The Adsorption of Methylene Blue by Activated Carbon from Spent Coffee Grounds by Microwave-nduced Phosphoric Acid Activation
Abstract
Spent coffee ground (SCG) based activated carbon was prepared by microwaving spent grounds and activated using phosphoric acid. The conditions of the experiment were 5 g of ground, sieved, brewed, and dried beans with 5 mL of phosphoric acid in a 300W microwave for 20 min. The effects of varying molar concentration of phosphoric acid (3.26M, 6.51M, 9.77M, and 13.02M) had on the amount of activated carbon created was determined. To characterize the activated carbon, the point of zero charge (pHpzc) measurement was taken. Various concentrations of methylene blue dye were made at the pHpzc with activated carbon. Using a UV-Vis, the amount of dye that was absorbed by the activated carbon was determined. The SCG activated carbons were then compared to two types of activated carbon on the market.
College
College of Science & Engineering
Department
Chemistry
Campus
Winona
First Advisor/Mentor
Jennifer Zemke
Location
Ballroom - Kryzsko Commons
Start Date
4-18-2024 9:00 AM
End Date
4-18-2024 10:00 AM
Presentation Type
Poster Session
Format of Presentation or Performance
In-Person
Session
1a=9am-10am
Poster Number
15
The Adsorption of Methylene Blue by Activated Carbon from Spent Coffee Grounds by Microwave-nduced Phosphoric Acid Activation
Ballroom - Kryzsko Commons
Spent coffee ground (SCG) based activated carbon was prepared by microwaving spent grounds and activated using phosphoric acid. The conditions of the experiment were 5 g of ground, sieved, brewed, and dried beans with 5 mL of phosphoric acid in a 300W microwave for 20 min. The effects of varying molar concentration of phosphoric acid (3.26M, 6.51M, 9.77M, and 13.02M) had on the amount of activated carbon created was determined. To characterize the activated carbon, the point of zero charge (pHpzc) measurement was taken. Various concentrations of methylene blue dye were made at the pHpzc with activated carbon. Using a UV-Vis, the amount of dye that was absorbed by the activated carbon was determined. The SCG activated carbons were then compared to two types of activated carbon on the market.
