Creating synthetic wastewater that mimics the characteristics of real mine water for research purposes can be a complex task. You'll need to carefully mix various chemicals in specific proportions to match the desired parameters. Here's a general guide to create synthetic wastewater that matches the parameters you've provided:

1. Determine the Chemicals:

• To create synthetic wastewater, you'll need to source chemicals that can replicate the parameters you've mentioned.

2. Calculate Concentrations:

• You need to calculate the concentrations of each chemical required to achieve the desired parameters. This involves stoichiometry and chemical equilibrium calculations.

3. Safety Precautions:

• Be sure to follow safety guidelines when working with chemicals. Use appropriate personal protective equipment.

4. Mixing Procedure:

• Prepare a container large enough to hold the desired volume of synthetic wastewater.

5. Adjust pH:

• To match the pH of 3.90, you'll likely need to use strong acids (e.g., sulfuric acid) or strong bases (e.g., sodium hydroxide). Add these reagents while monitoring the pH until you reach the desired level.

6. Add Ionic Components:

• Add chemicals to match the concentrations of sulfate (SO4), aluminum (Al), calcium (Ca), magnesium (Mg), manganese (Mn), potassium (K), and sodium (Na). This may involve the use of sulfate salts, such as sodium sulfate, and various metal salts to reach the desired concentrations. Ensure that you perform stoichiometric calculations to determine the quantities required.

7. Add Non-Ionic Components:

• Add chemicals to match the concentrations of electrical conductivity (EC), oxidation-reduction potential (ORP), total suspended solids (TSS), and total dissolved solids (TDS). These parameters may require a combination of salts and non-salt compounds.

8. Constant Monitoring:

• Continuously monitor the parameters as you add chemicals to ensure you are achieving the desired values. Make adjustments as needed.

9. Final Adjustments:

• After achieving the desired parameters, make any final adjustments to ensure stability and uniformity in the synthetic wastewater.

10. Record the Recipe:

• Keep detailed records of the quantities and types of chemicals used to create the synthetic wastewater for future reference.

It's important to note that creating synthetic wastewater with precise parameters can be challenging, and it may require multiple trials and adjustments. Additionally, the exact chemicals and quantities needed will depend on the specific reaction kinetics and equilibrium constants for the chemicals involved. You may need to consult with a chemical engineer or water treatment specialist for more detailed guidance and calculations.

Always handle chemicals with care, follow safety protocols, and dispose of synthetic wastewater appropriately, adhering to local environmental regulations.