Article Per Year (5 Year)
p-Index From 2020 - 2025
1.048
P-Index
This Author published in this journals
All Journal Journal of Degraded and Mining Lands Management agriTECH Chimica et Natura Acta IJEMS (Indonesian Journal of Environmental Management and Sustainability) Journal of Pharmaceuticals and Natural Sciences Journal of Tropical Pharmacy and Chemistry
La Ode Ahmad Nur Ramadhan
Department of Chemistry, Halu Oleo University, Jl. Kampus Hijau Bumi Tridharma, Anduonou, Kendari 93132, Southeast Sulawesi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Decision Sciences, Operations Research & Management Energy Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Public Health

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
Water holding capacity, aggregation, respiration, and chemical character of acid soil amended rice straw biochar enriched with different volumes of liquid extract (sap) of Kappapychus alvarezii Rembon, Fransiscus Suramas; Kilowasid, Laode Muhammad Harjoni; Afa, La Ode; Rakian, Tresjia Corina; Parapa, Imelia; Laksana, Mohammad Alfi Nanda; Sabaruddin, Laode; Ansi, Azhar; Ramadhan, La Ode Ahmad Nur; Dahlan; Zulfikar
Journal of Degraded and Mining Lands Management Vol. 12 No. 1 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.121.6949

Abstract

The quality of acidic soil is determined by organic C content produced from rice straw biochar in agriculture. In this context, liquid extract from Kappapychus alvarezii (K-sap) is used as a biochar enrichment agent. Therefore, this research aimed to (i) analyze the character of K-sap enriched rice straw biochar with different volumes, as well as (ii) evaluate the impact on soil water holding capacity, size class distribution, aggregate stability index, respiration rate, and acidic soil chemical characters. The treatment tested was the volume of K-sap kg-1 biochar, namely (i) without biochar, (ii) 0 mL, (iii) 500 mL, (iv) 1,000 mL, and (v) 1,500 mL. Each treatment was repeated three times and placed according to a randomized block design procedure. The area covered by K-sap, pore size, and amorphous degree increased while the pore volume of the biochar surface decreased. The addition of 1,000 mL of K-sap kg-1 biochar released a new peak number associated with the aliphatic and aromatic groups. The K-sap enriched biochar increased the proportion of soil aggregate size of 1-2 mm, water holding capacity, carbon storage, pH, total N, available P and K, exchangeable base cations as well as base saturation. Meanwhile, the concentration of Al3+ and H+ were decreased in the acidic soil solution. The results showed that the performance of rice straw biochar, K-sap volumes, soil chemical quality, water holding capacity, and ability to store carbon of the acidic soil was improved by adding K-sap volume.
Plasmonic Sensor Nata de Coco Film Inserted with Copper Nanoparticles for Detection of Mercury by UV-Vis Spectrophotometry Watoni, Abdul Haris Haris; Rijal, Rijal; Ramadhan, La Ode Ahmad Nur; Kadir, La Ode Abdul
Chimica et Natura Acta Vol 13, No 1 (2025)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v13.n1.54839

Abstract

The rapid development of the mining industry has resulted in an increasing amount of toxic waste materials in the environment, including mercury (Hg). A reliable chemical sensor is needed to detect the presence of mercury. One of the chemical sensors that is starting to be widely developed is plasmonic film. This research aims to determine the characteristics and validity of plasmonic nata de coco-copper nanoparticle (CuNPs) films for cuvette type sensor chips in the rapid detection of Hg metal using UV-Vis spectrophotometry. This research began with the preparation of a bioreductor from red dragon fruit peel extract, green synthesis of CuNPs, synthesis of nata de coco, and synthesis of nata de coco-cellulose plasmonic film inserted with CuNPs-red dragon fruit peel extract. The next stage is the validation and application of plasmonic films for Hg metal detection using UV-Vis spectrophotometry. The success of this research was proven through characterization using an Ultra Violet-Visible (UV-Vis) spectrophotometer, a Fourier Transform Infra Red (FTIR) spectrophotometer, and a digital optical microscope. UV-Vis spectrophotometric analysis showed the formation of stable CuNPs with a diameter of 46 nm - 92 nm. FTIR analysis shows changes in functional groups in the red dragon fruit peel extract compound, nata de coco cellulose, and the formation of Cu-O bonds as an indication that the process of reducing Cu2+ ions to Cu0 has occurred and the insertion of CuNPs-red dragon fruit peel extract in the nata de coco cellulose film matrix. Analysis using an optical microscope shows the morphology of CuNPs with a uniform round shape. Measurement of the Hg standard solution using UV-Vis spectrophotometry in a cuvette inserted with a plasmonic film has good accuracy and precision with %R = 103.9% and %RSD = 0.9%, with LOD and LOQ values of 0.193 ppm and 0.245 ppm, respectively. The use of plasmonic film in determining Hg using UV-Vis spectrophotometry was proven more sensitive than without plasmonic film with a sensitivity value of 1.50. These results indicate that the pasmonic film from nata de coco-CuNPs has the potential to be applied as a cuvette type sensor chip for Hg metal detection.
Evaluating the Quality Status and Sustainability of Anggoeya Spring in the Ecological Dimension using the Rapid Appraisal for Springs Method Kahirun; Ramadhan, La Ode Ahmad Nur; Erif, La Ode Muhammad; Mubarokah, Umi
Indonesian Journal of Environmental Management and Sustainability Vol. 9 No. 2 (2025): June
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2025.9.2.56-67

