Chelant-induced reclamation of indium from the spent liquid crystal display panels with the aid of microwave irradiation

フォーマット:

論文

責任表示:

Hasegawa, Hiroshi ; Rahman, Ismail M. M. ; Egawa, Yuji ; Sawai, Hikaru ; Begum, Zinnat A. ; Maki, Teruya ; Mizutani, Satoshi

言語:

英語

出版情報:

Elsevier B.V., 2013-06-05

著者名:

Hasegawa, Hiroshi

Rahman, Ismail M. M.

Egawa, Yuji

Sawai, Hikaru

Begum, Zinnat A.

Maki, Teruya

Mizutani, Satoshi

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掲載情報:

Journal of Hazardous Materials

ISSN:

0304-3894      

巻:

254-255

通号:

1

開始ページ:

10

終了ページ:

17

バージョン:

author

概要:

Indium is a rare metal that is mostly consumed as indium tin oxide (ITO) in the fabrication process of liquid crystal display (LCD) panels. The spent LCD panels, termed as LCD-waste hereafter, is an increasing contributor of electronic waste burden worldwide and can be an impending secondary source of indium. The present work reports a new technique for the reclamation of indium from the unground LCD-waste using aminopolycarboxylate chelants (APCs) as the … solvent in a hyperbaric environment and at a high-temperature. Microwave irradiation was used to create the desired system conditions, and a substantial abstraction of indium (≥80%) from the LCD-waste with the APCs (EDTA or NTA) was attained in the acidic pH region (up to pH 5) at the temperature of ≥120. °C and the pressure of ~50. bar. The unique point of the reported process is the almost quantitative recovery of indium from the LCD-waste that ensured via the combination of the reaction facilitatory effect of microwave exposure and the metal extraction capability of APCs. A method for the selective isolation of indium from the extractant solution and recycle of the chelant in solution is also described. © 2013 Elsevier B.V. 続きを見る

URL:

http://hdl.handle.net/2297/34665