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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Recycling of Wastewater Containing Iron-Complex Cyanides Using UV Photodecomposition and UV Ozone Oxidation in Combination with an Ion-Exchange Resin Method
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Recycling of Wastewater Containing Iron-Complex Cyanides Using UV Photodecomposition and UV Ozone Oxidation in Combination with an Ion-Exchange Resin Method

机译：紫外光分解和紫外臭氧氧化结合离子交换树脂法回收含铁络合物的废水

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摘要

Wastewater contaminated with iron-complex cyanides was processed by UV photodecomposition accompanied by an iron elimination process using an iron-adsorbent.The wastewater processed by UV photodecomposition was oxidized by ozone combined with UV irradiation.The treated water was deionized by an ion-exchange resin method.This combined processes further increased the production of the pure water volume compared to a single process using an ion-exchange resin.The technique developed in this study can be summarized as follows.First,the iron-complex cyanides in plating wastewater were converted into aquapentacyanoferrate(III)[Fe(CN)5(H_2O)]~(3-)ion.Following the application of UV irradiation,it was decomposed into iron and cyanide(CN~-)ion.The iron was removed from the water in the form of Fe(OH)3 by processing the wastewater with ozone and an iron-adsorbent.The CN~-ion was oxidized to the cyanate(OCN~)form by UV ozone oxidation in a relatively short time.The processed water was de-ionized by passing through cation and anion-exchange resins.The deionized water could be reused as rinsing water in a plating process.The results reported here suggest that wastewater contaminated with chemically stable iron-complex cyanides can be effectively recycled.
机译：紫外光分解伴随着铁吸附剂的除铁处理，处理了被铁络合物氰化物污染的废水;臭氧结合紫外光照射，将紫外光分解处理后的废水氧化;离子交换树脂对处理后的水进行了去离子处理。与使用离子交换树脂的单一工艺相比，该组合工艺进一步提高了纯水产量。本研究开发的技术总结如下：首先，对电镀废水中的铁络合物氰化物进行了转化。生成五水合氰基高铁酸盐（III）[Fe（CN）5（H_2O）]〜（3-）离子。在紫外线照射下，将其分解为铁和氰化物（CN〜-）离子。将铁从水中去除通过臭氧和铁吸附剂处理废水以Fe（OH）3的形式将CN〜离子在相对短的时间内通过UV臭氧氧化氧化为氰酸酯（OCN〜）形式。去离子去离子水可以通过阳离子和阴离子交换树脂，在镀覆过程中可以作为冲洗水重复使用，结果报告表明，化学稳定的铁络合物氰化物污染的废水可以有效地循环利用。

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