Characterization of Waste Sludge Pigment from Production of ZnCl2

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F21%3A10248007" target="_blank" >RIV/61989100:27360/21:10248007 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27640/21:10248007 RIV/61989100:27710/21:10248007 RIV/61989100:27740/21:10248007

Result on the web

<a href="https://www.mdpi.com/2075-163X/11/3/313" target="_blank" >https://www.mdpi.com/2075-163X/11/3/313</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/min11030313" target="_blank" >10.3390/min11030313</a>

Result language

angličtina

Original language name

Characterization of Waste Sludge Pigment from Production of ZnCl2

Original language description

This study is focused on the treatment of waste sludge from a zinc chloride production in order to prepare iron-rich pigments usable for a production of glazes. In galvanizing plants, yellow waste sludge containing significant amount of ZnO, Cl, and Fe2O3, is formed. This raw waste sludge cannot be used as a pigment in glaze. Therefore, three methods of treating this material were proposed: (a) washing with H2O, (b) calcination at 180 degrees C and washing by H2O, and (c) calcination at 900 degrees C and washing by H2O. These methods helped to reduce Zn and Cl content up to 97%. According to X-ray fluorescence analysis percentage of Fe2O3 increased from similar to 41% to similar to 98%. X-ray power diffraction analysis confirmed the formation of alpha-Fe2O3 (hematite) in the pigment prepared. Scanning electron microscopy with Energy dispersive X-ray analysis showed clusters of rounded particles, and also the change in size of particles after calcination was observed. Particle size, specific surface area, and density measurements together with thermogravimetric and differential thermal analyses were performed. Pigments prepared from the waste sludge were added to transparent glaze in amounts of 1, 5, 10, and 15 wt.%. Pigment-containing glazes were applied by spraying on fired ceramic tiles and then fired at 1060 degrees C. Color of glazes was determined by (Commission Internationale de l&apos;Eclairage) CIE L*a*b* coordinates as colorless, light brown shades, brown-red, brown-yellow, and deep red-brown. Comparison with colors of glazes prepared using commercial pigments was also performed. Waste sludge can be used to prepare pigments and glazes containing pigments as an alternative to commercial products.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20500 - Materials engineering

Project

<a href="/en/project/EF17_049%2F0008426" target="_blank" >EF17_049/0008426: Research on the management of waste, materials and other products of metallurgy and related sectors</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Minerals

ISSN

2075-163X

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

3

Country of publishing house

CH - SWITZERLAND

Number of pages

16

Pages from-to

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UT code for WoS article

000633908000001

EID of the result in the Scopus database

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