Brilliant Blue Research Articles

Bioelectricity generation and anodic decolorization of reactive dyes in H-type microbial fuel cell using Pseudomonas gessardii

Anodic decolorization of reactive dyes like Coomassie Brilliant Blue (CB), a triphenylmethane dye, Reactive Red 120 (RR 120) and Reactive Black 5 (RB 5), azo dyes, was investigated in a 300-ml H-type dual chamber Microbial Fuel Cell (MFC) using monoculture of a novel strain Pseudomonas gessardii DD1. The MFC setups were evaluated for power generation, electrochemical activity, dye decolorizing efficiency, and COD removal efficiency. The study revealed a maximum power density 474.06 mW/m2 for RB 5 at 100 ppm concentration with 98.5% dye decolorization, while the maximum COD removal efficiency of 70% ± 2.9 was obtained. Cyclic voltammetry curves indicated the highest peak current of 1.8 mA for MFC operated using RB5. Maximum power density, in case of RR 120 and CB was 262.5 and 225.5 mW/m2, with 63 and 65% COD removal, respectively. Efficient power generation and dye removal is seldom reported in the literature, as the electrons generated by exoelectrogens are consumed for dye reduction and subsequent breakdown or decolorization. The findings indicate that the MFC technology can be an easy and economical option for bioelectricity generation using dye-contaminated wastewater with simultaneous detoxification of toxic pollutants and hence sustainable treatment of industrial wastewater.

Effective separation of dyes/salts by sulfonated covalent organic framework membranes based on phenolamine network conditioning.

This study developed a modified polyacrylonitrile (PAN) membrane controlled by a phenol-amine network and enhanced with a sulfonated covalent organic framework (SCOF), aimed at improving the efficiency of textile wastewater treatment. Utilizing a phenol-amine network control strategy allows for precise manipulation of interfacial reactions in the synthesis of SCOF, achieving highly uniform modification on the surface of the PAN membrane. This modified membrane demonstrated high rejection of over 98% for various water-soluble dyes, including Alcian blue 8GX, Coomassie Brilliant Blue G250, methyl blue, congo red, and rose bengal, and also exhibited specific selectivity in processing salt-containing wastewater. By adjusting the deposition time of the phenol-amine and the concentration of SCOF monomers, optimal retention performance and permeate flux were achieved, effectively separating dyes and salts. This research provides a new and effective solution for treating textile wastewater, especially in separating and recovering dyes and salts, offering broad application prospects in environmental management and water resource management, and highlighting its significant practical implications.

Zn-Al layered double hydroxide nanoparticles for efficient removal of food dyes from wastewater

The ability of layered double hydroxides clay (LDH) produced from ZnAl-NO3 to remove Sunset Yellow FCF (E110), Azorubine (E122), Tartrazine (E102), and Brilliant Blue FCF (E133) from an aqueous solution was studied. The effects of various variables on adsorption were studied. The obtained results show that the adsorption of various food dyes depends on the initial concentration, dose, pH, contact time, and temperature. The adsorption capacities at an equilibrium time of 40 min for E133, E122, E110, and E102 were 18.21, 21.46, 13.19, and 20.58 mg/g, respectively. The adsorption equilibrium data for aqueous solutions were analyzed using Langmuir and Freundlich isotherms and a thermodynamic study. Adsorption kinetics data for aqueous solutions was studied using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The morphology for Zn-Al LDH was investigated by scanning electron microscopy (SEM) and BET (pore size = 0.004 cc/g). Equilibrium data were studied by Freundlich, Langmuir, and Temkin isotherms. As for thermodynamics, the value of ∆H° is negative, which means that the adsorption method is exothermic at a temperature range of 288–338 K. ∆S ° is a negative value indicating that the randomness is low, ∆G° is also negative means that the reaction is spontaneous. The FTIR spectroscopic analysis of LDH before and after the adsorption also confirms that the adsorption of food dyes was smooth and spontaneous on Zn-Al LDH providing an excellent and easy-to-use adsorption method for industrial application of wastewater treatment.

