Synthesis and characterization of inorganic colour pigment from spent acid

Hai Song Woon, K. Nicklaane, Lay Sheng Ewe, K. P. Lim, I. Ismail, C. Y. Tan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a new method of recycling spent acid from local cold rolling industry into iron oxide pigment that to be applied to the roof tiles. Pickling is a process in which a hot-rolled steel that has rusty scale is dipped into hydrochloric acid prior to further processing. The waste acid contains valuable elements that can be synthesized into iron oxide pigment materials. Through neutralization between a waste acid and three different alkalis namely sodium hydroxide, potassium hydroxide and calcium hydroxide, sludge is formed and further calcined into iron oxide pigment. Colour values include L∗ab∗ were measured using chromameter. X-ray diffraction (XRD) and scanning electron microscopy (SEM) revealed that sodium hydroxide and potassium hydroxide are the suitable alkalis in this study. Calcination at 600°C produced red iron oxide pigment materials with good colour properties.

Original languageEnglish
Title of host publication3rd International Sciences, Technology and Engineering Conference, ISTEC 2018 - Material Chemistry
EditorsJeyashelly Andas, Ramani Mayappan
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735417557
DOIs
Publication statusPublished - 29 Nov 2018
Event3rd International Sciences, Technology and Engineering Conference: Material Chemistry, ISTEC 2018 - Penang, Malaysia
Duration: 17 Apr 201818 Apr 2018

Publication series

NameAIP Conference Proceedings
Volume2031
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Sciences, Technology and Engineering Conference: Material Chemistry, ISTEC 2018
CountryMalaysia
CityPenang
Period17/04/1818/04/18

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Woon, H. S., Nicklaane, K., Ewe, L. S., Lim, K. P., Ismail, I., & Tan, C. Y. (2018). Synthesis and characterization of inorganic colour pigment from spent acid. In J. Andas, & R. Mayappan (Eds.), 3rd International Sciences, Technology and Engineering Conference, ISTEC 2018 - Material Chemistry [020030] (AIP Conference Proceedings; Vol. 2031). American Institute of Physics Inc.. https://doi.org/10.1063/1.5066986