Adsorption Mechanism of Ciprofloxacin from Water by Synthesized Birnessite

Xiao, Xing; Feng, Jingwen; Lv, Guocheng; Song, Kenan; Mei, Lefu; Liao, Libing; Wang, Xiaoyu; Xu, Ben

doi:10.1155/2015/148423

Cited by 15 publications

(16 citation statements)

References 24 publications

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“…7,8 Consequently, the presence of FQ pollutants in the environment threatens the safety of drinking water and aquatic ecosystems, and they must be either removed from water or degraded. The elimination of FQs from drinking water and wastewater by direct photolysis, 9 advanced oxidation processes (AOPs), 10 and adsorption 11 has been reported.…”

Section: ■ Introductionmentioning

confidence: 99%

Adsorptive Removal of Fluoroquinolones from Water by Pectin-Functionalized Magnetic Nanoparticles: Process Optimization Using a Spectrofluorimetric Assay

Attallah

Al‐Ghobashy²,

Nebsen

et al. 2016

ACS Sustainable Chem. Eng.

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The efficiency of adsorption of two photosensitive fluoroquinolones; Ciprofloxacin (CIP) and Moxifloxacin (MOX), on the surface of synthesized magnetite/pectin nanoparticles (MPNPs) and magnetite/silica/pectin nanoparticles (MSPNPs) was studied from aqueous solution under varying experimental conditions. A validated spectrofluorimetric assay was developed for monitoring of CIP and MOX intact drugs and their photodegraded molecules concentrations. To optimize the working conditions which influence the drugs sorption, a 24 full factorial experimental design was implemented. The maximum percentage of removal was attained as 89% (type of sorbent = MSPNPs, pH = 7.0, initial drug concentration = 5 mg/L, and contact time = 30 min). The studied factorspH, NPs loading, initial drug concentration, and contact timewere significant for both types of sorbents. The most significant variable was pH, and the highest CIP and MOX adsorption occurred at pH = 7.0. Equilibrium isotherm data were fitted to Langmuir, Freundlich, and Sips equations, and the Sips model showed the best fit with equilibrium isotherm data. Furthermore, pseudo-first- and pseudo-second-order kinetic models were used to analyze sorption kinetics, and it was found that adsorption of the investigated fluoroquinolones followed pseudo-second-order kinetics. We believe that our synthesized NPs can be used as effective adsorbents for fluoroquinolones and their photodegraded molecules removal from aqueous solutions.

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Section: ■ Introductionmentioning

confidence: 99%

Adsorptive Removal of Fluoroquinolones from Water by Pectin-Functionalized Magnetic Nanoparticles: Process Optimization Using a Spectrofluorimetric Assay

Attallah

Al‐Ghobashy²,

Nebsen

et al. 2016

ACS Sustainable Chem. Eng.

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“…Apart from this, zeta potential of Cu MOF is found negative in basic pH conditions suggesting negative surface charge of Cu MOF which can be attributed to presence of oxygen containing functional groups on Cu MOF [49]. The pKa (acid dissociation constants) values for CIP are reported 6.1 and 8.7 suggesting that CIP exist as a zwitterion in pH range 6.1 to 8.7 suggesting electro-static interaction is possible between Cu MOF and CIP [62]. In view of the proposed mechanism, CIP can strongly interact with Cu MOF via electrostatic or π-π interactions and significantly reduce peak current of Cu MOF.…”

Section: Electrochemical Determination Of Cip Using Cu Mof/gc Electromentioning

confidence: 91%

“…Figure 5 (b) shows the current response of Cu MOF/GC at different pH and maximum current response was obtained in neutral to basic range (pH 7.0 to 8.0). In basic pH medium, CIP is present as negatively charged molecule and therefore easy to interact at cationic sites of Cu MOF [62]. In low pH region, CIP exist as cationic molecule due to which its interaction is quite weak towards cationic sites of Cu MOF which results in lower response.…”

