Introduction

Kubo, Takekazu

doi:10.1007/978-981-15-4202-2_1

Cited by 1 publication

(1 citation statement)

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“…Therefore, we focused on mechanochemical treatment of wastes titanium oxides to easily prepare titanium hydroxide adsorbent with highly selective fluorine adsorption capacity. Mechanochemical treatment causes changes in the crystal structure and promotion of chemical reactions in the sample by mechanical energy such as frictional force and impact force [5]. By creating a Ti-OH structure on the surface of titanium oxide materials by mechanochemical treatment, a highly selective fl uorine adsorbent can be expected to be prepared easily.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Highly Selective Fluorine Adsorbent by Mechanochemical Treatment from Titanium Oxide

DEI

Wajima

2022

Int.J.Soc.Mater.Eng.Resour.

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In this study, we aim to prepare a highly selective fl uorine adsorbent by mechanochemical treatment from two types of titanium oxides, rutile and anatase. Fluorine adsorption of the products from rutile and anatase by mechanochemical treatment increased for 60 min regardless of the ball diameter used in mechanochemical treatment, and fl uorine adsorption of the products from rutile and anatase were 1.5 and 2.0 times higher than those of raw materials, respectively. With decreasing pH to 2-3, fl uorine adsorption on products increased to the maximum at pH 2-3. The products can remove fl uoride ion in seawater at pH 2, and fl uorine adsorption behavior followed Langmuir model better than Freundlich model. Maximum adsorption amount of fl uoride ion by products from rutile and anatase were 0.096 and 0.125 mmol/g, respectively. Regardless of the temperature the adsorption rates of products from rutile and anatase follow the pseudo-second order kinetic model than the pseudo-fi rst order kinetics model. The adsorption on the products from rutile and anatase are the endothermic nature of the adsorption process and spontaneous reaction.

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Section: Introductionmentioning

confidence: 99%