Study of Sorption of Triphenylmethane Dyes on a Magnetic Carrier Bearing an Immobilized Copper Phthalocyanine Dye

Ivo Šafařík; Miroslava Šafaříková; Naděžda Vrchotová

doi:10.1135/cccc19950034

Study of Sorption of Triphenylmethane Dyes on a Magnetic Carrier Bearing an Immobilized Copper Phthalocyanine Dye

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19950034 ◽

1995 ◽

Vol 60 (1) ◽

pp. 34-42 ◽

Cited By ~ 15

Author(s):

Ivo Šafařík ◽

Miroslava Šafaříková ◽

Naděžda Vrchotová

Keyword(s):

Copper Phthalocyanine ◽

Copper Ion ◽

Amino Group ◽

Adsorption Model ◽

Amino Groups ◽

Triphenylmethane Dyes ◽

Sorbate Molecule ◽

Adsorption Capacities ◽

Magnetite Particles ◽

Two Parameters

Magnetite particles bearing covalently immobilized copper phthalocyanine dye ("blue magnetite") were prepared and used for the sorption of triphenylmethane dyes from aqueous solutions. The binding of some triphenylmethane dyes bearing two or three amino groups (basic fuchsin, crystal violet, malachite green) followed the Langmuir adsorption model. The maximum adsorption capacities were calculated. Dyes having no amino group in their molecules exhibited only low adsorption to immobilized copper phthalocyanine. The presence of amino groups in the molecules of triphenylmethane dyes seems to be necessary for their efficient binding on blue magnetite. Generally, efficient sorption of the organic compounds to immobilized copper phthalocyanine may be conditional on a cooperative effect of two parameters, viz. a certain planarity of the sorbate molecule and interaction of the central copper ion of the phthalocyanine molecule with the sorbate amino group or heterocyclic nitrogen atom.

Combined Influence of Low-Grade Metakaolins and Natural Zeolite on Compressive Strength and Heavy Metal Adsorption of Geopolymers

Minerals ◽

10.3390/min11050486 ◽

2021 ◽

Vol 11 (5) ◽

pp. 486

Author(s):

Alcina Johnson Sudagar ◽

Slávka Andrejkovičová ◽

Fernando Rocha ◽

Carla Patinha ◽

Maria R. Soares ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Compressive Strength ◽

Natural Zeolite ◽

Metal Adsorption ◽

Low Grade ◽

Heavy Metal Adsorption ◽

Adsorption Model ◽

X Ray ◽

Adsorption Capacities

Metakaolins (MKs) prepared from low-grade kaolins located in the Alvarães (A) and Barqueiros (B) regions of Portugal were used as the aluminosilicate source to compare their effect on the compressive strength and heavy metal adsorption of geopolymers. Natural zeolite, an inexpensive, efficient adsorbent, was used as an additive in formulations to enhance geopolymers’ adsorption capacities and reduce MK utilization’s environmental footprint. Geopolymers were synthesized with the replacement of MK by zeolite up to 75 wt.% (A25, B25—25% MK 75% zeolite; A50, B50—50% MK 50% zeolite; A75, B75—75% MK 25% zeolite; A100, B100—100% MK). The molar ratios of SiO2/Al2O3 and Na2O/Al2O3 were kept at 1 to reduce the sodium silicate and sodium hydroxide environmental impact. Geopolymers’ crystallography was identified using X-ray diffraction analysis. The surface morphology was observed by scanning electron microscopy to understand the effect of zeolite incorporation. Chemical analysis using X-ray fluorescence spectroscopy and energy dispersive X-ray spectroscopy yielded information about the geopolymers’ Si/Al ratio. Compressive strength values of geopolymers obtained after 1, 14, and 28 days of curing indicate high strengths of geopolymers with 100% MK (A100—15.4 MPa; B100—32.46 MPa). Therefore, zeolite did not aid in the improvement of the compressive strength of both MK-based geopolymers. The heavy metal (Cd2+, Cr3+, Cu2+, Pb2+, and Zn2+) adsorption tests exhibit relatively higher adsorption capacities of Barqueiros MK-based geopolymers for all the heavy metals except Cd2+. Moreover, zeolite positively influenced divalent cations’ adsorption on the geopolymers produced from Barqueiros MK as B75 exhibits the highest adsorption capacities, but such an influence is not observed for Alvarães MK-based geopolymers. The general trend of adsorption of the heavy metals of both MK-based geopolymers is Pb2+ > Cd2+ > Cu2+ > Zn2+ > Cr3+ when fitted by the Langmuir isotherm adsorption model. The MK and zeolite characteristics influence geopolymers’ structure, strength, and adsorption capacities.

