Evaluation of the ciprofloxacin adsorption capacity of common industrial minerals and application to tap water treatment

Bizi, Mohamed; Bachra, Fatima-Ezzahra El

doi:10.1016/j.powtec.2019.11.047

Cited by 48 publications

(15 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CIP has amphoteric character as well, due to the bicyclic aromatic ring skeleton with a carboxylic acid group (C-3, pK a1 of 5.90 ± 0.15), a keto group, and a basic amino moiety in the piperazine ring (C-7, pK a2 of 8.89 ± 0.11). So, depending on the pH conditions, CIP can be in different ionic forms, showing different physicochemical (e.g., on solubility and lipophilicity) and biological behavior [ 5 , 42 , 43 ]. At pH below 5.90, CIP is in the cationic form (CIP + ) due to the protonation of the amine group in the piperazine moiety, and, at pH above 8.89, it is in the anionic form (CIP − ), because the carboxylic group lacks a proton.…”

Section: Resultsmentioning

confidence: 99%

Detoxification of Ciprofloxacin in an Anaerobic Bioprocess Supplemented with Magnetic Carbon Nanotubes: Contribution of Adsorption and Biodegradation Mechanisms

Silva

Cavaleiro

Soares

et al. 2021

IJMS

View full text Add to dashboard Cite

In anaerobic bioreactors, the electrons produced during the oxidation of organic matter can potentially be used for the biological reduction of pharmaceuticals in wastewaters. Common electron transfer limitations benefit from the acceleration of reactions through utilization of redox mediators (RM). This work explores the potential of carbon nanomaterials (CNM) as RM on the anaerobic removal of ciprofloxacin (CIP). Pristine and tailored carbon nanotubes (CNT) were first tested for chemical reduction of CIP, and pristine CNT was found as the best material, so it was further utilized in biological anaerobic assays with anaerobic granular sludge (GS). In addition, magnetic CNT were prepared and also tested in biological assays, as they are easier to be recovered and reused. In biological tests with CNM, approximately 99% CIP removal was achieved, and the reaction rates increased ≈1.5-fold relatively to the control without CNM. In these experiments, CIP adsorption onto GS and CNM was above 90%. Despite, after applying three successive cycles of CIP addition, the catalytic properties of magnetic CNT were maintained while adsorption decreased to 29 ± 3.2%, as the result of CNM overload by CIP. The results suggest the combined occurrence of different mechanisms for CIP removal: adsorption on GS and/or CNM, and biological reduction or oxidation, which can be accelerated by the presence of CNM. After biological treatment with CNM, toxicity towards Vibrio fischeri was evaluated, resulting in ≈ 46% detoxification of CIP solution, showing the advantages of combining biological treatment with CNM for CIP removal.

show abstract

Section: Resultsmentioning

confidence: 99%

Detoxification of Ciprofloxacin in an Anaerobic Bioprocess Supplemented with Magnetic Carbon Nanotubes: Contribution of Adsorption and Biodegradation Mechanisms

Silva

Cavaleiro

Soares

et al. 2021

IJMS

View full text Add to dashboard Cite

show abstract

“…The materials include clay-based media (Yu et al 2008;Zhang et al 2010) which have shown some adsorption capacity. The elimination of ciprofloxacin has been studied at laboratory scale on various media including carbon, clay, and zeolites (Bizi and El Bachra 2020;Rostamian and Behnejad 2017;Wang et al 2015). However, these authors did not study the application or the treatment efficiency of clay-based nanocomposites in realistic conditions for the removal of several compounds with different solubility, size, hydrophobicity, and charge, such as the ones targeted here.…”

Section: Targeted Pharmaceutical Moleculesmentioning

confidence: 99%

Silica-clay nanocomposites for the removal of antibiotics in the water usage cycle

Levard

Hamdi-Alaoui

Baudin

et al. 2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

The increasingly frequent detection of resistant organic micropollutants in waters calls for better treatment of these molecules that are recognized to be dangerous for human health and the environment. As an alternative to conventional adsorbent material such as activated carbon, silica-clay nanocomposites were synthesized for the removal of pharmaceuticals in contaminated water. Their efficiency with respect to carbamazepine, ciprofloxacin, danofloxacin, doxycycline, and sulfamethoxazole was assessed in model water and real groundwater spiked with the five contaminants. Results showed that the efficacy of contaminant removal depends on the chemical properties of the micropollutants. Among the adsorbents tested, the nanocomposite made of 95% clay and 5% SiO 2 NPs was the most efficient and was easily recovered from solution after treatment compared with pure clay, for example. The composite is thus a good candidate in terms of operating costs and environmental sustainability for the removal of organic contaminants.

show abstract

“…A few studies have engaged in designing and evaluating innovative UV-LED photoreactor designs [37][38][39], and some of them have applied design of experiments (DoE), a powerful tool to optimize highly complex systems and find optimal conditions [40][41][42]. Studies evaluating the performance of UV-LED photocatalytic processes in real matrices, such as tap water, river water, or wastewater at real pollutant concentrations, are scarce [8,23,40,43,44]. The LED-exclusive feature of CPI has only been investigated for photocatalysis in simple scenarios; in MilliQ (MQ) water and rudimental reactor designs.…”

Section: Introductionmentioning

confidence: 99%

Performance of TiO2/UV-LED-Based Processes for Degradation of Pharmaceuticals: Effect of Matrix Composition and Process Variables

et al. 2022

View full text Add to dashboard Cite

Ultra-violet light-emitting diode (UV-LED)-based processes for water treatment have shown the potential to surpass the hurdles that prevent the adoption of photocatalysis at a large scale due to UV-LEDs’ unique features and design flexibility. In this work, the degradation of five EU Watch List 2020/1161 pharmaceutical compounds was comprehensively investigated. Initially, the UV-A and UV-C photolytic and photocatalytic degradation of individual compounds and their mixtures were explored. A design of experiments (DoE) approach was used to quantify the effects of numerous variables on the compounds’ degradation rate constant, total organic carbon abatement, and toxicity. The reaction mechanisms of UV-A photocatalysis were investigated by adding different radical scavengers to the mix. The influence of the initial pH was tested and a second DoE helped evaluate the impact of matrix constituents on degradation rates during UV-A photocatalysis. The results showed that each compound had widely different responses to each treatment/scenario, meaning that the optimized design will depend on matrix composition, target pollutant reactivity, and required effluent standards. Each situation should be analyzed individually with care. The levels of the electrical energy per order are still unfeasible for practical applications, but LEDs of lower wavelengths (UV-C) are now approaching UV-A performance levels.

show abstract

Evaluation of the ciprofloxacin adsorption capacity of common industrial minerals and application to tap water treatment

Cited by 48 publications

References 39 publications

Detoxification of Ciprofloxacin in an Anaerobic Bioprocess Supplemented with Magnetic Carbon Nanotubes: Contribution of Adsorption and Biodegradation Mechanisms

Detoxification of Ciprofloxacin in an Anaerobic Bioprocess Supplemented with Magnetic Carbon Nanotubes: Contribution of Adsorption and Biodegradation Mechanisms

Silica-clay nanocomposites for the removal of antibiotics in the water usage cycle

Performance of TiO2/UV-LED-Based Processes for Degradation of Pharmaceuticals: Effect of Matrix Composition and Process Variables

Contact Info

Product

Resources

About