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Improvement of the Quality of Acid Mine Dranage With Natural Zeolite with Case Study at South Sumatra Setyawan, Dwi
Jurnal Zeolit Indonesia Vol 6, No 2 (2007)
Publisher : Jurnal Zeolit Indonesia

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Some natural zeolite types have been exploited for long time to improve the quality of mine waste water. This research was to study the effect of natural zeolite from Lampung (Indonesia) to improve the quality of acid mine drainage from gold-mine in South Sumatra. The size of zeolite is 0,045-0,090 mm and it consist of the clinoptilolite, type. The zeolite column was made from PVC pipe with the length of 20 cm and the diameter of 10,2 cm. The zeolite column was leached in saturated condition during 12 weeks and was divided into four times intake of leached samples. Waste mine water taken from the location of Barisan Tropical Mining (Rawas gold project, Indonesia) on 21 and 23 July 1998. The water samples from pit Berenai contain relatively high iron ( 28 mg/l) and mangan of 9 mg/l, while zinc is less than 2 mg/l. The water generally very acid (pH 2,9) and contained the sulphate until 250 mg/l and the value of salinity of 28 mS/cm. The water sample from sediment pond and mining river generally contained iron, mangan and zinc lower compared to Berenai pit. Leached through zeolite column in the end of experiment contained of iron less than 1 mg/l, while manganese only a little changing. For water sample from Berenai pit, the column of zeolite reduced the sulphate content become 66 mg/l, decreased the salinity to less than 18 mS/cm, and increased the pH to 6,5 or more. The results indicated that natural zeolite from Lampung can be used to improve the quality of acid mine drainage. However, the application of the zeolite for larger scale still need detailed study.

Validasi Areal Terbakar dengan Metode Normalized Burning Ratio Menggunkan UAV (Unmanned Aerial Vehicle): Studi Kasus Agus Dwi Saputra; Dedi Setiabudidaya; Dwi Setyawan; Iskhaq Iskandar
Jurnal Penelitian Sains Vol 19, No 2 (2017)
Publisher : Faculty of Mathtmatics and Natural Sciences

Kebakaran hutan merupakan suatu bentuk bencana yang di picu oleh faktor alam maupun faktor kelalaian ma-nusia, bencana ini mempunyai dampak terhadap aspek-aspek kehidupan masyarakat. Salah satu dampaknya adalah de-gradasi hutan dan lahan terutama keanekaragaman hayati didalamnya. Untuk dapat menyusun rencana rehabilitasi pasca kebakaran pada wilayah yang luas dibutuhkan data area terbakar yang sudah terklasifikasi tingkat keparahan terbakarnya. Pada penelitian ini akan melakukan validasi tingkat keparahan terbakar pada kebakaran tahun 2015 di kawasan hutan gambut Merang-Kepayang. Data areal terbakar diturunkan dengan metoda Normalized Burning Ratio dari Citra Landsat 8 yang menggunakan kanal Near Infra Red (NIR) dan kanal Short Wave Infra Red (SWIR), dari perhitungan metoda NBR dihasilkan nilai ambang batas keparahan terbakar yang diklasifikasikan berdasarkan rentang nilai reflektansi yaitu unburned bernilai -1.02 - 0.29 μm, low bernilai 0.29 - 0.42 μm, moderate bernilai 0.42 - 0.55 μm, dan moderate extreme 0.55 - 0.80 μm. Setelah dilakukan klasifikasi tingat keparahan terbakar, kemudian dilakukan validasi hasil klasifikasi menggunakan foto udara dari Unmanned Aerial Vehicle (UAV) dengan 31 titik pengamatan lapangan dengan ketinggian terbang rata-rata 100 m dari permukaan tanah. Validasi menggunakan confusion matrix antara nilai reflektansi dan klasi-fikasi visual foto udara. Hasil validasi menyatakan bahwa akurasi keseluruhan adalah 70.97 % artinya tidak ditemukan perbedaan yang signifikan antara nilai indeks NBR dan klasifikasi lapangan. Dan juga nilai Koefisen Kappa 0.59 yang berarti hasil klasifikasi tersebut mampu mampu menghindari 59.2% kesalahan yang akan muncul pada klasifikasi lapangan.

