Adsorption Test Protocols Quiz

What is the first step in the preparation of NBC from spent coffee grounds?

• Mixing with MgCl2 solution

• Pyrolysis at 200°C

• Ball milling

• Crushing and sieving

Which parameter is not part of the physicochemical characterizations of NBC production?

• Specific gravity

• Moisture content

• Conductivity

• Surface area

What is the purpose of modifying NBC with MgCl2?

• Increase specific gravity

• Change color

• Enhance adsorption capacity

• Reduce moisture content

In the preliminary test, what parameter is varied while fixing all other parameters?

• Dose of adsorbent

• Shaking speed

• Equilibration time

• Initial concentration of phosphate

What is the purpose of running different pH levels in the preliminary test?

• To analyze the color change

• To test different types of adsorbents

• To determine the effect of pH on adsorption

• To compare NBC with BC

What is the focus of the adsorption isotherm study?

• Comparing different adsorbents

• Fitting data into Langmuir and Fred models

• Analyzing residual concentration

• Optimizing shaking speed

What is the purpose of the kinetics study in WP3?

• To compare different adsorption isotherms

• To analyze the residual phosphate over time

• To determine the effect of pH

• To measure specific gravity

What is the final step in the optimization of operational parameters?

What is the equilibration time in the optimization of operational parameters?

• 60 min

• 10 min

• 120 min

• 30 min

What is the shaking speed in the kinetics study?

• 250 rpm

• 200 rpm

• 150 rpm

• 100 rpm