Calorimetric studies of removal of nonsteroidal anti-inflammatory drugs diclofenac and dipyrone from water

Carvalho, Thiago O.; Matias, Ana E. B.; Braga, Lilian R.; Evangelista, Sheila M.; Prado, Alexandre G.S.

doi:10.1007/s10973-010-1243-5

Cited by 16 publications

(11 citation statements)

References 19 publications

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“…Further, the signals in the 1200–1500 cm −1 and 900–1100 cm −1 ranges were subject to slight shifts of wavenumbers, indicating a hydrogen bonding reorganization. More specifically, the signal at 1410 cm −1 reduced its relative intensity and, at the same time, the C-O-C vibration modes slightly changed [10,19]. These observations, in agreement with results obtained during the pH study, suggest the presence of electrostatic interaction between DCF and CH during the adsorption process.…”

Section: Resultssupporting

confidence: 76%

“…Then, the electrostatic interactions between the carboxylic moieties of DCF − and the chitosan amino groups positively charged take place, which favor the DCF − removal. At pH > 5, i.e., pH 8, DCF continues to be DCF − , while the chitosan amino groups were mainly deprotonated and reduce the affinity between the adsorbent and DCF − , which suggested an electrostatic repulsion between the DCF and CH negative charges [7,16,18,19]. The cartoon in Figure 2, graphically describes the hypothesized adsorption mechanism.…”

Section: Resultsmentioning

confidence: 99%

“…Hence, as a whole, the work conditions used in our study for the formation of CH can be considered safe and green since cleaner production technologies [8,12,13,14,15,16,17,18,19,20,35] decrease the environmental impact by reusing the adsorbent itself and the pollutant.…”

Section: Resultsmentioning

confidence: 99%

“…The influence of chitosan on filtration performances for heavy metals removal was presented by Lam et al [13] by highlighting the recent interest toward chitosan as wide-ranging adsorbent material [13,14]. Starting from these considerations, about the removal of pollutants from water, the use of bio adsorbents [15,16,17,18,19,20] is so contemplated and, with the particular regard to DCF, to our knowledge, only few papers have been reported in literature, by mainly discussing the use of chitosan-based systems [15,16,17,18,19]. Chitosan, which is a by-product from the alkaline deacetylation process of chitin, is an amino polysaccharide known for its distinctive properties, besides biodegradability and biocompatibilities [8].…”

Section: Introductionmentioning

confidence: 99%

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Chitosan Film as Eco-Friendly and Recyclable Bio-Adsorbent to Remove/Recover Diclofenac, Ketoprofen, and Their Mixture from Wastewater

et al. 2019

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This paper reported the first example on the use of chitosan films, without further modification, to remove and recover, through bio-sorption processes, the emerging pollutant Diclofenac from water. The latter was adopted as a model, among non-steroidal anti-inflammatory drugs, by obtaining a maximum adsorption capacity, qmax, on chitosan of about 10 mg/g, under the applied experimental conditions of work. The literature gap about the use of chitosan films, which was already used for dyes and heavy metals removal, to adsorb emerging pollutants from water was covered, claiming the wide range application of chitosan films to remove a different class of pollutants. Several parameters affecting the Diclofenac adsorption process, such as the pH and ionic strength of solutions containing Diclofenac, the amount of the bio-sorbent and pollutant, and the temperature values, were investigated. The kinetics and the adsorption isotherms, along with the thermodynamic parameters (ΔG°, ΔH°, and ΔS°) were also evaluated. The process occurred very efficiently, and Chitosan/Diclofenac amounts dependent, remove about the 90% of the pollutant, in 2 h, from the tested solutions, through electrostatic interaction involving the carboxylic moiety of Diclofenac and Chitosan amino groups. This finding was confirmed by the pH and salt effects on the bio-sorption process, including swelling measurements of Chitosan films and by FTIR-ATR analysis. In detail, the maximum adsorption was observed at pH 5, when pollutant and Chitosan were negatively and positively charged, respectively. By reducing or increasing the pH around this value, a reduced affinity was observed. Accordingly, the presence of salts retarded the Diclofenac removal screening its charges, which hinders the interaction with Chitosan. The sorption was spontaneous (ΔG° < 0) and endothermic (ΔH° > 0) following the pseudo-second order kinetic model. The process was Diclofenac and Chitosan amount dependent. In addition, the Freundlich and Temkin isotherms well described the process, which showed the heterogeneous character of the process. Experiments of the complete desorption were also performed by using NaCl solutions 0.25 M (like sea water salt concentration) proposing the reuse of the pollutant and the recycling of the bio-sorbent lowering the associated costs. The versatility of the adsorbent was reported by exploring the possibility to induce the Diclofenac light-induced degradation after the adsorption and by-products adsorption onto chitosan films. To emphasize the chitosan capacity of treating water, the removal of another pollutant such as Ketoprofen and the mixture of Diclofenac and Ketoprofen were investigated. In this way, a green and eco-friendly production-pollution prevention technology for removing emerging pollutants from water was presented, which reduced the overall environmental impact. This illustrated experiments both in static and dynamic conditions for potential industrial applications.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chitosan Film as Eco-Friendly and Recyclable Bio-Adsorbent to Remove/Recover Diclofenac, Ketoprofen, and Their Mixture from Wastewater