Respirasi Tanah sebagai Indikator Kepulihan Lahan Pascatambang Batubara di Sumatera Selatan Dwi Setyawan; H. Hanum
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 3 No. 1 (2014)
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Soil respiration has been widely studied in relation to soil health and carbon sequestration. Respiration measurements are better performed in the field, either with in-situ static or dynamic systems. This study evaluated the recovery of coal post-mining land in Tanjung Enim, South Sumatra, which is reflected from the ground surface indicators and soil respiration. Observations were carried out at PT Bukit Asam location represented by Muara Tiga Besar (MTB). Secondary forest was also used as a reference. The area had been revegetated generally with sengon, bamboo and acacia in 2000 (North MTB), while planting in 2005, 2006 and 2007 only with acacia interspersed with eucalyptus (South MTB). Soil samples were taken with a number of brass rings and then divided into 0-2, 2-5 and 5-10 cm depth. Respiration with inverted box technique used a solution of 0.5 M KOH. Revegetation increased significantly the organic carbon content from 0.96% to 1.96%, although still lower than organic carbon of the forest soil with the average of 2.81%. There was also a similar pattern found for total N and available P. It is evident that soil enrichment occurs in the 0-2 cm layer. In situ soil respiration showed no consistent increase with age of revegetation with values ranging from 670 to 767 mg CO2/m2 per hour, while the forest soil reaches 789 mg CO2/m2 per hour. Based on these facts we conclude that soil respiration can not be used as the sole indicator of recovery in coal post-mining land, thus needs to be combined with other variables.

Emisi Karbon Lahan Gambut pada Agroekosistem Kelapa Sawit M. B. Prayitno; Sabaruddin Sabaruddin; D. Setyawan; Yakup Yakup
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 3 No. 1 (2014)
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Carbon emissions is one of the activities of agroecosystem impacts of oil palm on peat land as a result of the making drainage and plant growth. This research was conducted in the area of oil palm agroecosystem on peat land landscape, Ogan Komering Ilir District, South Sumatra with the aim of estimating reserves and carbon emissions on the land. Contribution of carbon emissions on the land with plant age 5, 3 and 2 years without drainage channels are respectively 12.027; 11.262 and 9.783 tons CO2/year, as well as plants age of 5 years with the drainage channel is 14.723 tons of CO2/year. Contribution of carbon emissions from the making drainage channel reaches 2,696 tons of CO2/ha/year and greater than the contribution of carbon emissions from the aging plant palm oil annually, amounting to 0.383 to 1.479 tons of CO2/ha/year.

Pendugaan Cadangan Karbon Gambut pada Agroekosistem Kelapa Sawit M. B. Prayitno; Sabaruddin Sabaruddin; D. Setyawan; Yakup Yakup
Jurnal Agrista Vol 17, No 3 (2013): Volume 17 Nomor 3 Desember 2013
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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ABSTRAK. Peranan gambut terhadap lahan degradasi menjadi sangat penting dan bernilai dalam hal cadangan karbon karena berdampak terhadap hilangnya vegetasi akibat penggundulan dan kebakaran hutan. Penelitian ini dilaksanakan pada lahan gambut pada agrosistem kelapa sawit di Kabupaten Ogan Komering Ilir, Sumatera Selatan. Tujuan penelitian ini untuk menduga cadangan karbon gambut. Hasil penelitian menunjukkan bahwa kedalaman gambut berkisar antara 200 – 850 cm, bulk density antara 0,211 – 0,347 g cm-3 dan kandungan organik C sekitar 56,30 - 58,31%. Prediksi cadangan karbon adalah sebesar 1,675.361 - 9.055,922 ton C ha-1. The Prediction of Peatland Carbon Stocks in Oil Palm AgroecosystemsABSTRACT. The role of peat on degraded land becomes extremely important and valuable, for being the last carbon stocks because of the loss of vegetation due to deforestation and forest fires. This research was conducted in peatlands that have been used for oil palm agro-ecosystem, Ogan Komering Ilir District, South Sumatra. The purpose of the study was to estimate carbon stocks in peatlands. The results showed that the peat depth ranged from 200 to 850 cm, the bulk density between 0.211 to 0.347 g cm-3 and the organic C content of approximately 56.30 -58.31%. The prediction of carbon stock ranged from 1.675,361 ton C ha-1 to 9.055,922 ton C ha-1.

