Articles
HUJAN ASAM DAN LEACHING Fe KE DALAM AIR SUMUR DI WILAYAH INDUSTRI
- Sutanto;
Ani Iryani;
Syaiful Anwar;
Tania June
EKOLOGIA Vol 11, No 1 (2011): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan
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DOI: 10.33751/ekol.v11i1.247
Wilayah Cibinong-Citeureup terdapat banyak industri, berdebu, dan telah mengalami hujan asam. Salah satu dampak hujan asam adalah degradasi kualitas air sumur. Lebih kurang 75% penduduk di wilayah ini yang memanfaatkan air sumur sebagai air minum. Telah dipelajari distribusi dan dampak hujan asam terhadap peningkatan kadar Fe dalam air sumur. Monitoring air hujan dilakukan pada 30 menit pertama hujan pada 16 lokasi dari tahun 1999 sampai 2009. Data keasaman air hujan setiap tahun dipetakan menggunakan program sufer 6, selanjutnya dilakukan overlay dan diidentifikasi daerah yang mengalami hujan asam intensitas tinggi secara terus-menerus. Monitoring kadar Fe air sumur dilakukan pada 16 lokasi sumur dari tahun 1999 sampai 2009. Keasaman air diukur menggunakan pH meter elektronik, dan Fe ditentukan dengan metoda o-fenantrolin menggunakan spektrofotometer UV-VIS. Hasil penelitian menunjukkan bahwa daerah yang terus-menerus mengalami hujan asam intensitas tinggi (pH5,0) terjadi seluas 4 km2. Dalam daerah hujan asam intensitas tinggi ini keasaman air hujan terus meningkat dari tahun 1999-2009. Peningkatan keasaman air hujan menyebabkan leaching Fe ke dalam air sumur secara nyata (P 0,049, 95%).Kata kunci: Hujan asam,, leaching, Fe, air sumur, industri
Potensi Pengembalian Karbon Organik dan Hara dalam Sistem Perkebunan Kelapa Sawit
Fuadi Irsan;
Syaiful Anwar
Seminar Nasional Lahan Suboptimal 2020: Prosiding Seminar Nasional Lahan Suboptimal ke-8 “Komoditas Sumber Pangan untuk Meningkatkan K
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya
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Irsan F, Anwar S. 2020. Potential returns of organic carbon and nutrients in oil palm plantation systems. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang 20 Oktober 2020. pp. xx. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Oil palm plantations development in peatlands is still being a concern related to global trade and environment issues such as issue which related to terrestrial carbon. The existing estimation of oil palm carbon absorption was only focused on standing biomass. Organic carbon which is derived from harvested biomass (fresh fruit bunch) and returned biomass through pruning has not much been studied in terms of oil palm carbon absorption. Meanwhile, concerning carbon absorbtion in oil palm biomass in peatland has not been much data collected because of the large cost and takes a long time. Based on that situation, this research was conducted at a detailed level so that it can provide information about carbon absorbtion on peatland that have been converted into oil palm agroecosystem. Besides organic carbon, returned biomass also contained essential nutrients such as potassium, calcium and magnesium which very crucial for cultivation in peatlands. The objectives of this research were to study the potency of biomass, carbon and nutrient (K, Ca and Mg) returned in one life cycle of oil palm. The result shows that the potency of returned biomass in one life cycle was 102.21-130.00 tons dry matter/ha or equivalent to 206.71-262.91 tons CO2/ha. While returned nutrient was 1.40-1.78 tons K/ha, 550.35-699.99 kg Ca/ha and 276.03-351.08 kg Mg/ha.
