Nanostructures and Functional MaterialsNo Access

Eco-friendly removal of phosphate from aqueous solution using natural dietary fibers and minerals

Ho Hong Quyen

Department of Chemical Science and Technology, Tokushima University, Tokushima 770-8506, Japan

E-mail Address: quyenhobkdn@gmail.com

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Maki Yoshioka

Department of Chemical Science and Technology, Tokushima University, Tokushima 770-8506, Japan

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Masashi Kurashina

Department of Chemical Science and Technology, Tokushima University, Tokushima 770-8506, Japan

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Mikito Yasuzawa

Department of Chemical Science and Technology, Tokushima University, Tokushima 770-8506, Japan

E-mail Address: yasuzawa@tokushima-u.ac.jp

Corresponding author.

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, and

Le Thi Xuan Thuy

Faculty of Environment, University of Science and Technology, The University of Da Nang, 54 Nguyen Luong Bang, Da Nang, Vietnam

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https://doi.org/10.1142/S0217979218400751Cited by:3 (Source: Crossref)

This article is part of the issue:

Special Issue — 8th International Conference on Advanced Materials Development and Performance (AMDP2017) 11-15 July 2017; Guest Editors: Mahendra More, Yun Hae Kim and Pankaj Koinkar

Abstract

In this study, we focused on the investigation of phosphate removal using calcium oxide (CaO) and calcium hydroxide (Ca(OH)₂) which are mainly from the calcined shells as adsorbents. Hydroxylapatite Ca $_{10}$ $_{10}$ (PO₄)₆(OH)₂, the component of industrial fertilizer was formed after the adsorption process following the XRD results. The phosphate removal increased from 20% to 97% with the aid of the mixture of flocculants alginic acid (AA), NaHCO₃ and CaCl $_{2} \cdot$ $_{2} \cdot$ 2H₂O in the case of 50 ppm phosphate concentration when the samples were filtered through 2.7 $μ$ $μ$ m particle retention filter paper which is roughly equivalent to the case of phosphate removal rate of 0.2 $μ$ $μ$ m membrane filter paper without flocculants (99%). The results suggest that AA, NaHCO₃ and CaCl $_{2} \cdot$ $_{2} \cdot$ 2H₂O as the flocculants are effective for phosphate removal from 20 to 100 ppm.

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