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Article ; Online: Polypyrrole-decorated bentonite magnetic nanocomposite: A green approach for adsorption of anionic methyl orange and cationic crystal violet dyes from contaminated water.

Ahamad, Zeeshan / Nasar, Abu

2024 Volume 247, Page(s) 118193

Abstract: In the presented study, a novel polypyrrole-decorated bentonite magnetic nanocomposite (MBnPPy) was synthesized for efficient removal of both anionic methyl orange (MO) and cationic crystal violet (CV) dyes from contaminated water. The synthesis of this ... ...

Abstract	In the presented study, a novel polypyrrole-decorated bentonite magnetic nanocomposite (MBnPPy) was synthesized for efficient removal of both anionic methyl orange (MO) and cationic crystal violet (CV) dyes from contaminated water. The synthesis of this novel adsorbent involved a two-step process: the magnetization of bentonite followed by its modification through in-situ chemical polymerization. The adsorbent was characterized by SEM/EDX, TEM/SAED, BET, TGA/DTA-DTG, FTIR, VSM, and XRD studies. The investigation of the adsorption properties of MBnPPy was focused on optimizing various parameters, such as dye concentration, medium pH, dosage, contact time, and temperature. The optimal conditions were established as follows: dye concentration of C
MeSH term(s)	Coloring Agents/chemistry ; Adsorption ; Polymers ; Gentian Violet/chemistry ; Bentonite/chemistry ; Pyrroles ; Water/chemistry ; Nanocomposites ; Magnetic Phenomena ; Water Pollutants, Chemical/analysis ; Hydrogen-Ion Concentration ; Kinetics ; Azo Compounds
Chemical Substances	Coloring Agents ; polypyrrole (30604-81-0) ; Polymers ; Gentian Violet (J4Z741D6O5) ; Bentonite (1302-78-9) ; methyl orange (6B4TC34456) ; Pyrroles ; Water (059QF0KO0R) ; Water Pollutants, Chemical ; Azo Compounds
Language	English
Publishing date	2024-01-14
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	205699-9
ISSN	1096-0953 ; 0013-9351
ISSN (online)	1096-0953
ISSN	0013-9351
DOI	10.1016/j.envres.2024.118193
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Article ; Online: Correlation between standard enthalpy of formation, structural parameters and ionicity for alkali halides

Nasar Abu

Journal of the Serbian Chemical Society, Vol 78, Iss 2, Pp 241-

2013 Volume 253

Abstract: The standard enthalpy of formation (ΔHo) has been considered to be an interesting and useful parameter for the correlation of various properties of alkali halides. The interrelation between ΔHo and structural parameters for the halides of Li, Na, K and ... ...

Abstract	The standard enthalpy of formation (ΔHo) has been considered to be an interesting and useful parameter for the correlation of various properties of alkali halides. The interrelation between ΔHo and structural parameters for the halides of Li, Na, K and Rb has been thoroughly analyzed. When cationic component element is kept constant in a homologous series of alkali halides, the negative value of ΔHo has been observed to decrease linearly with increase of interionic distance (d) and accordingly following empirical equation ΔHo = α + βd (where α and β are empirical constants) has been established. However, for common anionic series of alkali halides an opposite nonlinear trend has been observed with the exception of common fluorides. The correlation study on the standard enthalpy of formation has been extended in term of radius ratio and also discussed in the light of ionization energy of the metal, electron affinity of the halogen, size of the ions, ionic character of bond and lattice energy of the compound.
Keywords	Thermodynamic properties ; exothermicity ; interionic distance ; radius ratio ; interrelation ; Chemistry ; QD1-999
Subject code	541
Language	English
Publishing date	2013-01-01T00:00:00Z
Publisher	Serbian Chemical Society
Document type	Article ; Online
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Article ; Online: Walnut shell powder as a low-cost adsorbent for methylene blue dye: isotherm, kinetics, thermodynamic, desorption and response surface methodology examinations.

