Kayeli Bay is a water in Buru Regency which has very important value in terms of ecological and economic functions. During its development, the ecosystem in Kayeli Bay bears the burden of pollution, especially heavy metal mercury as a result of the people's gold mining on Buru Island which uses Hg to get pure gold. Hg can accumulate in the environment, especially deposited in the sediments in Kayeli Bay waters. Mangrove plants that generally grow in estuary and coastal environments are a place for sediment accumulation. This plant has the ability to absorb and accumulate heavy metals, one of which is R. mucronata. This study aims to analyze the concentration of heavy metal Hg in mangroves of R. mucronata and sediments, and to analyze the bioaccumulation of heavy metal Hg in R. mucronata in Kayeli Bay, Buru Regency. Samples were taken from 3 stations, namely the Anahoni River Estuary (Station I), the Wailata River Estuary (II Station) and the Waeapo River Estuary (III Station). Each station has 2 sampling points (replicates). Determination of the concentration of Hg metal in the sample using the CV AAS method. The average value of Hg concentration in the roots was higher than the bark and leaves of the mangrove R. mucronata, but the concentration was lower than the sediment and was still below the critical value of Hg for plants. The average value of sediment Hg concentration is still below the sediment quality standard. In this study, R. mucronata mangroves were excluder and phytostabilized, where there was a limitation on the absorption of heavy metal Hg from water and sediment and the most Hg accumulation was found in the roots. Keywords: Bioaccumulation, Mercury, Rhizophora mucronata, Kayeli Bay
The clove leaves are part of the clove plant which rarely used, and if you look at them, the clove leaves have active compounds that can be functioned as antibacterials. Meanwhile, Virgin Coconut Oil or called VCO, is processed from coconut milk as the essential ingredient, and if it is not processed correctly, VCO will usually have a short shelf life or can be damaged quickly. This study aims to determine the quality of VCO by adding clove leaves in its processing. Based on the results of the study, it can be seen that the quality of VCO with the addition of clove leaves for the indicator of water content and the free fatty acid number is not following the Indonesian National Standard (SNI). In contrast, the indicator for the VCO peroxide number with a mixture of clove leaves has good quality according to the SNI standard. Based on the results of the study, it can be seen that the quality of VCO with the addition of 100 grams of clove leaves for indicators of water content and fatty acid numbers, namely 2.9% and 0.69%, is high or above the SNI standard limit. In comparison, the quality of VCO with the addition of 100 grams of clove leaves with indicators a peroxide value of 0.7 mg ek/ kg or less than 2 mg ek/kg has good quality based on Indonesian National Standard. Keywords: Quality, VCO
Latar Belakang: Para penambang emas di pulau Buru menggunakan bahan kimia berbahaya seperti merkuri, dimana limbah dari hasil penambangan akan mengalir hingga ke lautan dan menyebabkan biota laut tercemar merkuri sehingga perlu selalu dipantau kualitas airnya, karena sangat berdampak bagi ksehatan dan juga lingkungan. Tujuan penelitian ini sebagai rujukan pemerintah dalam pembuatan peraturan daeraha mengenai lingkungan.Metode: Penelitian ini termasuk dalam kategori penelitian lapangan, yaitu data diambil langsung dari sampel dan dianalisis di laboratorium. Indikator terdiri dari analisis fisik, kimia dan biologi dari sampel air sungai dan laut kemudian dideskripsikan.Hasil: Dari hasil analisis laboraturium menunjukan bahwa parameter fisik TDS yang dihasilkan tidak sesuai dengan baku mutu yaitu: Sungai Waelata, Sungai Anahoni, Sungai Kayeli, Laut Teluk Kayeli. Parameter kimia nilai BOD tidak sesuai dengan baku mutu yaitu: Sungai Waeapo, Sungai Waelata, Sungai Anahoni, Sungai Kayeli. Untuk parameter biologi tergolong seuai baku mutu. Wilayah pengamatan yang memiliki nilai kualitas perairan yang kurang baik dibandingkan dengan wilayah lainnya adalah Sungai Anahoni dengan tujuh parameter tidak sesuai baku mutu (suhu, TSS, TDS, kekeruhan, DO, BOD dan COD), Sungai Kayeli memiliki enam parameter tida sesuai dengan baku mutu diantaranya TDS, pH, phosfat, DO, BOD dan COD), Sungai Waelata dengan lima parameter tidak sesuai dengan baku mutu (suhu, TDS, TSS, kekruhan dan BOD).Simpulan: Dari nilai parameter fisik, biologi, dan kimia terlihat bahwa sebagaian besar telah memenuhi baku mutu yang telah ditetapkan, sehingga masih dapat digunakan sesuai dengan fungsinya, namun masih terdapat beberapa parameter yang tidak sesuai denganbaku mutu. ABSTRACT Title: Comparative Analysis of Water Quality that empties into the Waters of Kayeli Bay as the Impact of Illegal MinersBackground: Gold miners on Buru Island use hazardous chemicals