Rumah Jurnal Online - Fakultas Sains dan Teknologi UIN Sunan Ampel Surabaya
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Economic valuation of Pade'an Hamlet mangrove forest, Jarangan Village, Rejoso District, Pasuruan Regency, Indonesia
Full text linkThe mangrove ecosystem has enormous benefits for the community, especially for people who live on the coast, including the mangroves in the Pade'an Hamlet, Jarangan Village, Rejoso District, Pasuruan Regency. This study aims to determine the economic value of mangrove forest in Pade’an Hamlet area using total economic value approach. This study used descriptive analysis to explain the activity of utilizing the natural resources of the mangrove ecosystem and quantitative analysis to calculate the total economic value of the mangrove ecosystem. The economic value of mangrove forests in the Pade'an Hamlet area per year is IDR 10,092,881,400.00. The total economic value obtained from the direct-use value (utilization of the fisheries sector) amounted to IDR 7,593,550,000.00/year, indirect-use value (abrasion restraints) amounted to IDR 2,335,952,000.00/year, option value (biodiversity) amounted to IDR 13,379,400.00/year, and existence value calculated from the willingness to pay of the local community is IDR 150,000,000.00/year. The magnitude of the total economic value of the mangrove ecosystem in Pade’an Hamlet area indicates that the mangrove ecosystem provides huge of essential benefits to the community
Evaluasi Jejak Karbon pada Produksi Black Garlic Sembalun menggunakan Pendekatan Penilaian Daur Hidup (Life Cycle Assessment)
Full text linkAbstract
Sembalun is well known as one of tourism destination in Lombok Island with main attraction is Rinjani Mountain hiking. Currently, there are also some other tourism attractions such as hill climbing, garden and fruit tours, and photo spots. In addition, many people come to spend their weekend in Sembalun. The increase in the number of tourist visits to Sembalun is an opportunity to develop various Sembalun souvenirs. One of them is Sembalun black garlic. Black Garlic Sembalun uses garlic as a raw material. The purpose of this study is to estimate the carbon footprint of Sembalun black garlic production where the method used is a Life Cycle Assessment. The unit function used is the production of black garlic in a month. A case study was taken from the UMKM KWT Putri Rinjani in Sembalun Bumbung Village which produces black garlic. There are five stages in the black garlic production process, namely transportation, drying, peeling, roasting, and packaging. From the results of the analysis using the OpenLCA software, three process stages contributed to the carbon footprint of Sembalun black garlic production, namely the transportation stage (52.125 KgCO2eq), the roasting stage (46.707 KgCO2eq), and the packaging process (6.930 KgCO2eq). To reduce the carbon footprint, several sustainable improvement alternatives that can be carried out include storing (stock) raw material to reduce the number of transportation trip and using transportation vehicles that have better combustion efficiency and the use of electric vehicles.
Keywords: carbon footprint, black garlic, transporting, roasting, packaging.Abstrak
Sembalun terkenal sebagai salah satu tujuan destinasi utama wisata di Pulau Lombok dengan daya tarik utama adalah pendakian ke Gunung Rinjani. Dalam perkembangannya, berkembang atraksi lainnya seperti mendaki bukit, wisata kebun dan buah, tempat foto. Selain itu, banyak warga yang datang untuk menikmati akhir pekan di Sembalun. Peningkatan jumlah kunjungan wisatawan ke Sembalun ini menjadi peluang pengembangan berbagai oleh-oleh khas Sembalun. Salah satunya adalah black garlic Sembalun. Black garlic Sembalun ini menggunakan bahan baku bawang putih. Tujuan dari kajian ini adalah melakukan estimasi jejak karbon dari produksi black garlic Sembalun dimana metode yang digunakan adalah penilaian daur hidup (Life Cycle Assesment). Unit fungsi yang digunakan adalah produksi black garlic dalam sebulan. Sebuah studi kasus diambil dari UMKM KWT Putri Rinjani di Desa Sembalun Bumbung yang memproduksi black garlic. Ada lima tahapan dalam proses produksi black garlic yaitu transportasi, penjemuran, pengupasan, pemanggangan, dan pengemasan. Dari hasil analisa menggunakan software OpenLCA dihasilkan tiga tahapan proses yang memberikan kontribusi pada jejak karbon produksi black garlic Sembalun yaitu tahapan transportasi (52,125 KgCO2eq), tahapan pemanggangang (46,707 KgCO2eq), dan proses pengemasan (6,930 KgCO2eq). Untuk mengurangi jejak karbon maka beberapa alternatif perbaikan berkelanjutan yang bisa dilakukan antara lain melakukan penyimpanan (stock) raw material untuk mengurangi jumlah ritase pengangkutan dan menggunakan kendaraan pengangkutan yang memiliki efisiensi pembakaran yang lebih baik serta penggunaan kendaraan listrik. Kata Kunci: jejak karbon, black garlic, sembalun, pengangkutan, pemanggangan, pengemasan
Remediasi Tanah Tercemar Timbal di Lokasi Pertambangan Emas Selogiri, Wonogiri dengan Menggunakan Tuf Zeolitik
