Activity of dehydrogenases in clay soil exposed to quaternary ammonium salts with iodine anion

Telesiński, Arkadiusz; Pawłowska, Barbara; Biczak, Robert; J, Pater

doi:10.17951/pjss.2017.50.2.189

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…In TEP-MS, peaks at 721–754 cm –1 and peaks at 1200–1300 are related to P-C stretching and P-CH 2 -R deformation bands, respectively . Moreover, the C–H bond at 2926 cm –1 and the ether bond (C–O) at 1072, 1161, and 1234 cm –1 are also noted in TEA-TFMS . It was noticed that the treated Na-Mt shows a minor shift of the Si–O stretching vibration originally recorded at 983 cm –1 .…”

Section: Resultsmentioning

confidence: 99%

Ionic Liquids as Clay Swelling Inhibitors: Adsorption Study

et al. 2022

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This study investigates the inhibition performance of ionic liquids (ILs) on clay (montmorillonite) swelling and the possible inhibition mechanism. The adsorption of various types of ILs in swelling clay was studied by adsorption isotherms, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). Experiments were conducted at different concentrations for different types of ILs. Moreover, the adsorption isotherms were modeled using Langmuir, Freundlich, Sips, Redlich–Peterson, and Fritz–Schlunder models. The type of model fitting was used to evaluate the clay stability in terms of monolayer and multilayer adsorption. The experimental results revealed that the ILs’ adsorption strongly depends on the IL structures and concentrations. The results showed that in aqueous solutions, IL molecules have a strong interaction with swelling clay minerals, causing the intercalation between the interlayer of the clay minerals and ILs. XRD results revealed that the intercalation of ILs between the layers of clay is related to the enlargement in basal (d) spacing. The efficacy of the adsorption process was also demonstrated by the specific bands of the ILs on the infrared spectra. The relative amount of the IL adsorbed on the clay surface was in the order of 1A3MI-CN < 1B1MP-Br < TBP-MS < TEA-TFMS. Error metrics consisting of the coefficient of determination (R 2), mean square error (MSE), and mean absolute error (MAE) was employed as a criterion for a better fit of the adsorption model of ILs. Sips and Redlich–Peterson adsorption models show a reasonable fitting for all ILs in this study.

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Section: Resultsmentioning

confidence: 99%

Ionic Liquids as Clay Swelling Inhibitors: Adsorption Study

et al. 2022

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“…Some studies also showed the effect of quaternary ammonium salts (QAS) and other ILs on the activity of soil enzymes. These demonstrated, among others, a decrease in the activity of DHA under the influence of QAS with iodine anion [ 61 ] or the activity of o-diphenol oxidase under the influence of QAS with hexafluorophosphate anion [ 62 ]. These effects were observed to increase both with the increase in the dose of ILs and the level of elongation of alkyl substituent in the cation [ 58 , 59 , 60 , 61 , 62 ].…”

Section: Resultsmentioning

confidence: 99%

Enzymatic Activity and Its Relationship with Organic Matter Characterization and Ecotoxicity to Aliivibrio fischeri of Soil Samples Exposed to Tetrabutylphosphonium Bromide

Telesiński

Pawłowska

Biczak

et al. 2021

Sensors

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This study aimed to determine the impact of tetrabutylphosphonium bromide [TBP][Br] on the soil environment through an experiment on loamy sand samples. The tested salt was added to soil samples at doses of 0 (control), 1, 10, 100, and 1000 mg kg−1 dry matter (DM). During the experiment, the activity of selected enzymes involved in carbon, phosphorus, and nitrogen cycles, characteristics of organic matter with Fourier-transform infrared (FT-IR) spectroscopy, and toxicity of soil samples in relation to Aliivibrio fischeri were determined at weekly intervals. The results showed that low doses of [TBP][Br] (1 and 10 mg kg−1 DM) did not have much influence on the analyzed parameters. However, the addition of higher doses of the salt into the soil samples (100 and 1000 mg kg−1 DM) resulted in a decrease in the activity of enzymes participating in the carbon and phosphorus cycle and affected the activation of those enzymes involved in the nitrogen cycle. This may be due to changes in aerobic conditions and in the qualitative and quantitative composition of soil microorganisms. It was also observed that the hydrophobicity of soil organic matter was increased. Moreover, the findings suggested that the soil samples containing the highest dose of [TBP][Br] (1000 mg kg−1 DM) can be characterized as acute environmental hazard based on their toxicity to Aliivibrio fischeri bacteria. The increased hydrophobicity and ecotoxicity of the soil samples exposed to the tested salt were also positively correlated with the activity of dehydrogenases, proteases, and nitrate reductase. Observed changes may indicate a disturbance of the soil ecochemical state caused by the presence of [TBP][Br].

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“…The activity and stability are the main parameters to determine the applicability of an enzyme. Several research groups have studied the effects of detergents, solvents, salts, and polymers on the catalytic performance of enzymes, including lipases, to expand their applications.…”

Section: Introductionmentioning

confidence: 99%

Effects of cholinium‐based ionic liquids on Aspergillus niger lipase: Stabilizers or inhibitors

Nascimento

Picheli

Lopes

et al. 2019

Biotechnology Progress

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Lipases are well‐known biocatalysts used in several industrial processes/applications. Thus, as with other enzymes, changes in their surrounding environment and/or their thermodynamic parameters can induce structural changes that can increase, decrease, or even inhibit their catalytic activity. The use of ionic compounds as solvents or additives is a common approach for adjusting reaction conditions and, consequently, for controlling the biocatalytic activity of enzymes. Herein, to elucidate the effects of ionic compounds on the structure of lipase, the stability and enzymatic activity of lipase from Aspergillus niger in aqueous solutions (at 0.05, 0.10, 0.50, and 1.00 M) of six cholinium‐based ionic liquids (cholinium chloride [Ch]Cl; cholinium acetate ([Ch][Ac]); cholinium propanoate ([Ch][Prop]); cholinium butanoate ([Ch][But]); cholinium pentanoate ([Ch][Pent]); and cholinium hexanoate ([Ch][Hex])) were evaluated over 24 hr. The enzymatic activity of lipase was maintained or enhanced in the lower concentrations of all the [Ch]+‐ILs (below 0.1 M). [Ch][Ac] maintained the biocatalytic behavior of lipase, independent of the IL concentration and incubation time. However, above 0.1 M, [Ch][Pent] and [Ch][Hex] caused complete inhibition of the catalytic activity of the enzyme, demonstrating that the increase in the anionic alkyl chain length strongly affected the conformation of the lipase. The hydrophobicity and concentration of the [Ch]+‐ILs play an important role in the enzyme activity, and these parameters can be controlled by adjusting the anionic alkyl chain length. The inhibitory effects of [Ch][Pent] and [Ch][Hex] may be of great interest to the pharmaceutical industry to induce pharmacological inhibition of gastric and pancreatic lipases.

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Activity of dehydrogenases in clay soil exposed to quaternary ammonium salts with iodine anion

Cited by 3 publications

References 13 publications

Ionic Liquids as Clay Swelling Inhibitors: Adsorption Study

Ionic Liquids as Clay Swelling Inhibitors: Adsorption Study

Enzymatic Activity and Its Relationship with Organic Matter Characterization and Ecotoxicity to Aliivibrio fischeri of Soil Samples Exposed to Tetrabutylphosphonium Bromide

Effects of cholinium‐based ionic liquids on Aspergillus niger lipase: Stabilizers or inhibitors

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