Articles

STUDI PENDAHULUAN PEMANFAATAN LIMBAH DESALINASI UNTUK PEMBUATAN Mg/Al HYDROTALCITE-LIKE SEBAGAI ADSORBEN METHYL ORANGE Heraldy, Eddy; Prasasti, Dian; Wijaya, Karna; Santosa, Sri Juari; Triyono, Triyono
Bumi Lestari Journal of Environment Vol 12, No 1
Publisher : Udayana University

Show Abstract | Original Source | Check in Google Scholar

Abstract

The utilization of industrial wastewater into a versatile material that has been the focus of research for economics reasons, environmental and technical. One of the proposed industrial wastewater for a new useful material is wastewater from the desalination process which is also known as brine water. The magnesium content in brine water is able to used as a source of magnesium for the synthesis of Mg/Al hydrotalcite-like compound (Mg/Al HTlc). Mg/Al HTlc are widely investigated for their potential applications in research and industrial processes as adsorbents, catalysts and /or catalyst precursors and pharmaceutical industry excipients. As adsorbents, Mg/Al HTlc are receiving greater interests in the environmental community due to their high adsorption capacity. However, before using natural brine water, has conducted a preliminary study the synthesis of Mg/Al HTlc by using artificial brine water as a model of desalination wastewater. The objective of this research is to synthesis of Mg/Al HTlc from artificial brine water and its ability tested as a methyl orange (MO) adsorbents. The research initiated with the synthesis of Mg/Al HTlc from artificial brine water. Characterization of the Mg/Al HTlc synthesized was confirmed through X-ray Diffraction and FT-IR Spectroscopy. The determination of optimum acidity, adsorption rate, and energy and capacity adsorption were studied. The result showed that pH 3 was the optimum acidity for the adsorption of MO on Mg/Al HTlc. MO was adsorbed at first order adsorption rate of 7.30 × 10-4 s-1 on the Mg/Al HTlc, the adsorption capacity and adsorption energy were 4.36 × 10-5 mol g-1 and 27.54 kJ mol-1, respectively. From the preparatory process and the synthesis of Mg/Al HTlc by using artificial brine water to provide the information that the byproduct of desalination processes (brine water) which are believed to be used for the synthesis of Mg / Al HTlc.
Chitosan succinate/PVA-PEG Membrane: Preparation, Characterization and Permeation Ability Test on Creatinine Lusiana, Retno Ariadi; Sangkota, Vivi Dia Ahmad; Santosa, Sri Juari
Jurnal Kimia Sains dan Aplikasi Vol 21, No 2 (2018): Volume 21 Issue 2 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Original Source | Check in Google Scholar

Abstract

Evaluation character of chitosan membrane-succinate / poly vinyl alcohol-poly ethylene glycol (PVA-PEG) were prepared in acetic acid solvent through a phase inversion method has been performed. The study began with the preparation of crosslinked chitosan compounds with succinic acid, followed by preparation into membrane by combining PVA-PEG. Character analysis of the resulting material using FTIR, EDX, TGA, water absorption test, tensile strength, membrane hydrophilicity. The ability of membrane permeation was tested against creatinine. The results showed that the succinate had reacted with chitosan. Chitosan modification through cross link and polymer alloys increases tensile strength and membrane strain of 1.7-2.5 x of pure chitosan membrane. In addition, the modified membrane also has higher water absorption and hydrophilicity values than the unmodified membrane, and this implies the ability of membrane-induced creatinine permeation. Permeable permeation values were 13.8% in chitosan, 24.84% on chitosan-succinate and 25% in chitosan-succinate / PVA-PEG. Chitosan-succinate membranes have the ability to use more than 4x repeated use.
PENGARUH SUBFRAKSINASI DAN pH TERHADAP SENSITISASI ASAM HUMAT PADA FOTOREDUKSI Cr(VI) MENJADI Cr(III) OLEH SEMIKONDUKTOR ZnO Santoso, Uripto Trisno; Herdiansyah, Herdiansyah; Santosa, Sri Juari; Siswanta, Dwi
Jurnal Sains dan Terapan Kimia Vol 1, No 1 (2007)
Publisher : Jurnal Sains dan Terapan Kimia

