HIDROCHAR AMPAS KOPI TERMODIFIKASI H2O2 SEBAGAI ADSORBEN UNTUK ION LOGAM BERAT Cd(II): Hydrochar; spent coffee grounds; H2O2; Cd(II)

Hanika Rizky Ramadani Ramadani

doi:10.26740/icaj.v5i1.20823

HIDROCHAR AMPAS KOPI TERMODIFIKASI H2O2 SEBAGAI ADSORBEN UNTUK ION LOGAM BERAT Cd(II)

Hydrochar; spent coffee grounds; H2O2; Cd(II)

Authors

Hanika Rizky Ramadani Ramadani UIN Walisongo Semarang

DOI:

https://doi.org/10.26740/icaj.v5i1.20823

Abstract

Spent coffee grounds converted to hydrochar can be used as an adsorbent for the removal of metal ion Cd(II) from aqueous solution. Spent coffee grounds hydrochar is produced using the hydrothermal carbonization method at a temperature of 150-350°C. In this study, modifications were made to the hydrochar of spent coffee grounds using a H₂O₂ solution. Modification of hydrochar aims to increase the adsorption capacity of hydrochar on metal ion Cd(II). The modified hydrochar obtained was characterized using FTIR spectrophotometer and SEM-EDX. FTIR spectrum analysis showed the presence of hydroxyl, carboxyl, and amine functional groups on the hydrochar surface which were effective for binding metal ions. SEM-EDX characterization showed that the hydrochar has a rough surface and there are small lumps of various sizes, as well as an increase in the element of oxygen. The results showed that the most optimum adsorption of metal ion Cd(II) occurred at pH 6 and a contact time of 120 minutes. The adsorption kinetics modeling showed good results with a pseudo second order with a regression value of 0,9998.

Keywords: Hydrochar; spent coffee grounds; H₂O₂; Cd(II)

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Published

2023-09-11

Issue

Vol. 5 No. 1 (2022): Indonesian Chemistry and Application Journal

Section

Articles

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