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"Pada penelitian ini zeolite-A digunakan sebagai matriks pembawa aroma yang menahan laju pelepasan minyak atsiri mawar (Rosa damacena Mill.) yang dapat diregenerasi. Zeolite-A disintesis dari kaolin Bangka Belitung menggunakan metode hidrotermal yang terdiri dari proses metakaolinisasi dan zeolitisasi. Zeolite-A dengan 20 wt% bentonite dicampur untuk membentuk matriks ZAB. Bentonite berfungsi sebagai bahan pengikat yang memiliki kemampuan adsorpsi minyak atsiri sebesar 1,497 g/g bentonite. Zeolite-A dan matriks ZAB dikarakterisasi menggunakan X-Ray Difraction, Brunauer–Emmett–Teller, Fourier-transform infrared spectroscopy, Scanning Electron Microscopy- Energy Dispersive X-Ray Spectroscopy. Pengaruh aktivasi kimia zeolite-A terhadap kinerja adsorpsi matriks ZAB diamati dengan penggunaan zat aktivator berbeda, yaitu HCl 0,1 M dan NaOH 0,1 M. Pengamatan siklus regenerasi dilakukan sebanyak 10 kali. Jumlah minyak atsiri teradsorpsi per berat matriks diamati dengan analisis gravimetrik. Tanpa aktivasi kimia, matriks ZAB dengan diameter 0,4; 0,7; 1 cm dapat mengadsorpsi minyak atsiri masing-masing sebesar 1,807; 1,624; 1,411 g/g matriks. Matriks ZAB diameter 0,4 cm teraktivasi HCl 0,1 M dan NaOH 0,1 M berturut-urut mampu mengadsorpsi minyak atsiri mawar sebanyak 1,95 dan 1,807 g/g matriks. Hasil tersebut mengindikasikan aktivasi dengan HCl 0,1 M mampu memperbesar pori sehingga minyak atsiri semakin banyak teradsorbsi. Hingga minggu ke-5 matriks ZAB masih mengandung geraniol, feniletil alkohol, linalool, sitral, sitronellol dan eugenol dengan laju pelepasan masing-masing senyawa adalah 0,04; 0,07; 0,037; 0,021; 0,026; dan 0,011 g/minggu. Hasil ini menunjukkan pelet matriks berbasis zeolite-A mampu menahan pelepasan aroma pada minyak atsiri mawar lebih dari satu bulan

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In this study zeolite-A used as a fragrance carrier matrix which retained the rate of release of rose essential oil (Rose damacena Mill.) which can be regenerated. Zeolite-A was synthesized from Bangka Belitung kaolin using hydrothermal method which consists metakaolinization and zeolitization processes. Zeolite-A and 20 wt% bentonite are mixed to form ZAB matrix. Bentonite functiona as matrix binder which can adsorb rose essential oil 1,497 g/g bentonite. Zeolite-A and ZAB matrix was characterized using X-Ray Difraction, Brunauer–Emmett–Teller, Fourier-transform infrared spectroscopy, Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy. Observation of chemical activation effect on zeolite-A was carried out by using different activator substances, HCl 0.1 M and NaOH 0.1 M. Observation of regeneration cycle was carried out 10 times. The amount of essential oil adsorbed per matrix weight was observed by gravimetric analysis. Without chemical activation, ZAB matrix with a diameter of 0.4; 0.7; 1 cm each has the ability to adsorb essential oils 1.807; 1.624; 1.411 g/g matrix. The 0,4 mm ZAB matrix activated with HCL o.1 M and NaOH 0.1 M each has the ability to adsorb rose essential oil 1,95 and 1,807 g/g matrix, respectively. These results indicate that activation using HCl 0.1 M enlarge pores and allow matrix to adsorb more rose essential oil. Slow release of rose essential oil observed using Gas Matrix pellet still contained geraniol, phenylethyl alcohol, linalool, citral, citronellol and eugenol on the fifth week with release rate of 0.04; 0.07; 0.037; 0.021; 0.026; and 0.011 g/week, respectively. This result shows that zeolite-A-based matrix pellets are able to withstand the release of aroma in rose essential oil up to more than a month."

