TY - JOUR
T1 - Recycling of iron-rich sediment for surface modification of filters for underground water deironing
AU - Romanovski, Valentin
AU - Romanovskaia, Elena
AU - Moskovskikh, Dmitry
AU - Kuskov, Kirill
AU - Likhavitski, Vitaly
AU - Arslan, Mehmet Faruk
AU - Beloshapkin, Sergei
AU - Matsukevich, Irina
AU - Khort, Alexander
N1 - Publisher Copyright:
© 2021 The Authors.
PY - 2021/8
Y1 - 2021/8
N2 - Groundwater is one of the cleanest natural sources of drinking water available, which, at the same time, often requires deironing - removal of the dissolved iron ions - before the water could be used. In this paper, there are describe the preparation, characterization, and deironing properties of surface-modified refractory chamotte granules, used as active components of fillers for deironing filters. For this research, chamotte surface modification was made by solution combustion synthesis (SCS) approach of an aqueous solution of synthetic iron nitrate and citric acid with the different iron-to-chamotte ratios. An iron-rich precipitate from deironing filters was used as a source of iron for the preparation of a precursor solution. Obtained materials were characterized using diffraction, spectroscopic and microscopic methods. The SCS modification resulted in the formation of layers of hematite Fe3O4 nanocrystallites of ~5-15 nm on the surface of refractory chamotte granules. It was shown the effect of the dose of iron nitrate on the absorbed iron oxide species content on the surface of the modified chamotte granules and its influence on the surface and operational characteristics. Pilot-plant deironing tests showed that an increase in the concentration of iron on the chamotte granules surface from 5.8 wt% for unmodified samples, to 19.0, 48.7, and 55.8 wt% for the modified ones, led to the respective increase in the deironing efficiency from 41% to 65%, 73% and 78%, respectively.
AB - Groundwater is one of the cleanest natural sources of drinking water available, which, at the same time, often requires deironing - removal of the dissolved iron ions - before the water could be used. In this paper, there are describe the preparation, characterization, and deironing properties of surface-modified refractory chamotte granules, used as active components of fillers for deironing filters. For this research, chamotte surface modification was made by solution combustion synthesis (SCS) approach of an aqueous solution of synthetic iron nitrate and citric acid with the different iron-to-chamotte ratios. An iron-rich precipitate from deironing filters was used as a source of iron for the preparation of a precursor solution. Obtained materials were characterized using diffraction, spectroscopic and microscopic methods. The SCS modification resulted in the formation of layers of hematite Fe3O4 nanocrystallites of ~5-15 nm on the surface of refractory chamotte granules. It was shown the effect of the dose of iron nitrate on the absorbed iron oxide species content on the surface of the modified chamotte granules and its influence on the surface and operational characteristics. Pilot-plant deironing tests showed that an increase in the concentration of iron on the chamotte granules surface from 5.8 wt% for unmodified samples, to 19.0, 48.7, and 55.8 wt% for the modified ones, led to the respective increase in the deironing efficiency from 41% to 65%, 73% and 78%, respectively.
KW - Deironing
KW - Filter load
KW - Recycling
KW - Refractory chamotte
KW - Solution combustion synthesis
KW - Underground water
UR - http://www.scopus.com/inward/record.url?scp=85106872197&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2021.105712
DO - 10.1016/j.jece.2021.105712
M3 - Article
AN - SCOPUS:85106872197
SN - 2213-3437
VL - 9
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 4
M1 - 105712
ER -