T62 Groundwater Pollution with Arsenic and Other Geogenic Legacy Contaminants, Related Health Risks and Management II: Advancing Learning through Geospatial Tools, Machine Learning, Data Science, and Artificial Intelligence

Sunday, 22 September 2024
1:30 PM - 5:30 PM
211A

CO-TRANSPORT AND DEPOSITION OF BIOCHAR AND ARSENIC THROUGH SATURATED POROUS MEDIA

Paper number: T62-6
Program: Technical Sessions
Time: 2:35 PM – 2:50 PM

Authors

Abstract

Arsenic contamination poses significant environmental concerns due to its toxicity and potential impacts on human health. This research work aims to investigate and model co-transport and deposition of arsenic and biochar (raw and iron-modified) in saturated porous media using HYDRUS-1D under the effects of pH (5.5-10.5), ionic strength (0-10 mM), arsenic concentrations (5-10 mg/L), and biochar dosage (50-100 mg/L). Results stated that high concentrations of arsenic have been deposited at 0 mM, whereas an increase in ionic strength of 10 mM mobilizes arsenic in saturated porous media. Besides, high biochar has been deposited in saturated porous media at the increase in ionic strength due to biochar aggregation and ionic effects. Understanding the fate and remediation of arsenic in saturated porous media is crucial for effective transport and deposition. Overall, raw and iron-modified biochars act as carriers for arsenic in saturated porous media and facilitate adsorption onto their active sites during their co-transport and deposition governed by solution chemistry.

Geological Society of America Abstracts with Programs. Vol. 56, No. 5

doi: 10.1130/abs/2024AM-403720

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