCHOLOGY
5 Removal of arsenic from water through ceramic filter modified by nano-CeO2: A cost-effective approach for remote areas. Yang X; Huang G; An C; Chen X; Shen J; Yin J; Song P; Xu Z; Li Y; 33182193
ENCS
6 A comprehensive investigation of industrial plastic pellets on beaches across the Laurentian Great Lakes and the factors governing their distribution. Corcoran PL, de Haan Ward J, Arturo IA, Belontz SL, Moore T, Hill-Svehla CM, Robertson K, Wood K, Jazvac K 32781316
CONCORDIA
7 The dark cloud with a silver lining: Assessing the impact of the SARS COVID-19 pandemic on the global environment. Lal P, Kumar A, Kumar S, Kumari S, Saikia P, Dayanandan A, Adhikari D, Khan ML 32408041
BIOLOGY
8 The NSERC Canadian Lake Pulse Network: A national assessment of lake health providing science for water management in a changing climate. Huot Y, Brown CA, Potvin G, Antoniades D, Baulch HM, Beisner BE, Bélanger S, Brazeau S, Cabana H, Cardille JA, Del Giorgio PA, Gregory-Eaves I, Fortin MJ, Lang AS, Laurion I, Maranger R, Prairie YT, Rusak JA, Segura PA, Siron R, Smol JP, Vinebrooke RD, Walsh DA 31419692
BIOLOGY
9 Treatment of rural domestic wastewater using multi-soil-layering systems: Performance evaluation, factorial analysis and numerical modeling. Song P, Huang G, An C, Shen J, Zhang P, Chen X, Shen J, Yao Y, Zheng R, Sun C 29990903
ENCS
10 Simulating micro-scale thermal interactions in different building environments for mitigating urban heat islands. Chatterjee S, Khan A, Dinda A, Mithun S, Khatun R, Akbari H, Kusaka H, Mitra C, Bhatti SS, Doan QV, Wang Y 30731408
ENCS
11 Anthropogenic and natural methane emissions from a shale gas exploration area of Quebec, Canada. Pinti DL, Gelinas Y, Moritz AM, Larocque M, Sano Y 27267724
CHEMBIOCHEM

 

Title:Role of organic matter and microbial communities in mercury retention and methylation in sediments near run-of-river hydroelectric dams.
Authors:Millera Ferriz L,  Ponton DE,  Storck V,  Leclerc M,  Bilodeau F,  Walsh DA,  Amyot M
Link:https://www.ncbi.nlm.nih.gov/pubmed/33609815
DOI:10.1016/j.scitotenv.2021.145686
Publication:The Science of the total environment
Keywords:
PMID:33609815 Category:Sci Total Environ Date Added:2021-02-21
Dept Affiliation: BIOLOGY
1 Département de sciences biologiques, Université de Montréal, Montreal H2V 2S9, QC, Canada; Biology Department, Concordia University, Montreal H4B 1R6, QC, Canada; GRIL, Groupe de Recherche Interuniversitaire en Limnologie, Département de sciences biologiques, Université de Montréal, Campus MIL, Montreal H3C 3J7, QC, Canada.
2 Département de sciences biologiques, Université de Montréal, Montreal H2V 2S9, QC, Canada; GRIL, Groupe de Recherche Interuniversitaire en Limnologie, Département de sciences biologiques, Université de Montréal, Campus MIL, Montreal H3C 3J7, QC, Canada.
3 Département de sciences biologiques, Université de Montréal, Montreal H2V 2S9, QC, Canada; Biology Department, Concordia University, Montreal H4B 1R6, QC, Canada.
4 Hydro-Québec Production, Environment Department, Montreal, QC, Canada.
5 Biology Department, Concordia University, Montreal H4B 1R6, QC, Canada; GRIL, Groupe de Recherche Interuniversitaire en Limnologie, Département de sciences biologiques, Université de Montréal, Campus MIL, Montreal H3C 3J7, QC, Canada.
6 Département de sciences biologiques, Université de Montréal, Montreal H2V 2S9, QC, Canada; GRIL, Groupe de Recherche Interuniversitaire en Limnologie, Département de sciences biologiques, Université de Montréal, Campus MIL, Montreal H3C 3J7, QC, Canada. Electronic address: m.amyot@umontreal.ca.

Description:

Role of organic matter and microbial communities in mercury retention and methylation in sediments near run-of-river hydroelectric dams.

Sci Total Environ. 2021 Feb 06; 774:145686

Authors: Millera Ferriz L, Ponton DE, Storck V, Leclerc M, Bilodeau F, Walsh DA, Amyot M

Abstract

Run-of-river power plants (RoRs) are expected to triple in number over the next decades in Canada. These structures are not anticipated to considerably promote the mobilization and transport of mercury (Hg) and its subsequent microbial transformation to methylmercury (MeHg), a neurotoxin able to biomagnify in food webs up to humans. To test whether construction of RoRs had an effect on Hg transport and transformation, we studied Hg and MeHg concentrations, organic matter contents and methylating microbial community abundance and composition in the sediments of a section of the St. Maurice River (Quebec, Canada). This river section has been affected by the construction of two RoR dams and its watershed has been disturbed by a forest fire, logging, and the construction of wetlands. Higher total Hg (THg) and MeHg concentrations were observed in the surface sediments of the flooded sites upstream of the RoRs. These peaks in THg and MeHg were correlated with organic matter proportions in the sediments (r2 = 0.87 and 0.82, respectively). In contrast, the proportion of MeHg, a proxy for methylation potential, was best explained by the carbon to nitrogen ratio suggesting the importance of terrigenous organic matter as labile substrate for Hg methylation in this system. Metagenomic analysis of Hg-methylating communities based on the hgcA functional gene marker indicated an abundance of methanogens, sulfate reducers and fermenters, suggesting that these metabolic guilds may be primary Hg methylators in these surface sediments. We propose that RoR pondages act as traps for sediments, organic matter and Hg, and that this retention can be amplified by other disturbances of the watershed such as forest fire and logging. RoR flooded sites can be conducive to Hg methylation in sediments and may act as gateways for bioaccumulation and biomagnification of MeHg along food webs, particularly in disturbed watersheds.

PMID: 33609815 [PubMed - as supplied by publisher]




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