A critical review of hazardous waste generation from textile industries and associated ecological impacts

Khan, Waseem Ullah; Ahmed, Sirajuddin; Dhoble, Yogesh Nathuji; Madhav, Sughosh

doi:10.1016/j.jics.2022.100829

Cited by 31 publications

(8 citation statements)

References 69 publications

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“…[75] who then tested them for antifungal activity. Compound (105) was created by reacting 6-amino-7-hydroxy-4methylcoumarin (103) with methanol, carbon disulfide, and potassium hydroxide to produce compound (104). The compound (104) was then etherified with bromoethane under alkaline conditions to get the desired thioether (105), as illustrated in Scheme 18.…”

Section: Oxazolo[g]coumarinsmentioning

confidence: 99%

“…Hence, accurately identifying and measuring the acidic and alkaline nature of the surrounding environment is highly important. [104] Current methods for assessing acidity and alkalinity, often utilizing fluorescence sensing, primarily focus on liquid-phase analysis. However, for practical use, solid-state sensors are preferred due to their ease of operation.…”

Section: Acid-base Sensorsmentioning

confidence: 99%

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Annulated Heterocyclic[g]Coumarin Composites: Synthetic Approaches and Bioactive Profiling

Mazin Zeki,

Fakri Mustafa

2024

Chemistry & Biodiversity

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Coumarins, widely abundant natural heterocyclic compounds, are extensively employed in creating various biologically and pharmacologically potent substances. The hybridization of heterocycles presents a key opportunity to craft innovative multicyclic compounds with enhanced biological activity. Fusing different heterocyclic rings with the coumarin structure presents an intriguing method for crafting fresh hybrid compounds possessing remarkable biological effects. In the pursuit of creating heterocyclic‐fused coumarins, a wide range of annulated heterocyclic[g]coumarin composites has been introduced, displaying impressive biological potency. The influence of the linear attachment of heterocyclic rings to the coumarin structure on the biological performance of the resulting compounds has been investigated. This review centers on the synthetic methodologies, structural activity relationship investigation, and biological potentials of annulated heterocyclic[g]coumarin composites. We conducted searches across several databases, including Web of Science, Google Scholar, PubMed, and Scopus. After sieving, we ultimately identified and included 71 pertinent studies published between 2000 and the middle of 2023. This will provide valuable perspectives for medicinal chemists in the prospective design and synthesis of lead compounds with significant therapeutic effects, centered around heterocycle‐fused coumarin frameworks.

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Section: Oxazolo[g]coumarinsmentioning

confidence: 99%

Section: Acid-base Sensorsmentioning

confidence: 99%

Annulated Heterocyclic[g]Coumarin Composites: Synthetic Approaches and Bioactive Profiling

Mazin Zeki,

Fakri Mustafa

2024

Chemistry & Biodiversity

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“…These untreated toxic substances create chemical and biological changes, endangering aquatic species. The dye molecules deplete the dissolved oxygen concentration, preventing sunlight from reaching water sources [10,11]. In addition, synthetic dyes are neither biodegradable nor resistant to environmental conditions [12,13].…”

Section: Introductionmentioning

confidence: 99%

One-pot fabrication of zero-valent iron-embedded activated carbon from rosemary distillation residues for malachite green removal

Nguyen,

Tran,

Nguyen

et al. 2023

Mater. Res. Express

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The current research proposes an innovative strategy for the facile preparation of magnetic activated carbon (MAC) from rosemary distillation residues (RDR). As a magnetic precursor, FeCl3 was impregnated into RDR before KOH was added as an activating agent. One-pot pyrolysis was then conducted to produce zero-valent iron nanoparticles (14.4 wt%) embedded in the activated carbon matrix. Moreover, KOH activation yielded MAC with a large total pore volume of 0.27 cm3/g, a high specific surface area of 458 m2/g, and hierarchical porosity. With a large porous system and different polar functional groups, MAC was subsequently investigated for malachite green (MG) removal in aqueous media. At pH 6.0, MAC eliminated 93.2% MG (50 mg/L) within 120 min. The adsorption process was consistent with the pseudo-second-order kinetic model and the Langmuir isotherm, with a maximum adsorption capacity of 82.6 mg/g. Additionally, MAC demonstrated effective reusability after five consecutive cycles, when MG removal slightly decreased from 96.4±0.6 to 91.8±2.3%. Notably, MAC with a strong saturation magnetization of 18.4 emu/g could be conveniently recovered from treated media through magnetic fields. Overall, rosemary distillation residue-derived magnetic activated carbon can be a potential adsorbent for malachite green remediation thanks to its cost-effectiveness, eco-friendliness, and magnetic separability.

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“…Dyes are resistant to degradation and linger in the environment, because of which dye pollution from diverse sectors constitutes a substantial environmental problem . Untreated wastewater is harmful to aquatic life, inhibits light penetration, and causes aesthetic and ecological issues . Dye pollution, along with other toxins, pollutes water bodies, producing oxygen depletion and aquatic organism toxicity .…”

Section: Introductionmentioning

confidence: 99%

“…1 Untreated wastewater is harmful to aquatic life, inhibits light penetration, and causes aesthetic and ecological issues. 2 Dye pollution, along with other toxins, pollutes water bodies, 3 producing oxygen depletion and aquatic organism toxicity. 4 The efficiency and implementation of regulations to limit industrial effluent vary, resulting in increased water pollution and contamination of drinking water sources.…”

Section: Introductionmentioning

confidence: 99%

Harnessing the Waste-to-Wealth Potential of Saraca asoca Plant-Derived Nanoparticles for the Sustainable Removal of Cationic Dyes through Regenerative Adsorption

Kumar Gupta,

Borah,

Gupta

et al. 2023

Ind. Eng. Chem. Res.

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This study showcases the successful synthesis of Saraca asoca nanoparticles (SANPs) and their efficacy as adsorbents for a range of cationic dyes, namely, malachite green (MG), methylene blue (MB), and crystal violet (CV). SANPs have been characterized through techniques such as powder X-ray diffraction, Fourier transform infrared, dynamic light scattering, scanning electron microscopy, and transmission electron microscopy. X-ray photoelectron spectroscopy analysis confirms the different oxidation states of elements, including carbon, potassium, calcium, phosphorus, silicon, and oxygen. Using the Debye–Scherrer equation, the average crystallite size has been estimated to be 27 nm. Synthesized SANPs illustrate highly effective adsorption toward MB, CV, and MG, demonstrating maximum adsorption efficiencies 495, 404, and 943 mg/g, respectively. Furthermore, the adsorption mechanism follows the pseudo-second-order reaction, and the Langmuir isotherm indicating adsorption follows chemisorption and monolayer formation. Besides this, the high efficiency may be due to the combined effect of diffusion and adsorption. To confirm practical viability and feasibility, SANPs encapsulated within alginate beads were developed that also exhibited a high MG removal efficiency with significant regenerative ability for multiple consecutive cycles. SANPs and their alginate-encapsulated beads, therefore, align with current sustainable development goals.

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A critical review of hazardous waste generation from textile industries and associated ecological impacts

Cited by 31 publications

References 69 publications

Annulated Heterocyclic[g]Coumarin Composites: Synthetic Approaches and Bioactive Profiling

Annulated Heterocyclic[g]Coumarin Composites: Synthetic Approaches and Bioactive Profiling

One-pot fabrication of zero-valent iron-embedded activated carbon from rosemary distillation residues for malachite green removal

Harnessing the Waste-to-Wealth Potential of Saraca asoca Plant-Derived Nanoparticles for the Sustainable Removal of Cationic Dyes through Regenerative Adsorption

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