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All Journal VALENSI CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) CHEMISTRY PROGRESS International Journal of Science and Engineering (IJSE) Jurnal Penelitian Sains (JPS) Jurnal Kedokteran Brawijaya Jurnal Matematika & Sains Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research AGRIVITA, Journal of Agricultural Science Jurnal Penelitian Sains (JPS) IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) JPSriwijaya Indonesian Journal of Chemical Science Science and Technology Indonesia Jurnal Penelitian Sains Indonesian Journal of Chemistry Communications in Science and Technology IJEMS (Indonesian Journal of Environmental Management and Sustainability) Riau Journal of Empowerment Molekul: Jurnal Ilmiah Kimia Sains dan Matematika SRIWIJAYA JOURNAL OF ENVIRONMENT Makara Journal of Science Makara Journal of Technology Aceh International Journal of Science and Technology Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Material Research Bumi: Jurnal Hasil Kegiatan Sosialisasi Pengabdian Kepada Masyarakat

Aldes Lesbani

Universitas Sriwijaya

Author-ID : 305968

Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences

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5-Aminolevulinic Acid Lessened Growth Suppression in Snap Bean (Phaseolus vulgaris L.) Exposed to Shallow Water Table Haris Kriswantoro; Benyamin Lakitan; Aldes Lesbani; Andi Wijaya
AGRIVITA, Journal of Agricultural Science Vol 42, No 2 (2020)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v0i0.2308

Shallow water table (SWT) is an acute problem in cultivating vegetables at riparian wetland during transitional period from dry to rainy season. SWT limits volume of aerobic rhizosphere and reduces oxygen availability. Meanwhile, 5-aminolevulinic acid (ALA) has been known for its effectiveness in offsetting negative effects of abiotic stresses. The aim of this study was to evaluate effectiveness of ALA application at pre- or during continuous 20-day SWT exposure in snap bean. SWT exposures were set at depth of 5 cm (SWT-5), 10 cm (SWT-10) and 15 cm (SWT-15) below substrate surface. ALA was applied at 4 days before SWT initiation (14 DAP), mid of SWT exposure period (28 DAP), or at end of SWT exposure (38 DAP). Results of this study indicated that SWT exposure affected growth of shoots and roots, leaf water status, proline content, and SPAD value in snap bean plant. Shallowest water table (SWT-5) caused the most severe effects. Effectiveness of ALA application was depended on time difference between ALA application and onset of SWT exposure. ALA application did not significantly improve recovery of snap bean plants after SWT exposure was terminated.

Modification Of Zn-Cr Layered Double Hydroxide With Keggin Ion [?-SiW12O40]4- AS Cr(VI) Adsorbent Melantina Melan Oktriyanti; Neza Rahayu Palapa; Risfidian Mohadi; Aldes Lesbani
Indonesian Journal of Environmental Management and Sustainability Vol. 3 No. 3 (2019): September
Publisher : Research Centre of Inorganic Materials and Complexs

Abstract: In this study, synthesis of layered double hydroxide of Zn-Cr and Zn-Cr intercalated with keggin ion [SiW12O40]4- have been carried out. The synthesized material was characterized using XRD, BET, and FTIR. Material of Zn-Cr layered double hydroxide and the intercalation results are used as Cr(VI) ion adsorbent. Factors that influence the adsorption process studied to obtain kinetic and thermodynamic parameters include time, concentration and temperature variation of adsorption. Based on XRD characterization, the distance between layers from 7,53 ? on the Zn-Cr layered double hydroxide before intercalation to 10,26 ? on Zn-Cr layered double hydroxide intercalated with keggin ion [SiW12O40]4-. BET analysis showed that the surface area of both materials increased from 31,638 m2/g to 128,871 m2/g. The result of pH Point Zero Charge measurement for the Zn-Cr layered double hydroxide material is 10 while the Zn-Cr intercalated with keggin ion [SiW12O40]4- material is 8. Based on the kinetics model, adsorption of Cr(VI) ion follows pseudo-second-order model with a linear regression coefficient close to 1. Furthermore, the intercalation of the Zn-Cr intercalated with keggin ion [SiW12O40]4- shows the higher adsorption capacity for the Cr(VI) ion than the Zn-Cr layered double hydroxide as a control. Keywords: adsorption, Cr(VI), keggin ion, layered double hydroxide, Zn-Cr

