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All Journal The Journal of Pure and Applied Chemistry Research Jurnal Kartika Kimia EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Jurnal Ilmiah Farmasi Farmasyifa Jurnal Riset Sains dan Kimia Terapan Jurnal Abdimas Kartika Wijayakusuma Jurnal Farmasi Klinik dan Sains International Journal of Applied Research and Sustainable Sciences (IJARSS) Serambi Engineering
Rusnadi Rusnadi
Institut Teknologi Bandung
Religion Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Social Sciences Other

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PRAKONSENTRASI DAN ANALISIS ION KADMIUM BERBASIS FLOW INJECTION ANALYSIS Hasanah, Uswatun; Rusnadi, -; Amran, Bachri
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Publisher : Fakultas Matematika dan ilmu pengetahuan Alam. Universitas Pakuan.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (535.967 KB)

Abstract

CD-imprinted polymers (Cd-IPs) have been synthesized and retensinya properties have been studied for the pre concentration and analysis of cadmium concentration at the level of µ g L-1berbasis technique of flow injection analysis (FIA). This procedure is based on the retention of ions Cd (II) on Cd-IPs are synthesized. Retention cadmium ions can elution quantitatively with a solution of nitric acid directly onto the nebulizer system for atomic absorption spectrometer. The retention capacity of the Cd-IPs acquired for 20.10 mg g-1pada pH optimum and shows a quick retention kinetics. Analytical parameters such as retention capacity, the volume of the sample, the concentration and volume of eluen have been evaluated to obtain a good analytical performance. The system being developed makes it possible to analyze 15 samples per hour, with a limit of detection of the 8 µ g L-1. For the concentration of 50 μg L-1 has obtained precision values expressed as percent relative standard deviation of 1.6 (n = 5). A method of analysis that was developed has been used for the determination of cadmium in river water samples Cidurian, West Java, Indonesia with satisfactory results. Key words:  consentration, analyzing miniscule, cadmium, FIA
Coffee Biomass Encapsulated in Calcium Alginate as Material for Lead (II) Adsorption from Aqueous Solutions Sarina Hanifah; Rusnadi Rusnadi; M. Bachri Amran
The Journal of Pure and Applied Chemistry Research Vol 10, No 1 (2021): Edition January-April 2021
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2021.010.01.577

Abstract

This work aims to study the removal of lead (II) from aqueous solutions with Ca-Alginate (CA)  and Coffee-Calcium-Alginate (CCA). The coffee biomass were successfully prepared as the material to be encapsulated in calcium alginate. The characterization of the synthesized CA and CCA was performed using fourier transform infrared and scanning electron microscopy. The method used was batch study. Various factors which affected adsorption efficiency of lead (II) ions by CA and CCA, such as pH, agitation time, and adsorbent dose were investigated for determination of optimum experimental conditions. The result showed that CA and CCA had significant effects on adsorption of lead (ІІ) ions at pH = 4, agitation time of more than 120 min, and the adsorbent dose was 0.05 gram. Moreover, the Langmuir isotherm model showed that maximum adsorption capacity (qm) was 163.66 mg/g and 176.99 mg/g respectively for CA and CCA. The Langmuir isotherm was better described the adsorption equilibrium. Both of the adsorbent fitted to pseudo second order equations. These results demonstrated that CA and CCA show great potential to remove Pb(ІІ) ions from aqueous solutions.
PRAKONSENTRASI DAN ANALISIS ION KADMIUM BERBASIS FLOW INJECTION ANALYSIS Uswatun Hasanah; - Rusnadi; Bachri Amran
EKOLOGIA Vol 15, No 2 (2015): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (535.967 KB) | DOI: 10.33751/ekol.v15i2.203