Abstract

Water quality is essential for community needs. This study uses physical, chemical, and biological parameters to evaluate the quality and sustainability of Anggoeya Spring, Kendari City. The Southeast Sulawesi Health Laboratory tests assessed compliance with water quality standards, while pollution levels were analyzed using the Pollution Index. Sustainability was examined through the RAP-SPRINGS method, focusing on ecological aspects. Results showed compliance with most standards, except for BOD, COD, and total coliform levels. Anggoeya Spring was classified as lightly polluted but ecologically sustainable. Key sensitive attributes land cover in the catchment area, land cover within a 200 m radius, catchment area criticality, and water source utilization-highlight the need for targeted conservation and rehabilitation efforts. Therefore, prioritizing land and forest management in the catchment area and surrounding zones is crucial for sustaining Anggoeya Spring. This includes the need for improved raw water treatment, especially water treatment technology, due to the high total coliform content in Anggoeya spring water. This study evaluates water quality, determines pollution levels, and analyzes sustainability using the RAP-SPRINGS method. It emphasizes crucial ecological factors for conservation, advocates land rehabilitation, and highlights the necessity of improved water treatment. Ultimately, it contributes to environmental preservation and sustainable water management.
Green Preparation of Cu Nanoparticles with Bioreductor of Red Dragon Fruit Peel Extract: Visible Spectroscopy Properties Ramadhan, La Ode Ahmad Nur; Fanihu, Siti Linda Cahayani; Watoni, Abdul Haris; Rijal, Rijal; Santoso, Nur Sofa Camelia; Rafiqa, Wa Ode Nasyarah; Haruna, Cindy Agriningsih; Arifin, Zainal Syam
Journal of Tropical Pharmacy and Chemistry Vol. 8 No. 1 (2024): J. Trop. Pharm. Chem.
Publisher : Faculty of Pharmacy, Universitas Mulawarman, Samarinda, Indonesia, 75117, Gedung Administrasi Fakultas Farmasi Jl. Penajam, Kampus UNMUL Gunung Kelua, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25026/jtpc.v8i1.633

Abstract

Copper nanoparticles have been successfully synthesized using the green synthesis method by utilizing red dragon fruit peel extract as a bioreductor. Red dragon fruit peel contains secondary metabolites that can reduce Cu2+ ions to Cu0. Physically, the formation of copper nanoparticles is indicated by a color change from light blue to green. In addition, the success of copper nanoparticles of red dragon fruit peel extract can be analyzed using a Visible and Fourier Transform Infrared (FTIR) spectrophotometer. The measurements using a Visible spectrophotometer showed the formation of copper nanoparticles at absorption peaks in the wavelength range of 400-450 nm. The stability of copper nanoparticles can be determined through the SPR peak absorption for 30 minutes, which shows that copper nanoparticles have good stability and have an estimated particle range of 46.43-92.93 nm, with a band gap value of 2.45 eV. The results of the FTIR spectrum on copper nanoparticles-red dragon fruit peel extract show a shift in the absorption peak of the wave number 3412.07 cm-1 to a wave number of 3439.07 cm-1 indicating a reduction of Cu2+to Cu0.
Characteristics of Biocellulose-Based Edible Film from Sago Wastewater (Metroxylon sago ROTTB.) on Various Glycerol Concentration Yanti, Nur Arfa; Ahmad, Sitti Wirdhana; Ramadhan, La Ode Ahmad Nur; Ardiansyah, Ardiansyah; Indrawati, Indrawati
agriTECH Vol 44, No 1 (2024)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.75154