Full text linkSoil contamination was commonly found in gold mining location in Selogiri, Wonogiri, and Central Java and need serious attention for remediation action. This study aimed to investigate the mineralogical characteristic of zeolitic tuff and to analyze the influence of its characteristic for lead sorption on soil in mining, as mentioned earlier location. The soil sample was obtained from around the gold mining location. The zeolitic tuff was obtained in two locations in Gunungkidul, Yogyakarta: A and B. Zeolitic tuff samples were then characterized for mineralogy content using polarization microscopes, cation exchange capacity (CEC) by using barium chloride method and XRD (X-Ray Diffraction) analysis. A batch test was conducted on a laboratory scale by shaking zeolitic tuff samples with soil samples in a CaCl2 solution. The solution was then shaken using a magnetic stirrer, and the filtrate was sampled at a specific time interval. The batch test result showed that the zeolite mineral percentage influenced the sorption behavior of zeolitic tuff in the sample and the value of CEC, which the more zeolite mineral and CEC value, the higher of sorption capacity achieved up to 58.8%. Hence, zeolitic tuff investigated in this study has a promising material for the remediation of Pb-contaminated soil in Selogiri, Wonogiri, and Central Java.Di lokasi pertambangan emas di Selogiri, Wonogiri, Jawa Tengah, diketahui telah terjadi pencemaran tanah oleh timbal dan perlu mendapatkan perhatian untuk dilakukan remediasi. Penelitian ini bertujuan untuk bertujuan untuk menginvestigasi karakteristik mineralogi tuf zeolitik dan menganalisis pengaruh karakteristik mineralogi tersebut terhadap efektivitas penjerapan Pb dalam tanah di lokasi pertambangan yang dimaksud. Sampel tanah diambil dari lokasi tambang emas tersebut dan sampel tuf zeolitik pada dua lokasi yang berbeda di Gunungkidul, Yogyakarta, dinamakan sampel A dan sampel B. Sampel tuf zeolitik kemudian dilakukan analisis mineralogi meliputi analisis petrografi dengan menggunakan mikroskop polarisasi, analisis KPK dengan metode Barium Klorida, dan analisis XRD (X-Ray Diffraction). Kemudian, dilakukan uji batch di laboratorium dengan cara sampel tuf zeolitik dihaluskan dan dicampur dengan sampel tanah sebanyak 100 gram dilarutkan dengan menggunakan CaCl2. Kemudian, dilakukan pengadukan dengan menggunakan pengaduk magnetik dan filtrat yang diambil pada interval waktu tertentu. Proses penjerapan zeolit yang dilakukan pada percobaan batch di laboratorium dipengaruhi baik oleh persentase mineral zeolit yang hadir maupun nilai KPK yang dimiliki oleh zeolit sampel. Hasil uji batch menunjukkan bahwa semakin banyak persentase zeolit dan nilai KPK maka efektivitas penjerapan lebih tinggi dan mencapai optimum yang dapat dicapai sebesar 58,8%. Dengan demikian, remediasi Pb dalam tanah tercemar di lokasi pertambangan emas di Selogiri, Wonogiri, Jawa Tengah dapat dilakukan dengan menggunakan tuf zeolitik dari Gunungkidul yang memiliki potensi cukup baik sebagai material remediasi
A Case Study on Experiential Learning in Architecture: Accessible, Climate-Responsive, and Flexible House Designs
Full text link: Architectural education is based on acquiring theoretical and applied knowledge. As a result, experiential learning theory was frequently applied to architecture design courses. As experiential learning refers to gaining knowledge by doing, it allows the students to experience implementing the theoretical knowledge and refine their design solutions by communicating with the teachers. The present study aims to integrate experimental learning in a theoretical course named "Building Information" on housing designs for first-year undergraduate architecture students. After eight weeks of the theoretical lecture period, the students were assigned to design a house using one of the specific approaches, namely accessibility, climate responsiveness, or flexibility. The occupants of the houses were defined, and the students determined their spatial needs. After the critique sessions, the house designs were presented with drawings and analogue models as the final product. Three selected examples from each design approach were evaluated in the study. The results showed that the students gained and implemented theoretical knowledge more efficiently with the integration of experimental learning
Pengaruh Jenis Aerator Dan Media Filter Dalam Menurunkan Kadar Besi (Fe) Air Sumur
Full text linkThe conversion of agricultural land into residential areas will have an impact on the need for clean water which contains various metal contaminants such as iron. One of them is the Randu Housing, Sumberejo Village, Sukodono District, Lumajang Regency, which is one of the many housing estates built from former rice fields. This study aims to analyze the effect of using types of aerators, namely cascade aerators and bubble aerators with a variety of filter media using dune sand and river sand with a discharge of 1 liter/minute. This type of research uses an experimental method which is carried out on a laboratory scale. The results showed the percentage reduction in Fe content in aeration treatment using cascade aerator and bubble aerator was 14,55% and 2,16%, sedimentation treatment was 3.34%, and filtration treatment using dune sand and river sand filter media was 81,85% and 89.13%. The results of the analysis showed that the variables of the cascade aerator, dune sand filter and river sand filter had a significant relationship with the decrease in iron content. While the relationship that does not have a significant effect is the bubble aerator and sedimentation variables.
