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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Ilmu Pendidikan Indonesia
Putra, Anak Agung Bawa
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Electrical & Electronics Engineering Mathematics Physics

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REDUKSI KOMPONEN TOKSIK DARI LIMBAH CAIR GARMEN MENGGUNAKAN BIO-ANORGANIK-SORBEN ARANG TULANG Dwi Adhi S, Ni Gusti Ayu Made; Simpen, I Nengah; Putra, Anak Agung Bawa
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 5 No 1 (2017)
Publisher : Graduate Program of Applied Chemistry, Udayana University, Bali-INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.669 KB) | DOI: 10.24843/CK.2017.v05.i01.p03

Abstract

ABSTRAK: Tujuan penelitian ini adalah mempelajari kemampuan adsorpsi arang tulang sapi teraktivasi NaOH 0,4 M untuk menurunkan (reduksi) karakteristik tingkat kekeruhan, COD (chemical oxygen demand), kandungan Cr dan Pb dari limbah garmen yang dibandingkan dengan tanpa aktivasi. Kemampuan adsorpsi arang tulang tanpa dan teraktivasi (bio-anorganik-sorben) terhadap karakteristik limbah tersebut dikaitkan dengan karakterisasi (keasaman permukaan, jumlah situs aktif, gugus fungsi dan luas permukaan spesifik) serta waktu dan volume interaksi optimum. Hasil yang diperoleh bahwa aktivasi arang tulang dengan larutan NaOH 0,4 M dapat meningkatkan karakteristiknya (keasaman permukaan, jumlah situs aktif, intensitas gugus fungsi O-H dan luas permukaan spesifik) dibandingkan dengan yang tanpa aktivasi. Aktivasi NaOH pada arang tulang dapat meningkatkan kemampuan adsorpsi dalam menurunkan tingkat kekeruhan, COD, dan kandungan Cr dan Pb dari sampel limbah cair garmen dibandingkan dengan kemampuan arang tanpa aktivasi. Waktu interaksi optimum yang diperlukan dalam menurunkan karakteristik tingkat kekeruhan dan COD adalah 90 menit, dengan volume interaksi optimum 20 mL. ABSTRACT: The aim of this reseach was to study the adsorption ability of cow bone charcoal activated with 0.4 M NaOH to reduce the turbidity level, the chemical oxygen demand (COD), the Pb and Cr content of garment waste water and to compare with the non-activated ones. The adsorption ability of both activated and non-activated bone charcoal (bio-inorganic-sorbent) was related to their characteristics which are the surface acidity, the active sites, the fuction groups, the specific surface area, the volume and time optimum interaction as well. The result showed that activation can increase the surface acidity, the active sites, the O-H fuction groups intensity and the specific surface area compared with non-activated ones. The activated charcoal significantly reduced the COD and the turbidity level, the Pb and Cr content of garment waste water comparing with the non-activated ones. Time contact optimum to reduce its characteristics is 90 minutes and volume interaction optimum is 20 mL.
UTILIZATION OF CINNAMON BARK (CINNAMOMUM BURMANNI) EXTRACT AS A NATURAL INHIBITOR FOR THE CONTROL OF CORROSION RATE IN IRON METAL Sembiring, Aggryppyne Keyne Oberta; Putra, Anak Agung Bawa; Ratnayani, Oka
Jurnal Ilmu Pendidikan Indonesia Vol 11 No 3 (2023): JURNAL ILMU PENDIDIKAN INDONSIA
Publisher : Program Magister Pendidikan IPA, Program Pascasarjana Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jipi.v11i3.2341

Abstract

Iron is a metal that is very susceptible to corrosion. Corrosion of iron can occur due to reaction with the surrounding environment, causing damage to ferrous metal. The use of organic inhibitors such as cinnamon bark is considered to be able to suppress the corrosion rate, because in the inhibitor there are tannin compounds that are able to form complex compounds with Fe(III) on the metal surface. Bark consists of an tannins, makes this cinnamon bark capable of being an organic inhibitor. The purpose of this riset was to determine the effect of inhibitor concentration and variation of corrosive media on the corrosion rate, and to determine whether cinnamon bark extract had the potential to be used as an inhibitor. The method used is weight loss in which iron is immersed in various corrosive media for 48 hours without the addition of inhibitors and with the addition of inhibitors of 10; 20; 30; 40; 50; 60; 70; 80; 90; and 100 ppm. The highest corrosion rate without the addition of inhibitors occurred in iron immersed in salt media (NaCl 3.5%) of 53.5371 mpy, and the lowest corrosion rate occurred in iron immersed in neutral media (aquadest) of 15.6342 mpy. The corrosion rate also decreases with the increase in the concentration of the added inhibitor. In other words, this cinnamon bark extract has the potential to be used as an organic inhibitor.
Co-Authors Dwi Adhi S, Ni Gusti Ayu Made I Nengah Simpen Oka Ratnayani Sembiring, Aggryppyne Keyne Oberta