Chapter 13
Field Study IV: Arsenic Removal
from Groundwater by Ferrate with
the Concurrent Disinfecting Effect:
Semi-Pilot On-site Application
Monika Heřmánková, Roman Vokáč, Jan Slunský, and Jan Filip
Abstract The effect of ferrates on arsenic removal from groundwater was initially
observed using laboratory tests. Two different sources of groundwater containing an
elevated concentration of As (ca 100 μg/L) were used for the semi-pilot scale testing,
both possessing the potential for drinking water production. Groundwater treated by
ferrates under laboratory conditions proved to meet the requirements for As limits in
drinking water, i.e., 10 μg/L (according to Czech legislation—Public notice
No. 252/2004 Sb.). A prototype of a portable technological unit for an on-site ferrate
application (Fe(IV), Fe(V)) has been constructed to prove on a semi-pilot scale that
ferrates are applicable for production of drinking water. Water flow of 100 L/h, two
sources of groundwater containing arsenic in concentrations ten times exceeding the
limit for drinking water, and ferrates (in the form of commercial ferrate, dosed in
different amounts—5 mg/L, 10 mg/L, 15 mg/L, and 20 mg/L) were used. The quality
of the treated water from both sites was in compliance with the requirements for
drinking water. The minimal dose of commercial ferrates to reach the As limit for
potable water was set to 10 mg/L for the first water source and 15 mg/L for the
second one. Elimination of microbial organisms was achieved even with a lower
dose of commercial ferrates—10 mg/L. The main advantages of the tested
M. Heřmánková (*)
DEKONTA, a.s., Stehelčeves, Czech Republic
AECOM CZ, s.r.o., Praha, Czech Republic
e-mail: hermankova@dekonta.cz
R. Vokáč
AECOM CZ, s.r.o., Praha, Czech Republic
J. Slunský
NANO IRON, s.r.o., Židlochovice, Czech Republic
J. Filip
Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc,
Olomouc, Czech Republic
© Springer Nature Switzerland AG 2020
J. Filip et al. (eds.), Advanced Nano-Bio Technologies for Water and Soil Treatment,
Applied Environmental Science and Engineering for a Sustainable Future,
https://doi.org/10.1007/978-3-030-29840-1_13
299
Field Study IV: Arsenic Removal
from Groundwater by Ferrate with
the Concurrent Disinfecting Effect:
Semi-Pilot On-site Application
Monika Heřmánková, Roman Vokáč, Jan Slunský, and Jan Filip
Abstract The effect of ferrates on arsenic removal from groundwater was initially
observed using laboratory tests. Two different sources of groundwater containing an
elevated concentration of As (ca 100 μg/L) were used for the semi-pilot scale testing,
both possessing the potential for drinking water production. Groundwater treated by
ferrates under laboratory conditions proved to meet the requirements for As limits in
drinking water, i.e., 10 μg/L (according to Czech legislation—Public notice
No. 252/2004 Sb.). A prototype of a portable technological unit for an on-site ferrate
application (Fe(IV), Fe(V)) has been constructed to prove on a semi-pilot scale that
ferrates are applicable for production of drinking water. Water flow of 100 L/h, two
sources of groundwater containing arsenic in concentrations ten times exceeding the
limit for drinking water, and ferrates (in the form of commercial ferrate, dosed in
different amounts—5 mg/L, 10 mg/L, 15 mg/L, and 20 mg/L) were used. The quality
of the treated water from both sites was in compliance with the requirements for
drinking water. The minimal dose of commercial ferrates to reach the As limit for
potable water was set to 10 mg/L for the first water source and 15 mg/L for the
second one. Elimination of microbial organisms was achieved even with a lower
dose of commercial ferrates—10 mg/L. The main advantages of the tested
M. Heřmánková (*)
DEKONTA, a.s., Stehelčeves, Czech Republic
AECOM CZ, s.r.o., Praha, Czech Republic
e-mail: hermankova@dekonta.cz
R. Vokáč
AECOM CZ, s.r.o., Praha, Czech Republic
J. Slunský
NANO IRON, s.r.o., Židlochovice, Czech Republic
J. Filip
Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc,
Olomouc, Czech Republic
© Springer Nature Switzerland AG 2020
J. Filip et al. (eds.), Advanced Nano-Bio Technologies for Water and Soil Treatment,
Applied Environmental Science and Engineering for a Sustainable Future,
https://doi.org/10.1007/978-3-030-29840-1_13
299