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All Journal Jurnal Kimia (Journal of Chemistry) Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
I Gede Andy Andika Parahita
Universitas Udayana
Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences

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EKSTRAKSI DAN KARAKTERISASI HIDROKSIAPATIT DARI LIMBAH KERAJINAN TULANG SAPI MENGGUNAKAN METODE KOMBINASI ALKALI HIDROTERMAL DENGAN DEKOMPOSISI TERMAL I Gede Andy Andika Parahita; I Nengah Simpen; Ni Gusti Ayu Made Dwi Adhi Suastuti
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 2 Juli 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (221.78 KB) | DOI: 10.24843/JCHEM.2016.v10.i02.p09

Abstract

Penelitian ini bertujuan untuk mengekstraksi hidroksiapatit dari limbah kerajinan tulang dan mengkarakterisasinya. Metode yang digunakan adalah metode kombinasi alkali hidrotermal dengan dekomposisi termal, yang dilakukan dengan cara menginteraksikan serbuk tulang dengan NaOH 5% dan dikalsinasi pada suhu 400, 750, 950 dan 1100oC (TB1, TB2, TB3 dan TB4). Nilai yield hidroksiapatit  rata-rata yang dihasilkan adalah 68,82%. Karakterisasi kebasaan permukaan tertinggi dimiliki TB1 adalah 2,8345 ± 1,5166 x 10-2 mmol/gram. Karakterisasi FTIR menghasilkan gugus fungsi yang sesuai dengan senyawa hidroksiapatit. Luas permukaan tertinggi dimiliki TB1 adalah 34,4811 m2/gram. Perbandingan Ca/P rata-rata yang didapatkan adalah 1,6838. Karakterisasi XRD menunjukkan penambahan suhu mengakibatkan puncak difraksi yang dihasilkan semakin tajam yang menunjukkan struktur kristal yang dihasilkan semakin tajam.  
Assessment of Surface Water Quality Status Using the Pollution Index Method in Tukad Badung River Kadek Diana Harmayani; Ni Made Pertiwi Jaya; Ida Ayu Rai Widhiawati; I Gede Andy Andika Parahita; Ngakan Gede Agung Khrisna Wiryananda; Ni Nyoman Dewi Supriyani; Daniel Rizal Mahendra; I Gusti Agung Gede Wiranata Baskhara; Debora Sofia Fransiska Hutagalung
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 1 (2023): March 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i1.175-185

Abstract

This research proposes to find out the present state of the water's purity in Tukad Badung through an examination of the Pollution Index (PI) adopted from the methodology presented by the Water Quality Index (WQI), which was presented by the Indonesian Ministry of Environment. A series of water samples were taken at three river flow points in the Denpasar City area, representing the upstream, middle, and downstream areas. The water quality parameters were determined based on the characteristics of domestic wastewater pollutant sources that are identified in watershed areas. In accordance with Regulation 22 of the Government of 2021 concerning quality standards for river water used for drinking water, the average concentrations of Total Suspended Solid (TSS), Ammonia, Biological Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) parameters have exceeded quality standards. Meanwhile, the oil and grease parameter, as well as detergents, still meet quality standards. The PI at three monitoring points was obtained at 2.41 – 4.27, categorized as lightly polluted. In the future, efforts to deal with water pollution are critical to meet the downstream water quality standards used as drinking water.
Co-Authors Daniel Rizal Mahendra Debora Sofia Fransiska Hutagalung I Gusti Agung Gede Wiranata Baskhara I Nengah Simpen Ida Ayu Rai Widhiawati Kadek Diana Harmayani Ngk. Gd. A. Khrisna Wiryananda Ni G. A. M. Dwi Adhi Suastuti Ni Made Pertiwi Jaya Ni Nyoman Dewi Supriyani