2013 Fiscal Year Final Research Report
Control of arsenic adsorption and arsenic desorption properties of novel porous iron particles for application to arsenic recovery process
| Project/Area Number |
24656452
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Metal making engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
SUZUKI Shigeru 東北大学, 多元物質科学研究所, 教授 (40143028)
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| Co-Investigator(Kenkyū-buntansha) |
SHINODA Kozo 東北大学, 多元物質科学研究所, 准教授 (10311549)
FUJIEDA Shun 東北大学, 多元物質科学研究所, 助教 (60551893)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 金属生産工学 / 廃棄物処理 / 非鉄金属製錬 / 水処理 |
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| Research Abstract |
The porous particles of maghemite are synthesized from hydrated iron arsenite and hydrated iron phosphate particles such as scorodite, strengite and metastrengite. Such particles are candidates of arsenic adsorbents, because these exhibit large specific surface and superior filterability. In this study, arsenic adsorption and arsenic desorption properties were investigated under different solution conditions. The arsenic adsorption capacity was increased with decreasing pH. The arsenic adsorbed on porous particles was desorbed by the immersion in an alkaline solution. In addition, the arsenic desorption was accelerated by the immersion of a metallic iron plate. Such behavior is attributable to the decrease of electrical potential in the solution.
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