PEMBUATAN ELEKTRODA KARBON BERPORI DARI TEMPURUNG KEMIRI DAN PERANCANGAN PROTOTIPE SISTEM CAPACITIVE DEIONIZATION (CDI) UNTUK DESALINASI AIR PAYAU

A. Astuti, M. Taspika

Abstract


Telah dilakukan pembuatan karbon aktif dengan bahan dasar tempurung kemiri menggunakan H3PO4 2,5% sebagai aktivator dengan suhu aktivasi (400, 500, dan 600) oC.Luas permukaan aktif yang dihasilkan masing-masing adalah (6,6; 95,6; dan 391,6) m2/g. Karbon yang diaktivasi pada suhu 600 oC digunakan sebagai bahan dasar pembuatan elektroda kapasitor untuk system capacitive deionization (CDI) menggunakan polimer polyvinyl alcohol (PVA) sebaga ipengikat. Berdasarkan data voltammogram siklik terhadap elektroda CDI diperoleh besar kapasitansi spesifik elektroda adalah 50,21 mF/g. Proses desalinasi dilakukan pada larutanNaCl 0,24 M dengan menyusun elektroda menggunakan system monopolar dan diberitegangan DC 1,2 V. Penurunan konduktivitas larutan NaCl menggunakan sistem CDI ini sebesar 61,58%, dengan penurunan kadar natrium dalam larutan NaCl yaitu dari 138,0 mg/L menjadi 80,7 mg/L selama 40 menit. Karbon aktif tempurung kemiri ini sangat potensial untuk dikembangkan sebagai elektroda CDI untuk sistem desalinasi air payau.

The writers had done the research of the activated carbon that prepared with the candlenut shell by using H3PO4 2,5% as the activating agent. All samples were heated at the temperatures of (400, 500, and 600) oC. The activated carbon have specific surface area (6.582; 95.623; and 391.567) m2/g respectively. Capacitor electrode for capacitive deionization (CDI) was fabricated by using activated carbon that was heated at activation temperature of 600 oC with polyvinyl alcohol (PVA) as the binder. Based on cyclicvoltammogram of electrode, specific capacitance of CDI electrode is 50.21 mF/g. To observe desalination process of electrode, CDI was made by monopolar system and immersed in NaCl 0.24 M as brackish water sample. Direct current voltage 1.2 V was applied to CDI cell. The decreased of NaCl conductivity with CDI system respectively is 61.58%. Sodium concentration in NaCl decreases from 138.000 mg/L to 80.667 mg/Labout 40 minutes of desalination process.The activated carbon that prepared from candlenut shell is potential to develop as CDI system for desalination of brakish water.


Keywords


activated carbon, desalination, capacitive deionization (CDI)

Full Text:

PDF

References


Fellman, Batya A., (2010), Carbon-Based Electric Double Layer Capacitors for Water Desalination, Tesis, Department of Mechanical Engineering, Massachusetts Institute of Technology.

Himmaty, Ikfina dan Endarko, (2013)), Pembuatan Elektroda dan Perancangan Sistem Capacitive Deionization untuk Mengurangi Kadar Garam pada Larutan Sodium Clorida (NaCl), Berkala Fisika, No. 3, Vol. 16, hal. 67-74.

Humplik, T., Lee, J., Hern, S.C.O., Fellman, B.A., Baig, M.A., Hassan, et.al., (2011), Nanostructured Materials for Water Desalination, Nanotechnology, Vol. 22, IOP science, hal 1-19.

Komarayati, S., Setiawan, D. dan Mahpudin, (2004), Beberapa Sifatdan Pemanfaatan Arang dari Serasah Kayu Pinus, Jurnal Penelitian Hasil Hutan, Vol. 22 No. 1, Bogor, hal. 1722.

Lempang, M., Syafii, W. dan Pari, G., (2009), Sifat dan Mutu Arang Aktif Tempurung Kemiri, Jurnal Penelitian Hasi lHutan, Vol. 30, No. 2, ISSN: 0216-4329 , Balai Penelitian Kehutanan Makasar, hal. 100-113.

Lim, J., Park, N., Park, J., Choi, J., (2009), Fabrication and Characterization of A Porous Carbon Electrode for Desalination of Brackish Water, Desalination, Vol. 238, Elsevier, hal. 37-42.

Park, B., Kim, Y., Park, J., Choi, J., (2011), Capacitive Deionization Using A Carbon Electrode Prepared With Water-Soluble Poly (Vinyl Alcohol) Binder, Journal Of Industrial and Engineering Chemistry, Vol. 17, Elsevier, hal 717-722.

Purwanto, J., (2011), Arang dari Limbah Tempurung Kelapa Sawit (Elaeisguineensis jacq), Jurnal Penelitian Hasil Hutan, vol. 29, No.1, Balai Riset dan Standardisasi Industri, Banjarbaru.

Wang, G., Qian, B., Dong, Q., Yang, J., Zhao, Z., Qiu, J., (2013), Highly Mesoporous Activated Carbon Electrode for Capacitive Deionization, Separation and Purification Technology, Vol. 103, Elsevier, hal 216-221.

Zou, Linda, (2011), Capacitive DeionisationAs A Useful Tool For Inland Brackish Water Desalination, World Congress/Perth Convention and Exhibition Centre (PCEC), Perth.




DOI: https://doi.org/10.15294/jpfi.v11i1.4008

Refbacks

  • There are currently no refbacks.




Creative Commons License
Jurnal Pendidikan Fisika Indonesia is licensed under a Creative Commons Attribution 4.0 International Licensep-ISSN 1693-1246 e-ISSN 2355-3812