Abstract

CD-imprinted polymers (Cd-IPs) have been synthesized and retensinya properties have been studied for the pre concentration and analysis of cadmium concentration at the level of g L-1berbasis technique of flow injection analysis (FIA). This procedure is based on the retention of ions Cd (II) on Cd-IPs are synthesized. Retention cadmium ions can elution quantitatively with a solution of nitric acid directly onto the nebulizer system for atomic absorption spectrometer. The retention capacity of the Cd-IPs acquired for 20.10 mg g-1pada pH optimum and shows a quick retention kinetics. Analytical parameters such as retention capacity, the volume of the sample, the concentration and volume of eluen have been evaluated to obtain a good analytical performance. The system being developed makes it possible to analyze 15 samples per hour, with a limit of detection of the 8 g L-1. For the concentration of 50 ?g L-1 has obtained precision values expressed as percent relative standard deviation of 1.6 (n = 5). A method of analysis that was developed has been used for the determination of cadmium in river water samples Cidurian, West Java, Indonesia with satisfactory results.Key words: consentration, analyzing miniscule, cadmium, FIA
Optimasi Pereaksi Warna Carik Uji untuk Analisis Kualitatif Kalium Bromat pada Makanan Riesma Azhar Falahul Alam; Hilda Aprilia Wisnuwardhani; Rusnadi Rusnadi
Jurnal Ilmiah Farmasi Farmasyifa Vol 1, No 1 (2018)
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jiff.v1i1.3077

Abstract

ABSTRAK Bahan tambahan pangan biasanya ditambahkan untuk meningkatkan mutu makanan. Namun, sering pula dijumpai penambahan zat yang dilarang penggunaannya dalam makanan. Salah satunya adalah kalium bromat. Untuk itu diperlukan suatu pereaksi untuk pendeteksian kalium bromat yang dapat dijadikan carik uji agar pendeteksian kalium bromat menjadi lebih mudah. Dalam penelitian ini dilakukan optimasi volume nanopartikel Ag dan konsentrasi acid red 14 sebagai pereaksi untuk carik uji kalium bromat. Acid red 14 ini akan teroksidasi menjadi tidak berwarna dengan adanya kalium bromat. Dari hasil penelitian ini, setiap 25 mL pereaksi terdiri dari 10 mL nanopartikel Ag; 0,002 mM acid red 14; dan 1 mL H2SO4 0,2 M.Kata kunci: Kalium bromat, nanopartikel Ag, acid red 14.ABSTRACT Food additives are usually added to improve food quality. But banned substance are often found e.g potassium bromate. Therefore we need a reagent to analyze the presence of potassium bromate and the reagent will be used to make a strip test for practical uses in detection potassium bromate. In this study, optimization of Ag nanoparticles volume and acid red 14 concentration has been done. Acid Red 14 was oxidized to colorless in the presence of potassium bromate. Result showed that each 25 mL reagent consist of 10 mL Ag nanopaticles; 0,002 mM acid red 14; and 1 mL 0,2 M H2SO4.Key words: Potassium bromate, Ag nanopaticles, acid red 14.
Optimasi Sintesis Perak Nanopartikel Menggunakan Ekstrak Daun Kawista (Limonia acidissima Groff) Humairani Rahman; Hilda Aprilia Wisnuwardhani; Rusnadi Rusnadi
Jurnal Farmasi Klinik dan Sains Vol 1, No 1 (2021): Jurnal Farmasi Klinik dan Sains
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Muhammadiyah Gombong

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (552.44 KB) | DOI: 10.26753/jfks.v1i1.671

Abstract

Metode sintesis nanopartikel perak pada umumnya dilakukan secara kimia dan fisika. Akan tetapi, kedua metode tersebut memiliki efek yang merugikan terhadap lingkungan. Metode green chemistry dikembangkan dengan pendekatan ramah lingkungan berdasarkan bioreduksi ekstrak tanaman Limonia acidissima Groff. Kondisi sintesis nanopartikel perak yang paling optimal yaitu dengan campuran AgNO3 1 mM, ekstrak dan penstabil dengan perbandingan (2:1:2) yang diaduk selama 5 jam. Hasil karakterisasi nanopartikel perak memiliki diameter partikel 319,3 nm dan indek polidispersitas 0,378
PRAKONSENTRASI DAN ANALISIS ION KADMIUM BERBASIS FLOW INJECTION ANALYSIS Uswatun Hasanah; - Rusnadi; Bachri Amran
Ekologia: Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Vol 15, No 2 (2015): Ekologia : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/ekol.v15i2.203