Show Abstract | Original Source | Check in Google Scholar

Abstract

Pengaruh subfraksinasi dan pH terhadap sensitisasi asam humat (AH) pada fotoreduksi Cr(VI) menjadi Cr(III) oleh semikonduktor ZnO telah diteliti. AH diekstraksi dari tanah gambut yang berasal dari Kecamatan Gambut, Kabupaten Banjar, Kalimantan Selatan. Subfraksinasi AH menjadi subfraksi asam humat (SAH) dilakukan dengan menggunakan metode sentrifugasi. Fotoreduksi dilakukan dengan menggunakan dua buah lampu UV 30 watt model TUV (produksi Philips) yang diletakkan di dalam kotak penyinaran pada jarak sekitar 20 cm di atas sampel. Pada setiap percobaan, sebanyak 500 mL sampel diradiasi dengan cahaya UV. Semikonduktor ZnO (produksi Merck) disuspensikan ke dalam air dengan konsentrasi 2 g/L. Hasil penelitian menunjukkan bahwa SAH yang berbobot molekul lebih rendah menunjukkan efektivitas yang lebih baik sebagai sensitizer daripada SAH yang berbobot molekul lebih besar. Keasaman medium dapat mempengaruhi sensitisasi SAH pada fotoreduksi Cr(VI) oleh ZnO. Kemampuan SAH untuk mensensitisasi fotoreduksi Cr(VI) oleh semikonduktor ZnO pada pH 5 lebih baik daripada kemampuan sensitisasinya pada pH 1.Kata kunci: asam humat, subfraksi, sensitisasi, fotoreduksi.
SISTEM PENURUNAN KADAR KROM (III) LIMBAH CAIR INDUSTRI PENYAMAKAN KULIT DENGAN KOMBINASI PRESIPITASI MENGGUNAKAN NATRIUM HIDROKSIDA DAN ADSORPSI MENGGUNAKAN BAGASE FLY ASH -, Meirinna; Fahrurrozi, Moh.; Santosa, Sri Juari
ASEAN Journal of Systems Engineering Vol 1, No 2 (2013): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

Show Abstract | Original Source | Check in Google Scholar

Abstract

Wastewater in the tannery industry is the main waste due to the use of a great amount of water and chemical substances in the process. Wastewater which contains chromium from the tanning materials potentially causes physical and chemical changes in the environment. Chromium is harmful heavy metal which is non-degradable and able to cause danger towards environment and human health. Therefore, it is important to employ treatments before discharging the wastewater to the environment. One of the known methods to reduce the content of heavy metal is precipitation using sodium hydroxide. However, precipitation alone can not meet the strict quality standard for tannery industrial wastewater. Adsorption using bagasse fly ash (BFA) is a key promising tertiary method to achieve the high treatment standard. BFA is a low cost adsorbent since it is prepared from solid waste from sugar industry. This research aims to study optimum operating condition of the implementation of a combination of precipitation and adsorption methods for reducing chromium (III) in the tannery industrial wastewater.Initially, this study used synthetic waste to obtain optimum conditions for adsorption method. The optimum conditions were then tested using real waste from tannery industry. Synthethic waste used in this process was Cr(NO3)3.9H2O. Adsorption process used both activated BFA as well as raw (un-activated) BFA. Concentration of crom (III) in the filtrate was determined by AAS (Atomic Absorption Spectrocopy). Parameters of the study were pH of the precipitation, and pH of the adsorption.Results of this study showed that the optimum pH to chrom (III) concentration reduction is achieved from the combination of precipitation at pH of 8 and adsorption at pH of 5. The effectiveness of the concentration reduction of chromium using combination of both of these methods managed to lower the concentration of chromium from initial concentration of 544 mg/l to 0,18 mg/l (using activated BFA), with the effectiveness of chromium reduction 99.97%. This result complies with the standard based on Yogyakarta Governors decree number 7/2010 about wastewater quality standard for wet blue leather industrial activities, which is 0,4 mg/l.
KAJIAN ADSORPSI Ag(S2O3)23- DALAM LIMBAH FOTOGRAFI PADA ADSORBEN KITIN DAN ASAM HUMAT TERIMOBILISASI PADA KITIN Khoerunnisa, Fitri; Santosa, Sri Juari; Kunarti, Eko Sri
Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Vol 9, No 2 (2007): Jurnal Pengajaran MIPA
Publisher : Faculty of Mathematics and Science Education, Universitas Pendidikan Indonesia

