Acid Fuchsine Research Articles

Auto ignition assisted synthesis of magnetic CaFe2O4: Exploring role of fuel molecule and amplest dye dismissal

The present work explores the pioneering use of different fuels for the synthesis of CaFe2O4 (CF) nanopowder through auto-ignition synthesis (AIS) with potential application in the acid fuchsine (AF) dye removal. The results showed significant alternation in structure, morphology, and magnetic properties depending on fuel type. The morphology of the CaFe2O4 nanopowders changed from a rock-like appearance for dextrose to a porous, thick-walled network structure for sucrose. All synthesized particles showed superparamagnetic behavior, with a crystallite size of 9 nm to 16 nm. The different adsorption process parameters, including the solution pH, adsorbent amount, and contact time, were studied and optimized. The Langmuir isotherm well explains the adsorption of AF, and the maximum monolayer capacity of CF-dextrose, CF-xylitol, CF-sorbitol, and CF-sucrose was found to be 788, 1024, 1125, and 1297 mg/g, respectively. The pseudo-second-order (PSO) kinetic model describes the adsorption data and the value of rate constant (k2 = 2.36E-05 for CF-dextrose, 3.11E-05 for CF-xylitol, 2.70E-05 for CF-sorbitol, and 5.36E-05 for CF-sucrose) explain fast adsorption process. Furthermore, the CF nanopowder exhibits better regeneration and reusability capacity after multiple consecutive cycles, and magnetic separation aptitude makes it more convenient to isolate the adsorbent after the adsorption process.

An android smartphone-based digital image colorimeter for detecting acid fuchsine dye in aqueous solutions

An android smartphone-based digital image colorimeter for detecting acid fuchsine dye in aqueous solutions

Adsorption of acid fuchsine dye from wastewater by Mg-ferrite particles.

Adsorption is a widely applied waste water treatment technology, especially for removing micro-pollutants and dyes of industrial effluents. Over the past decade, adsorbing metal oxide micron- and nano-particles have been successfully developed and investigated as adsorbents. In the present research, Mg-ferrite adsorbent particles were synthesized and their properties were fully determined. The pore volume is 0.139cm3/g. The BET analysis reveals a surface area of 94.4m2/g. The porosity is of meso- and microporous nature. The adsorbent was used to adsorb acid fuchsine, an important industrial dye. The equilibrium adsorption capacity was 796.4mg/g, with an adsorption yield of 78.7-82.0%. The adsorption kinetics can be adequately fitted by a pseudo-second-order model. The isotherms of both Langmuir and Freundlich are applicable. The stability, recovery and reuse of the ferrite particles were proven in multi-cycle experiments, and the adsorption activity decreased by less than 3% between the first and fifth cycle. Experimental and fitting results were finally used to design a batch adsorber to remove a given concentration of acid fuchsine from different volumes of wastewater.

Alternating spin-and-spray electrospun scaffold membranes with fractionated MIL-101(Cr) adsorbent for high-performance single-pass dye adsorption process

Adsorption is an attractive process for wastewater treatment, owing to its technical simplicity and ease of implementation. However, the adsorption process is often challenged by unoptimized efficiency, especially when the high-performing adsorbents are compacted into a packed bed column design. Herein, an electrospun nanofibrous porous scaffold is rationally designed to fractionate packing and reduce hydraulic resistance of a chromium benzene dicarboxylate-based metal–organic framework (MIL-101(Cr)) used as an adsorbent for the removal of anionic dyes. The MIL-101(Cr) adsorbent was in situ loaded via a spray-assisted method onto the electrospun scaffold in an alternating spray-and-spin fashion to deconstruct the packing and offer fractionated loading of the adsorbent materials. As compared to its unfractionated counterpart, well-fractionated MIL-101(Cr) exhibited an order of magnitude higher adsorption capacity over time with high dye removal towards Methyl Orange (MO), Acid Fuchsine (AF,) and Rose Bengal (RB). In a single pass filtration experiment, the PAN/MOF(50) ESNF-AS scaffold performed at 8808, 5066, and 7574 Lm−2h−1bar−1 water permeabilities at 2 psi with exceptional > 99 % dye removal for MO, AF, and RB dye, respectively. In addition, the spent MIL-101(Cr) adsorbent in the electrospun scaffold was able to be regenerated by alkaline and acid washing and showed good recyclability, suggesting the chemical and structural robustness of the scaffold design. This approach is highly versatile and can be adopted on different adsorbents to target the removal of different contaminants from wastewaters for a more sustainable future.