Abstract

CD-imprinted polymers (Cd-IPs) have been synthesized and retensinya properties have been studied for the pre concentration and analysis of cadmium concentration at the level of µ g L-1berbasis technique of flow injection analysis (FIA). This procedure is based on the retention of ions Cd (II) on Cd-IPs are synthesized. Retention cadmium ions can elution quantitatively with a solution of nitric acid directly onto the nebulizer system for atomic absorption spectrometer. The retention capacity of the Cd-IPs acquired for 20.10 mg g-1pada pH optimum and shows a quick retention kinetics. Analytical parameters such as retention capacity, the volume of the sample, the concentration and volume of eluen have been evaluated to obtain a good analytical performance. The system being developed makes it possible to analyze 15 samples per hour, with a limit of detection of the 8 µ g L-1. For the concentration of 50 μg L-1 has obtained precision values expressed as percent relative standard deviation of 1.6 (n = 5). A method of analysis that was developed has been used for the determination of cadmium in river water samples Cidurian, West Java, Indonesia with satisfactory results. Key words:  consentration, analyzing miniscule, cadmium, FIA
Pembuatan dan Penggunaan Bulir Kalsium Alginat-PVA untuk Adsorpsi Ion Cd(II) Rusnadi, Rusnadi; Safitri, Irin
Jurnal Kartika Kimia Vol 6 No 1 (2023): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v6i1.200

Abstract

Cadmium is widely used in electroplating, batteries, plastics, and paints. Cadmium is a toxic element for humans, affecting mainly the kidneys and the skeleton. Adsorption is an easy, effective, and inexpensive method for removing metal ions in wastewater. In this research, we have synthesized calcium alginate-PVA beads as Cd (II) ion adsorbent. The adsorbent characterization was carried out using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS). Determination of the adsorption conditions includes the composition of the adsorbent, pH, contact time, and adsorbent mass. The results showed that the optimum adsorption conditions on adsorbent composition are pH 4, contact time 4 hours, and mass of adsorbent 0.2 grams using a 25 mL volume solution in a batch system. The Cd(II) ion adsorption is followed by the Langmuir isotherm model and the pseudo-second-order kinetics model.
Komposisi Proksimat dari Gracilia Sp, Sargassum Sp, dan Ulva Lactuca di Pantai Sayang Heulang, Garut Selatan, Jawa Barat, Indonesia Rusli, Handajaya; Lestari, Sri Dewi; Iqbal, Muhammad; Rusnadi, Rusnadi
Jurnal Kartika Kimia Vol 6 No 2 (2023): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v6i2.229

Abstract

Karbohidrat, protein, lemak, dan mineral adalah kandungan utama rumput laut selain air. Kandungan utama ini dapat berbeda-beda dipengaruhi oleh kondisi lingkungan dan jenis rumput laut. Gracilaria sp, Sargassum sp, dan Ulva lactuca banyak tumbuh dan telah dimanfaatkan di pantai Sayang Heulang, Garut Selatan, Jawa Barat, Indonesia. Sayangnya, tidak ditemukan informasi kandungan utama rumput laut tersebut sebagai salah satu indikator kualitas rumput laut. Penelitian ini bertujuan untuk melakukan analisa proksimat terhadap ketiga rumput laut tersebut yang secara berurutan mewakili rumput laut coklat, rumput laut merah, dan rumput laut hijau. Analisa karbohidrat total dilakukan menggunakan metode Luff Schoorl dan didapatkan kadar 11,2 %(b/b); 25,3 % (b/b); dan 20,4 %(b/b) untuk berturut-turut Gracilaria sp, Sargassum sp, dan U. lactuca. Penentuan kadar protein total dilakukan menggunakan metode Kjeldahl-Nessler memberikan hasil 6,5 %(b/b) untuk Gracilaria sp, 7,8 %(b/b) untuk Sargassum sp, dan 8,7 %(b/b) untuk U. lactuca. Ekstraksi menggunakan Soxhlet digunakan untuk penentuan kandungan lemak dan didapatkan hasil 0,3 %(b/b) untuk Gracilaria sp, 1,6 %(b/b) untuk Sargassum sp, dan 1,1 %(b/b) untuk U. lactuca. Penelitian ini juga menunjukkanGracilaria sp, Sargassum sp, dan U. lactuca mengandung berturut-turut 26,9 %(b/b); 23,6 %(b/b); dan 32,5 %(b/b) mineral. Hal ini menunjukkan bahwa perbedaan jenis rumput laut memiliki kandungan bahan kimia yang berbeda.
Implementasi Percobaan Kimia Sederhana dalam meningkatkan Literasi Sains Siswa SMPN 1 dan SMAN 1 Sumedang Thoriq, Thoriq; Rahayu, Rizky Sri; Azis, Muhammad Yudhistira; Rusnadi, Rusnadi; Hardian, Arie
Jurnal Abdimas Kartika Wijayakusuma Vol 5 No 2 (2024): Jurnal Abdimas Kartika Wijayakusuma
Publisher : LPPM Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jakw.v5i2.491

