Teknik Kimia
http://hdl.handle.net/11617/8376
2024-03-29T11:05:13ZPhotocatalytic Decolouration of Reactive Orange 16 (R3R) Dye
http://hdl.handle.net/11617/11922
Photocatalytic Decolouration of Reactive Orange 16 (R3R) Dye
Purnama, Herry
Photocatalytic decolouration of dyes is a new concern among researchers since it offers an attractive method for decolouration of dyes and breaks them into simple mineral forms. Commonly the method utilises a TiO2 semiconductor and UV light. Later on to increase efficiency, the method was developed using applied potential as known photoelectrocatalysis. Experiments were carried out in a larger-scale photoelectrocatalytic reactor equipped with TiO2 photo-anode and Ni counter electrode to degrade an azo Reactive Orange 16 (RO 16) dye. Effect of applied potential, UV irradiation, anion of electrolytes (Na2SO4 and NaCl) and pH has been investigated. It was found that decolouration going to faster in the present of ion chloride. To compare photoelectrocatalytic and photocatalytic method, it has been tried to use a non-woven paper (supplied by Ahlstrom) and the TiO2 (Millenium PC500) in slurry by removing the electrodes. The rate of decolouration by photoelectrocatalytic method was very similar to that which by non-woven paper and TiO2 in slurry.
2005-10-01T00:00:00ZAdsorpsi Limbah Tekstil Sintetis dengan Jerami Padi
http://hdl.handle.net/11617/11921
Adsorpsi Limbah Tekstil Sintetis dengan Jerami Padi
Purnama, Herry; Setiati, S
Selama ini jerami padi belum dimanfaatkan secara optimal, padahal jerami padi mempunyai banyak kegunaan. Salah satwrya adalah sebagai penjerap (adsorbent) zat warna pada limbah tekstil, karena struktur dari jerami padi yang berupa rongga (molecular sieves). Zat warna tekstil mengandung logam-logam berat yang sangat berbahaya yang merupakan komponen utama dalam limbah tekstil sehingga dalam pengolahannya perlu dikurangi atau bahkan dihilangkan. Pada penelitian ini, proses adsorpsi zat warna pada limbah tekstil dengan jerami padi dilakukan dengan cara spektrofotometri. Jerami padi dibagi menjadi dua, yaitu jerami padi dengan pengolahan dan jerami tanpa pengolahan. Pengolahan jerami padi dengan cara memanaskannya dalam larutan. NaOH 2% selama 30 menit, lalu disaring dan dibilas sampai warna coklat menghilang. Selanjutnya dilakukan perendaman adsorbent dalam fimbah tekstil. Dari hasil penelitian dipcroleh kondisi yang relatif baik yaitu pada ukurcm adsorbent 140 mesh, dan waktu perendaman 48 jam dihasilkan zat warna terjerap 2,94 mg untuk jerami tanpa pengolahan, 4,33 mg untuk jerami dengan pengolahan dan 4, 88 mg untuk karbon aktif.
2004-04-01T00:00:00ZMengenal Lebih Dekat Sistem Penyelenggaraan Pendidikan di UMS
http://hdl.handle.net/11617/9481
Mengenal Lebih Dekat Sistem Penyelenggaraan Pendidikan di UMS
Mujiburohman, Muhammad
2015-02-01T00:00:00ZEffects of Time and Temperature of Poly Ether Ether Ketonesulfonation (sPEEK) on The Solubility of sPEEK in Dimethylacetamide
http://hdl.handle.net/11617/9458
Effects of Time and Temperature of Poly Ether Ether Ketonesulfonation (sPEEK) on The Solubility of sPEEK in Dimethylacetamide
Mujiburohman, Muhammad; Hidayati, Nur; Purnama, Herry; Nihayati, Siti R.; Kurniawan, Vendi; Hakim, Muhammad F.
This work aims at investigating the effects of
time and temperature of PEEK sulfonation on the
solubility of sulfonated PEEK (sPEEK) in the
solvent of dimethylacetamide (DMAc), as a part of
manufacturing Proton Exchange Membrane Fuel
Cell. Using direct method, PEEK was sulfonated in
high concentrations of sulfuric acid at temperature
variations of 30, 50, and 70°C, for the period of
times of 60, 90, and 120 minutes. Higher
temperature and longer time of sulfonation resulted
in finer size of sPEEK deposites. As predicted, the
solubility tests showed that the finer sPEEK was
dissolved better in DMAc.
2013-01-01T00:00:00Z