Зміни клітинного складу крипт дванадцятипалої кишки щурів під впливом хронічної дії епіхлоргідрину

We studied the changes in the cellular composition of the duodenal’s crypts induced by chronic action of Epichlorohydrin (ECH) and the efficiency of the treatment by Echinacea purpurea (EP) extract and thiotriazoline for possible correction of these changes. On the 15th, 30th and 60th days, rats subjected to ECH, EP and thiotriazoline were removed from the experiment. According to the standard histological technique, sections of duodenum were processed, stained with hematoxylin-eosin, acid fuchsine and picric acid. Chronic exposure to ECH on duodenum led to statistically significant changes in the cellular composition of the crypts, which persisted after the cessation of the action of the chemical. On the 15th day, there was a decrease in the total number of cells in one crypt of the duodenal mucous membrane (MM), the number of columnar epithelial cells, argyrophilic endocrinocytes and Paneth cells in one crypt of the duodenal MM compared with the corresponding indicators in rats of the control group. Administration of EP extract and thiotriazoline on the background of chronic action of ECH prevented the development of negative changes in crypt composition of the duodenal MM.

Facile Synthesis of Matrix‐Free Room‐Temperature Phosphorescent Nitrogen‐Doped Carbon Dots and Their Application as Security Inks

AbstractRoom‐temperature phosphorescent (RTP) nitrogen‐doped carbon dots (N‐CDs) have attracted great interest but their efficiency is usually dependent on a solid matrix. Developing efficient matrix‐free RTP CDs is still a great challenge. Here, a simple strategy is reported to synthesize efficient matrix free RTP N‐CDs from citric acid (CA) and basic fuchsine (BF) via a single step hydrothermal process. The synthesized N‐CDs show strong fluorescence in aqueous solution and the solid state, and the RTP lifetime is long‐lived (51.9 ms at 298 K). The phosphorescence of the N‐CDs is attributed to the formation of an internal hydrogen bonded network by the organic polymers on the surface of the N‐CDs. This reduces the nonradiative transitions of the triplet excitons and mitigates oxygen quenching. The application of N‐CDs as security inks is demonstrated.

Collagen quantification in the ventricular walls of the heart of the common marmoset (Callithrix jacchus).

The excellent adaptability of Callithrix jacchus to life in captivity presents advantages in comparison to other nonhuman primates that are used in experimental models for biomedical research, which explains the increasing scientific interest in investigating the anatomical characteristics of this species. Owing to the relative scarcity of publications on the descriptive morphology of the heart of C. jacchus, the aim of this study was to quantify the presence of collagen in the left and right ventricular myocardium using modified picrosirius red and acid fuchsine colorimetric assays. The myocardium of the right ventricle presented a higher percentage of collagen than that of the left ventricle. No sex-related differences were observed between the groups. Interestingly, the absolute values of collagen were different depending on the method used for quantification (modified picrosirius red vs. acid fuchsine). The level of collagen quantification observed in the ventricular myocardium of C. jacchus was similar to that seen in other nonhuman primates traditionally used in experimental models of cardiac diseases.

Synthesis of multi-organo-functionalized fibrous silica KCC-1 for highly efficient adsorption of acid fuchsine and acid orange II from aqueous solution