Uddin, Mohammad Kashif / Nasar, Abu

Scientific reports

2020 Volume 10, Issue 1, Page(s) 7983

Abstract: The low cost, eco-friendly and potential biomass, i.e. walnut (Juglans regia) shell powder was deployed for the removal of toxic methylene blue dye from contaminated water solution. The important characterization of the waste material was conducted by ... ...

Abstract	The low cost, eco-friendly and potential biomass, i.e. walnut (Juglans regia) shell powder was deployed for the removal of toxic methylene blue dye from contaminated water solution. The important characterization of the waste material was conducted by using several techniques, i.e. Scanning electron microscope, Fourier-transform infrared spectroscopy, Energy-dispersive X-ray spectroscopy, X-ray powder diffraction, Brunauer-Emmett-Teller surface area analysis, and Thermogravimetric analysis. The marked impact of various operating conditions, i.e. dose, concentration, time, pH and temperature on the adsorption process was investigated. Increasing pH resulted in an increase of percent dye adsorption, and the adsorption mechanism was occurred by electrostatic attraction between negative adsorbent surface and positive dye molecules. The equilibrium data suited with Langmuir isotherm model while the adsorption practice followed the pseudo-second-order kinetic model. Higher temperature reduced the adsorption of dye molecules. The adsorption process was spontaneous, exothermic and chemical. The critical statistical analysis of the experimental results was directed by forming the design of the experiment, which was further, optimized by ANOVA, 3D and perturbation plots. The error and predicted values of both the studied responses as derived from the statistical model showed the agreeable results. 0.1 N HCl was found to be effective in complete desorption. The results are very practical and prove the effectiveness of walnut shell powder in the usage of decolorization for methylene blue.
Language	English
Publishing date	2020-05-14
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-020-64745-3
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Article ; Online: Facile synthesis of polypyrrole decorated chitosan-based magsorbent: Characterizations, performance, and applications in removing cationic and anionic dyes from aqueous medium.

Mashkoor, Fouzia / Nasar, Abu

International journal of biological macromolecules

2020 Volume 161, Page(s) 88–100

Abstract: The adsorption characteristic of polypyrrole decorated chitosan-based magsorbent (MChs/Ppy) for the elimination of cationic crystal violet and anionic methyl orange dye from wastewater were explored. The characteristics of MChs/Ppy were studied by TGA, ... ...

Abstract	The adsorption characteristic of polypyrrole decorated chitosan-based magsorbent (MChs/Ppy) for the elimination of cationic crystal violet and anionic methyl orange dye from wastewater were explored. The characteristics of MChs/Ppy were studied by TGA, SEM/EDAX, TEM, BET, FTIR, VSM, and XRD analyses. The performance of MChs/Ppy towards the adsorption of CV and MO was investigated by the batch method. Removal performance was obtained to be 88.11 and 92.89% for CV and MO at the optimum conditions. The adsorption of CV was well described by pseudo 2nd order, while that of MO was best followed by the pseudo 1st order kinetics. The adsorption equilibrium data for both the dyes were fitted well with Langmuir adsorption isotherm with the maximum monolayer sorption capacity of 62.89 and 89.29 mg/g for CV and MO, respectively. The negative values of ΔH and ΔF accompanying with the removal of both dyes specified the adsorption process to be exothermic and spontaneous. Regeneration study showed that MChs/Ppy could be reused efficaciously up to three consecutive ad-/de-sorption cycles. The combined benefits of facile synthesis, non-toxicity, and good adsorption potential towards cationic and anionic dyes along with easy magnetic separability make MChs/Ppy as a novel adsorbent.
MeSH term(s)	Adsorption ; Anions/chemistry ; Cations/chemistry ; Chitosan/chemistry ; Coloring Agents/chemistry ; Hydrogen-Ion Concentration ; Polymers/chemical synthesis ; Pyrroles/chemical synthesis ; Spectroscopy, Fourier Transform Infrared ; Thermodynamics ; Water Pollutants, Chemical/chemistry ; Water Purification/methods ; X-Ray Diffraction
Chemical Substances	Anions ; Cations ; Coloring Agents ; Polymers ; Pyrroles ; Water Pollutants, Chemical ; polypyrrole (30604-81-0) ; Chitosan (9012-76-4)
Language	English
Publishing date	2020-06-05
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2020.06.015
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Article: Magnetized Tectona grandis sawdust as a novel adsorbent: preparation, characterization, and utilization for the removal of methylene blue from aqueous solution

