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Degradation of Reactive Red 180 and Safranin and a Comparative Analysis of Photocatalysis and Photo‐Membrane Systems for Real Textile Wastewater Treatment.

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Title: Degradation of Reactive Red 180 and Safranin and a Comparative Analysis of Photocatalysis and Photo‐Membrane Systems for Real Textile Wastewater Treatment.
Authors: Kaya, Merve1 (AUTHOR), Alterkaoui, Aya1 (AUTHOR), Bilici, Zeynep1 (AUTHOR), Saleh, Mohammed2 (AUTHOR) muh.saleh89@gmail.com, Yatmaz, H. Cengiz3 (AUTHOR), Dizge, Nadir1 (AUTHOR) nadirdizge@gmail.com
Source: Asia-Pacific Journal of Chemical Engineering. Jan/Feb2026, Vol. 21 Issue 1, p1-12. 12p.
Subjects: Photocatalysis, Membrane reactors, Reactive dyes, Chemical oxygen demand, Industrial wastes, Zinc oxide, Basic dyes, Color removal (Sewage purification)
Abstract: This study examined the degradation of Reactive Red 180 and safranin using zinc oxide photocatalysis. Complete dye removal was achieved for both dyes under optimal conditions within 2 h. For Reactive Red 180, the optimum conditions were pH 10, 0.5 g/L zinc oxide, 25 ppm dye concentration, and 1 L volume. For safranin, the conditions were pH 10, 0.75 g/L ZnO, 25 ppm dye concentration, and 1 L volume. In terms of reusability, the removal efficiency of Reactive Red 180 decreased from 100% at the 1st cycle to 82% after five cycles, while safranin removal remained constant across all cycles. A comparison between photocatalysis and photo‐membrane systems was conducted on real textile wastewater with an original pH of 10.45 and a Pt/Co value of 1000 ppm. In the Photocatalytic Membrane Reactor, 100% dye removal and 48% chemical oxygen demand removal were achieved in 2 h using a zinc oxide amount of 0.75 g/L. In the photocatalytic system, 86% dye removal efficiency and 20% chemical oxygen demand removal efficiency were achieved after 4 h. The photocatalytic membrane reactor presents an efficient, durable, and cost‐effective solution for various industrial and environmental processes, making it a promising alternative to traditional photocatalytic systems. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:This study examined the degradation of Reactive Red 180 and safranin using zinc oxide photocatalysis. Complete dye removal was achieved for both dyes under optimal conditions within 2 h. For Reactive Red 180, the optimum conditions were pH 10, 0.5 g/L zinc oxide, 25 ppm dye concentration, and 1 L volume. For safranin, the conditions were pH 10, 0.75 g/L ZnO, 25 ppm dye concentration, and 1 L volume. In terms of reusability, the removal efficiency of Reactive Red 180 decreased from 100% at the 1st cycle to 82% after five cycles, while safranin removal remained constant across all cycles. A comparison between photocatalysis and photo‐membrane systems was conducted on real textile wastewater with an original pH of 10.45 and a Pt/Co value of 1000 ppm. In the Photocatalytic Membrane Reactor, 100% dye removal and 48% chemical oxygen demand removal were achieved in 2 h using a zinc oxide amount of 0.75 g/L. In the photocatalytic system, 86% dye removal efficiency and 20% chemical oxygen demand removal efficiency were achieved after 4 h. The photocatalytic membrane reactor presents an efficient, durable, and cost‐effective solution for various industrial and environmental processes, making it a promising alternative to traditional photocatalytic systems. [ABSTRACT FROM AUTHOR]
ISSN:19322135
DOI:10.1002/apj.70135