Systematic Mapping on Adsorption Studies Using Spent Coffee Grounds

• Main Authors: Mangussad, Therese Jan E., Nuñez, Frence Laurice Ghayle A., Topacio, Jean E.
• Format: text
• Published: Animo Repository 2021
• Subjects: spent coffee grounds; adsorption; systematic mapping; valorization
• Online Access: https://animorepository.dlsu.edu.ph/conf_shsrescon/2021/paper_see/7; https://animorepository.dlsu.edu.ph/context/conf_shsrescon/article/1681/viewcontent/SEE__Systematic_Mapping_on_Adsorption_Studies_Using_Spent_Coffee.pdf
• Institution: De La Salle University

The increase in demand of coffee in the Philippines, led to the increase of production of spent coffee grounds (SCG) waste; utilization of this material is crucial as SCG pose environmental hazards. To evaluate the adsorbent capability of SCG, this study utilized systematic mapping. Research questions that were defined are as follows: 1) What is the research trend on adsorption studies using SCG? 2) What are the processes utilized to produce adsorbent from SCG? 3) What are the different contaminants adsorbed using SCG? 4) What are the important characterizations and performance of SCG adsorbents? It was determined that SCG undergoes various processes such as drying, carbonization, and physical and chemical activation to convert its structure to porous material with a high surface area of up to 2785 m2/g. Furthermore, it was used to adsorb various contaminants such as heavy metals, dyes, and pharmaceuticals with adsorption capacity and removal efficiency of up to 1222.5 mg/g and 100%, respectively. It was also determined that various factors affect adsorption capacity and removal efficiency, namely pH level, adsorbent dosage, initial concentration, and contact time depending on the contaminant. With these, the potentials of SCG as raw material for adsorbent production were found beneficial to reduce its disposal to landfills.