Mashkoor, Fouzia / Nasar, Abu

Cellulose. 2020 Mar., v. 27, no. 5

2020

Abstract: In the submitted research work, adsorption characteristic of magnetized Tectona grandis sawdust for methylene blue from aqueous media was explored. The prepared adsorbent was characterized by SEM/EDXS, TEM, BET, XRD, FTIR, TGA-DTG/DTA, VSM, and point of ... ...

Abstract	In the submitted research work, adsorption characteristic of magnetized Tectona grandis sawdust for methylene blue from aqueous media was explored. The prepared adsorbent was characterized by SEM/EDXS, TEM, BET, XRD, FTIR, TGA-DTG/DTA, VSM, and point of zero charge. To investigate the adsorption capacity and mechanisms prevailing for the adsorption of methylene blue, batch adsorption studies were performed by changing adsorbate/adsorbent contact time, pH, initial dye concentration, and temperature. The removal efficiency was found to be 90.8% under the optimized adsorption conditions. The optimal process parameters were 1 g/L of magnetized adsorbent, 60 min contact time, pH 8, and temperature of 30 °C for 100 mg/L MB solution. The laboratory generated adsorption data was best conformed by pseudo-second-order kinetics and Langmuir adsorption isotherm models. The maximum monolayer adsorption capacity was determined to be 172.41 mg/g. The adsorption process was established to be thermodynamically feasible and accompanying with the absorption of heat and escalation of entropy. Regeneration study revealed that magnetized Tectona grandis sawdust could be reused efficaciously up to four repeated adsorption–desorption cycles using HCl as the best desorbing agent. The magnetized Tectona grandis sawdust has been proved to be novel, efficient, and cost-effective adsorbent. The combined advantages of easy preparation, good affinity towards dyes, excellent separability, reusability, and cost-effectiveness of magnetized Tectona grandis sawdust make it a novel adsorbent.
Keywords	Fourier transform infrared spectroscopy ; Tectona grandis ; X-ray diffraction ; absorption ; adsorbents ; adsorption ; aqueous solutions ; cost effectiveness ; differential thermal analysis ; entropy ; heat ; hydrochloric acid ; methylene blue ; models ; pH ; sawdust ; scanning electron microscopy ; sorption isotherms ; temperature ; thermogravimetry ; transmission electron microscopy
Language	English
Dates of publication	2020-03
Size	p. 2613-2635.
Publishing place	Springer Netherlands
Document type	Article
ZDB-ID	1496831-9
ISSN	1572-882X ; 0969-0239
ISSN (online)	1572-882X
ISSN	0969-0239
DOI	10.1007/s10570-019-02918-8
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Article: Facile synthesis of polypyrrole decorated chitosan-based magsorbent: Characterizations, performance, and applications in removing cationic and anionic dyes from aqueous medium

Mashkoor, Fouzia / Nasar, Abu

International journal of biological macromolecules. 2020 Oct. 15, v. 161

2020

Abstract	The adsorption characteristic of polypyrrole decorated chitosan-based magsorbent (MChs/Ppy) for the elimination of cationic crystal violet and anionic methyl orange dye from wastewater were explored. The characteristics of MChs/Ppy were studied by TGA, SEM/EDAX, TEM, BET, FTIR, VSM, and XRD analyses. The performance of MChs/Ppy towards the adsorption of CV and MO was investigated by the batch method. Removal performance was obtained to be 88.11 and 92.89% for CV and MO at the optimum conditions. The adsorption of CV was well described by pseudo 2nd order, while that of MO was best followed by the pseudo 1st order kinetics. The adsorption equilibrium data for both the dyes were fitted well with Langmuir adsorption isotherm with the maximum monolayer sorption capacity of 62.89 and 89.29 mg/g for CV and MO, respectively. The negative values of ΔH and ΔF accompanying with the removal of both dyes specified the adsorption process to be exothermic and spontaneous. Regeneration study showed that MChs/Ppy could be reused efficaciously up to three consecutive ad−/de-sorption cycles. The combined benefits of facile synthesis, non-toxicity, and good adsorption potential towards cationic and anionic dyes along with easy magnetic separability make MChs/Ppy as a novel adsorbent.
Keywords	adsorbents ; adsorption ; gentian violet ; heat production ; magnetism ; methyl orange ; pyrroles ; sorption isotherms ; wastewater
Language	English
Dates of publication	2020-1015
Size	p. 88-100.
Publishing place	Elsevier B.V.
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2020.06.015
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Article ; Online: Degradative treatment of bispyribac sodium herbicide from synthetically contaminated water by colloidal MnO

