Development of Hybrid Arsenic Removal Filter Using Iron

铁混合除砷过滤器的研制

• 批准号: 18560534
• 负责人: NAKAJIMA Jun
• 金额: $ 2.46万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560534/
• 关键词: Arsenic Removal; Groundwater Pollution; Bangladesh; Water Treatment; Iron Oxidizing Bacteria; Adsorption; Arsenic Removal Filter; International Cooperation

1. Arsenic removal characteristics by iron bacteria : Iron bacteria oxidized ferrous iron to ferric iron and increased the removal efficiency of arsenic(III) in the experiment using synthesized groundwater supposing the chemical ingredient of the groundwater in Bangladesh. On the other hand, the direct oxidization of arsenic(III) to arsenic(V) was not confirmed. Because iron bacteria were detected in the filter of well water in Bangladesh, it was suggested that the arsenic removal method using iron bacteria was applicable in Bangladesh.2. Proposal of hybrid type arsenic removal process : Although the arsenic removal by a metal iron column was checked, the performance decreased at the early stage of the filtration and ferrous iron was eluted from the metal iron. Therefore the arsenic removal performance was examined in the system to which the iron bacteria column and the metal iron column were connected. In order of iron bacteria + metal iron, although removal of arsenic was good, the outflow of ferrous iron to effluent water was detected. On the other hand, in order of metal iron + iron bacteria, the outflow of ferrous iron was stopped with a good performance of arsenic removal.3. Examination of the applicability of an arsenic removal filter : In order to recommend suitable iron hybrid type arsenic removal, the condition and the issues of the existing filter which had been introduced into the farm villages in Bangladesh were investigated. It was necessary, to introduce the inexpensive simple filter that could be manufactured and repaired there accompanied with the introduction of social development activities.

1.铁细菌的除砷特性：在模拟孟加拉国地下水化学成分的实验中，铁细菌将亚铁氧化为三价铁，提高了砷（III）的去除率。另一方面，砷（III）直接氧化为砷（V）的情况未得到证实。由于孟加拉国井水过滤器中检测到铁细菌，因此铁细菌除砷法在孟加拉国是适用的.复合型除砷工艺的建议：虽然金属铁柱除砷得到了验证，但在过滤的早期阶段性能下降，亚铁从金属铁中洗脱出来。因此，在连接有铁细菌柱和金属铁柱的系统中考察了砷的去除性能。按照铁细菌+金属铁的顺序，虽然砷的去除效果较好，但检测到二价铁流出到出水中。另一方面，按照金属铁+铁细菌的顺序，亚铁离子的流出被阻止，砷的去除效果较好.除砷过滤器的适用性检查：为了推荐合适的铁混合型除砷，对孟加拉国农村引入的现有过滤器的条件和问题进行了调查。有必要引入廉价的简单过滤器，可以在那里制造和维修，同时开展社会发展活动。

项目成果

Arsenic removal from ground water by sand filtration during biological iron oxidation

生物铁氧化过程中砂滤除砷

• 发表时间: 2008
• 期刊: Japanese J. Water Treatment Biology Vol.44, No.1
• 作者: Shafiquzzaman;Md.;Iori Mishima;I;Jun Nakajima
• 通讯作者: Jun Nakajima

Evaluation of Existing Arsenic Removal Technologies in Rural Area of Bangladesh

孟加拉国农村地区现有除砷技术评价

• 发表时间: 2008
• 期刊: 日本水環境学会年会講演集 42
• 作者: Md.Shafiquzzaman;Azam Mohammad Shafiul;Iori Mishima and Jun Nakajima
• 通讯作者: Iori Mishima and Jun Nakajima

Evaluation of Arsenic Mobilization in Soil by Acid-Alkali Sequential Extraction

酸碱连续萃取法评价土壤中砷的迁移

• 发表时间: 2007
• 期刊: 日本水環境学会年会講演集 41
• 作者: Md.Shafiquzzaman;Azam Mohammad Shafiul;Iori Mishima and Jun Nakajima;Azam Mohammad Shafiul
• 通讯作者: Azam Mohammad Shafiul

Arsenic Removal and Ferrous Ion Supply by Metal Iron

金属铁的除砷和亚铁离子供应

• 发表时间: 2007
• 作者: Shafiquzzaman Md;Kenich Tomita;Daisuke Yane;Jun Nakajima
• 通讯作者: Jun Nakajima

Arsenic removal from ground water by sand filtration during biologicaluon oxidation

生物氧化过程中砂滤去除地下水中的砷

• 发表时间: 2008
• 期刊: Japanese J.Water Treatment Biology 44(1)
• 作者: Shafiquzzaman;Md.;IoriMishima;I.and Jun Nakajima
• 通讯作者: I.and Jun Nakajima