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All Journal Indonesian Journal of Chemistry Indonesian Journal of Pure and Applied Chemistry AR-RAZI Jurnal Ilmiah

Lia Destiarti

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Tanjungpura, Jl. Prof. Dr. Hadari Nawawi, Pontianak 78114, West Kalimantan, Indonesia

Author-ID : 5857371

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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Articles

Adsorpsi Senyawa Organik pada Lindi TPA Batu Layang menggunakan Zeolit Alam Teraktivasi Sasa Widianti; Lia Destiarti; Nelly Wahyuni
Jurnal Ilmiah Ar-Razi Vol 10, No 1 (2022): JURNAL ILMIAH AR-RAZI
Publisher : Universitas Muhammadiyah Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/ar-r.v10i1.3116

Tingginya senyawa organik yang terkandung di dalam lindi memberikan dampak buruk pada lingkungan. Zeolit alam merupakan salah satu material yang sering digunakan dalam pengolahan limbah cair karena memiliki kemampuan dalam mengadsorpsi, untuk meningkatkan kualitas zeolit alam perlu dilakukan proses aktivasi yang bertujuan memperbesar volume pori-pori dari zeolit alam. Penelitian ini bertujuan untuk mengetahui kapasitas zeolit alam teraktivasi asam klorida (HCl) dan natrium bikarbonat (NaHCO3) sebagai adsorben senyawa organik yang dianalisis sebagai nilai Chemical Organic Demand (COD) pada lindi dengan metode kolom batch menggunakan aliran down flow. Aktivasi zeolit menggunakan aktivator asam dan basa dikarakterisasi fisika-kimia, luas permukaan dengan uji daya serap iod dan metilen biru, serta gugus fungsi dengan Fourier Transform Infra Red (FTIR). Nilai COD diukur dan dihitung dengan metode titrasi permanganometri. Hasil karakterisasi uji iod pada zeolit alam, zeolit aktivasi asam dan zeolit aktivasi basa berturut-turut sebesar 232,57 mg/g, 257,32 mg/g, dan 240,79 mg/g. Hasil karakterisasi luas permukaan dengan metilen biru pada zeolit alam, zeolit aktivasi asam dan zeolit aktivasi basa berturut-turut sebesar 2,02 m2/g, 2,45 m2/g dan 2,48 m2/g. Zeolit alam teraktivasi HCl dan NaHCO3 mampu menyerap senyawa organik pada lindi berturut-turut sebesar 69,32% dan 89,39%. Nilai COD pada lindi setelah pengolahan dengan zeolit teraktivasi telah memenuhi baku mutu yang telah ditentukan olehn Peraturan Menteri Lingkungan Hidup sebesar 300 mg/L dengan konsentrasi awal lindi 840 mg/L menjadi 257 mg/L teraktivasi asam dan 89 mg/L teraktivasi basa.

Application of Titanium-Silica-Graphite Composite Material for Photocatalytic Process of Methylene Blue Lia Destiarti; Risya Sasri
Indonesian Journal of Chemistry Vol 20, No 6 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.48998

The use of TiO2 in the slurry system for the photocatalytic process has disadvantages. It causes the resistance of UV transmission because it is cloudy and the difficulty for obtaining the catalyst at the end of the process. Therefore, an attempt to overcome this was conducted by compositing TiO2 on SiO2. Furthermore, carbon material can be used as a support material for TiO2-SiO2, so that the mixed materials can be used as a photocatalyst. The methods for synthesis the material was a sol-gel method by varying the composition of TiO2-SiO2/graphite, which was 1:1; 1:2; and 2:1. The material obtained was characterized by FTIR, DRUV, XRD, and SEM. Photocatalytic activity of the synthesized material was tested in methylene blue solution whereas the quantitative data derived from UV-Vis spectrometry measurement. Photocatalyst activity was carried out by varying the degradation time of 30–180 min. The FTIR spectrum showed that O-H (~3400 cm–1) and C-O (~1100 cm–1) are the major groups in the synthesized materials. The value of bandgap energy (Eg) were 4.15, 4.20, 5.22, and 5.19 eV for TiO2-SiO2, TiO2-SiO2/G (1:1; 1:2; and 2:1) composites, respectively. The XRD pattern of TiO2-SiO2 showed that the highest peaks of 2q were observed at 25.32, 37.71 and 47.91°. Graphite identity appeared at 2q = 59.87°. Micrograph of SEM showed a homogenous dispersion of spherical particles in the materials. Photocatalytic test results showed that TiO2-SiO2/G with a composition of 2:1 has the highest percentage of methylene blue degradation, which reached 94% at 180 min.

ANALISIS UKURAN PARTIKEL SILIKA HASIL EKSTRAKSI DARI BATU PADAS ASAL KABUPATEN KETAPANG KALIMANTAN BARAT Risya Sasri; Nurlina Nurlina; Lia Destiarti; Intan Syahbanu
Indonesian Journal of Pure and Applied Chemistry Vol 1, No 1 (2018)
Publisher : Tanjungpura University

Analysis of particle size of silica was extracted from rocks from Ketapang Regency, West Kalimantan based on characterization using scanning electron microscope (SEM) have been carried out. The analysis was performed to determine the particle size change in extraction silica without and with activation using acid solution. SEM image processing was performed on a 10 μm scale at 350x magnification through the image-J software to determine the particle size distribution. The results of the analysis showed that the area and diameter of the silica particle extracted from rocks were 3,935 μm2 and 3,147 μm (without activation) and 4,28 μm2 and 3,267 μm (activated) respectively.