Performance of Graphite for Congo Red and Direct Orange Adsorption Rananda Vinsiah; Risfidian Mohadi; Aldes Lesbani
Indonesian Journal of Environmental Management and Sustainability Vol. 4 No. 4 (2020): December
Publisher : Research Centre of Inorganic Materials and Complexs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2020.4.4.125-132

To investigate its ability, graphite material was characterized by X-Ray diffraction (XRD), Fourier Transform Infrared Spectrophotometer (FTIR), Thermo Gravimetry Differential Thermal Analyse (TG-DTA), and Brunauer Emmet Teller (BET). Adsorption capability was evaluated by using Congo Red dye and Direct Orange dye solutions. The experiment was studied by using kinetic, isotherm, and thermodynamic parameters. The result of XRD characterization showed that graphite has four characteristic peaks which are 26,405?(002), 44,50?(101), 54,45?(004), and 77,32?(006). FT-IR characterization showed that the vibration at 3402 cm-1, 1635 cm-1, and 1381 cm-1. TG-DTA analysis showed that graphite has only one decomposition peak at 760 oC. BET analysis showed that the surface area of graphite was 11,558 m2/g. The optimum pH of CR and DO dyes were in pH 6 and pH 2 with contact time of 120 minutes. Kinetic adsorption model of CR and DO dye onto graphite follow pseudo-second-order model with a liner regression coefficient close to one. Isotherm parameter of CR and DO adsorption onto graphite follow Langmuir isotherm model with spontaneous endothermic process. The desorption process of graphite was used HCl to remove the dyes. Regeneration process of graphite showed that the capacity of adsorption decreased after it was reused 3 times.

Sintesis Tris(Thiophen)n-butil Germanium melalui Reaksi Arilasi Senyawa Thiophen dengan n-butil Germanium Aldes Lesbani; Risfidian Mohadi
Sains dan Matematika Vol. 2 No. 1 (2013): Oktober, Sains & Matematika
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

The arylation of 2-iodo thiophene and 3-iodo thiophen with n-butyl germanium using complex palladium as catalyst in argon atmospheric condition was carried out. Products of arylation were tris(2-thiophene)n-butil germanium (1) and tris(3-thiophene)n-butil germanium (2). Compounds (1) and (2) were characterized using GC-MS, 1H and 13C NMR. The results showed that compounds (1) and (2) were colorless oil with the yield 20% and 25%, respectively. Both (1) and (2) have m/z 380. Measurement using 1H NMR gave different peaks of proton equivalent between (1) and (2) while 6 equivalent protons in (1) and 7 equivalent protons in (2). The measurement using 13C NMR gave 8 equivalent carbons both for compound (1) and (2).

Oxidation Of Cyclohexane To Cyclohexanol And Cyclohexanone Using H4[α-SiW12O40]/Zr As Catalyst Aldes Lesbani; Menik Setyowati; Risfidian Mohadi; Dedi Rohendi
Molekul Vol 11, No 1 (2016)
Publisher : Universitas Jenderal Soedirman

Synthesis and preparation of polyoxometalate H4[α-SiW12O40].nH2O with Zr as support at various weights of Zr 0.01g; 0.05 g; 0.25 g; 0.5 g; 0.75 g; 1 g and 1.25 g to form H4[α- SiW12O40]/Zr was conducted. The compounds from preparation were characterized using FTIR spectroscopy and crystallinity analysis using X-Ray diffraction. Thus H4[α- SiW12O40]/Zr was applied as catalyst for oxidation of cyclohexane to cyclohexanol and cyclohexanone. Oxidation process was studied through reaction time, hydrogen peroxide amount, temperature, and weight of catalyst. FTIR spectrum of H4[α-SiW12O40]/Zr was appeared at wavenumber 771.53-979.84 cm-1 and Zr at 486.06-1481.33 cm-1. Diffraction pattern of H4[α-SiW12O40]/Zr showed that high crystallinity was identified at 2θ 8o-10o and 28.3o. Based on FTIR spectrum and XRD powder pattern, the optimum preparation of H4[α-SiW12O40]/Zr was obtained using 0.5 g of Zr. The catalytic study of cyclohexane using H4[α-SiW12O40]/Zr at 0.5 g of Zr resulted conversion about 99.73%. Catalyst can convert cyclohexane with the highest conversion then used for further deep catalytic investigation. Optimization of oxidation process resulted optimum reaction time at 2 h, 3 mL of hydrogen peroxide amount, 80 oC of temperature, and 0.038 g of catalyst. The GCMS analysis indicated the oxidation of cyclohexane using H4[α-SiW12O40]/Zr at 0.5 g of Zr formed cyclohexanol and cyclohexanone with selectivity 18.77 and 23.57, respectively.