Investigation of the effect of ring size on the product distribution for the Schiff base reaction of 2-acetylcycloalkanones with diamino alkanes

Canadian Journal of Chemistry ◽

10.1139/v95-004 ◽

1995 ◽

Vol 73 (1) ◽

pp. 16-21 ◽

Cited By ~ 9

Author(s):

Raul G. Enriquez ◽

Juan M. Fernandez-G ◽

Ismael Leon ◽

William F. Reynolds ◽

Ji.-Ping Yang ◽

...

Keyword(s):

Schiff Base ◽

Condensation Reaction ◽

2D Nmr ◽

Product Distribution ◽

Major Product ◽

Ring Size ◽

Amino Group ◽

Amino Groups ◽

Removal of Organic Compounds with an Amino Group during the Nanofiltration Process

Membranes ◽

10.3390/membranes12010058 ◽

2021 ◽

Vol 12 (1) ◽

pp. 58

Author(s):

Renata Żyłła ◽

Magdalena Foszpańczyk ◽

Magdalena Olak-Kucharczyk ◽

Joanna Marszałek ◽

Stanisław Ledakowicz

Keyword(s):

Organic Compounds ◽

Natural Organic Matter ◽

Oxidation Product ◽

Membrane Filtration ◽

Separation Efficiency ◽

Ph Value ◽

Oxidation Products ◽

Low Molecular Weight ◽

Amino Group ◽

Amino Groups

The research covered the process of nanofiltration of low molecular weight organic compounds in aqueous solution. The article presents the results of experiments on membrane filtration of compounds containing amino groups in the aromatic ring and comparing them with the results for compounds without amino groups. The research was carried out for several commercial polymer membranes: HL, TS40, TS80, DL from various manufacturers. It has been shown that the presence of the amino group and its position in relation to the carboxyl group in the molecule affects the retention in the nanofiltration process. The research also included the oxidation products of selected pharmaceuticals. It has been shown that 4-Amino-3,5-dichlorophenol—a oxidation product of diclofenac and 4-ethylbenzaldehyde—a oxidation product of IBU, show poor separation efficiency on the selected commercial membranes, regardless of the pH value and the presence of natural organic matter (NOM). It has been shown that pre-ozonation of natural river water can improve the retention of pollutants removed.

Anomalous phase behavior in blends of -SO3H terminated polystyrene with poly(n-butyl acrylate) containing a small amount of tertiary amino groups

e-Polymers ◽

10.1515/epoly.2008.8.1.917 ◽

2008 ◽

Vol 8 (1) ◽

Author(s):

Kenji Yamamoto ◽

Ayumi Nanakno ◽

Hiroyasu Masunaga ◽

Isamu Akiba

Keyword(s):

Butyl Acrylate ◽

Stoichiometric Composition ◽

Phase Region ◽

Molar Ratio ◽

Amino Group ◽

Amino Groups ◽

Two Phase ◽

Dimethylaminoethyl Methacrylate ◽

X Ray Scattering ◽

Tertiary Amino

Abstract Phase behavior in the blend of -SO3H terminated polystyrene (PSS) with poly(n-butyl acrylate-co-N,N-dimethylaminoethyl methacrylate) containing 6.0 mol% N,N-dimethylaminoethyl methacrylate (P1) is investigated by optical microscopy and small-angle X-ray scattering (SAXS). Comparing the miscibility of polystyrene/P1 blend, it is confirmed that the miscibility of the PSS/P1 blend is drastically improved by the hydrogen bonds between -SO3H and tertiary amino group. In addition, two-phase region of the PSS/P1 blend is split into two regions around the stoichiometric composition, in which the molar ratio of -SO3H to tertiary amino group is 1:1 stoichiometry. SAXS result shows that the PSS/P1 blend at stoichiometric composition forms a block copolymer-like aggregate and it takes a disorder state.

pKa-Werte von Ethidiumbromid und 7-Amino-9-phenyl-10- äthyl-phenanthridinium-bromid / pKa-Values of Ethidiumbromide and 7-Amino-9-phenyl-10-ethyl-phenanthridinium- bromide

Zeitschrift für Naturforschung C ◽

10.1515/znc-1976-11-1205 ◽

1976 ◽

Vol 31 (11-12) ◽

pp. 656-660 ◽

Cited By ~ 12

Author(s):

Ingfried Zimmermann ◽

Herbert Zimmermann

Keyword(s):

Electronic Spectra ◽

Water Solution ◽

Ph Dependence ◽

Quantum Mechanical ◽

Amino Group ◽

Quantum Mechanical Calculations ◽

Acidic Water ◽

Amino Groups ◽

Electronic Density ◽

Decreasing Ph

Abstract Ethidiumbromide (1) has two amino groups in 2-and 7-position which are protonated in acidic water solution. Both pKa-values of 1 are determined at 20 °C by means of the pH-dependence of the electronic spectra using a iterative calculating procedure, pKa1 = 0.713, pKa2 = 2.43. Acetylation of 1 and quantum mechanical calculations lead to the conclusion that the electronic density at the 7-amino group is greater than in 2-position. Therefore with decreasing pH preferably the 7-amino group is protonated (pKa2). followed by the protonation of the 2-amino group (pKa1). The pKa of 7-amino-9-phenyl-10-ethyl-phenanthridinium-bromide in water solution at 20 °C is determined to pKa= 1 .2 5 .