Nutrient Cycling Index in Relation to Organic Matter and Soil Respiration of Rehabilitated Mine Sites in Kelian, East Kalimantan Dwi Setyawan; Robert Gilkes; David Tongway
JOURNAL OF TROPICAL SOILS Vol 16, No 3: September 2011
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2011.v16i3.219-223

Degraded soils at mine sites are often associated with decreased soil fertility. However, soil nutrient status might be improved through biomass recovery primarily from re-vegetation. This paper relates nutrient cycling index (NCI) derived from Landscape Function Analysis (LFA) to soil respiration and soil organic matter as a measure of improving soil condition after rehabilitation. Fieldwork was conducted at Kelian Equatorial Mining, East Kalimantan in June 2001. Four sites were selected representing rehabilitation work in 1994 (7 year), 2000 (1 year) and 2001 (3 month), and a reference site of undisturbed primary forest. The NCI value was calculated from scores of basal/canopy cover, litter (abundance, origin and degree of incorporation), cryptogam cover and surface roughness. Soil respiration was measured using the inverted-box method. In general, the NCI values increased with age of rehabilitation (12 to 56 %) showing a significant increase compared with the values of reference site (80%). Soil respiration varied greatly and the values were equally high (200-800 mg CO2 m-2 hr2) across all sites. Tropical soils like those of Kelian might be inherently rich of soil organism as shown by high value of soil respiration. Nevertheless, the NCI values were not systematically related to soil respiration. We found that increased organic matter may be used as early sign of functioning soil resources in degraded land.

Studi Timbulan dan Komposisi Sampah di Kelurahan Sindur dan Kelurahan Pangkul, Kecamatan Cambai, Kota Prabumulih Septarini Eka Putri; Ngudiantoro Ngudiantoro; Dwi Setyawan
Jurnal Kependudukan Sriwijaya Vol 1 No 1 (2017): DEJOS VOL 1, No 1 (Januari 2017)
Publisher : Program Studi Kependudukan, Pascasarjana Universitas Sriwijaya

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Tujuan penelitian adalah untuk mengetahui besarnya timbulan dan komposisi sampah di Kelurahan Pangkul dan Sindur Kecamatan Cambai, Kota Prabumulih. Pada kedua lokasi tersebut belum adanya pengelolaan sampah dan sebagian masyarakat membuang sampah ke bantaran sungai. Penelitian ini bersifat kuantitatif. Populasi penduduk di Kelurahan Sindur sebanyak 580 KK, sedangkan di Kelurahan Pangkul 807 KK. Jumlah sampel dihitung berdasarkan SNI M 36-1991-03, sehingga untuk masing-masing kelurahan diambil 10 KK sebagai sampel. Pengukuran timbulan dan komposisi sampah dilakukan selama 7 hari berturut- turut. Hasil penelitian rata rata jumlah timbulan sampah per rumah tangga di Kelurahan Sindur adalah 1,8 kg/hari atau 0,5 kg/orang/hari. Sedangkan rata rata jumlah timbulan sampah per rumah tangga di Kelurahan Pangkul sebesar 2,58 kg/hari atau 0,6 kg/orang/hari. Jumlah timbulan sampah di Kelurahan Pangkul dan Sindur sangat dipengaruhi oleh jenis aktivitas penduduk. Berdasarkan komposisinya persentase jenis sampah organik sangat tinggi yaitu 77 % di Kelurahan Pangkul dan 70% di Kelurahan Sindur. Jenis sampah organik ini berasal dari jenis sampah sisa makanan dan sampah pekarangan/taman.