"ABSTRAKPolusi udara akibat penggunaan pengharum ruangan kimia merupakan salah satu ancaman bagi kesehatan. Dewasa ini, maraknya pemanfaatan minyak atsiri sebagai pengganti pengharum ruangan mendorong produsen untuk menghasilkan matriks yang mampu menahan laju pelepasan aroma. Penelitian ini mengusulkan pembuatan matriksLuffa acutangula dengan modifikasi permukaan sebagai pembawa aroma green tea oil (Camellia sinensis). Luffa yang bersifat biodegradable dan hidrofilik secara alami dimodifikasi dengan zeolit A (ZA), grafit (G) dan graphene oxide (GO) masing-masing menjadi matriks LZA, LG dan LGO melalui coating dengan metode dip and dry. ZA disintesis dengan metode hidrotermal. Grafit diberi perlakuan asam-basa. GO disintesis dengan metode Hummers. Sodium alginat digunakan sebagai bahan pengikat matriks. Hasil karakterisasi BET menunjukkan luas permukaan LZA, LG dan LGO masingmasing sebesar 323,601; 151,429 dan 538,021 m2/g. Hasil karakterisasi FTIR membuktikan interaksi matriks LZA, LG, dan LGO dengan green tea oil (GTO). Efisiensi adsorpsi matriks dianalisis dengan variasi massa porous material (ZA, G, dan GO). Perbandingan massa L:SA:PM sebesar 4:1:3, efisiensi adsorpsi yang terjadi adalah LZA3 6,067 g GTO/g LZA3, LG3 6,771 g GTO/g LG3 dan LGO3 10,916 g GTO/g LGO3. Karakteristik adsorpsi isoterm matriks LGO dianalisa menggunakan model Langmuir, Freundlich dan Temkin. Adsorpsi isoterm matriks LGO oleh matriks LGO terdeskripsikan paling baik oleh model adsorpsi isotherm Langmuir. Kinetika adsorpsi GTO oleh matriks LGO terdeskripsikan paling baik oleh model pseudo-second order. Analisa extended release menunjukkann LGO mampu pelepasan GTO ke udara hingga lebih dari 6 minggu dengan laju pelepasan rata-rata 5,07 g/minggu.

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ABSTRACTPollution due to chemical air freshener is one of the massive threats to the health. Nowadays, the growing public interest of essential oils utilization as air freshener alternative pushes fragrance indistry to produce matrix that can create long lasting product by controlling the release rate. In this work, the fabrication of surface modified luffa acutangula as green tea oil (Camellia sinensis) matrix carrier is proposed. Luffa sponge which is biodegradable and hydrophilic in nature, is made hydrophobic by coating with zeolite A (ZA), graphite (G) and graphene oxide (GO) each become LZA, LG and LGO matrix using dip and dry method. Initially, ZA was synthesized using hydrothermal method. Graphite was treated with acid-base treatment. GO was stnthesized using Hummers' method. Sodium alginate was used as matrix binder agent. The results obtained by BET indicate surface area of LZA, LG and LGO are 323.601; 151.429 and 538.021 m2/g, respectively. FTIR characterization indicate interaction between LZA, LG, and LGO matrix with green tea oil (GTO). Adsorption efficiency of the matrix was studied with mass variation of the porous material (ZA, G, dan GO). Mass ratio L:SA:PM of 4:1:3, resulted as the highest efficiency with LZA3 6.067 g GTO/g LZA3, LG3 6.771 g GTO/g LG3 and LGO3 10.916 g GTO/g LGO3. Adsorption isotherm model of Langmuir, Freundlich and Temkin of LGO was studied. The adsorption process of LGO matrix was well fitted to Langmuir equilibrium. The adsorption kinetic of LGO matrix was well fitted to Pseudo-seond order. The extended release study showed that LGO matrix was able to hold GTO release up to more that 8 weeks with the average release rate of 5.07 g/week."