Abstract

This study aimed to investigate the the characteristics of biocellulose-based edible films from sago wastewater (Metroxylon sago ROTTB.) by incorporating varying concentrations of glycerol as a plasticizer. The edible films were made through a casting method using biocellulose from sago wastewater as the main ingredient. The treatments included the addition of varying glycerol concentrations to the edible films, namely 0.5, 1, and 1.5% (v/v), with three replications. The observed characteristics included physical (thickness, solubility, and moisture content of the film), mechanical (tensile strength, elongation percentage, and Young’s modulus/modulus of elasticity) with a universal testing machine, chemical structure using FT-IR, and surface morphological characteristics through scanning electron microscopy (SEM). The results showed that increasing the glycerol concentration in the edible films improved the physical characteristics including thickness, solubility, and moisture. However, there was a decrease in the mechanical characteristics, namely tensile strength, elongation percentage, and Young’s modulus of the film. The main components of edible films found were cellulose polymers, as indicated by characteristic functional groups, such as free-OH groups, aliphatic C-H, C-O, and β-1,4-glycosidic bonds. The surface morphology of the biocellulose edible film without glycerol was smoother compared to those containing glycerol. Biocellulose-based edible films from sago wastewater with glycerol concentrations of 0.5% and 1% showed physical-mechanical characteristics that fulfilled the Japanese Industrial Standard (JSI), indicating the potential for application as food packaging. These results indicated that incorporation of glycerol has an effect on the characteristics of the biocellulose-based edible films from sago wastewater.
Synthesis and Characterization of Cellulose Nata de Coco Inserted Nanoparticles Zn-Moringa Leaf Extract (Moringa oleifera) as Biodegradable plastic Banan Fruit Packaging Ramadan; Ramadhan, La Ode Ahmad Nur; Zainal Syam Arifin
Journal of Pharmaceuticals and Natural Sciences Vol. 1 No. 3 (2024): J. Pharm. Nat. Sci.
Publisher : B-CRETA Publisher (CV. Borneo Citra Kreatama)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70392/jpns.v1i3.118135

Abstract

Synthesis and characterization of cellulose nata de coco inserted nanoparticles of zinc-moringa leaf extract as biodegradable plastic for banana fruit packaging has been carried out. This study aims to determine the characteristics, biodegradability and preservation activity of biodegradable plastic cellulose nata de coco inserted zinc nanoparticles-moringa leaf extract. The research process was carried out through the nata de coco synthesis stage, zinc nanoparticle synthesis-moringa leaf extract and the manufacture of biodegradable plastics. The success of this synthesis is evidenced by being characterized using a UV-Vis spectrophotometer, FTIR spectrophotometer and digital optical microscope. The results of UV-Vis spectrophotometer analysis showed that the zinc nanoparticles formed had an estimated particle size of 85.72-92.92 nm and were stable. The results of FTIR analysis on Moringa leaf extract showed the presence of -OH, C-H, C=O, C=C and C-O groups. In the biodegradable plastic film nata de coco-NPZn-moringa leaf extract, there was a peak shift in several functional groups marked at the peaks of wavenumbers 555.50 and 432.05 cm-1 which are ZnZP groups. Characterization using a digital optical microscope showed that zinc nanoparticlesThe synthesis is spherical, non-uniform, and has been well distributed on the cellulose surface of nata de coco. Biodegradation test on nata de coco-NPZn-Moringa leaf extract biodegradable plastic film using activated sludge system, test results show biodegradable plastic can be degraded 100% for 15 days. Preservation activities show that packaged bananas are still able to survive up to 8 days of post-harvest storage period. These results show the effectiveness of biodegradable plastic preservation of nata de coco-NPZn-moringa leaf extract biodegradable plastic which is quite good.
Co-Authors Abdul Haris Watoni Ahmad, Sitti Wirdhana ARDIANSYAH ARDIANSYAH Arifin, Zainal Syam AZHAR ANSI, AZHAR Dahlan Fanihu, Siti Linda Cahayani Fransiscus S. Rembon Haruna, Cindy Agriningsih Indrawati Indrawati Kadir, La Ode Abdul Kahirun, Kahirun La Ode Muhammad Erif Laksana, Mohammad Alfi Nanda Laode Muhammad Harjoni Kilowasid Laode Sabaruddin Mubarokah, Umi Nur Arfa Yanti Parapa, Imelia Rafiqa, Wa Ode Nasyarah Ramadan Rijal, Rijal Santoso, Nur Sofa Camelia TRESJIA CORINA RAKIAN, TRESJIA CORINA Watoni, Abdul Haris Haris Zainal Syam Arifin Zulfikar