Removal of analgesics from aqueous solutions onto montmorillonite KSF

Vallová, Silvie; Plevová, Eva; Smutná, Kateřina; Sokolová, Barbora; Vaculíková, Lenka; Valovičová, V.; Hundáková, Marianna; Praus, Petr

doi:10.1007/s10973-021-10591-y

Cited by 10 publications

(6 citation statements)

References 48 publications

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“…Both hydrophobicity and interlayer spacing of modified MMT clay increases with the increase in the length of the alkyl chain of cation surfactant used for clay modification [ 53 ]. Thus, modification of KSF MMT with a shorter chain molecule cetyltrimethylammonium bromide greatly increased the adsorption of IBP compared to non-modified clay, but the maximal removal efficiency reached only 70% [ 54 ]. The comparison of IPB sorption on hexadecyltrimethylammonium modified MMT and zeolite revealed that the sorption affinity depended on the adsorbent organic carbon content [ 55 ] The better sorption of IBP on hydrophobic MMT compared to pristine MMT can be partly explained by a positive charge of MMT-STA, favouring the adsorption of negatively charged IPB at pH = 6.…”

Section: Resultsmentioning

confidence: 99%

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Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay

Kryuchkova

Batasheva

Akhatova

et al. 2021

IJMS

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The problem of purifying domestic and hospital wastewater from pharmaceutical compounds is becoming more and more urgent every year, because of the continuous accumulation of chemical pollutants in the environment and the limited availability of freshwater resources. Clay adsorbents have been repeatedly proposed as adsorbents for treatment purposes, but natural clays are hydrophilic and can be inefficient for catching hydrophobic pharmaceuticals. In this paper, a comparison of adsorption properties of pristine montmorillonite (MMT) and montmorillonite modified with stearyl trimethyl ammonium (hydrophobic MMT-STA) towards carbamazepine, ibuprofen, and paracetamol pharmaceuticals was performed. The efficiency of adsorption was investigated under varying solution pH, temperature, contact time, initial concentration of pharmaceuticals, and adsorbate/adsorbent mass ratio. MMT-STA was better than pristine MMT at removing all the pharmaceuticals studied. The adsorption capacity of hydrophobic montmorillonite to pharmaceuticals decreased in the following order: carbamazepine (97%) > ibuprofen (95%) > paracetamol (63–67%). Adsorption isotherms were best described by Freundlich model. Within the pharmaceutical concentration range of 10–50 µg/mL, the most optimal mass ratio of adsorbates to adsorbents was 1:300, pH 6, and a temperature of 25 °C. Thus, MMT-STA could be used as an efficient adsorbent for deconta×ating water of carbamazepine, ibuprofen, and paracetamol.

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Section: Resultsmentioning

confidence: 99%

“…However, not all hydrophobizing agents are equally efficient in increasing paracetamol adsorption by MMT. For instance, montmorillonite KSF modified with cetyltrimethylammonium bromide removed maximally 50% of PAR from aqueous solutions [ 54 ].…”

Section: Resultsmentioning

confidence: 99%

Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay

Kryuchkova

Batasheva

Akhatova

et al. 2021

IJMS

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“…Generally, the modification process is based on replacing the interlayer cations by organo‐cations like alkylammonium or alkylphosphonium cations. Such ion exchange modifies the hydrophilic disposition to organophilic, which enables intercalation and sorption of the organic compounds like polyaromatic hydrocarbons, pharmaceuticals, pesticides, tenzides, etc 15‐20 . But using organic compounds like alkylammonium or alkylphosphonium cations can bring some limitations like quite high cost, lower accessibility or potential gradual desorption of alkylammonium and alkylphosphonium cations leading to the reduction of the adsorption capacity of the prepared organoclay composite and also such released surfactant can become a further potential pollutant in the environment 21,22 .…”

Section: Introductionmentioning

confidence: 99%

Removal of amoxicillin and ampicillin using manganese dioxide/montmorillonite composite

