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All Journal Jurnal Penelitian Saintek Journal of Sustainability Science and Technology
Farhan Baehaki
Institut Kesehatan Rajawali
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Energy

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English: Bahasa Indonesia Farhan Baehaki; Yasser Wahyudin; Ryzal Perdana; Arlisya Siti Nurfajar; Zidni Irpan Syaripudin
Journal of Sustainability Science and Technology Vol. 1 No. 1 (2021)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/josst.v1i1.2

Abstract

Wells as a source of water that is commonly used by people in Indonesia are very dependent on the conditions of the surrounding environment. The presence of environmental pollution by waste will be very dangerous, especially if the waste contains heavy metals such as Cr(VI). The highly soluble nature of Cr(VI) allows the process of infiltration from the river into the well water. This study aims to analyze the content of Cr(VI) in the well water of residents around the Citarum River. Samples were taken from two areas that have the criteria for the level of pollution and the environment which is dense with industrial activity, with a total of ten wells spread over the area. The concentration measurement was carried out using an atomic absorption spectrophotometer at a wavelength of 357.9 nm. The results showed that the levels of Cr(VI) ion at Location 1 were in the range of 0.014 – 0.022 ppm so that it could still be used for daily activities because it was below the threshold value. At Location 2, there are six wells whose water is still suitable for use because the value of the Cr(VI) ion content is still below the threshold value. Meanwhile, the water in the other four wells contains Cr(VI) ion level that exceeds the threshold value, so it can be said that it is not suitable for daily use.
Analysis of formaldehyde content in salted fish at Ciroyom market, Bandung City, Indonesia Candra Utama; Nurwidiyanto Nurwidiyanto; Farhan Baehaki; Sri Ekawati
Journal of Sustainability Science and Technology Vol. 1 No. 1 (2021)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/josst.v1i1.6

Abstract

Salted fish is one of the processed fish products that are in great demand by the people of Indonesia. This type of preparation has good durability with natural processes. However, there are some cases that use chemicals as preservatives, such as formaldehyde. This study aims to determine the formaldehyde content in salted fish that is traded in the market in Indonesia. This research is descriptive and the sample is taken from Ciroyom Market, Bandung City, Indonesia, randomly. Samples were analyzed qualitatively to observe the physical characteristics of salted fish. In addition, quantitative analysis was also carried out to determine the level of formaldehyde present in salted fish using a UV-Vis spectrophotometer at a wavelength of 520 nm. The results of the analysis showed that 4 of the 15 samples tested contained formaldehyde with a concentration of 0.033 – 0.482 ppm. The characteristics of these samples physically also have similarities with the characteristics of fish containing formaldehyde, namely bright white and hard textured.
PEMANFAATAN AMPAS DAUN TEH PADA PROSES BIOSORPSI LOGAM BERAT Cr(VI) PADA AIR SUNGAI CITARUM Suci Rizki Nurul Aeni; Farhan Baehaki; Syifa Zayna Muwahiddah
Jurnal Penelitian Saintek Vol 27, No 2 (2022)
Publisher : Directorate of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v2i27.52841

Abstract

Limbah Cr(VI) dapat mengganggu kesehatan karena bersifat toksik, maka perlu dilakukan pengolahan air sungai terlebih dahulu. Salah satu Teknik pengolahan alternatif yaitu menggunakan metode biosorpsi dengan biosorben ampas daun teh. Namun hasil penyerapan itu tergantung oleh beberapa faktor salah satunya yaitu waktu kontak. Tujuan penelitian ini untuk mengetahui waktu kontak optimum terhadap proses biosorpsi Cr(VI) dengan menggunakan biosorben ampas daun teh. Penelitian ini menggunakan metode deskriptif kuantitatif. Sampel yang digunakan air Sungai Citarum yang diambil dari empat titik yaitu di Desa Pangauban, Desa Cilampeni, Desa Nanjung dan Desa Lagadar. Pengukuran kadar dilakukan menggunakan Spektrofotometer UV-Vis pada panjang gelombang 540 nm. Berdasarkan penelitian ini diperoleh waktu kontak optimum yaitu 45 menit dengan presentase penurunan kadar dari masing-masing sampel yaitu 73,25% (Desa Pangauban), 75,94% (Desa Cilampeni), 71,88%, (Desa Nanjung) dan 74,31% (Desa Lagadar). Oleh karena itu, waktu kontak merupakan faktor yang perlu diperhatikan dalam proses biosorpsi untuk pengolahan limbah logam berat Cr(VI). Pemanfaatan ampas daun teh pada proses biosorpsi logam berat Cr(VI) pada air sungai CitarumCr(VI) waste can interfere with health because it is toxic, so it is necessary to treat river water first. One alternative treatment is using the biosorption method with tea leaf dregs biosorbent. However, the absorption results depend on several factors, one of which is contact time. The purpose of this study was to determine the optimum contact time for the biosorption process of Cr(VI) using tea leaf dregs biosorbent. This study used a quantitative descriptive method. The samples used were Citarum River water taken from four points, namely in Pangauban Village, Cilampeni Village, Nanjung Village and Lagadar Village. The concentration measurement was carried out using a UV-Vis Spectrophotometer at a wavelength of 540 nm. Based on this study, the optimum contact time was 45 minutes with the percentage reduction in levels of each sample, namely 73.25% (Pangauban Village), 75.94% (Cilapeni Village), 71.88%, (Nanjung Village) and 74, 31% (Lagadar Village). Therefore, contact time is a factor that needs to be considered in the biosorption process for the treatment of Cr(VI) heavy metal waste
Co-Authors Arlisya Siti Nurfajar Candra Utama Nurwidiyanto Nurwidiyanto Ryzal Perdana Sowiyah Sowiyah Sri Ekawati Suci Rizki Nurul Aeni Syifa Zayna Muwahiddah Yasser Wahyudin Zidni Irpan Syaripudin