et al. 2019

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“…For acetaminophen, the results were in agreement with those reported by others [ 27 , 28 ]. For diclofenac, GAC exhibited favorable adsorption characteristics in both affinity and capacity compared to chitosan or organo-zeolites [ 29 – 31 ]. In contrast, the adsorption capacity of GAC toward sulfamethoxazole was nearly identical to that of mineral-zeolite [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Selected Pharmaceutical Compounds onto Activated Carbon in Dilute Aqueous Solutions Exemplified by Acetaminophen, Diclofenac, and Sulfamethoxazole

Chang

Wan

Kim

et al. 2015

The Scientific World Journal

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The adsorption of three pharmaceuticals, namely, acetaminophen, diclofenac, and sulfamethoxazole onto granular activated carbon (GAC), was investigated. To study competitive adsorption, both dynamic and steady-state adsorption experiments were conducted by careful selection of pharmaceuticals with various affinities and molecular size. The effective diffusion coefficient of the adsorbate was increased with decease in particle size of GAC. The adsorption affinity represented as Langmuir was consistent with the ranking of the octanol-water partition coefficient, K ow. The adsorption behavior in binary or tertiary systems could be described by competition adsorption. In the binary system adsorption replacement occurred, under which the adsorbate with the smaller K ow was replaced by the one with larger K ow. Results also indicated that portion of the micropores could be occupied only by the small target compound, but not the larger adsorbates. In multiple-component systems the competition adsorption might significantly be affected by the macropores and less by the meso- or micropores.

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Valorization of biomass ash for the effective removal of dipyrone from water: an efficient and low‐cost option

Oliveira

Reck

Resende

et al. 2023

J of Chemical Tech & Biotech

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Background: In order to propose a destination for the bottom ash generated from biomass burning, its morphology, functional groups and mineral phases were studied. Dipyrone has been extensively used as an antipyretic, increased due to cases of COVID-19, and due to excretion by urine, incorrect disposal and industrial effluents has been destined to wastewater, being harmful to human and animal life. The present study proposes using biomass ash for the adsorption of dipyrone.Results: The characterization of biomass ash shows a sufficient surface area size for adsorption, and a mainly amorphous structure with some peaks of quartz, calcite and other mineral phases. The results show that the kinetic model which best describes the adsorption is the pseudo-first-order model. The Langmuir model best fits at 25 °C, and the Freundlich model best describes the adsorption at 35 and 45 °C. The thermodynamic parameters indicated that the process is endothermic with a maximum adsorptive capacity of 65.27 mg g −1 . In addition, the adsorption is spontaneous, disordered and chemical. The ionic strength study reveals that the adsorbent is promising for real effluent treatment and there is evidence that electrostatic interaction is not the primary adsorptive mechanism, agreeing with the result obtained from pH testing. The proposed mechanism for dipyrone removal involves hydrogen bonds, π bonds and electron donor-acceptor complex.Conclusions: The results are promising in comparison with recent literature and solve two environmental problems: biomass bottom ash disposal and pharmaceutical removal in aqueous medium. The ash may be regarded as a low-cost and environmentally friendly adsorbent.

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Calorimetric studies of removal of nonsteroidal anti-inflammatory drugs diclofenac and dipyrone from water

Cited by 16 publications

References 19 publications

Chitosan Film as Eco-Friendly and Recyclable Bio-Adsorbent to Remove/Recover Diclofenac, Ketoprofen, and Their Mixture from Wastewater

Chitosan Film as Eco-Friendly and Recyclable Bio-Adsorbent to Remove/Recover Diclofenac, Ketoprofen, and Their Mixture from Wastewater

Adsorption of Selected Pharmaceutical Compounds onto Activated Carbon in Dilute Aqueous Solutions Exemplified by Acetaminophen, Diclofenac, and Sulfamethoxazole

Valorization of biomass ash for the effective removal of dipyrone from water: an efficient and low‐cost option

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