ADSORPTION OF REMAZOL BRILLIANT BLUE DYE USING PALM OIL SHELL FLY ASH HCl ACTIVATED

Remazol Brilliant blue is an azo dye that is widely used in textile dyeing. The most appropriate handling method to be used in overcoming problems caused by textile dye waste is adsorption. Fly ash is an adsorbent that can be used to overcome this problem. Chemical activation was carried out using 1 M HCl solution. Besides that, physical activation was also carried out at 500°C for 1 hour. Research is needed to determine the optimum conditions for fly ash in dye adsorption to produce high adsorption efficiency. XRF characterization showed that palm shell fly ash was dominated by CaO of 71.064% and SiO2 of 15.734%. Characterization using FTIR shows the presence of Si-O groups in Fly ash. To analyze the surface morphology of the fly ash adsorbent, an SEM test was carried out and it was known that the surface morphology of the fly ash adsorbent after chemical and physical activation showed pore formation. Characterization using Surface Area Analyzer showed a surface area of 13.6153 m2/g. optimum absorption conditions at pH 6 with an adsorption capacity of 15.84 mg/g. optimum contact time of 60 minutes with an adsorption capacity of 15.54 mg/g. The optimum adsorbent mass is 0.5 g with an adsorption capacity of 9.54 mg/g and the optimum adsorbent concentration is at 200 ppm with an adsorption capacity of 69.08 mg/g. In this study the adsorption model used is the Freundlich isotherm. Based on the research result, it is known that fly ash is a suitable adsorbent for dye adsorption which is characterized by high color removal efficiency. Further characterization regarding the initial conditions of fly ash is needed as a comparison for fly ash after activation

Xenobiotic Removal by Trametes hirsuta LE-BIN 072 Activated Carbon-Based Mycelial Pellets: Remazol Brilliant Blue R Case Study

As a toxic xenobiotic compound, the anthraquinone dye Remazol Brilliant Blue R (RBBR) poses a serious threat to aquatic ecosystems. In the present study, the ability of Trametes hirsuta to remove RBBR from the medium was investigated, and the role of adsorption by fungal mycelium and biodegradation by fungal enzymes was evaluated. It was shown that the whole fungal culture was able to remove up to 97% of the dye within the first four hours of incubation. Based on enzymatic activities in the culture broth, laccases were proposed to be the main enzymes contributing to RBBR degradation, and RT-qPCR measurements demonstrated an increase in transcription for the two laccase genes—lacA and lacB. Composite mycelial pellets of T. hirsuta with improved adsorption ability were prepared by adding activated carbon to the growth medium, and the induction of laccase activity by carbon was shown. For composite pellets, the RBBR decolorization degree was about 1.9 times higher at 1 h of incubation compared to carbon-free pellets. Hence, it was shown that using fungal mycelium pellets containing activated carbon can be an effective and economical method of dye removal.

Construction of novel dual Z-scheme heterojunction of ternary CdS/g-C3N4/NiFe2O4 magnetically retrievable nanocomposite for boosted photocatalytic and energy storage applications

A novel CdS/g-C3N4/NiFe2O4 (CGN) ternary nanocomposite photocatalyst was rationally developed via a simple wet-impregnation technique. Looking at the band structure of the components of the catalyst, a novel dual Z-scheme heterojunction can be successfully developed, generating more active sites that rapidly encourage the separation of the photo-generated species, contributes to preventing the aggregation of the synthesized nanocomposite, and enhance the light absorption efficiency. Remazol Brilliant Blue R (RBBR) was photocatalytically degraded by the nanocomposite in the presence of visible light to assess its photocatalytic effectiveness. The CGN 2 ternary nanocomposite had the maximum photocatalytic activity (96 %) if compared to the other prepared photocatalysts, as the rate of degradation of pure CdS, CdS/g-C3N4, CGN 1, and CGN 3 nanocomposites were only around 53.4, 85, 87.5, and 92 %, respectively, keeping the irradiation time. Based on trapping tests, •OH, •O2− and h+ radicals are the main active species that play a vital role in the photocatalytic oxidation process. Even after the fourth cycle, the CGN 2 composite remained efficient in the successive photocatalytic degradation of RBBR , maintaining over 91 % of its first degradation efficiency. The CdS/g-C3N4/NiFe2O4 nanocomposite revealed outstanding cycling stability due to its inherent magnetic property, making it a promising choice as a visible light photocatalyst. The electrochemical energy-storage behavior of CGN 2 as active electrode material exhibited a remarkable specific capacitance of 195 F g−1 (67 C g−1) at 1 A g−1. It delivered an outstanding cycling stability of 91 % capacity retention after 2000 charge–discharge cycles. The obtained remarkable results indicate that the CGN 2 nanocomposite is a promising active electrode material for high-performance energy-storage supercapacitors.

