Recent advancements in sustainable synthesis of zinc oxide nanoparticles using various plant extracts for environmental remediation

Jadoun, Sapana; Yáñez, Jorge; Aepuru, Radhamanohar; Sathish, Manda; Jangid, Nirmala Kumari; Chinnam, Sampath

doi:10.1007/s11356-024-32357-3

Cited by 4 publications

(1 citation statement)

References 188 publications

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“…• OH reacts with the organic moieties of MB, breaking down its molecular structure and forming more minor, less harmful byproducts such as carbon dioxide (CO 2 ) and water (H 2 O). The byproducts of MB degradation are typically nontoxic and environmentally benign, posing minimal risk to aquatic ecosystems h V B + + H 2 O → O H • + H + h V B + + O H − → O H • e C B − + O 2 → O 2 − • O 2 − • + H + → H O 2 • H O 2 • + H O 2 • → H 2 O 2 +…”

Section: Mechanism Of the Degradation Of Mbmentioning

confidence: 99%

Assessment of the Raceway Pond Reactor for Degradation of Methylene Blue Dye in Different Types of Water: A Systematic Kinetics Study under Natural Solar Light

Jadoun

2024

ACS EST Water

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The Atacama Desert (AD), known for its extreme aridity and abundant solar irradiance, presents an opportunity for innovative solar-based environmental research. Raceway pond reactors (RPRs), characterized by their shallow, circular design, offer a scalable solution for pollutant degradation in aqueous environments, known for their versatility and eco-friendliness. This study explores the effectiveness of RPRs under the intense solar radiation of the AD in degrading Methylene blue (MB) dye across different water types: deionized water (DW), tap water (TW), and seawater (SW) with natural pH levels of 5.7, 7.1, and 8.5, respectively. Zinc oxide (ZnO) synthesized via the sol−gel method was used as the photocatalyst with average crystallite size 42.38 and 80.14 nm determined by the Scherrer and the Williamson−Hall equations, respectively. Results demonstrate the successful removal of 100%, 98.54%, and 84.64% of 20 mg/L of MB dye using 0.4 g/L ZnO photocatalysts in 10 L of DW, TW, and SW, respectively. Kinetic analysis favors a pseudo-first-order model, and the degradation order follows DW > TW > SW based on pseudo-first-order constants (0.03902, 0.03217, and 0.00969 min −1 ), highlighting the potential of solar energy and RPRs for environmental remediation in sun-rich regions.

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