Section: Electrochemical Determination Of Cip Using Cu Mof/gc Electromentioning

confidence: 99%

Copper Based Organic Framework Modified Electrosensor for Selective and Sensitive Detection of Ciprofloxacin

et al. 2020

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The electrochemical detection of ciprofloxacin (CIP) using copper metal organic framework (Cu BTC) is reported. The glassy carbon electrode was used as a base electrode which was further modified with Cu BTC and differential pulse voltammetry technique was adopted for electrosensing. Under optimized conditions, a linear response for CIP was obtained in concentration range from 1×10−8 to 20×10−6 mol L−1 with a limit of detection of 0.47×10−9 mol L−1. Moreover, the proposed electrosensor showed acceptable reproducibility with 2.39 % relative standard deviation. Determination of CIP in tap water samples showed good recovery in range of 94.6–108 %.

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“…CIP is found as cationic and anionic form in the acidic and alkaline solution (pKa1 = 6.1 and pKa2 = 8.7) due to the presence of carboxylic and amine groups in the piperazine moiety (Xing et al 2015). The chemical structure of ciprofloxacin has been demonstrated in Fig.…”

Section: Chemicals and Reagentsmentioning

confidence: 99%

UV Based Advanced Oxidation Process for Degradation of Ciprofloxacin: Reaction Kinetics, Effects of Interfering Substances and Degradation Product Identification

Mondal

Basak

Das

et al. 2021

Preprint

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In the photochemical UV-H2O2 advanced oxidation process, H2O2 absorbs UV light and is decomposed to form hydroxyl radicals (OH·), which are highly excited and reactive for electron-rich organic compounds and hence can degrade organic compounds. In the present work, the UV-H2O2 process was investigated to degrade ciprofloxacin (CIP), one of India's widely used antibiotics, from aqueous solutions using a batch type UV reactor having photon flux = 1.9 (± 0.1) ×10-4 Einstein L-1 min-1. The effects of UV irradiation time on CIP degradation were investigated for both UV and UV-H2O2 processes. It was found that about 75% degradation of CIP was achieved within 60 s with initial CIP concentration and peroxide concentration of 10 mg L-1 and 1 mol H2O2/ mol CIP, respectively, at pH of 7(±0.1) and fluence dose of 113 mJ cm-2. The experimental data were analyzed by the first-order kinetics model to find out the time- and fluence-based degradation rate constants. Under optimized experimental conditions (initial CIP concentration, pH and H2O2 dose of 10 mg L-1, 7(±0.1) and 1.0 mol H2O2 / mol CIP, respectively), the fluence-based pseudo-first-order rate constant for the UV and UV-H2O2 processes were determined to be 1.28(±0.0) ×10-4 and 1.20(±0.04) ×10-2 cm2 mJ-1 respectively. The quantum yields at various pH under direct UV were calculated. The impacts of different process parameters such as H2O2 concentration, solution pH, initial CIP concentration, and wastewater matrix on CIP degradation were also investigated in detail. CIP degradation was favorable in acidic conditions. Six degradation products of CIP were identified. Results clearly showed the potentiality of the UV-H2O2 process for the degradation of antibiotics in wastewater.

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Adsorption Mechanism of Ciprofloxacin from Water by Synthesized Birnessite

Cited by 15 publications

References 24 publications

Adsorptive Removal of Fluoroquinolones from Water by Pectin-Functionalized Magnetic Nanoparticles: Process Optimization Using a Spectrofluorimetric Assay

Adsorptive Removal of Fluoroquinolones from Water by Pectin-Functionalized Magnetic Nanoparticles: Process Optimization Using a Spectrofluorimetric Assay

Copper Based Organic Framework Modified Electrosensor for Selective and Sensitive Detection of Ciprofloxacin

UV Based Advanced Oxidation Process for Degradation of Ciprofloxacin: Reaction Kinetics, Effects of Interfering Substances and Degradation Product Identification

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