Synthesis of 2-amino-terephthalic acid crosslinked chitosan/bentonite hydrogel; an efficient adsorbent for anionic dyes and laccase

This research article presents the fabrication of NH2-terephthalic acid crosslinked chitosan-bentonite composite, which adopted a facile synthesis approach and offered efficient adsorption capacity for organic dyes. A novel hydrogel material named CB 5:1 demonstrated remarkable adsorption for anionic dyes (Congo red (CR) and brilliant blue (BB)) while showing a negligible affinity for cationic dyes. Adsorption isotherm studies revealed the adsorption capacity of 4950 mg/g and 2053 mg/g (per g of composite's dry weight) for CR and BB following the Langmuir adsorption model. Kinetics and thermodynamic studies were also conducted while the adsorption of anionic dyes in the presence of metal ions, cationic dyes, anionic dyes, and in simulated water remained unaffected. Laccase, an industrially important enzyme, was also immobilized on CB 5:1 to achieve enzyme stability and reusability, resulting in a staggering immobilization capacity (4782 mg/g) at pH 6.0. Laccase immobilized product was employed to perform dye degradation (> 90 % for CR and > 75 % for BB), and the reusability was tested. Overall, our crosslinked product proved appealing for removing high concentrations of anionic organic dyes from polluted water and could be envisaged for practical use.

Sensing of Harmful Dyes in Food Particles Using Nanomaterial-Based Electrochemical Analysis

Azo-dyes, including Allura Red, Sunset Yellow (SY), Brilliant Blue, and Tartrazine (Tz), are commonly utilized as food coloring additives because of their affordability and durability. The dyes SY and Tz are widely employed within this dye group because of their comparable hues and frequent co-application in food items. Despite their beneficial industrial applications, these substances include a toxicity profile that poses risks, including the potential for undesirable consequences such as allergies, asthma, cancer, DNA damage, cytotoxicity, and nervousness. In light of these factors, employing susceptible, cost-effective, straightforward, and expeditious sensors to examine azo-hazardous dyes is imperative. Electrochemical nanosensors (ENS), which integrate the distinctive characteristics of electrochemistry with nanotechnology, are very advantageous devices that find extensive application in analyzing azo dyes. In this paper, the exterior of a Glassy Carbon Electrode (GCE) has been subjected to modification by the incorporation of calixarene (Cx) and gold nanoparticles (AuNP) to facilitate the improvement and integration of electrochemistry with nanotechnology. The sensing capability of the Modified GCE (MGCE) nanosensor with Cx and AuNP has been evaluated by the utilization of Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV) techniques. The study aimed to examine the impact of various factors to determine the optimal circumstances for obtaining the most favorable reaction from the target analytical substances. The signals of the chosen food dyes have been significantly improved when using the MGCE nanocomposite, which is attributed to the synergistic interaction between Cx and AuNP compared to the unmodified GCE. The sensor platform that was built also showed notable performance characteristics when utilized to detect food colors in food samples. Furthermore, the observed high percentage of recovery, consistent repeatability, and durability indicate the potential use of the developed electrochemical platform to examine actual samples.