PENGGUNAAN SPEKTROSKOPI 31P NMR DAN FT-IR UNTUK KARAKTERISASI SENYAWA POLIOKSOMETALAT TIPE DAWSON (NH4)6[b-P2W18O62] DAN (NH4)6[a-P2W18O62] Aldes Lesbani; Risfidian Mohadi; Nurlisa Hidayati
Molekul Vol 7, No 2 (2012)
Publisher : Universitas Jenderal Soedirman

Telah disintesis senyawa polioksometalat tipe Dawson (NH4)6[b-P2W18O62] dan (NH4)6[a-P2W18O62] yang dilanjutkan dengan karakterisasi menggunakan spektrometer 31P NMR dan FT-IR. Hasil penelitian menunjukkan bahwa senyawa polioksometalat tipe Dawson memberikan sinyal 31P NMR yang berbeda untuk struktur b dan a. Struktur b pada (NH4)6[b-P2W18O62] menghasilkan dua puncak pada pergeseran kimia -10,90 dan -11,68 ppm sedangkan struktur a memberikan satu puncak pada pergeseran kimia -12,39 ppm yang mengindikasikan adanya rotasi unit W3O13 pada struktur b sebagai penyusun struktur Dawson. Hal ini diperkuat oleh perbedaan spektra FT-IR pada stuktur b yang memiliki vibrasi pada bilangan gelombang 1164 cm-1 sedangkan struktur a tidak. Secara umum spektra FT-IR untuk polioksometalat tipe Dawson (NH4)6[b-P2W18O62] dan (NH4)6[a-P2W18O62] tidak menunjukkan adanya pebedaan yang signifikan terutama pada bilangan gelombang disekitar 1090 cm-1 yang menunjukkan vibrasi P-O.

Cr/Al Pillared Bentonite and Its Application on Congo Red and Direct Blue Removal Muhammad Said; Afifah Rahma Dian; Risfidian Mohadi; Aldes Lesbani
Molekul Vol 15, No 3 (2020)
Publisher : Universitas Jenderal Soedirman

Bentonite was modified through pillarization with metal oxide Cr/Al in 2:1 and 1:2 ratio to obtain larger basal spacing of bentonite-layered structure. Pillarization was conducted via intercalation method at room temperature followed by calcination. The result was characterized by using XRD and FT-IR Spectrophotometer. XRD pattern shown pillarization by Cr/Al 2:1 ratio gave peak at 2θ 5.3° which is correspond to d = 16.4 Å. At 1:2 Cr/Al ratio, peak appears at 2θ 6.4° that is related to d = 13.7 Å. FTIR Spectroscopy measurement gave inconclusive result. The Cr/Al pillared bentonite at 2:1 ratio was applied as adsorbent on Congo red and Direct blue dyes. The result indicates the adsorption follows Freundlich isotherm. Adsorption rate for both dyes follows pseudo-second order with rate constant of pillared bentonite higher than natural one. Adsorption isotherm concludes that Freundlich isotherm is favorable compare to Langmuir. Thermodynamic evaluation suggests that isotherm occurs spontaneously in an exothermic process.

SINTESIS DAN KARAKTERISASI SENYAWA OKSOTRINUKLIR [Cr3O(OOCC6H5)6(H2O)3](NO3)×nH2O Aldes Lesbani; Risfidian Mohadi
Molekul Vol 8, No 2 (2013)
Publisher : Universitas Jenderal Soedirman

Senyawa oksotrinuklir telah disintesis menggunakan kromium nitrat dan asam benzoat dalam etanol pada temperatur 80 oC selama 1 jam.Kristal senyawa oksotrinuklir hasil sintesis dikarakterisasi menggunakan spektrofotometer FTIR, 1H NMR padat, X-Ray Difraktometer, TGA, dan MS dengan teknik ionisasi dingin. Hasil penelitian menunjukkan bahwa senyawa oksotrinuklir mempunyai vibrasi yang khas pada bilangan gelombang 671 cm-1(ν Cr3-O). Identifikasi dengan spektrometer massa dalam asetonitril sebagai pelarut menunjukkan fragmentasi pada m/z: 1021.83 [Cr3O(OOCC6H5)6(MeCN)3]+, 998,80 [Cr3O(OOCC6H5)6(MeCN)2(H2O)]+, 980,79 [Cr3O(OOCC6H5)6(MeCN)2]+, 939,73 [Cr3O(OOCC6H5)6(MeCN)]+. Puncak yang lebar dan besar pada spektrum 1H NMR menunjukkan bahwa kromium yang bersifat paramagnetic di dalam senyawa. Pola XRD menunjukkan bahwa senyawa oksotrinuklir adalah kristalin dan hasil termogravimetri menunjukkan senyawa oksotrinuklir stabil sampai suhu 174 oC dan mempunyai 5 mol air kristal. Dari hasil karakterisasi FTIR,1H NMR, XRD, TGA, dan MS dapat disimpulkan bahwa senyawa yang terbentuk adalah [Cr3O(OOCC6H5)6(H2O)3](NO3)×5H2O.

