A green strategy for desorption of trihalomethanes adsorbed by humin and reuse of the fixed bed column.
The objective of the present work was to develop a thermal desorption method for the removal of trihalomethanes (THM) adsorbed by humin, followed by multiple recycling of the fixed bed column in order to avoid excessive consumption of materials and reduce operating costs. The results obtained for adsorption on a fixed bed column confirmed the effectiveness of humin as an adsorbent, extracting between 45.9% and 90.1% of the total THM (TTHM). In none of the tests was the column fully saturated after 10h. Experiments involving thermal desorption were used to evaluate the potential of the technique for column regeneration. The adsorptive capacity of the humin bed increased significantly (p<0.05) between the first and fifth desorption cycle, by 18.9%, 18.1%, 24.2%, 20.2% and 24.2% for CHBr(3), CHBr(2)Cl, CHBrCl(2), CHCl(3) and TTHM, respectively.
Department of Chemistry, Federal University of Sergipe (UFS), 49100-000 São Cristovão, SE, Brazil.
G C
GC
Cunha
L P C
LP
Romão
M C
MC
Santos
A S
AS
Costa
M R
MR
Alexandre
D000327:Adsorption; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006812:Humic Substances; D017550:Spectroscopy, Fourier Transform Infrared; D022882:Trihalomethanes / Q000737:chemistry*
D006812:Humic Substances; D022882:Trihalomethanes; C001861:humin