Electricity generation and oxidoreductase potential during dye discoloration by laccase-producing Ganoderma gibbosum in fungal fuel cell

Color chemicals contaminate pure water constantly discharged from different points and non-point sources. Physical and chemical techniques have certain limitations and complexities for bioenergy production, which motivated the search for a novel sustainable production approaches during dye wastewater treatment. The emerging environmental problem of dye decolorization has attracted scientist's attention to a new, cheap, and economical way to treat dye wastewater and power production via fungal fuel cells. Ganoderma gibbosum was fitted in the cathodic region with laccase secretion in the fuel cell. At the same time, dye water was placed in the anodic region to move electrons and produce power. This study treated wastewater using the oxidoreductase enzymes released extracellularly from Ganoderma gibbosum for dye Remazol Brilliant Blue R (RBBR) degradation via fungal-based fuel cell. The maximum power density of 14.18 mW/m2 and the maximum current density of 35 mA/m2 were shown by the concentration of 5 ppm during maximum laccase activity and decolorization of RBBR. The laccase catalysts have gained considerable attention because of eco-friendly and alternative easy handling approaches to chemical methods. Fungal Fuel Cells (FFCs) are efficiently used in dye treatment and electricity production. This article also highlighted the construction of fungal catalytic cells and the enzymatic performance of fungal species in energy production during dye water treatment.

The Effects of Antimicrobial Photodynamic Therapy Used to Sterilize Carious Dentin on Rat Dental Pulp Tissue.

Antimicrobial photodynamic therapy (aPDT) used to sterilize carious dentin may irritate pulp tissues because of tissue-penetrating laser and singlet oxygen generation. This study aimed to assess the effects of aPDT on rat pulp tissues. A cavity formed in a rat maxillary first molar was treated with aPDT. The combined photosensitizer and laser irradiation conditions in the aPDT groups were as follows: methylene blue and 100 mW for 60 s, brilliant blue (BB) and 100 mW for 60 s, BB and 50 mW for 120 s, and BB and 200 mW for 30 s. Each cavity was treated with an all-in-one adhesive and filled with flowable resin. aPDT was not applied for the control. In each group, the rats were sacrificed on postoperative days 1 and 14, and thin sections of the treated teeth were prepared. Pulp tissue disorganization (PTD), inflammatory cell infiltration (ICI), and tertiary dentin formation (TDF) were evaluated. At 1-day evaluation, there were significant differences between the aPDT group and controls with respect to PTD and ICI (p < 0.01); 14 days later, almost all specimens showed tertiary dentin formation. The application of aPDT caused reversible damage to the rat pulp, while in the long term, healing occurred with the formation of tertiary dentin.

Nontargeted Screening of Contaminants of Emerging Concern in the Glen Valley Wastewater Treatment Plant, Botswana.

There is growing concern about the prevalence and impact of contaminants of emerging concern (CECs). The environmental monitoring of CECs has, however, been limited in low- and middle-income countries due to the lack of advanced analytical instrumentation locally. In the present study we employed a nontargeted and suspect screening workflow via liquid chromatography coupled with high-resolution mass spectrometry (HRMS) to identify known and unknown pollutants in the Glen Valley wastewater treatment plant, Botswana, complemented by analysis of groundwater samples. The present study represents the first HRMS analysis of CECs in water samples obtained in Botswana. Suspect screening of 5942 compounds qualitatively identified 28 compounds, including 26 pharmaceuticals and two illicit drugs (2-ethylmethcathinone and 11-nor-9-carboxy-Δ9-tetrahydrocannabinol). Nontargeted analysis tentatively identified the presence of 34 more compounds including (5ξ)-12,13-dihydroxypodocarpa-8,11,13-trien-7-one, 12-aminododecanoic acid, atenolol acid, brilliant blue, cyclo leucylprolyl, decanophenone, DL-carnitine, N,N'-dicyclohexylurea, N4-acetylsulfamethoxazole, NP-003672, and 24 polyethylene glycol polymers. The highest number of detections were in influent wastewater (26 CECs) followed by effluent wastewater (10 CECs) and, lastly, groundwater (4 CECs). Seventeen CECs detected in the influent water were not detected in the effluent waters, suggesting reduced emissions due to wastewater treatment. Two antiretroviral compounds (abacavir and tenofovir) were detected in the influent and effluent sources. This suggests that wastewater treatment plants are a major pathway of chemical pollution to the environment in Botswana and will help inform prioritization efforts for monitoring and remediation that is protective of these key ecosystems. Environ Toxicol Chem 2024;43:52-61. © 2023 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.

