Development of a New Type of Adsorbent that can be Collected Easily on the Surface of Water after Adsorption at the Bottom of Water

Mihara, Yoshihiro; Tanaka, Shunitz

doi:10.5985/jec.23.187

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…8. 17 In order to confirm the usefulness of the novel adsorbent, we demonstrated the removal of 80 mg of PbSO4, which existed at the bottom of a water column (length of 80 cm), by using alginate gel beads with 5 wt% CaCO3 and CO2 bubbles. The addition of 300 alginate gel beads to the column was repeated eight times and the 300 gel beads first sank down to the bottom of the column, but all of them could be collected on the surface of water within 3 h. The concentration of lead ions at the bottom and the middle of the column was measured.…”

Section: Development Of Novel Adsorbent That Can Float Up To the Watementioning

confidence: 97%

Development of Separation Technologies for Environmental Remediation

Tanaka

2018

ANAL. SCI.

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This paper introduces some studies on the development of separation technologies for environmental remediation that have been performed in my laboratory over the past 20 years. The studies are related mainly to the development of easily collectable adsorbents and eco-friendly remediation technologies to remove pollutants from contaminated environments. First, the investigation of pollution in the Songhua River in China is described because it was that research that gave me the opportunity to consider the necessity of an easily collectable adsorbent. Then, the separation methods using the modified magnetite to remove pollutants by a magnet are introduced and the development of adsorbents that can float up to the water surface after adsorption at the bottom of the water is described. Electrochemical methods to accumulate pollutants in water on a carbon fiber electrode and electro-kinetic remediation to remove pollutants in soil are also introduced.

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Section: Development Of Novel Adsorbent That Can Float Up To the Watementioning

confidence: 97%

Development of Separation Technologies for Environmental Remediation

Tanaka

2018

ANAL. SCI.

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Easily Collectable Floating-Up Adsorbents to Remove Pollutants

Mihara

Tanaka

2022

The Handbook of Environmental Chemistry

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Development of Shuttle Adsorbents between the Bottom and Surface of Water for the Adsorption of Pollutants

Mihara

2021

YAKUGAKU ZASSHI

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For various pollutants with diŠerent speciˆc gravity values, adsorbents having similar speciˆc gravity values as those of target pollutants are necessary to achieve enough contact time. The purpose of this work is to introduce a selfvertical migration system to adsorbents for wastewater treatment. An alginate hydrogel composite with controlled speciˆc gravity and buoyancy was successfully developed, which canˆrst sink to the bottom of water and then ‰oat up on the surface after the adsorption. The alginate hydrogel composite was prepared using an alginate solution containing both glucose and yeast. In an experiment, the obtained beadsˆrst sank. However, 30 min later, most of them ‰oated up to the water surface, where carbon dioxide was generated in the fermentation process. This behavior was repeated several times during the fermentation process, causing the beads to ‰oat. To conˆrm the e‹ciency of this unique property, the removal of cesium ions was demonstrated in a water column using Prussian Blue modiˆed alginate gel beads with a repeated vertical migration system. The adsorbent showed a faster removal of cesium than the other adsorbents without the proposed system. We believe that the proposed system can be applied to treat large volumes of wastewater that cannot be stirred or pumped. Therefore, the novel adsorbent developed in this study is expected to signiˆcantly contribute to environmental remediation.

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Development of a New Type of Adsorbent that can be Collected Easily on the Surface of Water after Adsorption at the Bottom of Water

Cited by 4 publications

References 16 publications

Development of Separation Technologies for Environmental Remediation

Development of Separation Technologies for Environmental Remediation

Easily Collectable Floating-Up Adsorbents to Remove Pollutants

Development of Shuttle Adsorbents between the Bottom and Surface of Water for the Adsorption of Pollutants

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