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Metal Exposure, Bioaccumulation, and Toxicity Assessment in Sediments from the St. Lawrence River Before and After Remediation Using a Resuspension Technique

Author(s): Javid M; Mulligan CN; Lefranc M; Rosabal Rodriguez M;

This study, using Hyalella azteca and Chironomus riparius, evaluated the effects of exposure to heavy metal-contaminated sediments collected from the study area under three conditions: before remediation, after remediation, and suspended particulate matter (SPM). The selected toxicity tests allowed for the evaluation of biological responses across varying ...

Article GUID: 40559906


Sustainable Recovery of Critical Minerals from Wastes by Green Biosurfactants: A Review

Author(s): Deravian B; Mulligan CN;

Biosurfactants have emerged as promising agents for environmental remediation due to their ability to complex, chelate, and remove heavy metals from contaminated environments. This review evaluates their potential for recovering critical minerals from waste materials to support renewable energy production, emphasizing the role of biosurfactant-metal inter ...

Article GUID: 40509347


Radiation tolerance and biodegradation performance of a marine bacterium Acinetobacter sp. Y9 in radioactive composite oil-contaminated wastewater

Author(s): Yan J; Luo Q; Zhu B; Chen Z; Chen Q;

The tolerance and degradation characteristics of a marine oil-degrading strain Acinetobacter sp. Y9 were investigated in the presence of diesel oil and simulated radioactive nuclides (Mn2+, Co2+, Ni2+, Sr2+, Cs+) at varying concentrations, as well as exposure to ?-ray radiation (Co-60). The maximum tolerable concentrations for Co2+and Ni2+ were found to b ...

Article GUID: 39806541


Emerging hazardous chemicals and biological pollutants in Canadian aquatic systems and remediation approaches: A comprehensive status report

Author(s): Adeola AO; Paramo L; Fuoco G; Naccache R;

Emerging contaminants can be natural or synthetic materials, as well as materials of a chemical, or biological origin; these materials are typically not controlled or monitored in the environment. Canada is home to nearly 7 % of the world's renewable water supply and a wide range of different kinds of water systems, including the Great Lake, rivers, c ...

Article GUID: 39278485


Mechanisms and controlling factors of heavy metals removal by electroflocculation in estuarine environments

Author(s): Hadikhani R; Karbassi A; Tajziehchi S; Mehdizadeh Y;

Estuaries play a crucial role in preventing the influx of metals from rivers into seas, thereby offering potential insights for the water purification industry. This study seeks to identify the key parameters (including pH, electricity conductivity (EC), and Eh) influencing the removal efficiency of Mn, Zn, Cu, Co, and Ni during natural and electro-floccu ...

Article GUID: 38991606


Cumulative Effects of Watershed Disturbances and Run-of-river Dams on Mercury Cycling: Case Study and Recommendations for Environmental Managers

Author(s): Amyot M; Bilodeau F; Tremblay A; Planas D; Walsh D; Ponton DE;

Run-of-river power plants (ROR) represent the majority of hydroelectric plants worldwide. Their environmental impacts are not well documented and are believed to be limited, particularly regarding the contamination of food webs by methylmercury (MeHg), a neurotoxin. RORs are typically installed in small rivers where combined effects of watershed disturban ...

Article GUID: 38775830


The Effect of Linker-to-Metal Energy Transfer on the Photooxidation Performance of an Isostructural Series of Pyrene-Based Rare-Earth Metal-Organic Frameworks

Author(s): Quezada-Novoa V; Titi HM; Villanueva FY; Wilson MWB; Howarth AJ;

The tetratopic linker, 1,3,6,8-tetrakis(p-benzoic acid)pyrene (H4 TBAPy) along with rare-earth (RE) ions is used for the synthesis of 9 isostructures of a metal-organic framework (MOF) with shp topology, named RE-CU-10 (RE = Y(III), Gd(III), Tb(III), Dy(III), Ho(III), Er(III), Tm(III), Yb(III), and Lu(III)). The synthesis of each RE-CU-10 analogue require ...

Article GUID: 37116124


Artificial aging induced changes in biochar,s properties and Cd2+ adsorption behaviors

Author(s): Wang Z; Bian Y; Xu Y; Zheng C; Jiang Q; An C;

id="eng-abstract">
Fresh biochar has been widely applied to the remediation of heavy metals in soil by its property of adsorption, but the changes in its physicochemical properties and in situ adsorption performance over time cannot be ignored. In this study, the sorption of Cd<sup>2+</sup> by corn straw biochars (CB) and mun ...

Article GUID: 36251198


Seasonal source identification and source-specific health risk assessment of pollutants in road dust

Author(s): Wang J; Huang JJ; Mulligan C;

Humans who are exposed to metals in road dust may have potential health risks through touching, ingesting, and inhaling the suspended road dust. There were limited studies to link seasonal emission sources to health risks from metals in road dust. In this study, metals in road dust from different functional areas were seasonally monitored. The contributio ...

Article GUID: 34510345


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