Toxicity of brilliant blue dye on development organ and survival rate of tilapia larvae (Oreochromis niloticus)

One of the most widely used textile dyes is brilliant blue. However, brilliant blue has a bad influence on the waters, namely the effect of carcinogenic, polluted air quality, cannot be degraded or non-biodegradable and affects fish life in the waters. The purpose of this research was to determine the effect of the toxicity of brilliant blue dye on organ development and survival rate of tilapia (Oreochromis niloticus) larvae. The stage of this research was a completely randomized design with the provision of brilliant blue dye to the larvae of tilapia (Oreochromis niloticus). The results showed that the highest concentration treatment (40 ppm) experienced the fastest organ development, the smallest yolk volume (0.14 mm3), the highest abnormality (20%), and the lowest larval survival rate (65%).

A pine leaf form acrylic resin coated coomassie brilliant blue g250-nido-carborane fluorescent complex strategy for tumor cell imaging

Four distinct fluorescence complexes were prepared using a one-pot method: The L100-55-fluorescent complex (LFC), EPO-fluorescent complex (EFC), RS-fluorescent complex (SFC), and RL-fluorescent complex (RFC), respectively. The water solubility, selectivity, and visualization of the carborane have drawn a lot of attention. The carborane's low solubility is resolved, and Coomassie Brilliant Blue (CBB) G250-nido-carborane's biocompatibility is enhanced. The LFC complex was observed to scaly, branch and spread in (Scanning Electron Microscope) SEM and (Transmission Electron Microscope) TEM, like the pine leaves tightly covering the zwitteric complex. It was discovered that the fluorescent complex of LFC has strong selectivity and can accurately infiltrate tumor cells by imaging of tumor cells in vitro, suggesting that LFC has good biocompatibility. Human prostate cancer cells (PC3), human cervical cancer cells (HeLa) and Human normal liver cells (LO2) were evaluated under ten various concentration circumstances in the (Cell Counting Kit-8) CCK8 experiment. The proliferation impact was found to be 57.29% and 59.41%, respectively. shown the complex's strong anti-tumor action and little cytotoxicity. The design not only provides an excellent visual fluorescence targeting effect, but it also addresses the issue of nido-caborane-coomassie brilliant blue G250′s bioavailability.

Adsorption of Remazol Brilliant Blue R Dye Using Activated Carbon from Emty Palm Oil Bunches

Various types of dyes are used in the textile industry, including Remazol Brilliant Blue R dye. Remazol dye is a type of anthraquinone which is very difficult to remove if it is contaminated in the environment. One method of dealing with dyes that pollute the environment is adsorption using activated carbon. The material for activated carbon has the most potential to come from the palm oil industry, namely empty palm fruit bunches because they are widely available and have economic value. This study aimed to determine the effect of varying exposure time between activated carbon made from empty palm fruit bunches and textile dye Remazol Brilliant Blue R on decreasing the concentration of dye Remazol Brilliant Blue R. The adsorption process was carried out with the ratio of adsorbent mass: dye volume w/v (0.1:15) and varying the contact times of 20, 40, 60, 80, 100 and 120 minutes. The initial concentration of textile substances was 23.2121 mg/L and was contacted between Remazol Brilliant Blue R textile substances with adsorbents using a shaker. Analysis of adsorption results using a UV – Vis instrument with a wavelength of 670 nm for Remazol Brilliant Blue R dye. The results showed that the best adsorption conditions was 60 minute contact time, with a removal percentage of 87.23% with an adsorption capacity of 3.0373 mg/g. The adsorption of Remazol Brilliant Blue R follows the Langmuir adsorption equation model with an R2 of 0.9997.