Multi-functionalized fibrous silica KCC-1 (MF-KCC-1) bearing amine, tetrasulfide, and thiol groups was synthesized via a post-functionalization method and fully characterized by several methods such as FTIR, FESEM, EDX-Mapping, TEM, and N2 adsorption–desorption techniques. Due to abundant surface functional groups, accessible active adsorption sites, high surface area (572 m2 g−1), large pore volume (0.98 cm3 g−1), and unique fibrous structure, mesoporous MF-KCC-1 was used as a potential adsorbent for the uptake of acid fuchsine (AF) and acid orange II (AO) from water. Different adsorption factors such as pH of the dye solution, the amount of adsorbent, initial dye concentration, and contact time, affecting the uptake process were optimized and isotherm and kinetic studies were conducted to find the possible mechanism involved in the process. For both AF and AO dyes, the Langmuir isotherm model and the PFO kinetic model show the most agreement with the experimental data. According to the Langmuir isotherm, the calculated maximum adsorption capacity for AF and AO were found to be 574.5 mg g−1 and 605.9 mg g−1, respectively, surpassing most adsorption capacities reported until now which is indicative of the high potential of mesoporous MF-KCC-1 as an adsorbent for removal applications.

Preparation of porous silicate supported micro-nano zero-valent iron from copper slag and used as persulfate activator for removing organic contaminants

Porous silicate supported micro-nano zero-valent iron (PSi@ZVI) was prepared from copper slag (CS) through carbothermal reduction technology, and used as a persulfate (PS) activator for removing organic contaminants. Results showed that the properties of the activator were greatly affected by the preparation conditions. Calcination for 20 min at 1100 °C with 20% anthracite was considered the optimum preparation condition for degradation of orange G (OG). The removal rate of OG was improved by increasing the dosages of PSi@ZVI or PS and raising the reaction temperature. Moreover, PSi@ZVI exhibited excellent PS activator ability in a wide range of initial pH, good degradation capability for eosin Y, methyl orange, acid fuchsine, and methylene blue. The reusability and safety of PSi@ZVI were verified. Electron paramagnetic resonance and radical quenching tests indicated that sulfate radical (SO4−) was the main active species in the PSi@ZVI/PS system. The X-ray diffraction results indicated that a high calcination temperature (1100 °C) was beneficial to the reduction of iron-bearing minerals to ZVI. Scanning electron microscopy and energy-dispersive spectroscopy results revealed that the formation of porous structure of PSi@ZVI and the generation of nano to micro-sized ZVI particles on the surface of the silicate holes. The X-ray photoelectron spectra showed that ZVI was first convert into Fe(II), which mainly activated PS and generated Fe(III) in the PSi@ZVI/PS system. Furthermore, the intermediates of OG were detected using gas chromatography–mass spectrometry, and the possible degradation pathway of OG was proposed. This study provides a novel approach for reuse of CS as a heterogeneous activator to effectively activate PS.

Preparation of Photo/Electro-Sensitive Hydrogel and Its Adsorption/Desorption Behavior to Acid Fuchsine

Macroscopic utilization of nanomaterial provides a new idea for the research and development of novel adsorbent, which can enhance efficiency in the adsorption and elution process. In this paper, nano-polypyrrole (PPy) was dispersed into two inexpensive and renewable biomass materials, gelatin (Gel) and chitosan (CS), to fabricate a novel photo/electric-sensitive hydrogel, Gel/CS/PPy. The micro-network of Gel/CS/PPy shows a high adsorption rate of 94.2% for acid fuchsine (AF). Furthermore, with the addition of polypyrrole, Gel/CS/PPy has the characteristic of photo/electric response, which can improve the elution efficiency of AF from the adsorbent. The results showed that the elution efficiency could be increased by 4 times with photo-assistance, and about 2 times with electro-assistance. Predictably, using the methods described in this article, high-quality adsorbents can be designed for more organic pollutants.

Continuous flow removal of acid fuchsine by dielectric barrier discharge plasma water bed enhanced by activated carbon adsorption

Continuous processes which allow for large amount of wastewater to be treated to meet drainage standards while reducing treatment time and energy consumption are urgently needed. In this study, a dielectric barrier discharge plasma water bed system was designed and then coupled with granular activated carbon (GAC) adsorption to rapidly remove acid fuchsine (AF) with high efficiency. Effects of feeding gases, treatment time and initial concentration of AF on removal efficiency were investigated. Results showed that compared to the N2 and air plasmas treatments, O2 plasma processing was most effective for AF degradation due to the strong oxidation ability of generated activated species, especially the OH radicals. The addition of GAC significantly enhanced the removal efficiency of AF in aqueous solution and shorten the required time by 50%. The effect was attributed to the ability of porous carbon to trap and concentrate the dye, increasing the time dye molecules were exposed to the plasma discharge zone, and to enhance the production of OH radicals on/in GAC to boost the degradation of dyes by plasma as well as in situ regenerate the exhausted GAC. The study offers a new opportunity for continuous effective remediation of wastewater contaminated with organic dyes using plasma technologies.

