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All Journal SAINS TANAH - Journal of Soil Science and Agroclimatology Communications in Science and Technology Jurnal Kartika Kimia Journal of Fibers and Polymer Composites Jurnal Pengabdian Isola Jurnal Riset dan Praktik Pendidikan Kimia al Kimiya : Jurnal Ilmu Kimia dan Terapan
Nurhayati, Mita
Universitas Pendidikan Indonesia
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology Other

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EVALUATION OF MINERAL-BASED HYDROXYAPATITE/ZnO COMPOSITES AS PHOTOCATALISTS FOR METHYLEN BLUE DEGRADATION Hardian, Arie; Nafisah, Aulia Zakiyatun; Karya, Teguh; Halim, Riyan; Murniati, Anceu; Syarif, Dani Gustaman; Noviyanti, Atiek Rostika; Nurhayati, Mita; Jasmansyah, Jasmansyah; Reza, Muhammad
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 11 No. 2 (2024): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v11i2.37886

Abstract

The use of dyes in the textile industry has increased significantly, raising concerns about their potential to pollute the environment and harm human health. Methylene blue is a widely used synthetic dye, necessitating effective methods for its degradation. Photodegradation is a promising approach to decompose dyes into simpler, less harmful compounds. In this study, hydroxyapatite combined with ZnO was employed as a photocatalyst material to enhance photocatalytic performance. The research aims to degrade methylene blue using a Hydroxyapatite/ZnO (HAp/ZnO) nanocomposite through photodegradation. The optimization of the photodegradation process was investigated by varying irradiation time, methylene blue concentration, and pH. The optimum degradation of methylene blue was achieved using 20 mg of HAp/ZnO nanocomposite at an irradiation time of 120 minutes, an initial methylene blue concentration of 5 ppm, and pH 7. Adsorption isotherm modeling revealed that the process followed the Langmuir isotherm model, with a maximum adsorption capacity (qmax) of 0.3353 mg/g. The degradation followed pseudo-second-order kinetics with a reaction rate constant of 4.0026×105 L/mol·s.
Peat soil treatment using hydrogen peroxide and its adsorption towards potassium ion (K+) in aqueous solution Yuliani, Galuh; Karina, Suci; Nurhayati, Mita; Mutiara, Siska; Mollah, Mamun; Ganesan, Shangeetha
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 22, No 1 (2025): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v22i1.93520

Abstract

Peat soil contains functional groups such as carboxylic acid and hydroxyls that bind metal ions and organic compounds in solution. However, the adsorption capacity of natural peat soil is still considered low. Therefore, this study aims to alter the peat surface using a hydrogen peroxide solution and to utilize the resulting peat as an adsorbent for K+ ions in an aqueous solution. Peat soil was treated with a 10% hydrogen peroxide solution for 30 minutes. The infrared spectra of the treated peat indicated an increase in the intensity of hydroxyl groups (-OH) at 3400 cm-1 and a sharp increase in carboxylic groups (-COOH) at 1700 cm-1. SEM photos showed that the porosity of the treated peat was higher, probably due to oxidation reactions that resulted in new pores on the surface, and BET analysis confirmed the increase in surface area upon treatment. During the adsorption experiment, the residual concentrations of K+ ions were determined using AAS. The adsorption capacities of raw and treated peat were 37.40 mg g-1 and 59.53 mg g-1, respectively. When fitted using Langmuir and Freundlich adsorption isotherm models, the adsorption data plots followed the Freundlich isotherm model, indicating reversible adsorption on heterogeneous surfaces. The Density Functional Theory (DFT) calculation showed that the interaction energy between peat soil and K+ ions was lower after treatment, indicating that K+ ions bind to exchange sites on the treated peat soil.
Co-Authors Agus Setiabudi Anceu Murniati Annifah, Riri Uswatun Aprianto, Agil Arie Hardian Arrozi , Ubed Sonai Fahruddin Asep Kadarohman Asep Suryatna Ashfiya, Putri Sayyida Astuti, Wijayanti Dwi Atiek Rostika Noviyanti Aziz, Hafiz Aji Boon Seng Ooi Budiman Anwar Da, Oh Wen Dani Gustaman Syarif Dwi, Sadina Sahitya Eli Hendrik Sanjaya Fauzi, Rafi N. Fitri Khoerunnisa Ganesan, Shangeetha Gebi Dwiyanti Halim, Riyan Hendrawan Hendrawan Hendrawan Hendrawan Hera Herlina Iasha, Yurin Karunia Apsha Albaina Iasya, Yurin Karunia Apsha Albaina Ida Hamidah Ijang Rohman Irnanda, Istifhamy Jasmansyah, Jasmansyah Karina, Suci Karya, Teguh Khoiriah, Selmi F. Lathifah, Siti Maulani Maharani, Brigitta Stacia Mollah, Mamun Mr Sjaeful Anwar Muhammad Reza Murni Handayani Mutiara, Siska Nafisah, Aulia Zakiyatun putri kania, putri Putri, Restiani Alia Silvia Widiyanti Sri Mulyani Widiyanti, Silvia Yaya Sonjaya Yessi Permana Yuliani, Galuh