KARAKTERISASI SENYAWA POLIOKSOMETALAT TIPE KEGGIN TERSUBSTITUSI VANADIUM MENGGUNAKAN FT-IR DAN 51V NMR Aldes Lesbani
Molekul Vol 7, No 1 (2012)
Publisher : Universitas Jenderal Soedirman

Sintesis dan karakterisasi senyawa polioksometalat tipe Keggin yakni Rb2K2[γ-SiV2W10O38(OH)2]•nH2O dan H4[γ-SiV2W10O38(OH)2]•nH2O telah dilakukan menggunakan FT-IR dan spektroskopi 51V NMR. Senyawa polioksometalat Rb2K2[γ-SiV2W10O38(OH)2]•nH2O ditransformasi menjadi H4[γ-SiV2W10O38(OH)2]•nH2O melalui metode pertukaran ion menggunakan asam klorida. Spektrum 51V NMR dari Rb2K2[γ-SiV2W10O38(OH)2]•nH2O menunjukkan pergeseran kimia pada -586.94 ppm. Vibrasi utama yang menunjukkan gugus fungsional senyawa Rb2K2[γ-SiV2W10O38(OH)2]•nH2O muncul pada bilangan gelombang 1041 cm-1, 972 cm-1 (n W=O), 914 cm-1 (n Si-O), 870 cm-1 (nW-Oe-W), 781 cm-1 (n W-Oc-W), 565 cm-1 dan 534 cm-1. Pergeseran kimia 51V NMR dari senyawa polioksometalat H4[γ-SiV2W10O38(OH)2]•nH2O memberikan satu puncak pada -586.77 ppm. Pergeseran kimia antara senyawa Rb2K2[γ-SiV2W10O38(OH)2]•nH2O dan H4[γ-SiV2W10O38(OH)2]•nH2O tidak berubah yang disebabkan oleh kemiripan struktur utama di antara dua senyawa polioksometalat tersebut. Vibrasi utama dari senyawa polioksometalat H4[γ-SiV2W10O38(OH)2]•nH2O juga mempunyai kemiripan dengan senyawa polioksometalat Rb2K2[γ-SiV2W10O38(OH)2]•nH2O yang disebabkan hanya kation yang berubah menjadi asam.

STUDI REAKSI KOPLING OKTADESILSILAN DENGAN ARIL IODIDA TERSUBSTITUSI PARA Aldes Lesbani; Risfidian Mohadi; Nurlisa Hidayati; Elfita Elfita
Molekul Vol 8, No 1 (2013)
Publisher : Universitas Jenderal Soedirman

Telah dilakukan reaksi kopling oktadesilsilan dengan 4-iodida tioanisol dan 4-iodida anisol pada posisi para menggunakan katalis paladium dalam kondisi atmosfir argon/nitrogen menghasilkan senyawa tris-(4-tioanisil)-oktadesilsilan (1) dan tris-(4-metoksifenil)-oktadesilsilan (2)Hasil penelitian ini diperoleh senyawa (1) berupa kristal putih dengan titik leleh 59,8-60,5 oC dan puncak ion molekul sebesar m/z 650 Sedangkan untuk senyawa (2) mempunyai titik leleh 53,5-54,0 oC dengan nilai m/z 602. Karakterisasi menggunakan 1H dan 13C NMR menghasilkan puncak-puncak pergeseran kimia yang menunjukkan senyawa (1) adalah tris-(4-tioanisil)-oktadesilsilan dan senyawa (2) adalah tris-(4-metoksifenil)-oktadesilsilan (2)

