Effect of water matrix on ligand-assisted adsorption of ciprofloxacin from aqueous solutions by zerovalent iron nanoparticles

Abstract

The adsorption of the antibiotic ciprofloxacin (CIP) from natural water and wastewater could be challenging due to the presence of competing compounds and elements. This study illustrates the negative influence of ionic strength, coexisting ions, and natural organic matter on the adsorption of CIP by oxalate-modified zerovalent iron nanoparticles (Fe 0 /oxalate). The results showed that the ionic strength of aqueous solution slightly decreased CIP removal efficiency from 95.43% to 85.23% after increasing sodium chloride concentration to 100 mM. On the contrary, the competence of (Fe 0 /oxalate) nanoparticles in adsorbing CIP slightly dropped from 95.43% to 94.42% due to the increase of humic acid from 0 to 40 mg L -1 . Also, the outcomes conclude that the inhibitory effect of 10 mM of coexisting ions was ranked as follows: K + < CO3 2-< Ca 2+ < SO₄ 2-< NO3 -<Mg 2+ .

Hydrogen production of anaerobic digestion: A review

“…On the other hand, more and more studies have focused on the effect of nano zero-valent iron in the anaerobic digestion process. ZVI has advantages such as operational simplicity and low cost [29,30]. NZVI is widely used for contaminant removal and environmental remediation [31,32,33,34].…”