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All Journal Journal of Natural Sciences and Mathematics Research Social, Humanities, and Educational Studies (SHEs): Conference Series
Qulub, Tatmainnul
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Social Sciences

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Isolation and characterization of Humic Acid from organic waste as an adsorbent for Rhodamine B Qulub, Tatmainnul; Haniyyah AM, Nadaa; Kustomo, Kustomo; Misrochah, Nana
Journal of Natural Sciences and Mathematics Research Vol. 10 No. 2 (2024): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

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

Abstract

Humic acid compounds are organic materials distributed across various terrestrial and aquatic ecosystems, playing a crucial role in environmental pollutant absorption. This study aims to isolate and characterize humic acid from organic waste as an adsorbent for rhodamine B. The isolation process of humic acid was conducted using the extraction method with 0.5 N NaOH solution followed by acidification using 3 M HCl solution. Characterization was carried out using a UV-Vis spectrophotometer and Fourier Transform Infrared (FTIR) spectrophotometer. The UV-Vis characterization results showed that the maximum wavelength of humic acid is 286 nm. FTIR analysis of humic acid indicates the presence of functional groups such as hydroxyl, carboxylate, and aromatic groups, consistent with the typical characteristics of humic acid. The adsorption kinetics was determined by interacting rhodamine B with humic acid after determining the optimal pH of 4, optimal time of 30 minutes, and optimal concentration of 20 ppm. The research results indicate that the adsorption kinetics of rhodamine B on humic acid follows pseudo-second-order kinetics with a reaction rate of 0.0566 min?¹ and follows the Freundlich adsorption isotherm.
Isolation and characterization of Humic Acid from organic waste as an adsorbent for Rhodamine B Qulub, Tatmainnul; Haniyyah AM, Nadaa; Kustomo, Kustomo; Misrochah, Nana
Journal of Natural Sciences and Mathematics Research Vol. 10 No. 2 (2024): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.v10i2.20778

Abstract

Humic acid compounds are organic materials distributed across various terrestrial and aquatic ecosystems, playing a crucial role in environmental pollutant absorption. This study aims to isolate and characterize humic acid from organic waste as an adsorbent for rhodamine B. The isolation process of humic acid was conducted using the extraction method with 0.5 N NaOH solution followed by acidification using 3 M HCl solution. Characterization was carried out using a UV-Vis spectrophotometer and Fourier Transform Infrared (FTIR) spectrophotometer. The UV-Vis characterization results showed that the maximum wavelength of humic acid is 286 nm. FTIR analysis of humic acid indicates the presence of functional groups such as hydroxyl, carboxylate, and aromatic groups, consistent with the typical characteristics of humic acid. The adsorption kinetics was determined by interacting rhodamine B with humic acid after determining the optimal pH of 4, optimal time of 30 minutes, and optimal concentration of 20 ppm. The research results indicate that the adsorption kinetics of rhodamine B on humic acid follows pseudo-second-order kinetics with a reaction rate of 0.0566 min?¹ and follows the Freundlich adsorption isotherm.
Development of Green Chemistry Integrated Environmental Chemistry Practical Instructions Qulub, Tatmainnul; Misrochah, Nana; Rahmatulloh, Reza
Social, Humanities, and Educational Studies (SHES): Conference Series Vol 6, No 4 (2023): Social, Humanities, and Educational Studies (SHEs): Conference Series
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/shes.v6i4.81253

Abstract

Permasalahan lingkungan menjadi persoalan yang serius. Sebagai upaya yang dapat dilakukan untuk meminimalisi pencemaran lingkungan dalam bidang Pendidikan adalah melalui kegiatan praktikum. Tujuan dari penelitian ini adalah mengembangkan petunjuk praktikum kimia lingkungan yang berintegrasi dengan prinsip green chemistry. Metode pengembangan yang digunakan untuk mencapai tujuan tersebut adalah melalui pendekatan ADDIE (Analysis, Design, Development, Implementation, Evaluation). Dengan menganalisis kegiatan laboratorium, isi materi, dan kemampuan awal siswa, studi mengungkapkan pemahaman siswa terhadap green chemistry yang rendah. Integrasi prinsip-prinsip green chemistry dalam judul praktikum melibatkan tahapan analisis, desain, pengembangan, implementasi, dan evaluasi. Petunjuk praktikum dikembangkan secara cermat, termasuk bagian awal dan inti yang merinci setiap aspek praktikum. Setelah direvisi berdasarkan feedback dosen, uji validitas dilakukan dengan empat pakar, yang memberikan penilaian sebesar 4,7 dengan kategori sangat baik. Proses ini mempersiapkan implementasi praktikum kimia lingkungan berbasis green chemistry di lingkungan pembelajaran.     
Co-Authors Haniyyah AM, Nadaa Kustomo, Kustomo Misrochah, Nana Rahmatulloh, Reza