The preparation of calcium phosphate adsorbent from natural calcium resource and its application for copper ion removal

Environmental Science and Pollution Research ◽

10.1007/s11356-020-10585-7 ◽

2020 ◽

Vol 28 (2) ◽

pp. 1725-1733

Author(s):

Marta Kalbarczyk ◽

Aleksandra Szcześ ◽

Dariusz Sternik

Keyword(s):

Electrostatic Interactions ◽

Copper Ion ◽

Environmentally Friendly ◽

Material Surface ◽

Hydroxyl Groups ◽

Order Kinetic ◽

Adsorption Model ◽

Ion Removal ◽

Developed Surface ◽

Order Kinetic Model

AbstractUsing the hen eggshells (biowaste) as a source of calcium and an environmentally friendly approach, the nanopowder composed of 74% of hydroxyapatite (HA) and 26% of β–tricalcium phosphate (β-TCP) was obtained. Due to the maximum reduction of the stages associated with the use of chemicals and energy, this method can be considered as economically and environmentally friendly. A well-developed surface area and the negative zeta potential at pH above 3.5 indicate good adsorption properties of this material. The obtained material shows high adsorption capacity towards Cu2+ ions, i.e. 105.4 mg/g at pH 5. Good fit of the Langmuir adsorption model and the pseudo-second-order kinetic model may indicate chemical adsorption probably due to the electrostatic interactions between the Cu2+ cations and the negatively charged phosphate and hydroxyl groups on the material surface.

Effect of cross-linking agents on insulin associated responses in adipocytes

Canadian Journal of Biochemistry ◽

10.1139/o82-127 ◽

1982 ◽

Vol 60 (10) ◽

pp. 987-1000 ◽

Cited By ~ 2

Author(s):

H. Joseph Goren ◽

C. Ronald Kahn

Keyword(s):

Insulin Receptor ◽

Glucose Transport ◽

Free Amino ◽

Glucose Oxidation ◽

Insulin Binding ◽

Cross Linking ◽

Amino Group ◽

Amino Groups ◽

Disuccinimidyl Suberate ◽

Reactive Groups

The effect of 10 bifunctional cross-linking agents and four monofunctional analogues was studied on isolated adipocytes. [125I]Insulin binding and degradation, basal and insulin-stimulated glucose oxidation, and 3-O-methyl glucose uptake were measured. Two cross-linkers, which possess succinimide ester residues (disuccinimidyl suberate and dithiobis(succinimidyl propionate)) and react selectively with amino groups, appeared to react relatively specifically with the insulin receptor. Both produced a slight stimulation of basal glucose transport and metabolism, a marked inhibition of insulin-stimulated glucose transport and metabolism, and a marked decrease in insulin binding. Pretreatment of cells with unlabelled insulin partially blocked the effect of disuccinimidyl suberate, and as has been previously shown, disuccinimidyl suberate cross-linked insulin to its receptor. A monofunctional analogue of these compounds was 100-fold less active in altering cellular metabolic activity. Bisimidates, such as dimethyl suberimidate, dimethyl adipimidate, and dimethyl dithiobispropionimidate, also react with free amino groups but are more hydrophilic. These agents produced similar effects on glucose oxidation as the succinimide esters, but had little or no effect on insulin binding. The effects of these agents are not blocked by insulin and they do not cross-link insulin to its receptor. Mixed bifunctional reagents containing either a succinimide ester or an imidate and a group which reacts with thiols produced effects similar to the cross-linkers containing two succinimide groups or bisimidates, respectively. The bifunctional arylating agents difluorodinitrobenzene and bis(fluoronitrophenyl)sulfone produce marked effects on insulin binding and glucose oxidation at micromolar concentrations, but the monofunctional analogue fluorodinitrobenzene is almost equally active suggesting that with these compounds chemical modifications and not cross-linking was important. With neither the mixed bifunctional reagents, nor the arylating agents, did insulin pretreatment alter the effect of cross-linker and none of these agents cross-linked [125I]insulin to its receptor. These data suggest that the insulin receptor possesses a free amino group in a hydrophobic environment in its active site. A reactive amino group in a hydrophilic environment as well as other reactive groups are also present in some component of the insulin receptor–effector complex. Chemical modification or cross-linking of these functional groups results in an inhibition or mimicking of insulin action. Further study will be required to identify the exact locus of these sites.