Inorganic nanoparticles fabricated alginate based nanocomposites for the treatment of brilliant blue dye

The present research work addresses the importance and preparation of polyurethane-sodium alginate (PU-NaAL) composite and silver nanoparticles fabricated PU-NaAL (Ag@PU-NaAL) nanocomposites. Polyurethane was fabricated with sodium alginate to enhance its mechanical properties as well as maintained biocompatibility of the polymer. These polymers based composites were used as micro-reactors for the loading of AgNPs. SPR band appeared at 410 nm in UV–visible (UV-visible) spectra confirmed the successful fabrication of NPs. Fourier transform infrared spectroscopy (FTIR) illustrated the involvement of carbonyl group in the stabilization of mNPs. Thermo-gravimetric analysis (TGA) gives the interpretation of thermal behavior of nanocomposite polymer. It explained that AgNPs were remained stabilized even at high temperature (600 °C) at which major part of polymer campsite was degraded. This analysis also showed that 9.378% AgNPs contents were loaded in polymer chains to prepare nanocomposite. Catalytic activity of Ag@PU-NaAL nanocomposite polymers was investigated by reducing brilliant blue (BB) dye while using NaBH4 as reductant. Dye was degraded catalytically in just 17 min while using NaBH4 as reducing agent. It was also concluded that rate of reduction of BB was also changed by changing the amount of BB dye, NaBH4 concentration and catalyst dose in the reaction mixture. Reported catalyst was also found efficient for the treatment of mixture of toxic dyes and dyes polluted textile industry wastewater.

A sensitive Raman spectroscopy sensor for determination cardiac troponin I based on proteolytic peptide magnetic imprinting technology

This paper proposes a selective strategy for quantitative detecting cardiac troponin I (cTnI) in clinical serum samples by using Raman spectroscopy combined with magnetic molecularly imprinted polymers (MMIPs). The signature peptide was selected as a template for molecular imprinting due to its chemical stability and small molecular mass. MMIPs were synthetized with the signature peptide as template and methylacrylic acid as monomer in presence of vinyl-modified magnetic particles. MMIPs with high magnetic character and adsorption properties were able to be stained by Coomassie Brilliant Blue G-250 after the target template was specifically captured, which showing a characteristic absorption peak at Raman shift 1610 cm−1. The Raman signal intensity at 1610 cm−1 showed a linear relationship in the 0.01 to 100 ng·mL−1 concentration range. The recovery of cTnI in serum were 92.7–111.2 % with relative standard deviation in the range of 2.51 % to 8.52 %. This paper has important practical application for preliminary rapid detection of cTnI in clinical serum samples.

Crucial roles of structural, morphological, and optical properties in enhancing the photocatalytic performance of ZnO nanorods

ZnO nanorods with different structural, morphological, and optical properties were fabricated using hydrothermal process by controlling hydrothermal reaction temperature. It has been presented that the structural, morphological and optical properties of the nanorods are strongly influenced by the hydrothermal reaction temperature. XRD results show that ZnO nanorods have a polycrystalline structure with hexagonal wurtzite. Increasing hydrothermal reaction temperature up to 100 °C stimulates the vertically standing growth along the c-axis orientation on the substrate as shown in FESEM images. The growth is followed by the decrease of the transmittance and energy band-gap of the ZnO nanorods. The photocatalytic activity of ZnO nanorod was evaluated using the percentage degradation of Coomassie® Brilliant blue and Indigo carmine dyes as a function of irradiation time. The photodegradation efficiency of ZnO nanorods synthesized with hydrothermal reaction temperatures at 80, 90 and 100 °C for decolorization of Coomassie® Brilliant blue was 71%, 75% and 81%, respectively, while for Indigo carmine was 50%, 53% and 66%, respectively. The variations of efficiency values indicate that the structural, morphological, and optical properties of ZnO nanorods play an important role in photocatalytic activity.

