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All Journal Jurnal Pendidikan Kimia FKIP Universitas Halu Oleo Al-Kimia Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research Molluca Journal of Chemistry Education (MJoCE) Hydrogen: Jurnal Kependidikan Kimia Jurnal Biofiskim: Pendidikan dan Pembelajaran IPA JURNAL BAHARI PAPADAK HIRONO : Jurnal Pengabdian Masyarakat
La Harimu
Study Program Of Chemistry Education, Faculty Of Teacher Training And Education, Haluoleo University, Kampus Baru Anduonohu, Kendari, Sulawesi Tenggara, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Physics Social Sciences Veterinary

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Studi Variasi Konsentrasi NaOH dan H2SO4 Untuk Memurnikan Silika Dari Abu Sekam Padi Sebagai Adsorben Ion Logam Pb2+ dan Cu2+ Harimu, La; Rudi, La; Haetami, Aceng; Santoso, Giswa Ayu Pratiwi; ., Asriyanti
Indonesian Journal of Chemical Research Vol 6 No 2 (2019): Edisi Bulan Januari (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2019.6-lah

Abstract

A study of variations in the concentration of NaOH and H2SO4 to purify silica from rice husk ash and its application as adsorbent of Pb2+ and Cu2+ Metal Ions. The NaOH concentrations used were 8%, 9%, 10%, 11%, 12% and 13% and H2SO4 concentrations were 5.4%, 8.16%, 10.88%, and 13.61%. The process of adsorption of Pb2+ and Cu2+ metal ions was carried out at pH (3, 4, 5, 6) and silica masses. The results showed the silica yield obtained in the form of white powder. The highest silica content at 12% NaOH concentration of 41.81% with a purity of 89.09% and H2SO4 concentration is 10.88% at 65.39% with a purity of 94.94% initial content 86.02%. The results of surface structure characterization using Scanning Electron Microscope (SEM) average size of particle diameter was 0.030 µm. Optimal adsorption process of Pb2+ and Cu2+ metal ions using silica from rice husk occurred at pH 6 and the adsorbent mass was 0.3 gram, the adsorption efficiency was 98% and 86.25% respectively with adsorption capacity of 0.96 mg/g for metal Pb2+ and 0.83 mg/g for Cu2+ metals.
Perbandingan Kemampuan Aerasi Sembur (Spray) dengan Metode Adsorpsi Menggunakan Adsorben Serbuk Kulit Buah Kakao untuk Menurunkan Kadar Besi dan Mangan Pada Air Sumur Gali Harimu, La; Haetami, Aceng; Sari, Citra Purnama; Haeruddin, Haeruddin; Nurlansi, Nurlansi
Indonesian Journal of Chemical Research Vol 8 No 2 (2020): Edition for September
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2020.8-hrm

Abstract

Research on the use of the spray aeration method with adsorption of cocoa rind powder to reduce iron and manganese levels in dug well water has been carried out. This study aims to make comparisons from two methods to reduce iron and manganese in dug well water. The parameters optimized in this study are the aeration time and the variation of the addition of the adsorbent mass and the adsorption time. Based on the research results, the spray aeration time for 2 hours gave the optimal percentage reduction for Fe3+ and Mn4+ metal ions, namely 98.68% and 94.22%. Meanwhile, for adsorption using cocoa pod husk powder, the optimal reduction occurred in the adsorbent mass of 0.2 grams and the adsorption time of 60 minutes for iron and manganese 96.36% and 95.15%, respectively.
The Analysis of the Ability NaOH Activated Rice Husk Ash Silica to Reduce Cl Ion Levels Febryzha, Nurul Widya; Harimu, La; Mulyana, Wa Ode; Mandasari, Ekacahyana
Indonesian Journal of Chemical Research Vol 12 No 3 (2025): Edition for January 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.12-feb