POTENSI GAMAL (Gliricidia sepium) SEBAGAI BAHAN BAKU PEMBANGKIT LISTRIK TENAGA BIOMASSA STUDI KASUS : KABUPATEN MANGGARAI TIMUR (NTT)
Dedi Hudaedi;
Hariyadi Hariyadi;
Syaiful Anwar
Journal of Environmental Engineering and Waste Management Vol 3, No 1 (2018)
Publisher : President University
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DOI: 10.33021/jenv.v3i1.397
The ability of East Manggarai Regency to meet the electricity needs of the region is estimated at only 44.91%. This metter is caused by natural conditions that have a dry climate and critical land, making it difficult to can improve of community economy and generaly region for development of adequate electricity. Therefore, the electrical energi need has been to development challenge, while fossil energi untenable. The construction of a biomass from the Gamal (Gliricidia sepium) plant is a potential alternative to develop. This research aimed to identify the potential lands for Gamal and predict the electricity potency. The method was image analysis from Citra TM 8 using GIS Version 10.1 as an analysis tool. Collecting data was through community interviews with purposive sampling method. The results of this study described the degraded land areas of 187.462,01 hectares which are the potential land for Gamal planting. Prediction of critical lands could produce 98 181.76 m3 of wood products and generate 18.90 MW / year of electricity.
Potential Use of Alkaline-Activated Indonesian Pumice Powder as Lead Adsorbent in Solution System
Faridlotul Hasanah;
Syaiful Anwar;
Arief Hartono;
Untung Sudadi
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 16, No 2 (2019): December
Publisher : Universitas Sebelas Maret
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DOI: 10.20961/stjssa.v16i2.34621
Pumice is a volcanic material that found abundant in Indonesia. Owing to its physicochemical characteristics it can be utilized as a low-cost natural adsorbent for cationic contaminants. This study aimed to assess the performances of adsorbents prepared from NaOH-activated powder of Lombok and Kediri pumices for lead removal in solution systems based on their maximum adsorption capacity and removal efficiency parameters. The adsorption tests were done in batch experimentation using pumice powder of 74 μm particle size activated with 0.5, 1, and 2 M NaOH and lead solutions with initial concentrations of 0-260 mg.L-1. The most favorable NaOH activation concentration for both pumices was 0.5 M which resulted from Lombok pumice prepared-adsorbent with Pb maximum adsorption capacity based on linearized conventional and rearranged Langmuir isothermal adsorption models of 236.4 and 186.3 mg.g-1, while those of Kediri pumice were of 218.4 and 210.8 mg.g-1, respectively. The removal efficiency of both adsorbents were >80% at the initial Pb concentration of <100 mg.L-1 and around 50-80% at 100-260 mg.L-1. Both pumices are therefore considered potential to be utilized as an adsorbent for cationic contaminants in solution systems with reliable performances.
Analisis Urban Sprawl sebagai Rekomendasi Pengendalian Pemanfaatan Ruang untuk Pengembangan Lahan Pertanian di Kabupaten Karawang: Urban Sprawl Analysis as a Recommendation of Spatial Utilization Control for Agricultural Land Development in Karawang Regency
Masyitah Tri Andari;
Andrea Emma Pravitasari;
Syaiful Anwar
Journal of Regional and Rural Development Planning (Jurnal Perencanaan Pembangunan Wilayah dan Perdesaan) Vol. 6 No. 1 (2022): Journal of Regional and Rural Development Planning (Jurnal Perencanaan Pembangu
Publisher : P4W LPPM IPB
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DOI: 10.29244/jp2wd.2022.6.1.74-88
The increasing conversion of agricultural land to non-agricultural land is the central issue in Karawang Regency. It is caused by the increasing population, urbanization, industrialization, urban expansion, and its position in the Jakarta Bandung Mega Urban Region (JBMUR) corridor. The increasing need for space in urban areas encourages the development to the city’s outskirts (urban sprawl). Urban sprawl is the biggest challenge in Karawang Regency’s spatial planning. The purpose of this study is to identify the spatial pattern of urban sprawl conditions formed from 2009 until 2018 and projecting urban sprawl in 2018 until 2031 as a recommendation for controlling space use for agricultural land development. The method used is urban sprawl analysis with related research, Moran index autocorrelation analysis and Local Indicator of Spatial Association (LISA), analysis of land use alignment and spatial patterns of spatial plan, and overlays. The results of this study indicate that the spatial distribution of urban sprawl occurs along the Cikampek, Telukjambe Barat, Telukjambe Timur, Pangkalan, and Tegalwaru toll roads. The urban sprawl that occurred in 2009 until 2018 has the type of leapfrog development. There was a change to the kind of urban sprawl to kind of ribbon development and an increase in the urban sprawl of 67.14 km2 in the projected urban sprawl in 2018 until 2031. Land use with conformity is much broader than land use that is not aligned with spatial planning. Therefore, first priority recommendation for agricultural land development still dominates in Karawang Regency.