such as mercury, whereby the waste from mining will flow into the ocean and cause marine creatures to be polluted with mercury so that the water quality needs to be monitored constantly, because it has a huge impact on health and also the environment. The purpose of this research is as a reference for the government in making regional regulations regarding the environment.Methods: This research is included in field research, where the data is taken directly from the sample and analyzed in the laboratory. The indicators consist of physical, chemical and biological analysis of river and sea water samples which are then described.Results: The results of laboratory analysis show that the physical parameters of the TDS produced are not in accordance with the quality standards, namely: Waelata River, Anahoni River, Kayeli River, Kayeli Bay Sea. The chemical parameter BOD values do not comply with the quality standards, namely: Waeapo River, Waelata River, Anahoni River, Kayeli River. For biological parameters classified according to quality standards. The observation area that has poor water quality values compared to other areas is the Anahoni River with seven parameters not in accordance with quality standards (temperature, TSS, TDS, turbidity, DO, BOD and COD), Kayeli River has six parameters not in accordance with quality standards including TDS, pH, phosphate, DO, BOD and COD), the Waelata River with five parameters not in accordance with quality standards (temperature, TDS, TSS, turbidity and BOD).Conclusion: From the values of the physical, biological and chemical parameters it can be seen that most of them have met the quality standards that have been set, so they can still be used according to their function, but there are still some parameters that are not in accordance with the quality standards.
The Presence of Podcasts is such an interesting technology to facilitate language learner development. The online or offline accessibility through a smartphone or laptop offer convenience, learning anytime and everywhere. The Audios and videos enable students for their learning accelerations .This study aimed to study the influence of podcasts as technology for Students’ English Vocabulary mastery, and to investigate the students’ responses towards podcasts. This research employed quantitative research with a quasi-experimental design. The Participants were 60 Students of SMA Negeri 2 Buru grade XII IIS, Namlea, Buru , Maluku Province. Data related to student’s vocabulary mastery were collected by implementing pre-test, post-test, and distributing questionnaires to find out students' responses towards the use of Podcast Technology. Pre-test and post-test were conducted for .The 60 participants were then classified into 30 Students of Experimental Group. Moreover, 30 Students of Control Group .The data collected were then analyzed using IBM SPSS. The mean score resulted from the experimental group were 52.83 in the pretest and reached 63.83 in the Post Test, while the mean score resulted from Control Group were 50.5 in the Pre-Test and 55.33 in Post Test. The results indicated that the vocabulary mastery of the students in both groups was developed, however the experimental group, which implemented podcast, showed the higher improvement than non-podcast. The difference score between both groups was 8.5. The students also showed the positive responses toward the utility of podcast in teaching and learning processes.
AbstrakPulau Buru merupakan salah satu pulau penambangan emas dan banyak dilakukan secara illegal dengan melibatkan penggunaan merkuri untuk alat bantu dalam proses ekstraksi emas melalui proses amalgamasi. Merkuri merupakan bahan kimia yang berbahaya dan bersifat toksik bagi manusia dan juga lingkungan, dan dampak dari penggunaan merkuri ini telah dirasakan oleh masyarakat setempat. Penelitian ini bertujuan untuk memperoleh bakteri yang resisten terhadap merkuri sehingga dapat digunakan dalam proses bioremediasi. Penelitian ini merupakan penelitian skala laboratorium dan dianalisis secara deskriptif. Hasil penelitian ini yaitu dari kedua lokasi pengambilan sampel diperoleh 17 isolat dengan morfologi yang berbeda-beda serta dari ke-17 isolat tersebut resisten terhadap merkuri.AbstractBuru Island is one of the gold mining islands and much of them are illegally that used mercury in gold extraction using uses mercury. Mercury is a chemical that is harmful and toxic to humans as well as the environment, and recently the impact of mercury use has been found by the local community. This study aims to obtain bacteria that are resistant to mercury so that it can be used in the bioremediation process. This research is a laboratory scale research and analyzed descriptively. The results of this study, namely from the two sampling locations obtained 17 isolates with different morphologies and from the 17 isolates were resistant to mercury.
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