PENERAPAN SONIKASI PADA ADSORPSI CONGO RED OLEH HIDROCHAR AMPAS TEBU TERMODIFIKASI KOBALT HIDROKSIDA

ANANDIKA, ADITYA and Yuliasari, Nova and Hidayati, Nurlisa (2025) PENERAPAN SONIKASI PADA ADSORPSI CONGO RED OLEH HIDROCHAR AMPAS TEBU TERMODIFIKASI KOBALT HIDROKSIDA. Undergraduate thesis, Sriwijaya University.

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Abstract

The textile industry in Indonesia generates a large amount of dye waste, including Congo red, which is carcinogenic and difficult to degrade naturally. Therefore, an effective treatment method such as adsorption is necessary. This study utilizes an adsorbent made from hydrochar derived from sugarcane bagasse, processed using the hydrothermal carbonization (HTC) method, making it more environmentally friendly and cost-effective. Adsorption effectiveness is enhanced through sonication, activation with 10% H3PO4, and modification with Co(OH)2. XRD and FTIR analyses confirm the successful synthesis of hydrochar-Co(OH)2, with a surface area of 2.064 m²/g. The hydrochar-Co(OH)₂ has a pHpzc value of 7.59. Adsorption occurs optimally at a concentration of 20 mg/L, achieving a maximum adsorption capacity of 14.662 mg/g and an optimum contact time of 12 minutes. The adsorption effectiveness of hydrochar-Co(OH)2 reaches 49.09%, which is higher than that of unmodified hydrochar at 45.48%. The adsorption effectiveness using the sonication method reaches 49.09%, surpassing the shaker method at 43.64%. The pseudo-first-order kinetic model yielded a calculated qe value of 2.765, while the pseudo-second-order model produced a qe value of 4.299, compared to the experimental qe value of 4.179. The pseudo-second-order model provided a calculated qe value closer to the experimental qe, indicating that the adsorption mechanism occurs chemically. This conclusion is further supported by the Langmuir isotherm model regression value of 0.981, which is closer to one, and the Freundlich intensity value being less than 1.

Item Type:	Thesis (Undergraduate)
Subjects:	Q Science > QD Chemistry > QD71-142 Analytical chemistry
Divisions:	08-Faculty of Mathematics and Natural Science > 47201-Chemistry (S1)
Depositing User:	Aditya Anandika
Date Deposited:	16 Mar 2025 06:06
Last Modified:	16 Mar 2025 06:06
URI:	http://repository.unsri.ac.id/id/eprint/168974

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