Factors Affecting the Adsorption of Some Ionic Dyes on the Surface of Modify CaO from Eggshell

In this paper, calcium oxide (CaO) was produced by the thermal treatment of eggshell. The doping process with silver iodide (AgI), oxygen (O), sulfur(S) and nitrogen (N) was achieved by adsorbents. The adsorption of Acid fuchsine (AF), Indigo Carmine (IC), Nigrosine (NG) and Alizarine Red S (AR) on the surface of these particles was studied. The different conditions affecting the adsorption process, such as the time of equilibrium, the primary concentration of the studied dyes, the amount of the adsorbent, the acidic function, the speed of the pruning motion and the temperature were studied. The pH stability time (5-10 minutes), IC and NG (30 minutes) and AR were (90 minutes). The effect of temperature was also studied within the range (25-45 ° C). The results showed that the adsorption capacity increased by increasing the temperature, ie the reaction is endothermic. The study showed the effect of the acidic function on the percentage of pigmentation. The percentage was increased by increasing the acidic function in the basal circles on the surfaces except for the AR dye. It decreased the percentage by increasing the acidic function. The effect of the weight of the adsorbent was studied on the percentage of adsorption.

Synthesis of Functionalized Magnetite Titanium Dioxide Nanocomposite for Removal of Acid Fuchsine Dye

In this research, a novel magnetite titanium dioxide nanocomposite functionalized by amine groups (Fe3O4@SiO2@TiO2-NH2) was synthesized and its ability for efficient removal of Acid Fuchsine as an anionic dye from aqueous solutions was investigated. The core-shell structure of Fe3O4@SiO2@TiO2 was prepared using Fe3O4 as magnetic core, tetra ethyl orthosilicate as silica and tetra butyl titanate as titanium source for shell. The synthesized nanocomposites (particle size lower than 44 nm) were characterized by FT-IR, XRD, DRS, SEM and TGA instruments. The various experimental parameters affecting dye removal efficiency were investigated and optimized using Taguchi fractional factorial design. The synthesized adsorbent showed the highest removal efficiency of Acid Fuchsine (99 %) at pH= 3.5, without salt addition and during stirring at contact times less than 10 minutes. The study of kinetic models at two concentration levels showed the fast dye sorption on the surface of proposed nanocomposites with pseudo second order kinetic model (R2=1). Also, the fitting of Acid Fuchsine sorption data to Freundlich, Langmuir and Temkin isotherms suggested that Freundlich model gave a better fitting than other models (R2=0.9936, n=2). Good chemical stability, excellent magnetic properties, very fast adsorption kinetics and high removal efficiency make the synthesized nanocomposite as a proper recoverable sorbent for removal of Acid Fuchsine dye from wastewaters.

Equilibrium, Kinetics and Thermodynamics Studies on the Bisorption of Textile Dyes onto Polyamidoamine Dendrimer Functionalized Soy Hull

In this work, the soy hull has been modified with polyamdioamine dendrimer to prepare a kind of new adsorbents possessing abundant nitrogen functional groups. The adsorption behaviors of the modified soy hull for methyl blue (MB), acid fuchsine (AF), and malachite green (MG) were studied. The removal efficiency of the three organic dyes was in the order of AF>MB>MG, and its values increased with increasing contact time. The adsorption kinetics was studied by pseudo-first-order and pseudo-second-order kinetics models, and the adsorption isotherms were studied by Langmuir and Freundlich isotherm. The pseudo-second-order model and Freundlich isotherm were found to fit well the adsorption processes of the modified soy hull. Thermodynamic data of the adsorption processes were also calculated according to the adsorption thermo-chemistry between the modified soy hull and organic dyes molecules. The values of △G (for MB, AF and MG) are negative, which shows that the adsorption process is spontaneous. The positive value of △H indicates that the adsorption is endothermic and higher temperature makes the adsorption easier. The positive value of △S indicated that the randomness is increased at the solid-solution interface during adsorption process.

