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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan) Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management)
Yulnafatmawita
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Agriculture, Biological Sciences & Forestry 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.
DAMPAK PENGGUNAAN LAHAN TERHADAP STOK KARBON DI TANAH GAMBUT: STUDI PERBANDINGAN DAN IMPLIKASI KEBIJAKAN Ilmi, Rozatul; Hermansah; Yulnafatmawita; Yasin, Syafrimen
JTSL (Jurnal Tanah dan Sumberdaya Lahan) Vol. 13 No. 1 (2026)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2026.013.1.1

Abstract

Tropical peatlands are among the largest carbon stocks on earth, but also the most vulnerable to anthropogenic disturbances. This study aims to analyze the impacts of land-use change on carbon stocks in peatlands, focusing on conversion to plantations, agriculture, and infrastructure, as well as to evaluate the effectiveness of restoration strategies and protection policies. Using a systematic review approach of 50 recent scientific publications (2010–2025), the results show that peatland conversion causes large amounts of carbon release, ranging from 70–120 tons of CO₂ per hectare per year, accompanied by land subsidence of up to 7 cm per year. Drainage and land fires are the main factors accelerating carbon emissions. In contrast, restoration efforts through rewetting and revegetation have been shown to reduce emissions by up to 65% and increase long-term carbon accumulation. The success of this strategy is greatly influenced by the biophysical conditions of the land, policy support, and local community participation. This study recommends the need for an integrated approach that includes moratoriums, economic incentives, legal strengthening, and technology-based monitoring as strategic steps in protecting carbon stocks and mitigating climate change.
PENGARUH APLIKASI BIOCHAR TERHADAP PERTUMBUHAN Brassica rapa DI INCEPTISOL KAKI GUNUNG MARAPI DAN GUNUNG SINGGALANG Nabila; Yulnafatmawita; Adrinal
JTSL (Jurnal Tanah dan Sumberdaya Lahan) Vol. 13 No. 1 (2026)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2026.013.1.6

Abstract

Inceptisol is a marginal soil type with low fertility, limited water retention, and an acidic pH, which poses challenges for horticultural cultivation, including chaisim (Brassica rapa var. parachinensis). This study aimed to evaluate the effect of biochar dosage on soil physical properties, soil pH, and chaisim growth in Inceptisol from three locations: Singgalang, Padang Lua, and Sariak. Five biochar dosages were used (0, 15, 20, 25, and 30 tons/ ha-1). The observed parameters included water percolation, soil pH, and fresh plant weight. Results showed that the 20 tons/ha-1 dose gave the best results by reducing water percolation by up to 4%, increasing soil pH from 6.38 to 6.42, and producing the highest fresh plant weight of 203 grams per pot, which was much higher than the control (11 grams per pot). The increased soil pH improved the availability of nutrients such as phosphorus, calcium, and magnesium, which are important for plant growth. However, the 30 tons/ ha-1  biochar dose caused soil pore saturation, reducing aeration and nutrient uptake efficiency, resulting in a lower fresh plant weight of 97 grams per pot. Combining biochar with NPK fertilizer also improved water use efficiency and nutrient availability. The effectiveness of biochar was further influenced by initial soil characteristics, with the best results found in soil from Singgalang.This study showed that biochar could be a sustainable soil management strategy to improve horticultural crop productivity on marginal tropical soils.
Co-Authors Adrinal Amsar Maulana Athiyya, Salma Hermansah Herviyanti Ilmi, Rozatul Nabila Syafrimen Yasin