Sustainable development of pulping by-product for limiting its pollution risk and production new aerogel-based carbon nanostructures for dyes adsorption

A clean approach for disposing the pulping by-product (black liquors- BLs) as an effective component in preparing high surface area aerogel-based carbon nanostructure adsorbents was the objective of this current work. These novel adsorbents were assessed as a benefit for removing the cationic and anionic dyes. In this respect, black liquors from pulping of rice straw by different pulping reagents were used as components together with resorcinol in production of aerogel precursors for carbon nanostructures (CNSs). The effective role of BL-based aerogels was evidenced from comparing their CNSs adsorption capacities with CNSs of aerogels free from BLs, towards dyes together with iodine. Different isotherms (Langmuir, Freundlich, Temkin and Dubinin-radushkevich (D-R) were studied to calculate the adsorption capacities. Results showed that CNSs from BL-based aerogels had higher adsorption capacities to dyes (methylene blue (MB) and brilliant blue (BB) than that produced in absence of BLs; where it increased from 256 to 307 mg/g and from 7 to 61 mg/g, respectively. The BLs from pulping of RS with alkaline reagents (NaOH and KOH–NH4OH) provided highest MB adsorbents, while highest adsorption of BB was noticed in case of BL from sulfite reagent, moreover this BL only provided improvement in Iodine value (increased from 752 to 968 mg/g). It is interesting to note that with this investigation we are able to overcome the problems of obtaining carbon nanomaterials from BLs or extracted lignin with low surface area. The surface area of the CNSs that produced through our investigation (1607 m2/g) surpassed the results from previous published work.

An ultrasensitive electrochemical platform based on copper oxide nanoparticles and poly (crystal violet) for the detection of brilliant blue FCF from soft drinks

In this study, a highly sensitive and quick electrochemical platform based on poly (crystal violet) film and copper oxide nanoparticles for the detection of brilliant blue FCF from various soft beverages was developed. The synthesized copper oxide nanoparticles were investigated with Fourier transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray. Further, crystal violet was electropolymerized on the surface of the carbon paste electrode modified with copper oxide nanoparticles. The electrochemical properties of poly (crystal) violet/copper oxide nanoparticles modified carbon paste electrode were assessed through the utilization of cyclic voltammetry and electrochemical impedance spectroscopy. Furthermore, the signal towards the oxidation of brilliant blue was examined using the differential pulse voltammetry method. Under ideal experimental conditions, the peak current exhibited a linear relationship with the brilliant blue concentration within the range of 0.01–1.00 nmol/L, with a sensitivity of 294.55 µA nmol/L cm−2 and a significant detection limit of 3 pmol/L. In the presence of other dyes and other food additives, the developed platform showed greater selectivity in detecting brilliant blue. The reliability of the designed platform was demonstrated by the 99.19 – 100.67 recovery percentage for the identification of BB in various soft drink samples.

PAN/PVP/CD-MOF composite beads for the removal of Crystal Violet and Brilliant Blue G in water

Cyclodextrin metal–organic frameworks (CD-MOFs) have a high surface area and unique coordination chemistry that enable them to be used as a carrier material for various materials. However, it is unstable in water, limiting its application in aqueous solutions. Here, we report the application of CD-MOFs in treating cationic and anionic dyes in water for the first time by forming a composite with polyacrylonitrile (PAN) and polyvinylpyrrolidone (PVP) to form composite beads. The composition of the composite beads was optimized through a Box-Behnken design of experiments. The optimum composition of PAN = 5.91 wt%, PVP = 1.89 wt%, and CD-MOF = 2.68 wt% yielded a CV and BB sorption capacities of 50.8109 ± 0.0634 mg/g and 28.5583 ± 0.1296 mg/g, respectively. The composite beads were characterized using SEM, EDX, and FTIR. We showed that CD-MOFs could be used as an adsorbent for wastewater treatment.