Isoelectric points of erabutoxins and monoacyl derivatives of erabutoxin b. Estimation of the pK values of amino groups in erabutoxins by using isoelectric-focusing data

Biochemical Journal ◽

10.1042/bj2030427 ◽

1982 ◽

Vol 203 (2) ◽

pp. 427-433 ◽

Cited By ~ 2

Author(s):

N UI ◽

C Takasaki ◽

N Tamiya

Keyword(s):

Isoelectric Focusing ◽

Isoelectric Point ◽

Amino Group ◽

Amino Groups ◽

Sea Snake ◽

Isoelectric Points ◽

Point Data ◽

Laticauda Semifasciata ◽

Erabutoxin B ◽

Derivatives Of

The isoelectric points of erabutoxins a, b and c, neurotoxic proteins of a sea snake, Laticauda semifasciata, were determined by density-gradient isoelectric focusing. The same measurement was also made with monoacyl derivatives of erabutoxin b, in which each one of all amino groups had been either acetylated or propionylated. Erabutoxins a and b showed the same isoelectric point at pH 9.68. The values for [1-N alpha-acetyl-arginine]-, [15-N6-acetyl-lysine]-, [27-N6-acetyl-lysine]-, [47-N6-propionyl-lysine]- and [51-N6-acetyl-lysine]-erabutoxin b were at pH 9.52, 9.31, 9.45, 9.22 and 9.09 respectively, being definitely different from each other and lower than the value for the unmodified molecule. The isoelectric point of erabutoxin c, which is [51-asparagine]-erabutoxin b, was the same as that of [51-N6-acetyl-lysine]erabutoxin b. Assuming that no change in pK occurs on monoacylation, the pK values of amino groups in erabutoxin b were calculated from the isoelectric-point data. It is indicated that the pK values of zeta-amino groups differ markedly from each other and that the value of alpha-amino group is anomalously high.

The configuration of 2,6-diamino-3-hydroxypimelic acid in microbial cell walls

Biochemical Journal ◽

10.1042/bj1150797 ◽

1969 ◽

Vol 115 (4) ◽

pp. 797-805 ◽

Cited By ~ 9

Author(s):

H R Perkins

Keyword(s):

Cell Wall ◽

Hydroxy Group ◽

Cell Walls ◽

Optical Rotation ◽

Periodate Oxidation ◽

Ring Closure ◽

Diaminopimelic Acid ◽

Amino Group ◽

Amino Groups ◽

Peptide Linkage

β-Hydroxydiaminopimelic acid, together with some diaminopimelic acid, occurs in the cell-wall mucopeptide of certain Actinomycetales. These components were converted into their di-DNP derivatives and separated by chromatography. Hence the relative proportions present in the cell walls of a number of species were measured. The problem of acid-induced inversion of configuration was studied. Of the diaminohydroxypimelic acids isomer B (see Scheme 2; amino groups meso, hydroxy group threo to its neighbouring amino group) always predominated but a small proportion of isomer D (amino groups l, hydroxy group erythro) also occurred. The configuration of the diaminohydroxypimelic acids was determined by periodate oxidation to glutamic γ-semialdehyde, which underwent spontaneous ring-closure. Reduction with sodium borohydride produced optically active proline, the configuration of which was determined by direct measurement of the optical rotation of DNP-proline. Un-cross-linked diaminohydroxypimelic acid in the cell wall was oxidized with periodate in the presence of ammonia. Since the remaining amino group was bound in peptide linkage, ring-closure was prevented and borohydride reduction of the aldehyde–ammonia presumed to be present resulted in the formation of ornithine. The quantity of ornithine was used as a measure of the degree of cross-linking.

Preparation of Poly(allylamine)-Silica Composites and Adsorption Performance for Heavy Metal Ions

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.955-959.135 ◽

2014 ◽

Vol 955-959 ◽

pp. 135-139

Author(s):

Zhong Lei Fan ◽

Li Wen Wang ◽

Da Zhuang Liu

Keyword(s):

Heavy Metal ◽

Structural Analysis ◽

Coupling Agent ◽

Heavy Metal Ions ◽

Copper Ion ◽

Adsorption Properties ◽

Experimental Conditions ◽

Adsorption Performance ◽

Adsorption Capacities ◽

Excellent Stability

Poly (allylamine)-silica composites (PAA/SiO2) was prepared via CPTCS as coupling agent and PAA as modifier. The structure and adsorption properties of silica gel, CPTCS-SiO2 and PAA/SiO2 were determinated by FTIR, structural analysis, TG analysis and adsorption test. The results show that PAA/SiO2 had excellent adsorption capacities for Cu (II), Pb (II) and Ni (II) in aqueous solutions. Its adsorption capacities can reach 0.972mmol/g for copper ion at experimental conditions. Besides, PAA/SiO2 also possessed excellent stability in the flow tests.