Show Abstract | Original Source | Check in Google Scholar | Full PDF (218.241 KB)

Abstract

This work was started with isolation of humic acid from peat soil and chitin from crab shell, immobilization of humic acid on chitin, and characterization of adsorbents of C and HAC. Optimum condition was studied by interacting the adsorbents with Ag(S2O3)23- in a synthetic solution on various  of pH from 2 to 10. Adsorption rate was studied by interacting the adsorbent with Ag(S2O3)23- in the synthetic solution on various time from 2 to 120 minutes. The determination of the energy and the capacity of adsorption were studied by interacting the adsorbent with Ag(S2O3)23- on various initial concentration from 2 to 75 ppm. Moreover, the mechanism of adsorption was studied by applying a sequential desorption using H2O, Na2EDTA 0.1 M, KSCN 0.5 M, and KOH 1 M. The adsorption of Ag(S2O3)23- in photography wastewater on C and on HAC were studied at the same condition as obtained for the synthetic solution. The result showed that pH 2 was the optimum adsorption condition for Ag(S2O3)23- in the synthetic solution on both C and HAC adsorbents. Ag(S2O3)23- in the synthetic solution was chemically adsorbed on C and on HAC, involving energy adsorption of 22.74–23.30 kJ/mole, respectively. Adsorption of Ag(S2O3)23- on C was faster than that on HAC with the rate constants for adsorbent C and HAC were 73 x 10-4 and 46 x 10-4 minute-1, respectively. Adsorption capacity of Ag(S2O3)23- on C and on HAC were 2.107 x 10-4 and 1.818 x 10-4 mole/g, respectively. The amount of Ag(S2O3)23- in photography wastewater that was adsorbed on C and on HAC were 13.52 and 12.47 mg/L, respectively. The hydrogen bonding and ion exchange were the dominant mechanism of adsorption.Key words: Ag(S2O3)23-, adsorption, chitin, immobilization, humic acid.
THE EFFECT OF NaOH CONCENTRATION AND TEMPERATURE ON ZEOLITE SYNTHETIS FROM FLY ASH BY HIDROTHERMAL ALKALI Jumaeri, Jumaeri; Sutarno, Sutarno; Kunarti, Eko Sri; Santosa, Sri Juari
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
Publisher : Jurnal Zeolit Indonesia

Show Abstract | Original Source | Check in Google Scholar | Full PDF (803.518 KB)

Abstract

Zeolite synthesis from coal fly ash PLTU Tanjung Jati Japara was conducted by hydrothermal alkali. Preparation was done on fly-ash that has been refluxed with 1M of HCl and without refluxed. NaOH with certain concentration (2, 3, and 4M) was mixed with coal fly-ash by ratio 10 ml each 1 gram of fly ash into Teflon tube 100 ml at autoclave stainless-steel. Then, autoclave was heated on the oven at temperature of 120-1600C. Synthetic zeolite ouput was qualitative tested by using infrared spectroscopy, X-Ray diffraction, and SEM. The result showed that NaOH concentration, temperature, and hydrothermal alkali period of coal fly ash was affecting characterization of zeolite ouput. The temperature which use for optimally hydrothermal processes exist on range 140 –160oC. The increase of temperature causes improving crystallization of zeolite products. Hydrothermal synthetic product from fly ash is alumina-silica compound which are a mixture of some crystals such as P zeolite, Y zeolite, sodalite, mullite, and quartz.
PEMANFAATAN SENYAWA POLI-MONOALILOKSI-KALIK[6]ARENA SEBAGAI ANTIDOTUM KERACUNAN KADMIUM PADA MENCIT Prabawati, Susy Yunita; Jumina, Jumina; Mustofa, Mustofa; Santosa, Sri Juari
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 20, No 2 (2013)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Original Source | Check in Google Scholar

