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"The integration of adsorption and photocatalysis process is considered to have a better prospect inhandling of organic wastes. The combination of catalyst consisting of Ti0; photocatalyst and activecarbon (AC) adsorbent has been evaluated to treat a phenol waste. Preparation of catalyst wasconducted by evaporating all dilution of TiO; slurry, which has been mired with the granular of activecarbon at a temperature of l00"C and calcined at a temperature of 400"C. SiO; which obtained fromTEOS solutions was added to prevent a falling off TiO;]rom AC support Characterization of BET wasconducted to find out the surf/'ace area as well as pore size of the catalyst. Activity test of the catalystmaterial was done by conducting of 30 ppm phenol solution in annular Pyrex glass reactor thatsurrounded by 3 U V lamps, which have the total illumination intensity of I 44 ,UW/ml. The phenol solutionwas continuously poured in the reactor with rate of 35 ml/min for about 8 hours. The phenolconcentration was analyzed with spectrophotometer at wavelength of500 nm. The optimum condition ofthis domination was reached by using a catalyst of Ti0/SiO;/AC with composition of 2.4:0.047:97.5(weight ratio), and succeeded in eliminating of 30 ppm phenol with 100 % conversion."

"ABSTRAKKomposit termodifikasi fotokatalis Ag/TiO2 dikombinasikan dengan karbon aktif yang berasal dari tandan kosong kelapa sawit untuk mengelimasi 2,4,6-triklorofenol dan logam merkuri secara simultan. Komposit fotokatalis Ag/TiO2 dilkaukan dengan metode PAD photo assited deposition . Karbon aktif diaktivasi secara kimia dengan ZnCl2 sebagai adsorben untuk meningkatkan daya adsorpsi fotokatalis terhadap senyawa organik yang didegradasi. Penambahan Ag sebagai dopan logam bertujuan agar dapat mereduksi logam merkuri dan menjaga TiO2 dari kejenuhan. Komposit ini dikarakterisasi dengan menggunakan XRD, SEM-EDX, BET, dan FTIR. Hasil Karakterisasi XRD menunjukkan bahwa komposit Ag/TiO2-karbon aktif memiliki fasa anatase TiO2. Hasil katakterisasi SEM dan EDX menunjukkan adanya material karbon aktif, TiO2 dan Ag dalam morfologi dan komposisi komposit. Selain itu, hasil karakterisasi BET menunjukkan bahwa komposit mempunyai luas permukaan sebesar 81.98 m2/g. Komposisi perbandingan massa komposit yang optimum berdasarkan uji kinerja pada limbah tunggal dan simultan adalah 0,03 : 1: 0,02 Ag : TiO2 : Karbon Aktif . Hasil uji kineja komposit dengan komposisi optimal dan kondisi pH =10 menghasilkan konversi degradasi 2,4,6-triklorofenol dan reduksi merkuri sekitar 36 dan 83 dalam limbah tunggal sedangkan konversi dalam limbah simultan sekitar 57 dan 77 dengan masing-masing konsentrasi awal 10 ppm dalam waktu 4 jam.

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ABSTRAKComposite Ag TiO2 which combined by activated carbon was prepared from empty buch palm oil to eliminate 2,4,6 trichlorophenol and mercury simultaneously. Ag TiO2 that has been synthesized by the method PAD photo assited deposition . Activated Carbon has been activaed chemically by ZnCl2 and used as an adsorbent to improve a photocatalyst adsorption of the organic compounds that will didegraded. The addition of silver Ag as metal dopant to provide reduction machanism for heavy metal, mercury and also to protect TiO2 from saturation. Composite samples were characterized by using XRD, SEM EDX, BET, and FTIR. XRD characterization has anatase TiO2. Result characterization SEM EDX indicate the presence of activated carbon material. In addition, BET characterization results indicate that the composite has surface area of 81.98 m2 g. The test result shows that degradation 2,4,6 trichlorophenols and redution of mercury simultaneously with optimal composition Ag TiO2 activated carbon of mass ratio 0,03 1 0,02, while the operating pH condition in pH 10 with conversion of 2,4,6 trchlorophenol degradation and mercury reduction about 36 and 83 in single condition while 57 and 77 in simultaneously with irradiation time for 4 hours"