Equilibrium, kinetic and thermodynamic study of Pb2+ removal from aqueous solution by waste brick dust

0549359 - ÚFCH JH 2023 RIV NL eng J - Journal Article
Mikysková, Eliška - Doušová, B. - Mikysek, Petr - Lhotka, M. - Koloušek, D.
Equilibrium, kinetic and thermodynamic study of Pb2+ removal from aqueous solution by waste brick dust.
Colloids and Surfaces A-Physicochemical and Engineering Aspects. Roč. 634, FEB 2022 (2022), č. článku 127939. ISSN 0927-7757. E-ISSN 1873-4359
Institutional support: RVO:61388955 ; RVO:67985831
Keywords : adsorption * kinetics * waste brick dust
OECD category: Physical chemistry; Mineralogy (GLU-S)
Impact factor: 5.2, year: 2022
Method of publishing: Limited access

Many studies have been focused on the investigation of new remediation techniques using adsorption for the
fixation of toxic ions to second-rate and low-cost materials. The attention is now focused on waste ceramics,
especially the waste brick dust (BD). The adsorption, kinetic and thermodynamic properties of two types of BD
(Libochovice and Hevlín – BDL and BDH) were tested for the adsorption of Pb2+ from model solution. Fractionated
BD was characterized using X-ray diffraction (XRD) and X-ray fluorescence (XRF) analyses, specific
surface area (SBET) and pH of point of zero charge (pHPZC). The tests of pozzolanic activity and the stability of
Pb2+ in saturated sorbents were also performed. The studied BDs differ significantly in their clay content, SBET
and porosity. We can assume that a combination of these parameters is the driving force of the adsorption
processes. In general, BDs were confirmed as very good adsorbents for Pb2+ ions. The BDL with a larger SBET and
a higher pozzolanic activity proved more than twice the adsorption capacity of BDH. The rate constants and
standard Gibbs energy indicated a more favourable and thermodynamically stable adsorption on the BDL
compared to the BDH. Physico-chemical parameters of the individual size fractions of the BDs were not found to
be critically different.
Permanent Link: http://hdl.handle.net/11104/0325372