Data for Spectral Induced Polarization Monitoring and Reactive Transport Modeling of Cr(VI) Remediation with ZVI-AC Mixtures

# README for Spectral Induced Polarization Monitoring and Reactive Transport Modeling of Cr(VI) Remediation with ZVI-AC Mixtures ## OverviewThis database contains experimental and simulation data related to chromium remediation experiments conducted in sand columns. The dataset includes hydrogeochemical data, energy-dispersive X-ray spectroscopy (EDS) data, Hydraulic conductivity, and Spectral Induced Polarization (SIP) data, as well as reactive transport simulation results. ## File Descriptions ### 1. Hydrogeochemical Data (hydrogeochemical_data.txt)This file contains hydrogeochemical data from two sampling points (lower and upper) in sand columns for Case 1 and Case 2. Data were collected over a period of 0-42.7 days. Each dataset is organized into five columns:- Sampling Time (days)- Total Chromium Concentration (Cr_t, mg/L)- Hexavalent Chromium Concentration (Cr(VI), mg/L)- Electrical Conductivity (S/m)- pH ### 2. EDS data (eds_scan.txt)This file contains EDS line scan results for solid samples collected from the lower and upper parts of the columns after the experiments for Case 1 and Case 2. Each dataset is organized into six columns:- Scanning Distance- Scanning Intensities for Five Different Elements (cps) ### 3. Hydraulic Conductivity Data for Case 2 (hydraulic_conductivity.txt)This file contains hydraulic conductivity data for Case 2. The data is organized into three columns:- Measurement Time (0-42.7 days)- Hydraulic conductivity for Lower Zone (m/d)- Hydraulic conductivity for Upper Zone (m/d) ### 4. Spectral Induced Polarization (SIP) Data (sip_data.txt)This file contains SIP data from four measurement channels (M1-M4) in the columns for Case 1 and Case 2, collected over a period of 0-42.7 days. Each dataset is organized such that the first column is the measurement frequency (0.01-1000 Hz), and subsequent columns contain phase or conductivity amplitude data for different monitoring times. ### 5. Simulated Concentration Data for Case 1 (simulation_case1.txt)This file contains simulated hexavalent chromium concentration data for Case 1 under two calibration strategies. Each dataset is organized into five columns:- Simulation Time (days)- Simulated Hexavalent Chromium Concentrations for Four Sections (M1-M4, from bottom to top, mg/L) ### 6. Simulated Concentration Data for Case 2 (simulation_case2.txt)This file contains simulated hexavalent chromium concentration data for Case 2 under two calibration strategies. Each dataset is organized into five columns:- Simulation Time (days)- Simulated Hexavalent Chromium Concentrations for Four Sections (M1-M4, from bottom to top, mg/L) ## Data UsageTo analyze the data, you can import the CSV or Excel files into data analysis tools such as Python, MATLAB, or Excel. The spectral data can be incorporated into various fitting models, such as the Cole-Cole model. For reference, an open-source code implementation of the Cole-Cole model fitting can be found at: [Cole-Cole-fit](https://github.com/m-weigand/Cole-Cole-fit). This code can be used to obtain parameters such as low-frequency conductivity, high-frequency conductivity, chargeability, relaxation time, and the Cole-Cole exponent.