Co-Authors A. Agnes Abi Sueb Abriyanto, Danang Addy Rachmat Adi Saputra Adi Saputra Adi Saputra Adi Saputra Afifah Rahma Dian Ahmad Fatoni Ahmad Fatoni Alfan Wijaya Alfan Wijaya Alfan Wijaya Amiruddin Supu Amri Amri Amri Andi Wijaya Andreas, Roy Andriani Azora Andriani Azora Anggraini, Ana Arini Fousty Badri Arini Fousty Badri Arison Musri Arison Musri Arsyad, Fitri Suryani Aslihati Aslihati Aslihayati Aslihayati Azhar Kholiq Badri, Arini Fousty Bakri Rio Rahayu Bakri Rio Rahayu Benyamin Lakitan Dedi Rohendi Dedi Setiabudidaya Desnelli Desnelli Dian Monariqsa Dian Monariqsa Didi Jasantri Dormian A N Haloho Dormian A N Haloho Eiffel Ostan Jeski Gultom Elfita Elfita . Elfita Elfita Eliza . Eliza Eliza Eliza Eliza Ema Veronika Turnip Endri Junaidi Eriza Sativa Erviana, Desti Fahma Riyanti Fatmawati Fatmawati Ferlinahayati Ferlinahayati Fitri Suryani Arsyad Fitri, Erni Salasia Fitriliana Fitriliana Hanifah, Yulizah Haris Kriswantoro Hermansyah Hermansyah Hermansyah Hermansyah Hesti A. Harahap Hesti A. Harahap, Hesti Hidayatullah, Muhammad Hilda Zulkifli Hilda Zulkifli Hilda Zulkifli Hiroshi Nishihara Hitoshi Kondo Idha Royani Intan Permata Sari Irfannuddin Irfannuddin Jasantri, Didi Jefri Jefri Jeri Ramadhan Juleanti, Novie Kiki Anggraini Kiki Anggraini Kiki Anggraini, Kiki Komis Krisna Murti Laila Hanum Leni Sinaga Lestari Simanjuntak Lestari Simanjuntak Liasari, Beta Riana Lingga, Fitra Wahyuni Lora Vitanesa Lucyanti . Lucyanti Lucyanti Lusi Teresia Mardianto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto Mardiyanto, Marieska Verawaty Mariska Verawaty Melantina Melan Oktriyanti Melwita, Elda Menik Setyowati Mikha Meilinda Christina Miksusanti Miksusanti Muhammad Imron MUHAMMAD SAID Muhammad Said Muhammad Said Muhammad Said Najma Annuria Fithri Najma Annuria Fithri Najma Annuria Fithri Najma Annuria Fithri, Najma Annuria Narsito Narsito Neza Rahayu Niken Oktora Niken Oktora Nirwan Syarif Normah Normah Normah Normah, Normah Nova Yuliasari Novie Juleanti Novie Juleanti Novie Juleanti Nur Ahmad Nur Ahmad, Nur Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nurlisa Hidayati Nur’aini, Siti Nyanyu Ummu Hani Palita Tamba Patimah Mega Syah Bahar Nur Siregar Patimah Mega Syah Bahar Nur Siregar Patimah Mega Syah Bahar Nur Siregar Poedji Loekitowati Hariani Putri Erlyn Putri, Bunga Indah R.A. Mika Melviana Rabelia Juladika Sayeri Radja Nardo Purba Rakhmawati Farma Ramadhan, Jeri Rananda Vinsiah Randi O. Saragih Ratna, L.P Ratna, L.P Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risfidian Mohadi Risma Kurniawati M Rohmatullaili Rohmatullaili, Rohmatullaili Roy Andreas Sabat Okta Ceria Sitompul, Sabat Okta Ceria Samat Samat Savira, Dila Setiawan Yusuf Setiawati Yusuf Setiawati Yusuf Sherly Agustina, Sherly Siregar, Patimah Mega Syah Bahar Nur Sitanggang, Jonra P. Soerya, Balada Sri Juari Santosa Suheryanto Suheyanto Suheryanto Sumiati Sumiati SUMIATI, Susila Arita Syaflina Lamin Syafrina Lamin, Syafrina Tamizi Taher Tarmizi Taher Welinda Me Wibiyan, Sahrul Wijaya, Alfan Winda Fitriana Yeni Iswanti Yoshinori Yamanoi Yosi Saria Yosi Saria Yosi Saria Yosine Susi Yosine Susie Yunita Irianty Zahara, Zaqiya Artha Zazili Hanafiah Zultriana

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