Abstract

Pada penelitian ini dipelajari kemampuan dari senyawa poli-monoaliloksi-kaliks[6]arena (PMK[6]H) sebagai antidotum keracunan Cd pada mencit. Penelitian ini mengikuti rancangan acak lengkap dengan menggunakan mencit jantan, galur Balb/C, sehat, umur 2-3 bulan dan mempunyai bobot badan yang seragam. Subjek uji sebanyak 30 ekor dikelompokkan menjadi 6 kelompok. Kelompok 1 adalah kelompok mencit yang diberi pakan normal dan larutan CMC 0,5%. Kelompok 2 (kontrol negatif ) diberi pakan normal dan dicekok larutan CdCl2 (3,15 mg selama 14 hari pada setiap pagi). Kelompok 3 adalah kelompok kontrol positif (kontrol antidotum) dan kelompok 4-6 adalah kelompok eksperimen. Kelompok 3-6 diberi pakan normal dan dicekok larutan CdCl2 selama 14 hari pada setiap pagi dan sore harinya diobati dengan dimerkaprol (0,65 mg/Kg BB) untuk kelompok 3 dan PMK[6]H untuk kelompok eksperimen dengan dosis masing-masing 0,22; 0,65; dan 1,95 mg/Kg BB dalam CMC 0,5%. Pengamatan gejala toksik dilakukan selama 14 hari. Pada akhir masa uji, mencit dikorbankan untuk selanjutnya diambil ginjal dan hatinya untuk diukur kadar Cd dengan menggunakan spektrofotometer serapan atom (AAS) dan untuk pengamatan histopatologi. Hasil penelitian menunjukkan adanya penurunan kadar Cd dalam ginjal mencit pada kelompok 3-6 yaitu berturut-turut sebesar 14,98; 15,22; 30,92; dan 45,61 %. sedangkan kadar Cd dalam hati mengalami penurunan masing-masing sebesar 23,37; 25,79; 31,82; dan 35,66 %. Berdasarkan data tersebut, maka PMK[6]H dapat menurunkan kadar Cd dalam ginjal dan hati mencit yang telah diracuni dengan CdCl2 bahkan pada tingkat dosis yang sama, PMK[6]H memberikan penurunan kadar Cd yang lebih besar dari dimerkaprol.
Kinetics Study Of Au(Iii) Adsorption On Gallic Acid Intercalated Mg/Al-Hydrotalcite Yanti, Ika; Santosa, Sri Juari; Kartini, Indriana
Eksakta: Jurnal Ilmu-Ilmu MIPA VOLUME 16, ISSUE 1, February 2016
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Original Source | Check in Google Scholar

Abstract

Studi kinetika adsorpsi Au(III) pada Mg/Al-Hidrotalsit (Mg/Al-HT) terinterkalasi asam galat (AG) dilakukan dengan cara interaksi antara larutan Au(III) dalam spesies AuCl4- dengan sejumlah Mg/Al-HT-AG yang disintesis melalui metode kopresipitasi langsung (direct synthesis). Parameter yang digunakan dalam penentuan kinetika adsorpsi adalah variasi waktu kontak dan untuk untuk penentuan isoterm adsorpsi dilakukan variasi konsentrasi Au(III) dengan waktu kontak optimum. Analisis kandungan Au(III) yang tidak teradsorpsi pada adsorben Mg/Al-HT terinterkalasi AG dilakukan analisis dengan AAS. Adsorpsi Au(III) oleh Mg/Al-HT terinterkalasi AG yang berlangsung pada pH 3 mengikuti model kinetika pseudo orde dua dengan konstanta laju (k) 3,798x10-4 g.mg-1.menit-1serta model isoterm adsorpsimengikuti model isoterm Langmuir dengan kapasitas adsorpsi (qmaks) 625 mg.g-1.
PENERAPAN FREUNDLICH MODEL PADA ADSORPSI-REDUKTIF ISOTHERM AUCL4¯ DENGAN ASAM HUMAT Ismillayli, Nurul; Santosa, Sri Juari; Siswanta, Dwi
Jurnal PIJAR Vol 10, No 2 (2015)
Publisher : Jurnal PIJAR

Show Abstract | Original Source | Check in Google Scholar | Full PDF (51.393 KB)

