Innovative sequential combination of fixed bed adsorption/desorption and photocatalysis cost-effective process to remove antibiotics in solution

• Published in: Progress in organic coatings Vol. 151; p. 106014
• Main Authors: Karoui, Sarra, Arfi, Rim Ben, Ghorbal, Achraf, Amrane, Abdeltif, Assadi, Aymen Amine
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.02.2021; Elsevier BV; Elsevier
• Subjects: Acetic acid; Adsorption; Antibiotic removal; Antibiotics; Beads; Chemical Sciences; Desorption; Fixed beds; Hydrochloric acid; Photocatalysis; Reed-based composite (R) beads; Regeneration; Wastewater; Regeneration; Adsorption; Reed-based composite (R) beads; Photocatalysis; Antibiotic removal
• ISSN: 0300-9440; 1873-331X
• DOI: 10.1016/j.porgcoat.2020.106014

[Display omitted] •Biocomposite beads as adsorbent were simply prepared from Reed plant.•Sequential combination of photocatalysis and adsorption was first time used to remove antibiotics.•Surface characterization confirm the success of adsorption and photodegradation process.•Ciprofloxacin photodegradation mechanism was discussed. In this paper, a Reed-based composite (R) beads, combined with photocatalysis, for the oxidative degradation of fluoroquinolones ciprofloxacin (CIP) in simulated hospital wastewater was developed. It is well known that hospital effluents present very diluted pollution (less than 5 mg/L), The first purpose, which concerns the first step to treat CIP solution (4 mg/L) via adsorption on (R) beads in continuous column system. The second aim was to regenerate the material for the simultaneous R reuse and CIP desorption in a low volume of a highly concentrated solution (≈30 mg/L). The third purpose was to degrade the concentrated solution of antibiotic using continuous and batch photocatalytic reactors. After CIP uptake on R-beads, two acid solutions were investigated for the regeneration step. Indeed desorption process was investigated using acetic acid (0.1 M) and hydrochloric acid (0.1 M) as eluents, leading to a highly concentrated CIP solution (≈30 mg/L) compared to the feed solution (4 mg/L). Consequently, these results provide new study into the application of sequential combination to effectively mineralize antibiotics with continuous treatment.