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Introduction to Different Industrial Effluents and Existing Treatment Technologies
Published in Mihir Kumar Purkait, Piyal Mondal, Chang-Tang Chang, Treatment of Industrial Effluents, 2019
Mihir Kumar Purkait, Piyal Mondal, Chang-Tang Chang
Furthermore, biological treatment of the effluents has been extensively studied using different fungal strains. The white rot fungi Pleurotus eryngii (Hadibarata et al., 2013), Coriolopsis sp. (Chen and Yien Ting, 2015a), and Penicillium simplicissimum (Chen and Yien Ting, 2015b) showed good degradation of naphthalene and triphenylmethane dyes [crystal violet, (CV), methyl violet (MV), cotton blue (CB), and MG)], respectively. However, it is noteworthy to mention that the application of treated textile wastewater is not restricted only to the reduction of toxicity, but it finds advantages in other fields as well. In this context, an interesting application for the reutilization of textile waste sludge for producing concrete blocks with a lime-based treatment step was reported by some researchers. The results of that study showed that lime-based treatment process could diminish the ammonia concentration in the sludge and ultimately enhance the compressive strength and volume stability of the concrete blocks. Hence, delving into studies to explore the practical application of treated textile wastewater could aid in reducing environmental concerns with an added edge.
Medicine and Biology
Published in Wen-Jei Yang, Handbook of Flow Visualization, 2018
Dyes were conventionally employed for visualizing blood vessels in tissue sections. For example, the staining technique has facilitated recognition of small blood vessels in various sections. Stains, i.e., dyes regularly used for blood, are of the so-called Leishman type. They are essentially mixtures of red, blue, and purple values made by mixing in the solution eosin (a yellowish-red acid dye) with methylene blue, methyl violet, methylene azure, and other basic analine dyestuffs to make a polychrome stain. Numerous other compounds, such as eosinates, are also available. When blood is stained by one of these variants of the original Leishman mixture, red cells turn pink, and white cells, containing nuclei and granules, become distinctly colorful. Nuclei exhibit various shades from royal purple to bright magenta, granules show red, rose, blue, or purple in pale-blue cell bodies, and platelets are pink and purple. Through the microscope, these colors appear bright and dark by transmitted light. The Groat-Jenner stain, a modification of the Leishman stain, can be used for photographing blood.
Hydrophobic Organic-Inorganic Nanohybrids
Published in Chang-Sik Ha, Saravanan Nagappan, Hydrophobic and Superhydrophobic Organic-Inorganic Nanohybrids, 2018
Chang-Sik Ha, Saravanan Nagappan
The fabricated TiO2 thin films exhibited excellent optical and photo-electrochemical properties. Similarly, TiO2 thin films were also fabricated on glass and fluorine-doped tin oxide (FTO)-coated glass substrates by the SILAR method [57,58], whereas the TiO2 thin films deposited on the FTO-coated glass substrate showed hydrophobic (147°) and superhydrophobic (158°) surface properties based on the aggregation behavior of the TiO2 thin films on the substrate (Fig. 2.11) [58]. Moreover, the fabricated TiO2 film electrodes can adsorb rose bengal and methyl violet dyes easily onto the materials, resulting in excellent applicability in the electrode of dye-sensitized solar cells (DSSCs).
Application of fly ash modified by alkaline fusion as an effective adsorbent to remove methyl violet 10B in water
Published in Chemical Engineering Communications, 2020
Patrícia Grassi, Fernanda C. Drumm, Dison S. P. Franco, Jordana Georgin, Guilherme L. Dotto, Edson Luiz Foletto, Sérgio L. Jahn
In parallel, the textile industries employ large quantities of dyes on the dyeing process, and a fraction of these compounds end up being released in their effluents (Zangeneh et al. 2015). Each year, approximately 280 thousand tons of effluents containing dye are released in the environment (Sen et al. 2016). In general, these effluents present carcinogenic and mutagenic potential that can further affect the living beings present in terrestrial biomes (Patra et al. 2018). Specifically, methyl violet 10B (MV10B) is a cationic dye that belongs to the class of triarylmethane, applied to color nylon, wool, silk, leather, and cotton in the textile industries (Ma et al. 2012). When ingested or inhaled, it can lead to health complications such as respiratory or renal failure and permanent blindness (Li et al. 2020). Besides, it has high chemical stability, being considered a recalcitrant molecule (Franco et al. 2020).
UV-TiO2 photocatalysis-assisted chemical mechanical polishing 4H-SiC wafer
Published in Materials and Manufacturing Processes, 2018
Zewei Yuan, Yan He, Xingwei Sun, Quan Wen
Methyl violet is a family of organic compounds that could be used as dyes. The color of methyl violet solution will fade when it is oxidized by strong oxidant. So the decoloration of methyl violet could characterize the oxidation of CMP slurry. Fig. 7 shows the decoloration process of the slurry containing methyl violet. As seen in Fig. 7a, the slurry presents purple color before the UV irradiation. After being shined for 30 min, the purple color fades obviously as shown in Fig. 7b. When the slurry is shined for 60 min, the purple color fades absolutely. The slurry color recovers the original color. It indicates that the slurry has strong oxidant under the condition of UV irradiation.
The comparison of natural and magnetically modified zeolites as an adsorbent in methyl violet removal from aqueous solutions
Published in Chemical Engineering Communications, 2022
Esra Altintig, Açelya Alsancak, Huseyin Karaca, Dilek Angın, Hüseyin Altundag
The clinoptilolite zeolite used in the study was supplied from Manisa/Gördes. The chemicals, NaOH, HCI, MG, FeSO4 · 7H2O, and FeCl3 · 6H2O were purchased from Merck, Germany. All chemicals used in the study are analytical grade. The cationic dyestuff methyl violet (MV) with the formula C24H28N3C1 and a molecular weight of 393 g mol−1, was purchased from a commercial supplier. The mixing of the chemical substances was done using an IKA KS 501 orbital shaker. A METTLER TOLEDO pH meter was used for the pH measurement of the solutions, and a BLULAB drying chamber was used for the drying processes.