Subsidence and Percentage of CO2 Emission from Decomposition to Subsidence of Peatland on Oil Palm Plantations
Affan Chahyahusna;
Dwi Putro Tejo Baskoro;
Syaiful Anwar
AGRIVITA, Journal of Agricultural Science Vol 44, No 2 (2022)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI
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DOI: 10.17503/agrivita.v44i2.3038
Peatlands drainage system aimed to eliminate the limiting factors to support better growth of plants. Drainage practices will cause subsidence and be associated with CO2 emission. The purpose of this study was to observe the subsidence rate on tropical peatlands of oil palm plantations at different ages and to establish the percentage of decomposition of peat materials from the subsidence rate. Subsidence was measured in 9-, 12-, and 17-year-old of adjacent oil palm planting blocks with peat thickness of about 5 m and have been drained for 10–18 years, two samples taken for each block every three month. Peat decomposition was measured in the 12-year-old block automatically using LiCor Li-8100A with 30 minutes recording interval. Peat decomposition (heterotrophic respiration) considered as actual CO2 emission was compared to emission calculated from subsidence and considered as potential CO2 emission. The average subsidence rate observed for one year in the three age classes of oil palm plantations was 2.47 ± 0.76 cm/year. The percentage of CO2 emissions from the decomposition process to subsidence on drained 12-year-old oil palm on tropical peatlands was 41.05%. The subsidence data indicates that consolidation still the main process of subsidence in this peatland.
RANCANGAN APLIKASI PENJUALAN PERLENGKAPAN DAN MAINAN ANAK MENGGUNAKAN KONSEP MODEL VIEW CONTROLLER (MVC)
Syaiful Anwar
Jurnal Riset Sistem Informasi dan Teknologi Informasi (JURSISTEKNI) Vol 2 No 1 (2020): JURNAL RISET SISTEM INFORMASI DAN TEKNOLOGI INFORMASI (JURSISTEKNI)
Publisher : Universitas Nusa Putra
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DOI: 10.52005/jursistekni.v2i1.37
Perkembangan teknologi informasi semakin dikalangan dunia usaha dan banyak perusahaan dibidang retail mulai menggembangkan sistem administrasinya dengan menggunakan teknologi informasi. Tak dipungkiri penggunaan teknologi saat ini merupakan kebutuhan yang tidak bisa ditolak dalam mengembankan dan meningkatkan keuntungan usaha suatu perusahaan. Salah satunya adalah dengan menggunakan aplikasi yang berbasis web secara online. Dengan menggunakan aplikasi berbasis web dapat menjadi solusi dalam memecahkan permasalan yang terkait dengan pemasaran dan penjualan produk. Sistem informasi penjualan berbasis web mulai dikembangkan oleh PT Harmoni Lintas Gaya, sistem informasi tersebut mengolah data penjualan perlengkapan dan mainan anak. Dalam menyusun dan merancang sistem informasi penjualan ini dapat menggunakan framework Codeigniter dengan metode Model-View-Controller (MVC). Konsep MVC ini melakukan pemisahan bagian berupa Model, View, dan Controller. Dengan konsep ini dapat mempermudah dalam rancang bangun aplikasi penjualan perlengkapan dan mainan anak. Dalam pembagunan sistem informasi ini juga menggunakan basis data dan bahasa pemrograman yang dapat memberikan hasil tampilan yang lebih user friendly dan mudah digunakan oleh pemakai atau user. Hasil yang ingin diharapkan adalah sistem informasi atau aplikasi penjualan perlengkapan dan mainan anak pada PT. Harmoni Lintas Gaya dapat memberikan pemecahan masalah terkait dengan memperluas jangkauan pemasaran dan meningkatkan nilai penjualan serta memudahkan user dalam melakukan transaksi penjualan perlengkapan dan mainan anak. Aplikasi ini mendapatkan nilai kelayakan sebesar 82.8%, artinya aplikasi ini layak diterapkan pada sistem penjualan perusahaan.