Abstract

Research has been carried out to analyze the ability of NaOH-activated rice husk Ash Silica to reduce Cl Ion Levels. This study aimed to determine the optimum mass, optimum pH, optimum contact time and apply NaOH-activated rice husk ash silica to reduce Cl ion levels in seawater. The method used in this study was an experimental method with the parameters studied, namely optimum mass, optimum pH, optimum contact time, and the ability of NaOH-activated rice husk ash silica to reduce Cl ion levels in seawater. The results showed that the optimum adsorbed percentage of Cl ions occurred at an optimum mass of 0.025 gram, optimum pH of 7, and optimum contact time of 30 minutes with an adsorbed percentage of 45.7% and an adsorption capacity of 9.14 mg/g. The Cl ion content of seawater samples that can be reduced using NaOH-activated rice husk ash silica is 16.925 ppm with an adsorbed percentage of 33.85%, so it can be concluded that NaOH-activated rice husk ash silica can be used to reduce Cl ion levels.
IDENTIFIKASI KANDUNGAN SENYAWA KIMIA BAMBU LAUT DARI PERAIRAN WANGI-WANGI SELATAN WAKATOBI Ferlin, Akhmatul; Asuhadi, Sunarwan; Harimu, La
Jurnal Bahari Papadak Vol 4 No 1 (2023): Jurnal Bahari Papadak
Publisher : Universitas Nusa Cendana

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Abstract

Abstrak - Tujuan utama penelitian ini adalah dalam rangka mengidentifikasi kandungan senyawa kimia bambu laut. Sampel bambu laut (Isis hippuris) diambil dari perairan Sousu Desa Matahora. Ekstrak bambu laut diuji secara fitokimia dan kromatografis di Unit Laboratorium Jurusan Pendidikan Kimia FKIP Universitas Halu Oleo. Hasil uji fotokimia dan HPLC tersebut, disimpulkan bahwa bambu laut mengandung senyawa sekunder dari golongan Alkaloid, Saponin, Triterpenoid, Steroid, Polifenol, dan Tannin. Hasil analisis terhadap kandungan senyawa kimia bambu laut, disarankan pentingnya upaya restorasi spesies yang dimaksud, serta pemanfaatannya dilakukan melalui nilai metabolit sekundernya. Kata Kunci : Isis hippuris, Metabolit sekunder, Fitokimia Abstract - The main purpose of this research is to identify the chemical compounds of sea bamboo. Samples of sea bamboo (Isis hippuris) were taken from the waters of Sousu, Matahora Village. Sea bamboo extract was tested phytochemically and chromatographically in the Laboratory Unit of the Department of Chemistry Education FKIP Halu Oleo University. The results of testing the photochemical and HPLC it, concluded that the bamboo sea containing compound secondary from the group alkaloids, saponins, Triterpenoid, Steroids, Polyphenols, and Tannin. The results of the analysis of sea bamboo’s chemical compounds, it is suggested the importance of efforts to restore this species, and its utilization through the value of its secondary metabolites. Keywords : Isis hippuris, Secondary metabolite, phytochemical
ADSORPSI KALSIUM AIR PAYAU SEBAGAI SUMBER AIR BERSIH BAGI MASYARAKAT PESISIR DENGAN SILIKA TERMODIFIKASI DARI ABU SEKAM PADI Kahar, Kaharuddin; Edihar, Muh; Harimu, La; Dahlan; Mutmainnah
Al-Kimia Vol 13 No 1 (2025): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

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Abstract

Many Indonesian residents have difficulty obtaining clean water, especially people who live in coastal areas. Those who live there can only consume brackish water which is considered to have side effects on health due to the excessive calcium content. This research offers a simple method, namely adsorption using abundant raw materials, namely rice husk ash from agricultural waste resulting from burning rice husks. Using husks directly has less effectiveness, so it needs to go through additional processes such as removing impurities and modifying the structure. This research aims to reduce calcium levels in brackish water using silica that has been modified from rice husk ash. The process of making adsorbents is carried out by sieving, heating, filtering, washing to obtain silica, then modifying and optimizing important parameters until its application to brackish water. The difference between pre-modified and modified silica can be seen in the characterization with FTRI at wave numbers from 470 cm-1 to 430 cm-1 1, namely deeper bending vibrations, which are also clarified by the surface condition with more structured pores seen in the SEM results. The modified silica works optimally at a mass of 0.4 grams, pH 7.5, contact time of 40 minutes and concentration of 50 ppm. It has an adsorption capacity of 3.2 mg/g and follows the Langmuir isotherm pattern.
Analysis of the Desorption Capacity of Pb2+ and Cu2+ Metals on Silica and Silica-Chitosan Adsorbents Puspitasari, Faizul; Harimu, La; Mulyana, Wa Ode
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 4 (2025): August 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i4.16781

