Activation and characterization of waste coffee grounds as bio-sorbent

3rd International Conference on Chemical Engineering Sciences and Applications 2017

Mariana^1,2 ; Marwan, M.^1 ; Mulana, F.^1 ; Yunardi, Y.^1 ; Ismail, T.A.^3 ; Hafdiansyah, M.F.^3

Department of Chemical Engineering, Syiah Kuala University, Banda Aceh

23111, Indonesia^1

Environmental and Natural Resource Research Center, Syiah Kuala University, Banda Aceh

23111, Indonesia^2

Undergraduate Program of Chemical Engineering, Syiah Kuala University, Banda Aceh

23111, Indonesia^3

关键词: Banda Aceh , Indonesia;    Carbonization process;    Environmental problems;    Fourier transform infra reds;    Material characteristics;    Morphological properties;    Quality requirements;    Spent coffee grounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/334/1/012029/pdf
DOI  :  10.1088/1757-899X/334/1/012029

来源: IOP

【 摘 要 】

As the city well known for its culture of coffee drinkers, modern and traditional coffee shops are found everywhere in Banda Aceh, Indonesia. High number of coffee shops in the city generates large quantities of spent coffee grounds as waste without any effort to convert them as other valuable products. In an attempt to reduce environmental problems caused by used coffee grounds, this research was conducted to utilize waste coffee grounds as an activated carbon bio-sorbent. The specific purpose of this research is to improve the performance of coffee grounds bio-sorbent through chemical and physical activation, and to characterize the produced bio-sorbent. Following physical activation by carbonization, a chemical activation was achieved by soaking the carbonized waste coffee grounds in HCl solvent and carbonization process. The activated bio-sorbent was characterized for its morphological properties using Scanning Electron Microscopy (SEM), its functional groups by Fourier Transform Infra-Red Spectrophotometer (FTIR), and its material characteristics using X-Ray Diffraction (XRD). Characterization of the activated carbon prepared from waste coffee grounds shows that it meets standard quality requirement in accordance with Indonesian National Standard, SNI 06-3730-1995. Activation process has modified the functional groups of the waste coffee grounds. Comparing to natural waste coffee grounds, the resulted bio-sorbent demonstrated a more porous surface morphology following activation process. Consequently, such bio-sorbent is a potential source to be used as an adsorbent for various applications.