A5045913222- Heavy metals in environment
- Mine drainage and remediation techniques
- Soil and Water Nutrient Dynamics
- Carbon Dioxide Capture Technologies
- Smart Materials for Construction
- CO2 Sequestration and Geologic Interactions
- Fish Ecology and Management Studies
- Groundwater flow and contamination studies
- Methane Hydrates and Related Phenomena
- Integrated Water Resources Management
- Water Quality and Resources Studies
- Hydraulic Fracturing and Reservoir Analysis
- Groundwater and Isotope Geochemistry
- Ocean Acidification Effects and Responses
Dalhousie University
2019-2024
Addition of alkalinity to rivers is a previously unexplored but promising new tool aid our global mission reduce serious risks from climate change while restoring aquatic habitats.
Abstract. Acid deposition released large amounts of aluminium into streams and lakes during the last century in northern Europe eastern North America. Elevated concentrations caused major environmental concern due to aluminium's toxicity terrestrial aquatic organisms led extirpation wild Atlantic salmon populations. Air pollution reduction legislation that began 1990s America successfully reduced acid deposition, problem was widely considered solved. However, accumulating evidence indicates...
Increased rates of acid deposition derived from the burning fossil fuels over last century have resulted in acidification and increase aluminum (Al) levels freshwaters soils sensitive areas. While surface waters such as lakes rivers has been extensively studied, status resulting Al concentrations groundwater are poorly understood. Here we aim to describe distribution across province Nova Scotia, Canada. We investigate hydrogeological conditions that influence compare legislated threshold for...
Abstract Elevated concentrations of toxic cationic aluminum (Ali) are symptomatic terrestrial and freshwater acidification particularly to salmonid fish species such as Atlantic salmon (Salmo salar). Speciated metal samples rarely included in standard water monitoring protocols, therefore the processes affecting Ali dynamics remain poorly understood. Previous analysis Nova Scotia (Canada) rivers found that majority study had exceeding threshold for aquatic health, but a wide-scale survey has...
Abstract. Cationic aluminium species are toxic to terrestrial and aquatic life. Despite decades of acid emission reductions, accumulating evidence shows that freshwater acidification recovery is delayed in locations such as Nova Scotia, Canada. Further, spatial temporal patterns labile cationic forms (Ali) remain poorly understood. Here we increase our understanding Ali by measuring concentrations ten streams acid-sensitive areas Scotia over a four-year time period. We observe widespread...
Populations of Atlantic salmon (Salmo salar) in Nova Scotia have plummeted recent decades. One the major threats for these populations is freshwater acidification, which has caused toxic water conditions including elevated stream concentrations cationic aluminum (Ali). The only viable management option to reduce acidification within timeline needed save remaining addition alkaline materials waters or soils, via “liming.” While studies Europe, UK, and northeastern USA show that Ali decrease...
Populations of Atlantic salmon (Salmo salar) in Nova Scotia have plummeted recent decades. One the major threats for these populations is freshwater acidification, which has caused toxic water conditions including elevated stream concentrations cationic aluminum (Ali). The only viable management option to reduce acidification within timeline needed save remaining addition alkaline materials waters or soils, via “liming.” While studies Europe, UK, and northeastern USA show that Ali decrease...
Effective carbon dioxide removal (CDR) strategies are urgently needed to reduce risks of climate change. Here we propose a new strategy for Ocean Alkalinity Enhancement that targets the land-to-ocean component inorganic carbon cycle: river-based alkalinity and weathering enhancement (RAWE). RAWE adapts freshwater acidification mitigation technology capture CO2 through mineral by increasing rivers’ capacity retain transport bicarbonate long-term storage in ocean....
<p>Acidified rivers may have increased CO<sub>2</sub> emissions because their low pH transforms inorganic carbon in the form of bicarbonate anions to CO<sub>2</sub>, which can evade atmosphere, thus interrupting delivery oceans, a key flux long-term carbonate silicate cycle. Enhanced weathering (EW) is dioxide removal (CDR) strategy aiming increase drawdown atmospheric through accelerated carbonation crushed minerals with...