Progress 01/08/20 to 09/30/20
Outputs
Target Audience:This project is highly technical in nature, studying the application of sophisticated instrumental analyses to natural systems. Although one of the target groups includes those scientists studying similar applications,the audience also includes decision makers and stakeholders in environmental and agricultural concerns. This year's work would be of particular interest to communities situated in the vicinity of highly contaminated mining and smeltering sites. These communities might include rural, suburban, and inner city neighborhoods near legacy industries or proposed disposal sites. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?Our research in cooperation with NASA has created the opportunity for one of my students to take part in an on-site internship at Johnson Space Center. This research should lead to others working directly with NASA. As a direct result of our projects, one of my students accepted a three-year paid internship at Engineer Research and Development Center (U.S. Corps of Engineers) at Vicksburg, Mississippi. How have the results been disseminated to communities of interest?Our research has reached our target audience(s) through professional publications;and international conferencethat waslive-streamed on YouTube, and outreadch activities. What do you plan to do during the next reporting period to accomplish the goals?
Nothing Reported
Impacts
What was accomplished under these goals?
Remediation of contaminated soils always has been a focus of my research, and this is continuing. In situ remediation of arsenic contaminated soils was the subject of two graduate student projects. We discovered that amorphous Fe oxides (from water treatment plants) can reduce the bioavailability and toxicity of As in soils. In contrast, adding phosphorus will release phosphorus from binding sites in the soil and enhance uptake by hyperaccumulating plants. Both are viable methods for low-cost but effective remediation. We are developing an integrated suite of methods for the quantification of amorphous solids in unconsolidated materials, including soils and simulants of lunar/Martian regoliths. Amorphous (non- or nano-crystalline) solids constitute from 10 to 80% of terrestrial and extraterrestrial soils and are highly surface reactive, but quantifying these materials is highly challenging. Knowledge of the fraction of these materials in target soils will provide critical information for applications from construction to remediation of contamination. This project is the focus of cooperative research with NASA but has applications to a project funded by U.S. Department of Defense concerning the stabilization of soils. In cooperation with the Department of Civil and Enviromental Engineering and in fulfillment of a grant from the Department of Defense, we are developing new binding (cementing) agents for stabilization of soils in roadbeds, building foundations, earthen dams, berms, and many other applications. Portland cement is the standard stabilization additive but has the disadvantage of having a huge carbon footprint and destructive to the soil resource. We are pursuing alternatives, particularly binding agents that are locally common, recyclable, and sustainable. Our first step has been to explore and modify existing magnesium phosphate cements (MPC). Preliminary results show that MPC stabilized soils have strengths similar to Portland cement stabilization. This research will be significant to the construction industry, emergency response, and environmentally by reduction of greenhouse gases.?
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2020
Citation:
Girgin, G., J.P. Muir, R.W. Jessup, A.P. Schwab. 2020. Dalea aurea, D. candida, D. multiflora and D. purpurea seedling herbage and root nitrogen and dry matter yield as influenced by soil type, phosphorus amendment and cowpea Rhizobium inoculant. Native Plants J. 21 (3), 341-352
- Type:
Journal Articles
Status:
Published
Year Published:
2020
Citation:
Pandey A., F. Dou, C.L.S. Morgan, J. Guo, J. Deng, P. Schwab. Organically fertilized flooded rice systems and its long-term effects on grain yield and methane emissions. Sci. Total Environ. 755: 145278. https://doi.org/10.1016/j.scitotenv.2020.142578
- Type:
Journal Articles
Status:
Published
Year Published:
2020
Citation:
Akula, P., D. Little, A.P. Schwab. 2020. Thermodynamic evaluation of smectite treated with hydrogen ion stabilizer. J. Matl. Civ. Engg. 32: 04020098 doi.org/10.1061/(ASCE)MT.1943-5533.0003186
- Type:
Journal Articles
Status:
Published
Year Published:
2020
Citation:
Banerjee, S., A. Bajpayee, M.F. Bakhsh, U. Zakira, A. Pandey, L.A. Ennab, Z. Rybokowski, M.K. Dixit, A.P. Schwab, N. Kalantar, B. Birgisson. 2020. In situ resource utilization and reconfiguration of soils into construction materials for the additive manufacturing of buildings. Frontiers in Materials. Volume 7, article 52 https://doi.org/10.3389/fmats.2020.00052
- Type:
Journal Articles
Status:
Published
Year Published:
2020
Citation:
Xu, Y, N. Porter, J. Foster, J. Muir, A.P. Schwab, B. Burson, R.W. Jessup. 2020. Silica production across candidate lignocellulosic biorefinery feedstocks. Agronomy 10(1) article 82
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2020
Citation:
Pandey, A., A.P. Schwab, and D. Little. 2020. Magnesium phosphate cement for rapid soil stabilization. First International Virtual Colloquium on Engineering, Sciences, and Technology and the Link with the Sustainable Development Goals. November 25, 2020. (virtual)
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2020
Citation:
Babirye, N., A.P. Schwab, J. Howe, G. Ganjegunte, and B.E. Herbert. 2020. The effects of oilfield brine on soil properties and plant growth. Soil Science Society of America Annual Meeting 2020, Soils and Environmental Quality Division (Oral presentation). Virtual
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2020
Citation:
Pandey, A., A.P. Schwab, D.W. Ming, J. Bullard, J. 2020. A Robust Technique for Quantification of Si and Al Abundances within the Amorphous Phase of Phyllosilicate-poor Palagonitic Samples. Soil Science Society of America Annual Meeting 2020, Soil Mineralogy Division (Oral presentation). Virtual
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2020
Citation:
Pandey, A., P. Schwab, D. Little, J. Bullard, D.W. Ming. 2020. Biomimicry of naturally occurring minerals to develop composites with the chemical, mineralogical, and engineering properties ideal for construction with soil. Soil Science Society of America Annual Meeting 2020, Astropedology Division (Oral presentation). Virtual
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2020
Citation:
Pandey, A., A.P. Schwab, D.W. Ming, E. Rampe. 2020. Comparison of chemical extraction methods with X-ray spectroscopic techniques to tabulate concentrations of Si and Al in the amorphous phase of phyllosilicate-poor palagonitic samples. Soil Science Society of America Annual Meeting 2020, Astropedology Division (Oral presentation). Virtual
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2020
Citation:
Pandey, A., P. Schwab, and D.W. Ming. 2020. Analysis of X-ray amorphous phase abundance and composition in basaltic samples as potential amendments for Martian soil analogues. Clay Minerals Society Annual Meetings. Virtual.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2020
Citation:
Schwab, A.P. 2020. Plant assimilation of polyaromatic hydrocarbons from contaminated soil. Soil Science Society of America Annual Meeting 2020, Soil Chemistry Division (Oral presentation). Virtual
- Type:
Theses/Dissertations
Status:
Published
Year Published:
2020
Citation:
Andrew C. Lee. Phytoremediation of arsenic and the immobilization of lead in soil: the impacts of apatite particle size.
|