Functional chitosan-stabilized nanoscale zero-valent iron used to remove acid fuchsine with the assistance of ultrasound

Chitosan-stabilized nanoscale zero-valent iron (CS–nZVI) was prepared and used for the removal of acid fuchsine (AF) from aqueous solution with the assistance of ultrasound. More than 98.9% of AF was removed using CS–nZVI, aged CS–nZVI (exposed to air for 2 months), while only 14.6% removal efficiency was achieved after 15min by chitosan alone with the assistance of ultrasound. Scanning electron microscopy (SEM) confirmed that chitosan polymers were arranged in a homocentric layered structure. Thus, the polymer can prevent the aggregation of nZVI and increase their anti-oxidation capacity. X-ray diffraction (XRD) also suggested that the chitosan used in synthesis may protect nZVI nanoparticles from air oxidation. Different factors impacting on the removal of AF using CS–nZVI showed that the reduction increased when dosage and temperature increased, but decreased when pH and initial concentration rose. Kinetic studies revealed that the removal of AF fitted well to the pseudo-first-order model. The apparent activation energy was 55.34kJ/mol, indicating a chemically controlled reaction. Finally, the application of CS–nZVI in dyeing wastewater led to a removal efficiency of 99% of AF, while the reuse test confirmed that AF's removal efficiency declined from 99.6 to 39.3% after seven cycles.

Electrospun Self-assembled ZnO Nanofibers Structures For Photocatalytic Activity In Natural Solar Radiations To Degrade Acid Fuchsin Dye

Zinc oxide (ZnO) nanoparticles, self-assembled in the form of one dimensional ZnO nanofibers were synthesized using electrospinning technique from solution of polyvinyl alcohol (PVA) and zinc acetate followed by calcination at 600°C in oxidizing environment. Scanning Electron Microscope (SEM) analysis demonstrates that morphology of ZnO nanofibers having rough surface and corresponding Energy Dispersive Spectrometry (EDAX) confirmed the Zn: O atomic ratio approximately in 50:50. Transmission electron microscopy (TEM) images clearly demonstrate the rough morphology is due to the self-assembling of ZnO nanoparticles having diameter approximately 50nm. X-ray Diffraction (XRD) reveals the polycrystalline structure and Raman spectra show some shifts in phonon modes. The PL graph show exceptional emission at 342nm due to band-band transition. Under solar radiations as produced ZnO nanofibers degrades the 99% of 25ppm acid fuchsine which proven through UV spectra when compared to blank dye solution. This shows that natural solar radiations are sufficient to excite theses self-assembled high surface area ZnO nanofibers to show its photocatalytic activity.

Preparation and formation mechanism of porous polyurea by reaction of toluene diisocyanate with water and its application as adsorbent for anionic dye removal

A novel and easy one-step protocol for preparation of a new porous material, polyurea (PPU), is reported, which is accomplished through a precipitation polymerization of toluene diisocyanate (TDI) in mixed solvent of H2O-acetone without need for surfactant and porogen. Effects of TDI concentration, mechanical stirring, solvent composition and TDI addition rate on PPU structure are studied. Surface morphology and pore structure of PPU are characterized by scanning electron microscopy and Hg intrusion. Chemical structure of the PPU polymer is investigated using NMR, XRD and FTIR. Mechanism of pore formation is discussed. The obtained PPU is used as adsorbent for anionic dyes adsorption investigation. Two anionic dyes, remazol brilliant blue R and acid fuchsine, are tested. The results indicate that the as-prepared PPU is of high performance in dye adsorption and recycled use. This study provided therefore a facile route to the preparation of a novel and attractive adsorbent candidate for removal of anionic dyes from wastewaters.

