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All Journal Journal of Degraded and Mining Lands Management Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management)
Athiyya, Salma
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science

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Isothermal Modelling of Glyphosate Herbicide Adsorption Using Biochar andHumic Substances from Palm Oil Mill Waste Athiyya, Salma; Yulnafatmawita; Amsar Maulana; Herviyanti
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 15 No 6 (2025): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.15.6.947

Abstract

Penggunaan herbisida glifosat secara luas menimbulkan masalah lingkungan karena sifatnya yang persisten dan berpotensi mencemari sistem air dan tanah. Mengoptimalkan pengembangan metode adsorpsi yang ramah lingkungan dengan memanfaatkan limbah pabrik kelapa sawit melalui konversi menjadi biochar dan zat humat, dapat mengurangi polusi dan mendukung pengelolaan limbah yang berkelanjutan. Penelitian ini telah melakukan pemodelan adsorpsi isotermal herbisida glifosat menggunakan konversi limbah pabrik kelapa sawit dalam bentuk larutan. Adsorpsi isotermal herbisida glifosat dengan metode kesetimbangan batch. Adsorpsi herbisida glifosat pada limbah pabrik kelapa sawit yang dikonversi dalam bentuk larutan menunjukkan peningkatan dengan meningkatnya konsentrasi glifosat dan pH. Kapasitas adsorpsi dan koefisien herbisida glifosat dengan formulasi 25% biochar-tandan kosong kelapa sawit dan 75% zat humat-padatan dekanter basah adalah 750,53 mg g-1 dan 93,70 L g-1 pada pH 5,2 dan konsentrasi 20,025 mg L-1. Isoterm adsorpsi herbisida glifosat terjadi pada model Freundlich dan Langmuir (Langmuir > Freundlich) di mana, model Freundlich (y = -0,9563x + 4,9729; R² = 0,4961) dengan nilai n (1,04); KF sebesar 93.950,69 (L mg-1)1/n, dan 1/n sebesar 0,96. Sementara itu, model Langmuir (y = 2,4112x + 0,0002; R² = 0,9785), dengan Qm rata-rata 5.000 mg g-1; KL sebesar 0,0001 L mg-1 dan RL sebesar 0,0002 (menguntungkan). Aplikasi biochar 25% tandan kosong kelapa sawit dan formulasi padatan dekanter basah 75% zat humat dari biokonversi limbah pabrik kelapa sawit, berpotensi mengurangi pencemaran/polusi glifosat pada lahan perkebunan kelapa sawit sebagai pembenah tanah dan mendukung pengelolaan limbah berkelanjutan.
Linking glyphosate herbicide residues to degradation in Ultisols under chronosequences of oil palm plantations Rezki, Dewi; Maulana, Amsar; Athiyya, Salma; Herviyanti , Herviyanti
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10983

Abstract

The continuous use of glyphosate herbicides in long-term oil palm monoculture systems has raised significant environmental concerns because of their potential to accelerate Ultisols degradation and prolong herbicide residue persistence across plantation age chronosequences. This study evaluated the physicochemical properties of glyphosate-contaminated Ultisols under oil palm plantations of different ages using a quantitative survey approach with randomized sampling. Soil samples were collected from plantations aged <5, 5-10, 10-15, 15-20, and >20 years, with forest soil as a control, at a depth of 0-20 cm. Long-term oil palm cultivation significantly alters the physical and chemical properties of Ultisols. Conversion from forest to young plantations increases bulk density from 0.85 to 1.31 g cm?³ while reducing porosity, water content, and permeability, indicating severe structural degradation. Although plantations >20 years old show improvements in soil quality, the ecological state of forest soils is not fully restored. Ultisols remain highly acidic (pH 4.43-5.30) and exhibit highly variable loading properties that influence nutrient retention and glyphosate adsorption. Glyphosate residues increase with age, with the highest soil residues in 10-15-year-old plantations (18.07 mg kg?¹) and in oil palm fruits in 15-20-year-old plantations (16.94 mg kg?¹). Plantation age, organic matter dynamics, and herbicide use intensity have been identified as key influences on soil degradation, nutrient imbalance, and glyphosate persistence in tropical oil palm agricultural ecosystems.
Co-Authors Amsar Maulana Herviyanti Herviyanti , Herviyanti Maulana, Amsar Yulnafatmawita