Keywords: Aeration, Sedimentation, Filtration and Iron (Fe)Alih fungsi lahan pertanian menjadi pemukiman penduduk akan berdampak pada kebutuhan air bersih yang mengandung berbagai kontaminan logam seperti besi. Salah satunya pada Perumahan Randu, Desa Sumberejo, Kecamatan Sukodono, Kabupaten Lumajang merupakan salah satu dari sekian banyak perumahan yang dibangun dari lahan bekas sawah. Penelitian ini bertujuan menganalisis pengaruh penggunaan jenis aerator, yaitu cascade aerator dan aerator gelembung dengan variasi media filter menggunakan pasir gumuk dan pasir sungai dengan debit 1 liter/menit. Jenis penelitian ini menggunakan metode eksperimental yang dilaksanakan dalam skala laboratorium. Hasil penelitian menunjukkan persentase penurunan kadar Fe pada pengolahan aerasi dengan menggunakan cascade aerator dan aerator gelembung sebesar 14,55% dan 2,16%, pengolahan sedimentasi sebesar 3,34%, dan pengolahan filtrasi dengan menggunakan media filter pasir gumuk dan pasir sungai sebesar 81,85% dan 89,13%. Hasil analisis didapatkan bahwa variabel cascade aerator, filter pasir gumuk dan filter pasir sungai memiliki hubungan yang berpengaruh secara signifikan terhadap penurunan kadar besi. Sedangkan hubungan yang tidak berpengaruh secara signifikan yaitu variabel aerator gelembung dan sedimentasi.
Kata kunci: Aerasi, Sedimentasi, Filtrasi dan Besi (Fe
Karakteristik Bakteri Endofit Akar Tanaman Kedelai Penghasil Hormon Tumbuh IAA
Full text linkThe increase in soybean production and productivity has become a significant focus in the effort to meet global food demands. The use of environmentally friendly agricultural technologies and practices is a vigorously pursued strategy. Endophytic bacteria are one of the potential bioagents that can stimulate plant growth. The ability of endophytic bacteria to synthesizing the plant hormone indole-3-acetic acid (IAA) can be an alternative in the effort to enhance soybean plant productivity and ensure long-term agricultural sustainability. The objective of this study is to analyze diversity and ability of endophytic bacteria isolated from soybean roots to produce IAA. This research was conducted through several stages, including the isolation of endophytic bacteria from soybean root, evaluating the isolates' ablity for IAA production, and characterizing potential isolates based on macroscopic and microscopic characteristics. This research indicated that a total of 11 endophytic bacteria isolates were obtained from soybean plant roots. Among them, four isolates, namely EAK4, EAK5, EAK6, and EAK8, demonstrated the capability to synthesizing IAA ranging from 35.46 to 44.56 ppm. These isolates showed various macroscopic and microscopic characteristics and hold promise as biological agents that promote planth growth
Stabilisasi merkuri pada limbah tambang dengan menggunakan zeolit alam
Full text linkMercury contamination caused by artisanal gold mining waste would become an environmental problem if there were no remediation actions. This study aimed to investigate the ability of natural zeolite obtained from Gunungkidul Yogyakarta to stabilize mercury in mining waste or tailing. Tailing samples were obtained from three locations on Kulon Progo, Wonogiri, and Banyumas, and the natural zeolite sample was obtained from Gunungkidul, Yogyakarta. The batch experimental study was conducted to test the ability of the effectiveness of natural zeolite in stabilizing mercury in tailing. The result of the study shows that the natural zeolite used in the experimental study can be used to reduce the mercury concentration in tailing. The natural zeolite's ability for stabilization varies and depends on the initial mercury concentration in tailing and the natural zeolite dose.Pencemaran merkuri yang disebabkan oleh limbah tambang emas tradisional menjadi salah satu masalah lingkungan yang berdampak serius jika tidak dilakukan penangangan. Penelitian ini bertujuan untuk menginvestigasi kemampuan zeolit alam yang diperoleh dari Gunungkidul Yogyakarta untuk menstabilisasi merkuri yang terdapat pada limbah tambang emas tradisional atau tailing. Sampel tailing diambil dari tiga lokasi di Kulon Progo, Wonogiri dan Banyumas, sedangkan sampel zeolit alam diambil dari Gunungkidul, Yogyakarta. Percobaan batch dilakukan pada skala laboratorium untuk menguji efektifitas zeolit alam dalam menstabilisasi merkuri dalam tailing. Hasil penelitian menunjukkan bahwa zeolit alam yang digunakan dapat menurunkan konsentrasi merkuri dalam tailing. Kemampuan stabilisasi yang dimiliki oleh zeolit bervariasi tergantung pada konsentrasi awal merkuri pada tailing dan dosis zeolit alam yang ditambahkan. 