Synthesis, characterisation of polyaniline–Fe3O4 magnetic nanocomposite and its application for removal of an acid violet 19 dye

The present work deals with the development of a new method for the removal of dyes from an aqueous solution using polyaniline (PANI)–Fe3O4 magnetic nanocomposite. It is synthesised in situ through self-polymerisation of monomer aniline. Photocatalytic degradation studies were carried out for cationic acid violet 19 (acid fuchsine) dye using PANI–Fe3O4 nanocomposite in aqueous solution. Different parameters like catalyst dose, contact time and pH have been studied to optimise reaction condition. The optimum conditions for the removal of the dye are initial concentration 20 mg/l, adsorbent dose 6 gm/l, pH 7. The EDS technique gives elemental composition of synthesised PANI–Fe3O4. The SEM and XRD studies were carried for morphological feature characteristics of PANI–Fe3O4 nanocomposite. The VSM (vibrating sample magnetometer) gives magnetic property of PANI–Fe3O4 nanocomposite; also FT-IR analysis gives characteristics frequency of synthesised PANI–Fe3O4. Besides the above studies kinetic study has also been carried out.

Fabrication of porous hollow γ-Al2O3 nanofibers by facile electrospinning and its application for water remediation

In this paper, we fabricated porous hollow γ-Al2O3 nanofibers by the facile single-capillary electrospinning of an aluminum nitrate (Al(NO3)3)/polyacrylonitrile (PAN) precursor solution, followed by sintering treatment. The nanofibers were characterized by scanning electron microscopy, thermogravimetric analysis, X-ray diffraction. N2 adsorption–desorption isotherm analysis showed that the specific surface area and average pore size of the nanofibers were 67.17 m2 g−1 and 17.3 nm, respectively. A possible mechanism based on the Kirkendall effect was proposed to explain the formation process of the hollow structure. The pore size and diameter of the nanofibers can be tailored by changing the weight ratio of Al(NO3)3·9H2O to the PAN. Moreover, the prepared porous hollow γ-Al2O3 nanofibers were used as adsorbents to eliminate three model dyes (i.e., Congo red, methyl blue, and acid fuchsine) from aqueous solutions. The material exhibited excellent dye adsorption efficiency at a removal ratio greater than 90% in 50 mg L−1 dye solutions after 60 min of adsorption. Kinetic studies were performed and pseudo-first order, pseudo-second order were carried out. The nanofibers also exhibited desired adsorption cycle performance and the ability to regenerate easily. By virtue of the facile electrospinning method, it provides possibilities to fabricate other porous hollow nanofibers with potential applications in the environmental remediation, catalysis, and biomedical fields.

Correlation between Initial BIC and the Insertion Torque/Depth Integral Recorded with an Instantaneous Torque-Measuring Implant Motor: An in vivo Study.

Quantitative intraoperative evaluation of bone quality at implant placement site and postinsertion implant primary stability assessment are two key parameters to perform implant-supported rehabilitation properly. A novel micromotor has been recently introduced allowing to measure bone density at implant placement site and to record implant insertion-related parameters, such as the instantaneous, average and peak insertion torque values, and the insertion torque/depth integral. The aim of this study was to investigate in vivo if any correlation existed between initial bone-to-implant contact (BIC) and bone density and integral values recorded with the instrument. Twenty-five patients seeking for implant-supported rehabilitation of edentulous areas were consecutively treated. Before implant placement, bone density at the insertion site was measured. For each patient, an undersized 3.3 × 8-mm implant was placed, recording the insertion torque/depth integral values. After 15 minutes, the undersized implant was retrieved with a 0.5 mm-thick layer of bone surrounding it. Standard implants were consequently placed. Retrieved implants were analyzed for initial BIC quantification after fixation, dehydration, acrylic resin embedment, sections cutting and grinding, and toluidine-blue and acid fuchsine staining. Correlation between initial BIC values, bone density at the insertion site, and the torque/depth integral values was investigated by linear regression analysis. A significant linear correlation was found to exist between initial BIC and (a) bone density at the insertion site (R = 0.96, explained variance R(2) = 0.92) and (b) torque/depth integral at placement (R = 0.81, explained variance R(2) = 0.66). The system provided quantitative, reliable data correlating significantly with immediate postinsertion initial BIC, and could therefore represent a valuable tool both for clinical research and for the oral implantologist in his/her daily clinical practice.