Aqueous and Terrestrial Geochemistry Laboratory
Dredged Material Benefits for Crop Production and Environmental Implications
Dr. Angélica Vázquez-Ortega (PI) and Shannon Pelini (Co-PI)
This study proposes to identify the effects of dredged material on crop yield, metal bioaccumulation and ecological dynamics in crops and their invertebrate consumers and mutualists, and water quality in Lake Erie watershed soils.
The overall research objectives of the study are to: 1) identify the appropriate native soil to dredged material ratio to achieve the best crop yield, 2) use dredged material as a phosphate fertilizer source, 3) determine nutrient and metal release into soil solution, 4) determine metal bioaccumulation in crops and invertebrates in farm soils amended with dredged material, and 5) determine microcystin persistent in soils and bioaccumulation in corn grains. The ultimate goal of this project is to identify the optimal level of supplementation that achieves benefits of dredged material in agricultural systems surrounding Lake Erie.
Dredged material supplies essential plant nutrients and provide organic matter to agricultural soils that can further reduce fertilizer application costs. However, in order to achieve these benefits, we need to determine the appropriate quantity and quality of added dredged material in such a way that minimizes negative environmental impacts while maximizing benefits to crop management.
Enhancing nutrient removal from agricultural tile drainage by understanding the role of organic carbon quality
Dr. Angélica Vázquez-Ortega (PI) and Margaret Kalcic (Collaborator)
Nutrient and carbon distribution in agricultural soils subjected to different best management practices in Northwest Ohio
Dr. Angélica Vázquez-Ortega (PI)
Agricultural tile drainage in midwestern Ohio has significantly contributed to degrading water quality in Lake Erie. High loads of the nutrients phosphorus and nitrogen exported primarily by the Maumee River into the Western Lake Erie Basin have induced large, toxic, and long lasting harmful algal blooms (HABs) for nearly two decades.
In early August 2014, the Western Lake Erie Basin experienced a toxic bloom that left 500,000 people in Toledo without potable water service for nearly three days; this crisis further fueled public concerns about the health of the lake and brought the Great Lakes HABs into the national and international spotlight. The overall goal of my research is to investigate the nutrient distribution (nitrogen, phosphorus, and carbon) on agricultural soils subjected to different best management practices in NW Ohio. The specific objective is to perform a physico-chemical characterization of agricultural soils and relate nutrient retention to the soil mineralogical composition.
We hypothesize that nutrients will be retained to a higher extend in soils participating in BMPs versus those that are manage under conventional practices. Multiple biogeochemical processes such as 1) spatial inaccessibility, 2) aqueous complexation, 3) solid-solution partitioning, and 4) bio-uptake are involved in controlling the release of nutrients from soils. This study will provide information on nutrient partitioning into organic and inorganic mineral phases.
Perdrial, N., Vazquez-Ortega, A., Wang, G., Kanematsu, M., Mueller, K.T., Um, W., Steefel, C.I., O'Day, P.A., Chorover, J., 2018. Applied Geochemistry 89, 109-120.
Geochemical evolution of the Critical Zone across variable time scales informs concentration-discharge relationships: Jemez River Basin Critical Zone Observatory.
McIntosh, J.C., Schaumberg, C., Perdrial, J., Harpold, A., Vazquez-Ortega, A., Rasmussen, C., Vinson, D., Zapata-Rios, X., Brooks, P.D., Meixner, T., Pelletier, J., Derry, L., Chorover, J., 2017. Water Resources Research 53 (5), 4169-4196.
U-series isotopic signatures of soils and headwater streams in a semi-arid complex volcanic terrain.
Huckle, D., Ma, L., McIntosh, J., Vazquez-Ortega, A., Rasmussen, C., Chorover, J., 2016. Chemical Geology 445, 68-83.
Vazquez-Ortega, A., Perdrial, J., Harpold, A., Zapata-Rios, X., Rasmussen, C., McIntosh, J., Schaap, M., Pelletier, J.D., Brooks, P.D., Amistadi, M.K., Chorover, J., 2015. Chemical Geology 391, 19-32.
Vazquez-Ortega, A., Hernandez-Ruiz, S., Amistadi, M.K., Rasmussen, C., Chorover, J., 2014. Vadose Zone Journal 13 (7).
Perdrial, J.N., Perdrial, N., Vazquez-Ortega, A., Porter, C., Leedy, J., Chorover, J., 2014. Soil Science Society of America Journal 78 (2), 486-495.
The influence of goethite and gibbsite on soluble nutrient dynamics and microbial community composition.
Heckman, K., Welty-Bernard, A., Vazquez-Ortega, A., Schwartz, E., Chorover, J., Rasmussen, C., 2013. Biogeochemistry 112 (1-3), 179-195.
|ENVS 1010||Introduction to Environmental Studies|
|ENVS 3040||Water Quality in the Environment|
|SEES 4800/5800:||Introduction to Biogeochemistry|