ANALISIS STRATEGI PEMASARAN PT GRIYA AGUNG SUMEKAR DALAM MENGHADAPI PERSAINGAN DI KABUPATEN SUMENEP
Syaiful Anwar;
Miftahol Arifin
PERFORMANCE: Jurnal Bisnis & Akuntansi Vol 9 No 2 (2019): Performance : Jurnal Bisnis & Akuntansi
Publisher : Fakultas Ekonomi dan Bisnis
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DOI: 10.24929/feb.v9i2.793
Pemasaran adalah serangkaian proses untukmenyampaikaninformasi kepadakonsumen. strategi pemasaran ada hal-hal yang harus di perhatikan oleh pengembang dalam menggunakan strategi pemasaran yang sesuai yaitu dalam melihat kemampuan perusahaan yaitu dengan analisis SWOT pada PT GRIYA AGUNG SUMEKAR, dan untuk mengetahui bagaimana strategi pemasarannya yang telah diterapkan serta solusi alternative dari peneliti untuk perusahaan PT GRIYA AGUNG SUMEKAR sehingga strategi pemasarannyadipakai untuk mencapai tujuan Penelitian ini menggunakanpendekatan kualitatif deskriptif yaitu tehnik pengumpulan datanya memakai wawancara, observasi, dan selanjutnya data-data tersebut akan dianalisis memakai analisis SWOT. penelitian ini terdapat strategi yang digunakan oleh PT GRIYA AGUNG SUMEKAR yaitu melalui strategi harga, kualitas, personal seling, dan sales promosi. Begitupun dengan analisis SWOT dimana strategi-strategi yang digunakan untuk pemasaran PT GRIYA AGUNG SUMEKAR berdasarkan dari hasil penelitian PT GRIYA AGUNG SUMEKAR mampu bersaing.
Analisis Potensi Pajak Restoran di Kota Bengkulu
Sahuddin Sahuddin;
Pakri Fahmi;
Syaiful Anwar
PARETO : Jurnal Ekonomi dan Kebijakan Publik Vol 1 No 1 (2018): PARETO
Publisher : Fakultas Ekonomi Universitas Prof. Dr. Hazairin, SH. Bengkulu
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Restaurant tax is one of the taxes that are the authority of local government. In the city of Bengkulu, restaurant taxes ranked fourth with contributions of 9.63 percent. This study aims to analyze the acceptance and potential of Restaurant Tax in Bengkulu City. The results of the study indicate that the acceptance of restaurant taxes in the city of Bengkulu is still below the true potential. The structure of tax revenue is dominated by the categories of restaurants and cafes, which contributes about 92.6 percent, while the stalls and restaurants contribute 7.4 percent, whereas in quantity the number of taxpayers stalls and restaurants is much larger, reaching 85,3 percent of all existing taxpayers. The main sources of tax increase have been pointed out, among other things, from potential new restaurant tax sources, particularly in restaurant and café categories. Based on trend analysis and average value approach of actual payment ratio and tax potential, the tax potential of restaurants in Bengkulu city for 2017 is estimated to be around Rp 6.5 billion and will continue to increase to Rp. 9.7 billion in 2021