Abstract

Abstrak: Telah dilakukan adsorpsi reduktif isotherm AuCl4¯ dengan menggunakan asam humat hasil isolasi tanah gambut Rawa Pening, Ambarawa. Isolasi dilakukan melalui perendaman alam 0,1 M NaOH dan dilanjutkan dengan pemurnian menggunakan 0,1 M HCl/0,3 M HF. Asam humat hasil isolasi dikarakterisasi menggunakan spektroskopi inframerah, ditentukan kadar abunya dan diaplikasikan untuk adsorpsi reduksi isotherm larutan AuCl4¯. Hasil karakterisasi menunjukkan bahwa asam humat hasil isolasi memiliki gugus –COOH, -OH fenolik, hidrokarbon alifatik dan aromatis dengan kadar abu sebesar 1,13%. Data adsorpsi AuCl4¯  dengan menggunakan asam humat lebih menunjukkan kecocokan dengan persamaan Freundlich di banding Langmuir, dengan harga R=0,92, n=1,7184 dan log KF= 4,1707. Reduksi Au(III) menjadi Au(0) oleh asam humat dikonfirmasi dengan munculnya puncak tajam baru dengan nilai 2θ =38, 44, 64 dan 77° yang merupakan puncak karakteristik dari partikel emas. Kata kunci: adsorpsi reduktif isotherm, AuCl4¯, asam humat, Freundlich.                                                                                   Abstract: Isotherm adsorption reductive of AuCl4¯ by using isolated humic acid of Rawa Pening peat soil, Ambarawa had been conducted. Isolation was done by soaking peat soil in 0.1 M NaOH and following by purification in 0.1M HCl/0.3 HF. The isolated humic acid was characterized using infrared spectroscopy, determined its ash contain and aplicated for isotherm adsorption reductive of AuCl4¯. FTIR spectra indicated that isolated humic acid consist of COOH group, phenolic –OH, aliphatic hydrocarbon and aromatic ring, its ash content was 1.13%. Asorption data of AuCl4¯  showed more suitable for Freundlich model than Langmuir model, with R=0,92, n=1,7184 and log KF= 4,1707. Reduction of Au(III) to Au(0) was confirmed by appearance of sharp peak at 2θ = 38, 44, 64 dan 77° as characteristic peak of gold particles.Keywords: Isotherm adsorption reductive, AuCl4¯ , humic acid, Freundlich.
KAJIAN SPEKTRA FTIR PADA MEMBRAN KOPOLI (EUGENOL-DIVINILBENZENA), CO-EDVB SEBAGAI SENYAWA PEMBAWA UNTUK TRANSPOR FENOL Kiswandono, Agung Abadi; Girsang, Ermi; Pulungan, Ahmad Nasir; Sihombing, Juniva Laila; Siswanta, Dwi; Aprilita, Nurul Hidayat; Santosa, Sri Juari; Hayashita, Takashi
Prosiding SNPS (Seminar Nasional Pendidikan Sains) 2015: Prosiding SNPS (Seminar Nasional Pendidikan Sains)
Publisher : Universitas Sebelas Maret Surakarta

Show Abstract | Original Source | Check in Google Scholar | Full PDF (33.153 KB)

Abstract

Telah dilakukan kajian transpor fenol melalui membran berbasis senyawa divinil benzena (DVB)tertaut silang dengan metode PIM.Kajian transpor fenol ini menggunakan chamber sebagai alat transpor yang memisahkan fasa sumber dan fasa penerima. Beberapa evaluasi yang mempengaruhi transpor menggunakan membran PIMtelah dilakukan diantaranya adalah uji stabilitas membran, umur membrandan pemakaian berulang kemudian membran PIM sebelum dan setelah transpor dikarakterisasi menggunakan FTIR. Hasil penelitian menunjukkan bahwa membran PIM yang mengandung senyawa tertaut silang co-EDVB ini, kecepatan pengadukan, jenis agen tertaut silang, konsentrasi plasticizer dan garam NaNO3 berpengaruh terhadap hilangnya komponen penyusun membran (ML loss). Berdasarkan hasil FT-IR, didapatkan bahwa membran yang mengandung senyawa pembawa dienaini, komponen penyusun membran yang hilang didominasi oleh senyawa pembawanya sedangkan indikasi hilangnya komponen penyusun membran dapat terlihat pada hasil FT-IR setelah digunakan untuk transpor, yakni hilangnya puncak ‒OH pada spektra FT-IR.