Isolasi dan Karakterisasi Mikroorganisme Endofit Akar Ginseng Jawa (Talinum paniculatum Gaertn.) Yang Diberi Perlakuan Perbedaan Ketersedian Air
Full text linkA medicinal plant known as Java ginseng (Talinum paniculatum Gaertn.) may thrive in a variety of water availability situations. The quantity of endophytic bacteria a plant contains affects its capacity to survive in stressful environments. The objective of this study was to identify and separate endophytic bacteria from Javanese ginseng roots that had undergone various water availability treatments. A description method was utilized, in which isolated isolates were given morphological descriptions, assessed for similarity indexes, and then categorized. Endophytic microbe abundance and diversity varied according to this study, but plants treated with water scarcity displayed higher abundance and diversity. While endophytes of plant origin treated with 60% field capacity (FC) had the maximum diversity, root samples treated with 80% (FC) had the highest microbial abundance. Ten species groupings were created from the 42 isolated isolates based on a coefficient value of > 70%
Penentuan Tipe Inhibisi Senyawa Analog Kurkumin CA2 terhadap Enzim α-Glukosidase dari Beras Lapuk
Full text linkDiabetes is a health problem that exists throughout the world, especially in Indonesia. Based on data compiled from the International Diabetes Federation (IDF) in 2017, people with diabetes in Indonesia reached 10.3 million people, and if not handled properly it is suspected that there will be an increase to 21.3 million people in 2030. Curcumin analog compounds can used for the treatment of diabetes by inhibiting the enzyme α-glucosidase. The curcumin analog compound used in this study was synthesized from 4 methoxybenzaldehyde with cyclopentanone which was then called the CA2 compound. The α-glucosidase enzyme used in this study was obtained through extraction of weathered rice with an optimum pH of 4.5 and the enzyme extract fraction used was fraction II which had the highest activity compared to fractions I and III. The results showed that the values of the kinetic parameters Km and Vmax of the extracted α-glucosidase enzyme were 1.53 mM and 0.03 U/mL, respectively. The Km kinetic parameter value changed to 1.66 Mm while the Vmax value did not change when the α-glucosidase enzyme was inhibited by CA2 compound, so that the type of inhibition shown by CA2 compound was competitive
Assessment of sustainability of lobster fisheries in Dampar Beach, Lumajang Regency, East Java, Indonesia
Full text linkDampar Beach is one of the area in Lumajang which has abundant fisheries resources and lobster is one of export commodities. Nowadays, increased trade and local market demand led to an increase in lobster sales and will lead to a decrease in lobster stocks. Therefore, a sustainability analysis is needed in managing these fishery resources. This study aims to determine the level of sustainability of lobster fisheries in Dampar Beach, Lumajang in four dimensions, i.e. economic, social, ecological, and technological dimension. The sustainable management strategy of lobster fisheries also determined and discussed. The research method for the analysis of sustainability status uses RAPFISH (Rapid Appraisal for Fisheries Sustainability). This type of research uses a descriptive method with a quantitative approach. The results showed that the sustainability index value of the economic and technology dimension are 39.29% and 48.79%, respectively (less sustainable). The social and ecological dimension are 60.44% and 50.72%, respectively (enough sustainable). The strategies for lobster fisheries at Dampar Beach, Lumajang should focus more on attributes that have high leverage, especially on the social, economy, and ecology dimensions. The utilization of lobster resources in a sustainable manner is basically the goal of management which guarantees the level of resource utilization that does not damage or exceed its recovery capacity, so that it can serving the living needs of present and future generations