Sintesis pigmen geothit (α-FeOOH) dari limbah industri kerajinan besi dengan metode presipitasi

Nisa, Choirun, Aini, Nur and Khoiroh, Lilik Miftahul (2019) Sintesis pigmen geothit (α-FeOOH) dari limbah industri kerajinan besi dengan metode presipitasi. Alchemy, 7 (2). pp. 40-45. ISSN 2460-6871

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Abstract

Iron handicraft is one of industries that process iron ore into handicraft products and produce lathe waste. Iron lathe contains 96.08% iron metal which is potential source as a precursor for synthesis of goethite pigment. The method used for synthesis was precipitation using NaHCO3 as precipitator agent. Synthesis was conducted at 70°C with variations of stirring speed such as 550, 650, 750 and 850 rpm. The products were characterized by color reader, ultraviolet-visible (UV-Vis) spectroscopy, XRD and SEM-EDX. The data from color reader showed that the highest yellowness degree and lightness obtained at a stirring speed 550 rpm were 24.1 and 42.1, respectively. UV-Vis data showed that the maximum wavelength of goethite pigment was 600-624 nm. Based on XRD data, synthesized pigment was in goethite phase (α-FeOOH) for all samples with crystallite size 63.24 nm and the highest crystallinity was achieved at 550 rpm. SEM-EDX data showed that morphology pigment (α-FeOOH) was not uniform, there were impurities such as Na and C.

Item Type:	Journal Article
Keywords:	lathe waste; precipitation; goethite; pigment
Subjects:	03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030203 Inorganic Green Chemistry
Divisions:	Faculty of Mathematics and Sciences > Department of Chemistry
Depositing User:	lilik miftahul khoiroh
Date Deposited:	28 Nov 2020 03:37

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