Chawla, Sneha and Uppal, Himani and Yadav, Mohit and Bahadur, Nupur and Singh, Nahar (2017) Zinc peroxide nanomaterial as an adsorbent for removal of Congo red dye from waste water. Ecotoxicology and Environmental Safety , 135. pp. 68-74. ISSN 0147-6513

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In the past decade, various natural byproducts, advanced metal oxide composites and photocatalysts have been reported for removal of dyes from water. Although these materials are useful for select applications, they have some limitations such as use at fixed temperature, ultra violet (UV) light and the need for sophisticated experimental set up. These materials can remove dyes up to a certain extent but require long time. To overcome these limitations, a promising adsorbent zinc peroxide (ZnO2) nanomaterial has been developed for the removal of Congo red (CR) dye from contaminated water. ZnO2 is highly efficient even in the absence of sunlight to remove CR from contaminated water upto the permissible limits set by the World Health Organization (WHO) and the United States- Environmental Protection Agency (US-EPA). The adsorbent has a specific property to adjust the pH of the test solution within 6.5-7.5 range irrespective of acidic or basic nature of water. The adsorption capacity of the material for CR dye was 208 mg g(-1) within 10 min at 2-10 pH range. The proposed material could be useful for the industries involved in water purification. The removal of CR has been confirmed by spectroscopic and microscopic techniques. The adsorption data followed a second order kinetics and Freundlich isotherm.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Elsevier.
Subjects: Biochemistry & Molecular Biology > Toxic Substances
Earth Sciences
Depositing User: Users 27 not found.
Date Deposited: 21 May 2020 11:38
Last Modified: 21 May 2020 11:38

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