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All Journal Journal of Tropical Soils JTSL (Jurnal Tanah dan Sumberdaya Lahan) Jurnal Tanah dan Air Forum Geografi Agrin : Jurnal Penelitian Pertanian Jurnal Tanah dan Air (Soil and Water Journal)
Djoko Mulyanto
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Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences Environmental Science Physics

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Characterization of Functional Groups in Sengon Biochar Under Various Pyrolysis Temperatures: Karakterisasi Gugus-Gugus Fungsional Biochar Sengon pada Perlakuan Berbagai Suhu Pirolisis NADA SALSABILA PRADHANI; DJOKO MULYANTO
Jurnal Ilmu Tanah dan Air Vol 22 No 1 (2025): June 2025
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jta.v22i1.15260

Abstract

The decline in soil quality due to pollution and the depletion of nutrients can be addressed by using biochar as a soil conditioner. This study utilized sengon biochar pyrolyzed at temperatures of 300°C, 500°C, and 700°C to analyze differences in functional group characteristics and their ability to adsorb ions. The objective of this study was to identify the functional groups of biochar at various pyrolysis temperatures and to determine the optimal temperature for enhancing the soil's ion adsorption capacity. The methods employed included functional group characterization using FTIR and ion adsorption testing using gentian violet and eosin red dyes. The results showed that biochar at 300°C retained dominant hydroxyl (-OH) and carbonyl (C=O) functional groups. Biochar at 500°C exhibited increased aromatic structure with dominant aromatic C=C groups while still retaining hydroxyl groups. Biochar at a pyrolysis temperature of 700°C loses many functional groups and is dominated by aromatic carbon. The best ion adsorption capacity is found in biochar at 500°C, followed by biochar at 700°C, and finally biochar at 300°C. Keywords: Analysis, organic materials, adsorption, ion. Keywords: Analysis, Organic Matter, Adsorption, Ion
STUDI KETIDAK SELARASAN ANTARA TANAH DAN BATUAN KARBONAT YANG MEMBAWAHINYA PADA JALUR BARON – WONOSARI GUNUNGKIDUL Mulyanto, Djoko
Agrin Vol 12, No 2 (2008): Agrin
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (221.839 KB) | DOI: 10.20884/1.agrin.2008.12.2.89

Abstract

Tujuan penelitian adalah mengaji ketidakselarasan antara tanah dan batuan karbonat yangmembawahinya. Analisis baik tanah maupun batuan karbonat meliputi komposisi mineral dan kimia. Komposisimineral fraksi pasir tanah di atas batugamping dirajai oleh labradorit sedangkan fraksi lempungnya oleh haloisitdan kaolinit. Kristobalit juga dijumpai terutama pada tanah-tanah di lingkungan karst. Berdasarkan macammineral tersebut diduga bahan induk tanah banyak dipengaruhi oleh bahan volkanik. Komposisi batugampingdirajai kalsit dan kuarsa. Terdapat perbedaan yang tegas antara komposisis mineral tanah dan batugamping,nisbah Fe tanah dan batugamping sangat rendah, adanya lithic contact yang sangat tegas. Terdapat mintakatpelapukan napal yang membawahi tanah, nisbah Fe tanah/ napal jauh lebih tinggi dibanding terhadapbatugamping, kadar CaCO3 napal rendah, dan baik tanah mapun napal mengandung smektit sehingga dikatakanbahwa napal bersifat mewariskan pada tanah yang terbentuk. Labradorit juga melimpah pada tanah di atas napal.Berdasarkan faktor-faktor tersebut maka disimpulkan bahwa ada ketidakselarasan antara tanah dan batugampingyang membawahinya kecuali pada napal. Bahan volkanik sangat berpengaruh sebagai bahan induk tanah.Kata kunci: batuan karbonat, bahan volkanik, batugamping, tanah, ketidakselarasan ABSTRACTThe aim of research was to study of the unconformity of soil–carbonate rock underlying relationship.Analysis both soil and carbonate rock cover minerals and chemical composition. Sand fraction mineralcomposition of soil overlying limestone dominated by labradorite whereas clay fraction by halloysite andkaolinite. Chrystobalite also was found especially on soils of karst area. Based of those minerals, soil parentmaterial predicted much be influenced by volcanic material. Limestone mineral composition dominated bycalcite and quartz. There are distict differences of carbonate mineral composition and soils, ratio Fe of soil/limestone is very low, and there is a sharply lithic contact of soil and limestone underlying. Soils overlying marlshow paralithic contact, there is a zone of marl weathering, and ratio Fe of soil to marl is higher than ratio Fe ofsoil to limestone, and CaCO3 concentration lower than limestone. Both soils and marl underlying containsmectite. Based factors above be said that marl have inheritate characteristic. Sand fraction minerals of soiloverlying marl are also dominated by labradorite. Based on boundary of soil and rock material underlying andkind of minerals concluded that there are unconformity between soils and limestone underlying, but relationshipbetween soils and marl underlying are conformity. Soils underlying carbonate material much be influenced byvolcanic material.Key words: carbonate, volcanic materials, limestone, soil, unconformity
Co-Authors Agung Kurniawan Ali Munawar Bekti Astuti Binardi Binardi Faezatiy, Lulu'Ayu Heru Handoyo Kurniawan Herwin Lukito, Herwin Hizkia Setya Simangunsong Miseri Roeslan Afany, Miseri Roeslan Mohammad Nurcholis, Mohammad Muhamad Nurcholis NADA SALSABILA PRADHANI Ni’maturrahma, Isna Nurul Hidayat Partoyo Partoyo Partoyo Partoyo, Partoyo R Agus Widodo R. Agus Widodo Safitri, Antika Dila Sarirotul 'Alim Simangunsong, Hizkia Setya Subroto P.S., S Suci Ramadhani, Ratnaning Wulan Surono, S Susila Herlambang Wibawati, Widya Wuri Handayani