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317221

Removal of Cadmium lons from Industrial Wastewater by Cementation

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Last updated: 03 Jan 2025

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Abstract

Electroplating wastewater constitute a major source for environmental pollution with heavy metal ions such as Cu++, Cd++, Pb++ and Cr6+ These ions are lethal to man and aquatic life as well, therefore should be removed from wastewater before disposal of waste. The present work is concerned with the removal of Cd++ from wastewater by cementation on zinc in a batch stirred tank reactor lined with a cylindrical zinc sheet. The rate of Cd++ removal was studied under different conditions of impeller rotation speed, initial Cd++ concentration, temperature and time of cementation. It was found that the rate of Cd++ removel increases with increasing impeller rotation speed, temperature, initial concentration and residence time. Mechanistic study of the reaction through activation energy [8.6 kcal/mole] determination showed that cementation of Cd++ on zinc is a diffusion controlled reaction. Visual observations showed that cadmium deposits on zinc in the form of powder. Cadmium powder is a valuable salable product which can improve the economy of the process. Suggestions for improving the efficiency of the present technique by using baffled vessels have been concluded.

DOI

10.21608/jhiph.2000.317221

Keywords

Cadmium lons, Industrial Wastewater, cementation

Authors

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S

Last Name

Nosier

MiddleName

A.

Affiliation

Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Egypt

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First Name

W

Last Name

El-Shalt

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Affiliation

Department of Environmental Health, High Institute of Public Health, Alexandria University, Egypt

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Volume

30

Article Issue

1

Related Issue

43341

Issue Date

2000-01-01

Receive Date

2023-09-13

Publish Date

2000-01-01

Page Start

39

Page End

48

Print ISSN

2357-0601

Online ISSN

2357-061X

Link

https://jhiphalexu.journals.ekb.eg/article_317221.html

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https://jhiphalexu.journals.ekb.eg/service?article_code=317221

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Original Article

Type Code

511

Publication Type

Journal

Publication Title

Journal of High Institute of Public Health

Publication Link

https://jhiphalexu.journals.ekb.eg/

MainTitle

Removal of Cadmium lons from Industrial Wastewater by Cementation

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Article

Created At

23 Dec 2024