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Green Processing and Synthesis

Editor-in-Chief: Hessel, Volker

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Volume 7, Issue 2

Issues

Study on simultaneous adsorption of phosphate and fluoride from water environment by modified laterite ore from Northern Vietnam

Nguyen Thi Hue
  • Corresponding author
  • Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, CauGiay, Hanoi, Vietnam
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/ Nguyen Hoang Tung
  • Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, CauGiay, Hanoi, Vietnam
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Published Online: 2017-03-28 | DOI: https://doi.org/10.1515/gps-2016-0136

Abstract

Natural laterite can be regarded as a strong adsorbent due to its special structure and composition. In this study, the laterite was modified by manganese oxide (MnO2) to create a new good adsorbent for treating phosphate and fluoride in water environment. Under the optimized conditions of the adsorbent dose (pH 6, temperature 20°C, and the contact time 180 min), laterite, doped manganese, with diameter of grains from 0.1 to 0.5 mm has maximum adsorption capacity of 31.25 mg/g and 10.99 mg/g for phosphate and fluoride, respectively. The characteristics of the manganese doping laterite were confirmed using various techniques like SEM, BET, XRD, EDX. The adsorption process of the material was investigated by both kinetic models (pseudo-first and second orders) and isotherm models (Freundlich and Langmuir). This new material was tested for treatment of wastewater taken from the superphosphate fertilizer factory, with the results obtained showing high potential for application in reality.

This article offers supplementary material which is provided at the end of the article.

Keywords: adsorption; dope; fluoride; laterite ore; manganese dioxide; phosphate

References

About the article

Nguyen Thi Hue

Nguyen Thi Hue received her PhD from Hanoi National University of Natural Science, Vietnam, in 1996. She is currently working as a professor at the Institute of Environmental Technology, Vietnam Academy of Science and Technology. Her field of interest is on the different applications of technologies for treating environmental pollution.

Nguyen Hoang Tung

Nguyen Hoang Tung obtained his MS in Material Science from the School of Material Science, Japan Advanced Institute of Science and Technology, Japan, in 2011. He is currently working as a researcher at the Institute of Environmental Technology, Vietnam Academy of Science and Technology. His field of interest is on the different applications of technologies for treating environmental pollution.


Received: 2016-08-11

Accepted: 2017-02-20

Published Online: 2017-03-28

Published in Print: 2018-04-25


Citation Information: Green Processing and Synthesis, Volume 7, Issue 2, Pages 89–99, ISSN (Online) 2191-9550, ISSN (Print) 2191-9542, DOI: https://doi.org/10.1515/gps-2016-0136.

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