TITLE:
Characterisation and Valorisation of the Moroccan Diatomite
AUTHORS:
Bahaj Hanane, Rahmouna Jihad, Berry Naima, Targhi Soukaina, Barhoun Nadia, Bachiri Taoufiq Naima
KEYWORDS:
Diatomite, Morocco, Physico-Chemical Characteristics, Thermogravimetric Analysis
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.2,
February
28,
2022
ABSTRACT: Morocco
is known for the diversity of its natural resources. In particular, the mineral
substances, diatomites, material relatively abundant but poorly exploited in
Morocco. The aim of this work is to determine the geochemical and textural characteristics of the
different diatomite deposits of north-eastern Morocco in order to compile a
database with the different properties of these sediments. These data are
valuable to guide the use and exploitation of this natural georesource. Samples
from 3 deposits were characterised by different techniques of analysis:
sedimentological (granulometry, calcimetry), chemical (pH, X-ray diffraction, infrared
spectrometry and transmission electron microscopy coupled with EDX). We also performed
thermogravimetric analysis of some samples. Results revealed that diatomite is a fine,
moderately refractory material with a basic pH. While, the CaCo3 content varies between different deposits. It is composed mainly of silica and
has a well-developed porosity. In addition, thermogravimetric analysis revealed
a loss of mass with temperature increase. A moderate variation in the chemical
composition of the diatomite was observed from one deposit to another.
Generally, we can stipulate that the diatomite from the Rif deposit is
relatively a good quality. It has relatively the same physico-chemical
properties as the neighbouring regions.