PEMBUATAN ADSORBEN AMPAS TEH TERMODIFIKASI MATERIAL MAGNETIT (Fe3O4) UNTUK PENGOLAHAN LIMBAH METILEN BIRU

MIFTAH AULIA, . (2024) PEMBUATAN ADSORBEN AMPAS TEH TERMODIFIKASI MATERIAL MAGNETIT (Fe3O4) UNTUK PENGOLAHAN LIMBAH METILEN BIRU. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Metilen biru merupakan limbah berbahaya yang dihasilkan oleh industri dan laboratorium, salah satunya dihasilkan oleh laboratorium kimia UNJ. Oleh karena itu perlu dilakukan pengolahan. Salah satu teknik pengolahan limbah adalah adsorpsi. Adsorpsi dapat dilakukan menggunakan adsorben biomassa salah satunya ampas teh, karena ampas teh memiliki kandungan gugus potensial seperti gugus hidroksil. Tujuan dari penelitian ini untuk mengetahui kondisi optimum adsorben sehingga menghasilkan nilai %removal yang baik. Metode adsorpsi dilakukan dengan menggunakan adsorben ampas teh yang diaktivasi dengan HCl dan dimodifikasi dengan magnetit (Fe3O4). Magnetit disintesis dengan metode kopresipitasi dan kemudian dicampurkan dengan ampas teh, melakukan optimasi pH dan waktu kontak, mengaplikasikan adsorben langsung pada limbah, uji isoterm adsorpsi untuk mengetahui model isoterm yang cocok, dan karakterisasi adsorben menggunakan FTIR dan SEM. Hasil penelitian menunjukan pH optimum pada pH 10 dengan daya adsorpsi sebesar 98,4% dan waktu kontak selama 90 menit dengan daya adsorpsi sebesar 98,6%, saat adsorben diaplikasikan langsung pada limbah metilen biru menghasilkan daya adsorpsi sebesar 99%, dan model isoterm adsorpsi yang cocok menggunakan isoterm Freundlich dengan nilai R2 sebesar 0,9704. Berdasarkan hasil %removal diketahui bahwa adsorben ampas teh termodifikasi Fe3O4 dapat efektif menyerap limbah metilen biru. (*****) Methylene blue is a hazardous waste produced by industry and laboratories, one of which is produced by the UNJ chemical laboratory. Therefore, it needs to be processed. One of the waste treatment techniques is adsorption. Adsorption can be done using biomass adsorbents, one of which is tea waste, because tea waste contain potential groups such as hydroxyl groups. The purpose of this study is to determine the optimal condition of adsorbents to produce a good %removal value. The adsorption method was carried out using tea grounds adsorbents activated with HCl and modified with magnetite (Fe3O4). Magnetite is synthesized by the coprecipitation method and then mixed with tea grounds, performs pH and contact time optimization, applies adsorbents directly to waste, adsorption isothermic tests to determine suitable isothermal models, and adsorbent characterization using FTIR and SEM. The results showed that the optimum pH at pH 10 with an adsorption power of 98.4% and a contact time of 90 minutes with an adsorption power of 98.6%, when the adsorbent was applied directly to the methylene blue waste produced an adsorption power of 99%, and an adsorption isoterm model that was suitable using Freundlich isoterm with an R2 value of 0.9704. Based on the results of %removal, it is known that Fe3O4 modified tea waste adsorbent can effectively adsorp methylene blue waste.

Item Type: Thesis (Sarjana)
Additional Information: 1). Dra. Tritiyatma Hadinugrahaningsih, M.Si. 2). Yussi Pratiwi, S.Pd., M.Sc.
Subjects: Sains > Sains, Ilmu Pengetahuan Alam
Sains > Kimia
Divisions: FMIPA > S1 Kimia
Depositing User: Users 24275 not found.
Date Deposited: 07 Aug 2024 04:01
Last Modified: 07 Aug 2024 04:01
URI: http://repository.unj.ac.id/id/eprint/48896

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