Qamruzzaman / Nasar, Abu

Environmental technology

2017 Volume 40, Issue 4, Page(s) 451–457

Abstract: Bispyribac sodium (BS) is one of the most commonly used herbicides used to kill selectively unwanted herbs particularly in rice plantation. However, the increasing use of herbicides in agricultural field is associated with a potential risk to water ... ...

Abstract	Bispyribac sodium (BS) is one of the most commonly used herbicides used to kill selectively unwanted herbs particularly in rice plantation. However, the increasing use of herbicides in agricultural field is associated with a potential risk to water resources and aquatic system. Thus, the treatment of such pesticides after fulfillment of their herbicidal activity is of quite interest to minimize the contamination of water. The degradation kinetics of BS from synthetic contaminated water by water-soluble colloidal MnO
MeSH term(s)	Benzoates ; Herbicides ; Pyrimidines ; Sodium ; Sodium Dodecyl Sulfate ; Surface-Active Agents
Chemical Substances	Benzoates ; Herbicides ; Pyrimidines ; Surface-Active Agents ; Sodium Dodecyl Sulfate (368GB5141J) ; Sodium (9NEZ333N27) ; bispyribac (9W20BD966G)
Language	English
Publishing date	2017-11-09
Publishing country	England
Document type	Journal Article
ISSN	1479-487X
ISSN (online)	1479-487X
DOI	10.1080/09593330.2017.1396500
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Article: Wedge resection, segmentectomy, and lobectomy: oncologic outcomes based on extent of surgical resection for ≤2 cm stage IA non-small cell lung cancer.

Al-Thani, Shaikha / Nasar, Abu / Villena-Vargas, Jonathan / Harrison, Sebron / Lee, Benjamin / Port, Jeffrey L / Altorki, Nasser / Chow, Oliver S

Journal of thoracic disease

2024 Volume 16, Issue 3, Page(s) 1875–1884

Abstract: Background: Long-standing controversy has existed over whether sublobar resection is an adequate oncological procedure for clinical stage IA non-small cell lung cancer (NSCLC) ≤2 cm, despite the recent randomized trial reports of Japanese Clinical ... ...

Abstract	Background: Long-standing controversy has existed over whether sublobar resection is an adequate oncological procedure for clinical stage IA non-small cell lung cancer (NSCLC) ≤2 cm, despite the recent randomized trial reports of Japanese Clinical Oncology Group (JCOG) 0802 and Cancer and Leukemia Group B (CALGB) 140503 demonstrating non-inferior outcomes with sublobar resection compared to lobectomy. As practice patterns shift, we sought to compare oncologic outcomes in patients with these early-stage tumors after wedge resection, segmentectomy, or lobectomy in a contemporary, real-world, cohort. Methods: A retrospective review of a prospectively maintained database from a single institution was conducted from 2011 to 2020 to identify all patients with clinically staged IA1 or IA2 NSCLC (tumors ≤2 cm with no nodal involvement). The primary outcomes of interest were overall survival (OS) and disease-free survival (DFS), with secondary outcomes of lung cancer-specific survival (LCSS), recurrence patterns, and perioperative morbidity and mortality. Results: A total of 480 patients were identified; 93 (19.4%) patients underwent wedge resection, 90 (18.7%) received segmentectomy, and 297 (61.9%) underwent lobectomy. Patients who underwent wedge resection had worse Eastern Cooperative Oncology Group (ECOG) performance status (23.7% ECOG 1 or 2 Conclusions: Patients with inferior performance status or lower baseline pulmonary function are more likely to receive wedge resection for clinical stage IA NSCLC ≤2 cm in size. For these small tumors, lobectomy, segmentectomy, and wedge resection provide comparable oncologic outcomes.
Language	English
Publishing date	2024-03-15
Publishing country	China
Document type	Journal Article
ZDB-ID	2573571-8
ISSN	2077-6624 ; 2072-1439
ISSN (online)	2077-6624
ISSN	2072-1439
DOI	10.21037/jtd-23-1693
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Article ; Online: Application of polyaniline-based adsorbents for dye removal from water and wastewater-a review.