Abstract

Studies have been conducted on the analysis of the desorption ability of Pb(II) and Cu(II) metals from silica and silica-chitosan adsorbents. This study aims to determine the desorption ability of Pb2+ and Cu2+ metals with variations in HCl concentrations using silica adsorbents and to determine the desorption ability of Pb2+ and Cu2+ metals with variations in HCl concentrations using silica-chitosan adsorbents. The parameters optimized in this study were concentration variations, namely 0.005 M, 0.01 M, and 0.02 M. The results of the study showed that silica adsorbents, Pb(II) metal desorption was best obtained at an HCl concentration of 0.02 M, which was 10.11%. Meanwhile, in silica adsorbents for Cu(II) metals, the best desorption was also obtained at an HCl concentration of 0.02 M, which is 0.0753%. In the silica-chitosan adsorbent, the best Pb(II) metal desorption was obtained at an HCl concentration of 0.01 M, which is 0.0298%, while the best desorption of Cu(II) metal was obtained at an HCl concentration of 0.01 M, which was 12.0684%
PELATIHAN PEMBUATAN KERIPIK SAYUR DI KECAMATAN WANGI-WANGI SELATAN KABUPATEN WAKATOBI, PROVINSI SULAWESI TENGGARA Rejeki, Sri; Harimu, La; L, Mariani
HIRONO : Jurnal Pengabdian Masyarakat Vol 3 No 1 (2023): 2023 April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Hein Namotemo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55984/hirono.v3i1.131

Abstract

Wangi-wangi Selatan is one of the areas in Wakatobi Regency which is rich in vegetables, especially kale, spinach, eggplant and bitter melon. However, it is only processed as a vegetable by direct cooking so it has a short shelf life. For this reason, training on making chips is carried out so that vegetables can be consumed for a long time and can also have economic value for the community, especially in Wangi Wangi Selatan sub-district. This training lasted for 7 days with a series of activities consisting of (a) counseling which was carried out for 2 days; (b) 4 days of training and (c) 1 day of activity evaluation. The results of this training are a) the utilization of local vegetables which can be processed into chips thereby increasing the community's economy; b) increasing community knowledge and skills on how to process vegetables into chips so as to extend and improve the family economy. The results of the evaluation of this training showed that the participants were very satisfied with the training on making vegetable chips and hoped to continue with different topics.
Co-Authors ., Asriyanti Aceng Haetami, Aceng Akhmatul Ferlin Asuhadi, Sunarwan Azmi, Muh Ulul Dahlan Dian Hardianti, Dian Dwi Siswanta Dwi Siswanta Fachry Abda El Rahman Febryzha, Nurul Widya Haeruddin Haeruddin Hasria Hasria, Hasria Intan, Putri Jamili Jamili Jaya, Muhammad Imin kahar, kaharuddin L, Mariani La Rudi Mandasari, Ekacahyana Martianingsih, Nuning Muh. Edihar Mulyana, Wa Ode Nurlansi, Nurlansi Puspitasari, Faizul Rahmanpiu, Rahmanpiu Ramadhan, L.O.A.N. Ratna Ratna Ruslin, Ruslin Sabirin Matsjeh Santoso, Giswa Ayu Pratiwi Sari, Citra Purnama Sarimu, La Sri Juari Santosa Sri Juari Santosa Sri Rejeki Wildana, Putri