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Singh M, Singh G, Kaur H, Muskan, Kumar S, Aswal VK, Kang TS. Self-assembly of choline-based surface-active ionic liquids and concentration-dependent enhancement in the enzymatic activity of cellulase in aqueous medium. Phys Chem Chem Phys 2024; 26:16218-16233. [PMID: 38804505 DOI: 10.1039/d4cp01236d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The micellization of choline-based anionic surface-active ionic liquids (SAILs) having lauroyl sarcosinate [Sar]-, dodecylsulfate [DS]-, and deoxycholate [Doc]- as counter-ions was investigated in an aqueous medium. Density functional theory (DFT) was employed to investigate the net interactional energy (Enet), extent of non-covalent interactions, and band gap of the choline-based SAILs. The critical micelle concentration (cmc) along with various parameters related to the surface adsorption, counter-ion binding (β), and polarity of the cores of the micelles were deduced employing surface tension measurements, conductometric titrations and fluorescence spectroscopy, respectively. A dynamic light scattering (DLS) system equipped with zeta-potential measurement set-up and small-angle neutron scattering (SANS) were used to predict the size, zeta-potential, and morphology, respectively, of the formed micelles. Thermodynamic parameters such as standard Gibb's free energy and standard enthalpy change of micellization were calculated using isothermal titration calorimetry (ITC). Upon comparing with sodium salt analogues, it was established that the micellization was predominantly governed by the extent of hydration of [Cho]+, the head groups of the respective anions, and the degree of counter-ion binding (β). Considering the concentration dependence of the enzyme-SAIL interactions, aqueous solutions of the synthesized SAILs at two different concentrations (below and above the cmc) were utilized as the medium for testing the enzymatic activity of cellulase. The activity of cellulase was found to be ∼7- to ∼13-fold higher compared to that observed in buffers in monomeric solutions of the SAILs and followed the order: [Cho][Sar] > [Cho][DS] > [Cho][Doc]. In the micellar solution, a ∼4- to 5-fold increase in enzymatic activity was observed.
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Affiliation(s)
- Manpreet Singh
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Gurbir Singh
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Harmandeep Kaur
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Muskan
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
| | - Sugam Kumar
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Vinod Kumar Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Tejwant Singh Kang
- Department of Chemistry, UGC-Centre for Advance Studies - II, Guru Nanak Dev University, Amritsar, 143005, India.
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Verma C, Quraishi M, Rhee K. Hydrophilicity and hydrophobicity consideration of organic surfactant compounds: Effect of alkyl chain length on corrosion protection. Adv Colloid Interface Sci 2022; 306:102723. [DOI: 10.1016/j.cis.2022.102723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 06/09/2022] [Accepted: 06/22/2022] [Indexed: 11/01/2022]
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Haque MA, Mahbub S, Rahman MM, Hoque MA, Kumar D, Alsaiari NS, Wabaidur SM, Alsubaie FM. Interaction of cationic surfactant with acid yellow dye in absence/presence of organic and inorganic additives: conductivity and dye solubilization methods. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2021-3068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Abstract
In the present study, the conductometric and dye-solubilization techniques have been utilized to investigate the interaction between an anionic dye (acid yellow 23 [AY]) and a cationic surfactant (cetyltrimethylammonium bromide [CTAB]) in presence of organic (ethanol)/inorganic (NaCl) additives. From the conductometric method, two critical micelle concentrations (cmc) were found for AY + CTAB mixture in an aqueous system and the cmc values were found to undergo a change with the variation of AY concentrations. The cmc values of AY + CTAB systems were observed higher in the alcoholic medium, while the same was found to be lower in the NaCl solutions. The change in cmc of AY + CTAB systems shows an U-like curve with an increase of temperature. The negative free energy of micellization (
Δ
G
m
o
${\Delta}{G}_{m}^{o}$
) for the AY + CTAB systems has indicated a spontaneous micelle formation in all of the cases studied. The enthalpy (
Δ
H
m
o
${\Delta}{H}_{m}^{o}$
), as well as the entropy of micellization (
Δ
S
m
o
${\Delta}{S}_{m}^{o}$
) for the AY + CTAB systems, were assessed and discussed with proper reasoning. Additionally, the enthalpy-entropy compensation parameters were also investigated and illustrated. The solubility of AY and C
D was observed to rise linearly with an increase in the concentration of CTAB/NaCl solution. The solubilization capacity (χ) of AY, the molar partition coefficient (K
M) amongst the micellar and the aqueous phase, and free energy of solubilization (
Δ
G
S
o
${\Delta}{G}_{S}^{o}$
) were evaluated and discussed in detail. The former parameters undergo an increase with an increase of NaCl concentrations.
