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Adsorbent Characterization from Cocoa Shell Pyrolysis (Theobroma cacao L) and Its Application in Mercury Ion Reduction
 
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1
Graduate School of Environmental Management, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
 
2
Environmental Laboratory, Department of Environment, Pidie Regency, 24111 Indonesia
 
3
Doctoral Program, School of Engineering, Post Graduate Program, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
 
4
Department of Agrotechnology, Universitas Iskandar Muda, Banda Aceh, 23234
 
5
Department of Chemical Engineering, Faculty of Engineering, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
 
6
Biochar and Forest Conservation Research Center, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
 
 
Corresponding author
Suhendrayatna Suhendrayatna   

Biochar and Forest Conservation Research Center, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
 
 
J. Ecol. Eng. 2023; 24(6):366-375
 
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ABSTRACT
In this paper, we describe the characterization and application of adsorbent derived from the pyrolysis of cocoa shells, which is a natural source of adsorbent materials. The adsorbent that was used in this experiment is an environmentally friendly adsorbent that was prepared by the pyrolysis of cocoa shells. For 1.5 hours, the pyrolysis process was carried out at temperatures ranging from 300 to 380 oC. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and analysis with an X-ray diffraction (XRD) analyzer. Water-ash content and iodine absorption capacity were also determined in accordance with SNI 06-3730-1995. At a contact time of 90 minutes, the adsorption capacity of mercury ions was found to be 0.106 mg/gram. In this study, the adsorption of mercury ions with the adsorbent followed pseudo-second-order models with an R2 value of 0.9929.
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