Abstract

Kemampuan literasi sains merupakan salah satu aspek yang dapat memberikan pendekatan pembelajaran sains dalam menjawab fenomena alam sehari-hari serta membuat pembelajaran sains lebih mudah dipahami dan lebih menyenangkan. Budaya pembelajaran sains ini perlu terus berlanjut diterapkan terutama bagi siswa terdampak bencana untuk meningkatkan motivasi belajar SMPN 1 dan SMAN 1 Sumedang merupakan contoh sekolah terdampak bencana gempa bumi Sumedang yang dapat mengurangi trauma bencana dengan implementasi percobaan kimia sederhana. Percobaan ini bertujuan untuk meningkatkan motivasi belajar siswa di bidang sains melalui pendekatan yang praktis dan menyenangkan dalam menghilangkan trauma psikis yang dialami. Metode yang digunakan adalah pengenalan konsep sains dasar melalui beberapa demonstrasi kimia yang mudah dipahami. Beberapa percobaan kimia yang didemonstrasikan yaitu Pengujian Vitamin C, Larutan Ajaib, Balon Hidrogen, Lava Lamp, Elephant Toothpaste, Pesan Rahasia, dan Jam Iodin. Kegiatan pengabdian masyarakat ini berhasil meningkatkan kemampuan literasi dan motivasisiswa dalam belajar sains dilihat dari antusiasme dan hasil feedback yang diperoleh. Pengabdian masyarakat dalam bentuk implementasi percobaan kimia sederhana ini dapat menjadi solusi dan strategi efektif secara berkelanjutan untuk meningkatkan pembelajaran, kemampuan literasi sains, dan motivasi siswa setelah menghadapi bencana.
The Ce3+ Metal Ion Adsorbent Based on Calcium Alginate Loaded Fe3O4 (Ca-Alg/Fe3O4) Hulqi Mila Haili; Rusnadi; Silmi Nur'asni Yulianti
International Journal of Applied Research and Sustainable Sciences Vol. 1 No. 4 (2023): December 2023
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijarss.v1i4.1094

Abstract

Rare earth metal frequently utilized in technological advancements is cerium. The high utilization of cerium correlates with the depletion of primary REEs reserves and the accumulation of secondary materials that can enter aquatic environments. Recycling and recovery of REEs through methods such as solvent extraction, filtration, and adsorption are commonly employed. Adsorption is chosen due to the abundance of adsorbent materials in nature, simple fabrication, efficiency, and cost-effectiveness. Calcium alginate biosorbent loaded with magnetite (Ca-Alg/Fe3O4) has been used to adsorb (Ce3+)aq, with optimal conditions achieved at Ca-alginate:Fe3O4 ratio of 2:1 (w/w), 0.075 g, pH 4, a contact time of 210 minutes, and 250 ppm, [Ce3+]0. The adsorption process follows the Langmuir isotherm model with qmax at 50.505 mg/g. Hence, the Ca-Alg/Fe3O4 biosorbent shows potential in adsorbing (Ce3+)aq.
Co-Authors Amila Gadri Anak Agung Istri Sri Wiadnyani Andi Radhiatul Hilmah Alimin Arie Hardian Bachri Amran Dhiya Haniifa Putri Elva Stiawan Handajaya Rusli, Handajaya Hanifah, Sarina Hilda Aprilia, Hilda Hulqi Mila Haili Humairani Rahman M. Bachri Amran Muhammad Bachri Amran Muhammad Iqbal Muhammad Yudhistira Azis Rahayu, Rizky Sri Riesma Azhar Falahul Alam Riskia Chandra Widianti Safitri, Irin Sarina Hanifah Silmi Nur'asni Yulianti Sri Dewi Lestari, Sri Dewi Thoriq, Thoriq USWATUN HASANAH Wibisono, Eucharistein Gratia Yani Lukmayani