Metode Klasifikasi Normalized Difference Vegetation Index Berbasis Citra Landsat 8 untuk Identifikasi Sebaran Kondisi Kesehatan Tanaman Kelapa Sawit di PT. Andira Agro, Sumatera Selatan Rosa Bela Yurianda; Dwi Setyawan; Warsito Warsito
Pedontropika : Jurnal Ilmu Tanah dan Sumber Daya Lahan Vol 8, No 2 (2022): Agustus
Publisher : Soil Science Department, Faculty of Agriculture, Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pedontropika.v8i2.56431

Kesehatan tanaman merupakan hal yang penting karena dapat meningkatkan produktivitas tanaman dan keberlanjutan produksi tanaman tersebut. Perkebunan kelapa sawit merupakan areal yang luas sehingga dalam pengamatan kesehatan kelapa sawit ini dapat menggunakan penginderaan citra satelit. Penilaian secara cepat kesehatan tanaman kelapa sawit dengan menggunakan metode NDVI berbasis citra Landsat 8 dapat dengan cara menganalisis tingkat kehijauan daun. Penelitian ini bertujuan untuk menilai kondisi kesehatan tanaman sawit dan untuk mengetahui tingkat akurasi penilaian kesehatan kelapa sawit berbasis citra Landsat 8. Penelitian ini dilaksanakan di PT. Andira Agro, Kabupaten Banyuasin, Sumatera Selatan. Penelitian ini menggunakan metode klasifikasi NDVI dengan band komposit 562. Hasil analisis kandungan klorofil total tertinggi terdapat pada tahun tanam 1999 sebesar 26,13 mg/L dan nilai kandungan klorofil total terendah terdapat pada tahun tanam 2008 sebesar 16,67 mg/L. Nilai kesehatan tanaman kelapa sawit di PT. Andira Agro dapat dibagi menjadi tiga kelas yang menunjukkan kesehatan vegetasi buruk terdapat pada rentang nilai berkisar 0,11 hingga 0,22. Kesehatan vegetasi normal berkisar 0,22 hingga 0,42; sedangkan, kesehatan vegetasi baik berkisar 0,42 hingga 0,72. Nilai hasil prediksi dan hasil pengukuran lapangan memiliki hubungan yang positif.

Respirasi Tanah sebagai Indikator Kepulihan Lahan Pascatambang Batubara di Sumatera Selatan Dwi Setyawan; H. Hanum
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 3 No. 1 (2014)
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33230/JLSO.3.1.2014.109

Soil respiration has been widely studied in relation to soil health and carbon sequestration. Respiration measurements are better performed in the field, either with in-situ static or dynamic systems. This study evaluated the recovery of coal post-mining land in Tanjung Enim, South Sumatra, which is reflected from the ground surface indicators and soil respiration. Observations were carried out at PT Bukit Asam location represented by Muara Tiga Besar (MTB). Secondary forest was also used as a reference. The area had been revegetated generally with sengon, bamboo and acacia in 2000 (North MTB), while planting in 2005, 2006 and 2007 only with acacia interspersed with eucalyptus (South MTB). Soil samples were taken with a number of brass rings and then divided into 0-2, 2-5 and 5-10 cm depth. Respiration with inverted box technique used a solution of 0.5 M KOH. Revegetation increased significantly the organic carbon content from 0.96% to 1.96%, although still lower than organic carbon of the forest soil with the average of 2.81%. There was also a similar pattern found for total N and available P. It is evident that soil enrichment occurs in the 0-2 cm layer. In situ soil respiration showed no consistent increase with age of revegetation with values ranging from 670 to 767 mg CO2/m2 per hour, while the forest soil reaches 789 mg CO2/m2 per hour. Based on these facts we conclude that soil respiration can not be used as the sole indicator of recovery in coal post-mining land, thus needs to be combined with other variables.

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