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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 Hanifiya: Jurnal Studi Agama-Agama Jurnal Abdimas Kartika Wijayakusuma Journal of Tropical Biodiversity Jurnal Educative: Journal of Educational Studies Jurnal Farmasi Klinik dan Sains International Journal of Applied Research and Sustainable Sciences (IJARSS) Serambi Engineering
Rusnadi Rusnadi
Institut Teknologi Bandung
Religion Agriculture, Biological Sciences & Forestry 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 Languange, Linguistic, Communication & Media 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

Kadmium banyak digunakan dalam bidang penyepuhan logam, baterai, plastik, serta industri cat. Logam ini bersifat toksik bagi manusia dengan dampak buruk terhadap ginjal dan rangka. Adsorpsi telah diketahui sebagai salah satu metode yang mudah, efektif, dan murah untuk proses penghilangan ion logam dalam limbah cair. Pada penelitian telah dibuat bulir kalsium alginat-PVA sebagai adsorben ion Cd(II). Karakterisasi adsorben dilakukan dengan menggunakan Fourier Transform Infrared Spectroscopy (FTIR) dan Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS). Penentuan kondisi optimum adsorpsi meliputi komposisi adsorben, pH, waktu kontak, dan massa adsorben. Hasil penelitian menunjukan bahwa kondisi optimum adsorpsi pada pH 4, waktu kontak 4 jam, dan massa adsorben 0,2 gram menggunakan sistem batch. Proses adsorpsi ion Cd(II) mengikuti model isoterm Langmuir dan model kinetika orde dua semu.
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

Carbohydrate protein, fat, and minerals are the main ingredients of seaweed besides water. These main contents can vary depending on environmental conditions and the type of seaweed. Gracilaria sp, Sargassum sp, and Ulva lactuca grow widely and have been used on Sayang Heulang beach, South Garut, West Java, Indonesia. Unfortunately, no information was found for its main content that can indicate the seaweed quality. This research aims to conduct a proximate analysis of the three seaweeds, representing brown seaweed, red seaweed, and green seaweed, respectively. Carbohydrate total analysis was done using Luff Schoorl method and gave 11.2 %w/w, 25.3 %w/w, and 20.4 %w/w for Gracilaria sp, Sargassum sp, and U. lactuca, respectively. Determination of total protein using the Kjeldahl-Nessler method gives 6.5 %w/w for Gracilaria sp, 7.8 %w/w for Sargassum sp, and 8.7 %w/w for U. lactuca. The methods for fat analysis are Soxhlet extraction, which gives 0.3 %w/w for Gracilaria sp, 1.6 %w/w for Sargassum sp, and 1.1 %w/w for U.lactuca. The study also showed Gracilaria sp, Sargassum sp, and U. lactuca contain 26.9 %w/w, 23.6 %w/w, and 32.5 %w/w mineral content, respectively. These results indicate that different types of seaweed provide different chemical compositions.
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.
Adsorption of Pb(II) Ions Using Residual Extract of Alginate from Sargassum sp. Rusnadi; Wibisono, Eucharistein Gratia; Dhiya Haniifa Putri; Andi Radhiatul Hilmah Alimin
Jurnal Serambi Engineering Vol. 10 No. 1 (2025): Januari 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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

Abstract

Lead ion is one of the environment’s main pollutants. Lead ions have carcinogenic and toxic effects and, therefore dangerous to the human body.  This research was conducted to determine the ability of alginate extraction residue from Sargassum sp.’s ability as lead ion adsorbent. The characterization of this adsorbent was done using FTIR (Fourier Transform Infrared) and SEM-EDS (Scanning Electron Microscopy-Energy Dispersive Spectroscopy). The optimization of this adsorbent was carried out toward some parameters, such as pH, adsorbent’s mass, Pb(II)’s initial concentration, and contact time. The result showed that the optimum condition can be reached if the contact between the adsorbent and adsorbate was done using 0,025 grams of adsorbent in 25 ml of pH 5 Pb(II) (200 ppm) solution, using 5 minutes contact time.  The adsorption process follows the Langmuir isotherm model with a maximum capacity of 416,6667 mg.g-1. The result of the kinetics study showed that the adsorption follows a pseudo-second-order kinetics whilst the thermodynamics study showed that the adsorption process is exothermic with the value of ΔHᵒ = -4,51 kJ.mol-1,  and the value of ΔSᵒ = -0,038  kJ.mol-1.K-1.
Co-Authors Amila Gadri Anak Agung Istri Sri Wiadnyani Andi Radhiatul Hilmah Alimin Arie Hardian Bachri Amran Dhiya Haniifa Putri Elva Stiawan Firasadi Nursub’i Gusti Wicaksono Haili, Hulqi Mila Handajaya Rusli, Handajaya Hanifah, Sarina Hilda Aprilia, Hilda Humairani Rahman Juliarta Bramansa Ottay M. Bachri Amran Muhammad Bachri Amran Muhammad Iqbal Muhammad Iqbal Muhammad Yudhistira Azis Nurhani Aryana, Nurhani Persada Agussetia Sitepu Prihadi, Az Zahra Utami R, Riinawati Rahayu, Rizky Sri Riesma Azhar Falahul Alam Riskia Chandra Widianti Risky Ananda Kurniawan Safitri, Irin Sri Dewi Lestari, Sri Dewi Sri Wahyuni Theresia, Claresta Hara Thoriq, Thoriq Tomi Ariyanto Triadhi, Untung USWATUN HASANAH Utin Riesna Afrianti Wibisono, Eucharistein Gratia Yani Lukmayani Yulianti, Silmi Nur'asni