Valovičová

Plevová

Vallová

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Clay‐based materials represent great potential for the development of efficient and environmentally friendly sorbents. The study focuses on a laboratory‐obtained manganese dioxide/montmorillonite (MnO2/MMT) composite for removal of two types of antibiotics – amoxicillin (AMX) and ampicillin (AMP) – from aqueous solution. RESULTS The composite was successfully prepared using a reduction procedure involving the reaction between potassium permanganate (KMnO4) and hydrochloric acid (HCl) to form MnO2 followed by the addition of MMT. X‐ray analysis, scanning electron microscopy, X‐ray fluorescence and Fourier transform infrared spectroscopy were performed for characterization of physicochemical and structural properties, simultaneous thermogravimetry and differential scanning calorimetry for estimation of thermal stability and high‐performance liquid chromatography for determination of antibiotic equilibrium concentrations in aqueous solution. The precipitated MnO2 component, manifested by long fibers, corresponded to the tunnel structure of cryptomelane. In the case of MnO2/MMT it is evident that MnO2 developed short fibers with the participation of the MMT matrix. The thermal data suggested that the MnO2 phase upon contact with the clay support showed better thermal stability. The final decomposition of Mn2O3 was shifted to higher temperature of 985 °C. Adsorption procedure in a batch regimen showed sufficient sorption ability for both antibiotics with over 90% efficiency. For AMP the value of qmax was about 45 mg g−1 and for AMX it was only 21 mg g−1. CONCLUSIONS The results provided valuable information for the design of a potentially inexpensive clay‐based adsorbent and demonstrated the removal of two types of broad‐spectrum β‐lactam antibiotics from aqueous solution to a sufficient degree. © 2022 Society of Chemical Industry (SCI).

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“…Inorganic clays are low-cost supports, with high adsorption capacity, environmentally friendly properties and renewable abundance [18,19]. Among those, clay minerals such as, diatomite, vermiculite, montmorillonite KSF and kaolinite are good examples of supports for enzyme immobilization [20], due to the unique physicochemical characteristics, viz, high thermal and chemical stability, mechanical strength, charge density (excellent ion exchange and adsorption capacity), relative hydrophobicity-hydrophilicity, high surface area, microbial resistance, environmental sustainability and economically viable [18,[21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…Smectite clays such as montmorillonite have a large surface area and pore volume, useful characteristics in the adsorption process, the enzymes can be adsorbed on both the internal and external surface of the mineral [21,31,32]. These materials have been successful used to immobilize invertase [33,34], α-amylase [34], glucoamylase [34], lipase [22,[35][36][37][38][39][40][41], inulinase [42], pectinase [25], phytase [21] and rhynchophorol [30].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Clay Materials as Support for Aspergillus japonicus Lipase: An Eco-Friendly Approach

et al. 2021

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Lipase is an important group of biocatalysts, which combines versatility and specificity, and can catalyze several reactions when applied in a high amount of industrial processes. In this study, the lipase produced by Aspergillus japonicus under submerged cultivation, was immobilized by physical adsorption, using clay supports, namely, diatomite, vermiculite, montmorillonite KSF (MKSF) and kaolinite. Besides, the immobilized and free enzyme was characterized, regarding pH, temperature and kinetic parameters. The most promising clay support was MKSF that presented 69.47% immobilization yield and hydrolytic activity higher than the other conditions studied (270.7 U g−1). The derivative produced with MKSF showed high stability at pH and temperature, keeping 100% of its activity throughout 12 h of incubation in the pH ranges between 4.0 and 9.0 and at a temperature from 30 to 50 °C. In addition, the immobilized lipase on MKSF support showed an improvement in the catalytic performance. The study shows the potential of using clays as support to immobilized lipolytic enzymes by adsorption method, which is a simple and cost-effective process.

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Removal of analgesics from aqueous solutions onto montmorillonite KSF

Cited by 10 publications

References 48 publications

Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay

Pharmaceuticals Removal by Adsorption with Montmorillonite Nanoclay

Removal of amoxicillin and ampicillin using manganese dioxide/montmorillonite composite

Utilization of Clay Materials as Support for Aspergillus japonicus Lipase: An Eco-Friendly Approach

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