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Affiliation(s)
- Md. Ariful Haque
- Department of Chemistry , Jahangirnagar University , Savar , Dhaka - 1342 , Bangladesh
| | - Shamim Mahbub
- Department of Chemistry & Physics , Gono Bishwabidyalay , Savar , Dhaka - 1344 , Bangladesh
| | - Mohammad Majibur Rahman
- Department of Environmental Sciences , Jahangirnagar University , Savar , Dhaka - 1342 , Bangladesh
| | - Md. Anamul Hoque
- Department of Chemistry , Jahangirnagar University , Savar , Dhaka - 1342 , Bangladesh
| | - Dileep Kumar
- Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University , Ho Chi Minh City , Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University , Ho Chi Minh City , Vietnam
| | - Norah Salem Alsaiari
- Department of Chemistry , College of Science, Princess Nourah bint Abdulrahman University , Riyadh 11671 , Saudi Arabia
| | - Saikh M. Wabaidur
- Advanced Materials Research Chair, Chemistry Department , College of Science, King Saud University , Riyadh 11451 , Saudi Arabia
| | - Fehaid Mohammed Alsubaie
- National Center for Chemical Catalysis, King Abdulaziz City for Science and Technology , P.O. Box 6086 , Riyadh 11442 , Saudi Arabia
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Ali MA, Amin MR, Mahbub S, Hossen MD, Hoque MA, Kumar D. Impact of salts on the phase separation and thermodynamic properties of mixed nonionic surfactants in absence/attendance of polyvinyl alcohol. Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2021-3013] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Abstract
Mixed surfactant systems are used in different applied fields like pharmaceutical formulation rather than single surfactant. Therefore, the determination of the clouding nature of the triton X-100 (TX-100) + Tween 80 (TW-80) mixture was carried out in H2O and polyvinyl alcohol (PVA). In the occurrence of PVA, the cloud point (CP) values of TX-100 initially enhance with enhancing the concentration of PVA and tend to decrease after a certain concentration. For different ratios of TX-100 and TW-80 mixture having the same concentration of both solutions, CP values increase through the decreasing ratios of TX-100 with/without PVA. In the presence of polymer, at higher ratios of TX-100 than TW-80, the CP values are higher in magnitudes in comparison to the aqueous medium but at lower ratios of TX-100, the value of CP are lower in magnitudes in comparison to the aqueous system. The CP values of the TX-100 + TW-80 mixture in the salt system are lower in magnitudes than the aqueous medium in both the absence/presence of PVA. However, a reduction of CP values was obtained to a large extent for Na2SO4 over NaCl in the case of lower volume ratios of TX-100. Various thermodynamic variables (standard free energy (
Δ
G
c
o
${\Delta}{G}_{c}^{o}$
), standard enthalpy (
Δ
H
c
o
${\Delta}{H}_{c}^{o}$
), standard entropy (
Δ
S
c
o
${\Delta}{S}_{c}^{o}$
) change, thermodynamic parameters of transfer (free energy of transfer (
Δ
G
c
,
t
o
${\Delta}{G}_{c,t}^{o}$
), and transfer of enthalpies (
Δ
H
c
,
t
o
${\Delta}{H}_{c,t}^{o}$
)) of phase transition) were also determined.
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Affiliation(s)
- Md. Ackas Ali
- Department of Chemistry , Jahangirnagar University , Savar , Dhaka , 1342 , Bangladesh
| | - Md. Ruhul Amin
- Department of Chemistry , Jahangirnagar University , Savar , Dhaka , 1342 , Bangladesh
- Department of Chemistry & Physics , Gono Bishwabidyalay , Savar , Dhaka , 1344 , Bangladesh
| | - Shamim Mahbub
- Department of Chemistry & Physics , Gono Bishwabidyalay , Savar , Dhaka , 1344 , Bangladesh
| | - Md. Delwar Hossen
- Department of Chemistry , Mawlana Bhashani Science and Technology University , Santosh , Tangail , 1902 , Bangladesh
| | - Md. Anamul Hoque
- Department of Chemistry , Jahangirnagar University , Savar , Dhaka , 1342 , Bangladesh
| | - Dileep Kumar
- Division of Computational Physics , Institute for Computational Science, Ton Duc Thang University , Ho Chi Minh City , Vietnam
- Faculty of Applied Sciences , Ton Duc Thang University , Ho Chi Minh City , Vietnam
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Kasraei R, Malakootian M, Mohamadi M. Synthesis of Fe3O4 nanoparticles @Trioctylmethylammonium thiosalicylat (TOMATS) as a new magnetic nanoadsorbent for adsorption of ciprofloxacin in aqueous solution. Z PHYS CHEM 2020. [DOI: 10.1515/zpch-2019-1585] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Abstract
The aim of this research was to investigate ciprofloxacin (CIP) removal efficiency from aqueous solutions by using Fe3O4 nanoparticles @Trioctylmethylammonium thiosalicylat Ionic liquid (Fe3O4 NP@ TOMATS IL) as a new magnetic nanoadsorbent. The adsorbent was characterized by field emission scanning electron microscope-energy dispersive spectroscopy (FESEM-EDS), mapping, Fourier transform infrared spectroscopy (FT-IR), the Brunauer–Emmett–Teller (BET), X-ray powder diffraction (XRD). The effects of solution pH, adsorbent dose, contact time, initial CIP concentration, and temperature on CIP removal were also investigated. In optimal conditions such as pH = 5.6, CIP concentration = 30 mg/L, adsorbent dose = 0.15 g, temperature = 30 °C, contact time = 90 min, the removal efficiency in synthetic and real wastewater were obtained 87 and 73%, respectively. Batch experiments were carried out to study the sorption Kinetics, thermodynamics, and equilibrium isotherms of CIP with magnetic nanoadsorbent. The results show that all of the above factors influence CIP removal. The Langmuir adsorption isotherm fits the adsorption process well, with the pseudo second-order model describing the adsorption kinetics accurately. The thermodynamic parameters indicate that adsorption is mainly physical adsorption. Recycling experiments revealed that the behavior of adsorbent is maintained after recycling for four times.
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Affiliation(s)
- Ruhollah Kasraei
- Environmental Health Engineering Research Center , Kerman University of Medical Sciences , Kerman, 7616913555 , Iran
- Department of Environmental Health , School of Public Health, Kerman University of Medical Sciences , Kerman, 7616913555 , Iran
| | - Mohammad Malakootian
- Environmental Health Engineering Research Center , Kerman University of Medical Sciences , Kerman, 7616913555 , Iran
- Department of Environmental Health , School of Public Health, Kerman University of Medical Sciences , Kerman, 7616913555 , Iran
| | - Maryam Mohamadi
- Pistachio Safety Research Center , Rafsanjan University of Medical Sciences , Rafsanjan , Iran
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