PENENTUAN KADAR MANGAN (Mn) PADA AIR GAMBUT SECARA SPEKTROFOTOMETRI UV-Vis DENGAN PERBANDINGAN METODE KURVA KALIBRASI DAN ADISI STANDAR (DETERMINATION OF MANGANESE IN PEAT WATER USING UV-Vis SPECTROPHOTOMETER: COMPARATION OF CALIBRATION OF CURVE AND STANDARD ADDITION METHOD) Emilia Emilia; Lia Destiarti; Adhitiyawarman Adhitiyawarman
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 1 (2021)
Publisher : Tanjungpura University

Peat water has different characteristics from one location to another. The characteristics referred to include levels of organic matter, pH, conductivity, and turbidity. Based on these differences, it is necessary to research to determine the analytic parameters and the effect of matrix differences on manganese levels using a separate calibration method and standard addition using a Uv-vis spectrophotometer. The determination of manganese was carried out by the persulfate method, that is the oxidation of Mn in water by persulfate in an acidic and hot atmosphere to form MnO4 which is purple-red. The obtained results from the determination of the analytical parameters of the separate calibration method are precision of 7.75% to 63.96%, an accuracy of 0.80% to 5.24%, the linearity of r = 0.997, a detection limit of 0.170 ppm, and a limit of quantification of 0.567 ppm. Meanwhile, the addition method produces a precision of 2.19% to 20.35%, accuracy and linearity at points I, II, III are 10.65% to 25.47% respectively; 20.9% to 26.8%; 2.76% to 27.24% and 0.995; 0.999; 0.995. Linearity in addition as well as in calibration curves at all points have met the minimum value of SNI 6989.5: 2009 (R ≥ 0.995). In addition, based on the results of the comparison of the levels of the separate calibration and standard additions, the values are different, but the results of the t-test result in t-count <t-table. This means that there is no significant difference between separate calibration methods and standard addition.

PENGARUH JENIS MINYAK TERHADAP SIFAT FISIK D AN KIMIA BATH BOMB (THE EFFECT OF THE TYPE OIL ON THE PHYSICAL AND CHEMICAL PROPERTIES OF BATH BOMB) Annisa Bella Maharani; Lia Destiarti; Nurlina Nurlina; Intan Syahbanu; Winda Rahmalia
Indonesian Journal of Pure and Applied Chemistry Vol 3, No 1 (2020)
Publisher : Tanjungpura University

Bath bombs were produced with ten different types of oil to determine the effect of the oil used on their physical and chemical properties. Bath bombs were prepared by mixing the dry ingredients first (citron, cornstarch, baking soda) and stirring until all the ingredients were well blended. Then, mixed the wet ingredients (water, oil, perfume ore, food coloring) into the beaker. After that, the wet ingredients were poured gradually into the dry dough, and this step was done until all the wet ingredients run out, and the texture of the bath bomb dough was slightly moist so that it can be put in the mold. Finally, the bath bomb is printed and tested in a laboratory. The result showed that the difference in essential oils used in the manufacture of bath bombs does not affect the pH of the bath bomb but affects the stability of the resulting foam. The acceptability test results showed that the resulting bath bomb provided a sensation of freshness and relaxation and did not cause allergies. Based on the SWOT analysis results, these bath bombs can advance and develop by implementing a vertical integration strategy

Synthesis of Reduced Graphene Oxide-Bentonite Composite and Its Application as a Lead(II) Ion Adsorbent Bartholomeus Lavelim; Lia Destiarti; Adhitiyawarman Adhitiyawarman; Risya Sasri
Indonesian Journal of Chemistry Vol 23, No 1 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.67993

The use of reduced graphene oxide (rGO) as an adsorbent has challenges to overcome. Although rGO has a large surface area, its solubility in water is very low. In this study, bentonite is added to reduce the use of rGO mass and increase the dispersibility of the adsorbent. The rGO-bentonite (rGOB) was characterized by XRD, FTIR, SEM-EDX, and XRF. The adsorption activity was tested in a Pb ion solution, derived from AAS. The XRD pattern of GO, rGO, and rGOB of 2q were observed at 10.90°, 24.88°, and 26.66°, respectively. The FTIR spectrum showed that GO has C=C, C-O, C=O, and O-H, while in rGO, C=O disappears, and there was a significant decrease in the O-H and C-O peaks. The rGOB has identical spectra with rGO and yet has an additional peak from bentonite O-Si-O. The GO and rGO form agglomerate while rGOB looks more dispersed. The C/O ratio increases from GO to rGO because of the reduction process. The bentonite is Ca-bentonite with main components Al2O3, SiO2, and CaO. The results showed that the rGOB composite could reduce the use of rGO by up to 80% and have an adsorption performance similar to rGO with an adsorption capacity of 217 mg/g.

Co-Authors Adhitiyawarman, Adhitiyawarman Annisa Bella Maharani Bartholomeus Lavelim Emilia Emilia Intan Syahbanu Nelly Wahyuni Nurlina, Nurlina Risya Sasri Sasa Widianti Winda Rahmalia

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