TY  - JOUR
AU  - Romano, Melisa S.
AU  - Corne, Valeria
AU  - Azario, Ricardo R.
AU  - Centurión, Emiliano
AU  - García, María del Carmen
PY  - 2025
DA  - 2025/01/10
TI  - Valorization of Agroindustrial Waste as Biosorbent of Lead (II) in Solution and its Reuse in the Manufacture of Building Bricks
JO  - Recent Progress in Materials
SP  - 002
VL  - 07
IS  - 01
AB  - Lead is a non-biodegradable toxic heavy metal. Biosorption process is an attractive technique to remediate lead-contaminated environments because it is simple, effective and low-cost. In addition, rice husk constitutes a highly available residual biomass that could be used as bioadsorbent. Thus, the aim of this study was to analyze the biosorption of lead on natural and chemically treated rice husk and evaluate the incorporation of the residue (biomass-contaminant) into ceramic matrices to immobilize the removed lead. Natural rice husk and alkaline activated rice husk were characterized and used like bioadsorbents of lead in solution. Data obtained from biosorptions experiments demonstrated that the removal was maximum at pH 5 and the equilibrium was achieved in 30 min. The retention efficiency was improved due to the alkaline treatment, achieving removal higher than 94 % even when low doses of bioadsorbent were used. Biosorption data showed satisfactory fits to Langmuir isotherm and followed a pseudo-second order rate kinetic. After biosorption process, ceramic pieces were obtained from mixtures of commercial clay and rice husk with adsorbed metal, added by 10 % in volume. Lead fixation was determined by ecotoxicity and leachate tests demonstrating that ceramic pieces immobilized the lead within their structure. Finally, the use of alkaline treated rice husk as bioadsorbent of lead and the incorporating of the biomass-lead residue in ceramic matrices to immobilize the lead could be presented like an eco-friendly alternative of detoxification for lead-contaminated environments.
SN  - 2689-5846
UR  - https://doi.org/10.21926/rpm.2501002
DO  - 10.21926/rpm.2501002
ID  - Romano2025
ER  -