Nasar, Abu / Mashkoor, Fouzia

Environmental science and pollution research international

2019 Volume 26, Issue 6, Page(s) 5333–5356

Abstract: Several industries release varying concentration of dye-laden effluent with substantial negative consequences for any receiving environmental compartment. The control of water pollution and tighter restriction on wastewater discharge directly into the ... ...

Abstract	Several industries release varying concentration of dye-laden effluent with substantial negative consequences for any receiving environmental compartment. The control of water pollution and tighter restriction on wastewater discharge directly into the environment to reduce the potential ecotoxicological effect of dyes is forcing processors to retreat and reuse process water and chemicals. Among the different available technologies, the adsorption process has been recognized to be one of the finest and cost-effective wastewater treatment technologies. Various adsorbents have been utilized to remove toxic dyes from water and wastewater. Here, we review the application of polyaniline-based polymeric adsorbent for the adsorption of dyes which have been received considerable attention. To date, various modifications of polyaniline have been explored to improve the adsorption properties. Review on the application of polyaniline for adsorption of dyes has not been present till date. This article provides relevant literature on the application of various polyaniline composites for removing dyes, and their adsorption capacities with their experimental conditions have been compiled. It is evident from the literature survey that polyaniline provides a better opportunity for scientists for the effective removal of various dye.
MeSH term(s)	Adsorption ; Agriculture ; Aniline Compounds/chemistry ; Coloring Agents/chemistry ; Industrial Waste ; Waste Disposal, Fluid/methods ; Waste Water/chemistry ; Water Pollutants, Chemical/chemistry ; Water Pollutants, Chemical/isolation & purification ; Water Purification/methods
Chemical Substances	Aniline Compounds ; Coloring Agents ; Industrial Waste ; Waste Water ; Water Pollutants, Chemical ; polyaniline
Language	English
Publishing date	2019-01-05
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-018-3990-y
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Article: Application of polyaniline-based adsorbents for dye removal from water and wastewater—a review

Nasar, Abu / Mashkoor, Fouzia

Environmental science and pollution research international. 2019 Feb., v. 26, no. 6

2019

Abstract	Several industries release varying concentration of dye-laden effluent with substantial negative consequences for any receiving environmental compartment. The control of water pollution and tighter restriction on wastewater discharge directly into the environment to reduce the potential ecotoxicological effect of dyes is forcing processors to retreat and reuse process water and chemicals. Among the different available technologies, the adsorption process has been recognized to be one of the finest and cost-effective wastewater treatment technologies. Various adsorbents have been utilized to remove toxic dyes from water and wastewater. Here, we review the application of polyaniline-based polymeric adsorbent for the adsorption of dyes which have been received considerable attention. To date, various modifications of polyaniline have been explored to improve the adsorption properties. Review on the application of polyaniline for adsorption of dyes has not been present till date. This article provides relevant literature on the application of various polyaniline composites for removing dyes, and their adsorption capacities with their experimental conditions have been compiled. It is evident from the literature survey that polyaniline provides a better opportunity for scientists for the effective removal of various dye.
Keywords	adsorbents ; adsorption ; cost effectiveness ; dyes ; ecotoxicology ; industry ; pollution control ; polymers ; surveys ; toxicity ; wastewater ; wastewater treatment
Language	English
Dates of publication	2019-02
Size	p. 5333-5356.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-018-3990-y
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