Open AccessEco-valorification of marine shells by hydrothermal conversion in alkaline media
Author(s) -
Alexandra Ioana Bucur,
Radu Banica,
M. C. Pascariu,
Maria Poienar,
Cristina Mosoarca,
Raul A. Bucur,
A. Negrea,
I. Hulka
Publication year - 2022
Publication title -
digest journal of nanomaterials and biostructures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.256
H-Index - 44
ISSN - 1842-3582
DOI - 10.15251/djnb.2022.171.153
Subject(s) - hydrothermal circulation , calcination , chemical engineering , hydroxide , calcium hydroxide , materials science , gypsum , hydrothermal synthesis , mineralogy , chemistry , metallurgy , environmental science , engineering , catalysis , organic chemistry
Marine shells are a natural, cheap, abundant and renewable resource, which can be used to produce useful materials, such as for the construction industry. The present study focuses on the transformation of Mya arenaria exoskeletons from the Black Sea into calcium hydroxide by using low-temperature hydrothermal synthesis. In contrast with other methods, this energy-saving process does not involve calcination of shells prior to the hydrothermal treatment. XRD results show the formation of calcium hydroxide with preferential orientation and interesting atypical morphology, which is strongly influenced by the composition of the reaction medium.