Berenyok river is one of the water sources in Tanjung Karang, Mataram city, categorised as Class 2 for its designation. Thus, preserving the quality of water in the Berenyok river is crucial. This study aims to determine the water quality, calculate the Pollution Index (PI), and set control strategies for the Berenyok river. The study uses quantitative methods such as laboratory analysis for the water quality and PI calculation using a formula based on the Decree of the Minister of Environment No.115/2003 on determining water quality status. Meanwhile, the Strengths, Weakness, Opportunities, and Threats (SWOT) analysis generates recommendations for water pollution control strategies. The sampling locations are located in two sampling points (upstream and downstream of the Berenyok river) during bright daylight and the river's normal flow. Based on analysis results, the Berenyok river is defined as lightly polluted as the concentrations of several chemical parameters exceed the maximum limit, such as BOD, and PO3-P. It is also verified by high concentration of total coliform, namely 540,000 MPN/100mL (upstream) and 1,600,000 MPN/100mL (downstream). Thus, recommendations for water pollution control strategies are substantial for the Berenyok river.
In this research, have perfomed the synthesis of chitosan from crab shell waste as a Chitosan/Zeolite (Ch-Z spherical) composite to reduce water hardness. The synthesis of chitosan can be done in three stages, namely demineralization, deproteination, depigmentation, and deacetylation. The stages of Chitosan/Zeolite Spherical (Ch-Z Spherical) synthesis were made with variations in the weight of chitosan: zeolite (w /w) 1: 0.5; 1: 1; 1:1.5 using Crosslinking Sodium tripolyphospat. The characterization results by using FT-IR for chitosan-zeolite weight variations at wavelengths of 4000-450 cm-1 show a typical IR spectrum for chitosan / zheolite Spherical (Ch-Z Spherical) successively at wavelengths of 1639 cm-1, 1638 , 71 cm-1, and 1638.58 cm-1 which is the -C⁼N strain or structural change (deformation) of NH2. The chitosan-zeolite spherical (Ch-Z spherical) composite was applied to reduce the metal Ca (II) and Mg (II) which can cause hardness in water. The effectiveness of 0.5 gram Ch-Z Spherical composites, we tested the variation of composite weights 0.1, 0.2, 0.4, 0.6, 0.8, and 1.2 gr as adsorbents of Ca (II) metal ) and Mg (II) with a concentration of 1000 ppm in 1 hour with the stirring process. The results obtained by a decrease of 99.69% at a weight of 0.6 grams and experienced constant along with an increase in the mass of adsorbent. While the effectiveness of the Spherical Ch-Z composite in reducing the concentration of Mg (II) by 99.4% in a weight variation of 1.2 gr. This shows the formation of active sites contained in the Spherical Ch-Z composite. Metal adsorption capacity of Ca (II) and Mg (II) obtained in this study amounted to 498 mg/g and 23.7 mg /g
Saat ini volume sampah yang tinggi di Kota Mataram merupakan salah satu permasalahan yang sangat serius. Berdasarkan data yang diperoleh, sampah yang tidak terangkut di Kota Mataram berjumlah 37%. Permasalahan sampah juga terjadi di Universitas Nahdlatul Ulama NTB yang merupakan Universitas swasta dengan 4 Fakultas dan 10 Program studi. Sampai saat ini Universitas Nahdlatul Ulama NTB tidak melakukan pengelolaan sampah dan masih membuang sampah ke TPA.Tanpa adanya pengelolaan sampah yang baik, volume sampah di Universitas Nahdlatul Ulama NTB cenderung bertambah seiring meningkatnya aktivitas dan jumlah penghuni kampus.Hal ini tentu akan mengakibatkan meningkatnya tumpukan sampah di wilayah kampus yang dapat menimbulkan berbagai dampak kesehatan lingkungan seluruh penghuni kampus. Penelitian ini bertujuan untuk menganalisis timbulan dan karakteristik sampah kegiatan akademik di Universitas Nahdlatul Ulama NTB.Sebagai salah satu dasar dalam pengelolaan sampah yang berkelanjutan di Universitas Nahdlatul Ulama NTB.Hasil penelitian menunjukkan bahwa Universitas Nahdlatul Ulama NTBmasih menggunakan sistem angkut lalu dibuang.Rata-rata volume sampah yang dihasilkan kampus per hari adalah2.746, 25m3 / hari.
Geographically, geology, geomorphology, hydro-meteorology and socio-culture-economy Indonesia is a disaster-prone country. Almost every region in Indonesia is prone to disasters. Not only natural disasters such as earthquakes, tsunami, floods, landslides, droughts or tornadoes can occur, but also social disasters such as social conflicts, fires, disease outbreaks and technological failures. Disaster events have a significant impact on people's survival. Causing losses both morally and materially, including causing food security to be disrupted. When disasters, food availability can be reduced while the needs of post-disaster communities are increasing. Awareness of the importance of maintaining food security is one step in disaster mitigation activities. Good food management can help people recover faster after a disaster. This is what is done by Gumantar Village people in North Lombok Regency who have done food management well. The Gumantar community with rice barn, Pegawe Gumi, and mutual cooperation succeeded in passing through disasters that threatened food security. The granary structure that is the residence of Gumantar people makes them able to store food for a long time. Special rituals carried out for agriculture are also routinely carried out, namely Pegawe Gumi ritual. This good food management makes the Gumantar community able to survive after the Lombok earthquake 2018 or during a famine, without waiting for help from volunteers/donors. Adaptation of the Gumantar community through local wisdom that has always been maintained has increased their capacity in the face of disasters. Therefore, Gumantar community has been able to reduce the risk of disasters that might occur around them
Jakarta adalah ibu kota Negara Indonesia, secara geografis terletak di 60 12 'Lintang Selatan dan 1060 48' Bujur Timur. Sebagai ibukota Negara, Jakarta tidak kebal dari ancaman bencana. Diperlukan langkah yang tepat untuk meminimalkan kerugian yang mungkin ditimbulkan oleh sejumlah potensi bencana yang dapat terjadi di Jakarta. Salah satu langkah yang dapat dilakukan adalah melakukan penilaian risiko multi bencana, sebagai langkah awal untuk membantu manajemen bencana. Metode yang digunakan dalam studi penilaian risiko multi bahaya adalah modifikasi dari metode yang dikembangkan oleh Stefan Greiving (2006). Penilaian risiko multi bencana yang telah dilakukan menghasilkan peta risiko terintegrasi. Penilaian risiko terpadu multi bencana mencakup empat elemen yaitu peta bencana, peta bencana berisi informasi tentang jenis-jenis bencana yang mungkin terjadi. Dari peta bencana kemudian dibuat peta bahaya terintegrasi. Setelah itu dianalisis kerentanan wilayah dan ditampilkan sebagai peta kerentanan. Peta kerentanan disusun berdasarkan informasi paparan lokasi terhadap bencana, dan berdasarkan kapasitas lokasi. Analisis terakhir adalah membuat peta risiko terintegrasi yang berisi kombinasi peta bencana terintegrasi dan peta kerentanan. Analisis telah dilakukan sehingga menghasilkan distribusi spasial kejadian multi-bencana, multi-kerentanan, dan peta risiko terintegrasi di wilayah Jakarta. Peta risiko terintegrasi yang dihasilkan menunjukkan bahwa wilayah berisiko tinggi berada di utara dan barat Jakarta. Sementara itu risiko bencana yang rendah ada di wilayah timur dan selatan Jakarta
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