Enhanced destruction of Cu(CN)(3)(2-) by H2O2 under alkaline conditions in the presence of EDTA/pyrophosphate
文献类型：期刊论文
| 作者 | Chen, Fayuan ; Zhao, Xu ; Liu, Huijuan ; Qu, Jiuhui |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2014 |
| 卷号 | 253期号:1页码:478-485 |
| 关键词 | Metal-cyanide complex Hydrogen peroxide EDTA Pyrophosphate Fenton-like reaction |
| ISSN号 | 1385-8947 |
| 中文摘要 | Oxidation of Cu(CN)(3)(2-) in water by H2O2 is less documented. The present study investigated the effects of pH, H2O2 dose and CN-/Cu(I) on oxidation of cu(CN)(3)(2-). Furthermore, oxidation of Cu(CN)(3)(2-) by H2O2 was investigated in the presence of ethylenediaminetetraacetate (EDTA) or pyrophosphate. The results indicated that Cu(CN)(3)(2-) oxidation was more favored at pH 9.5 and 11.0 than at pH 12.0. With the increase of H2O2 dose, rate of cu(cN)(3)(2-) oxidation was accelerated. Oxidation of Cu(CN)(3)(2-) was accelerated with CN-/Cu(I) decreasing from 4.0 to 2.8. In the presence of EDTA or pyrophosphate, oxidation of Cu(CN)(3)(2-) was significantly enhanced. 4.0 mM cyanide was nearly oxidized by 4.8 mM H2O2 in the presence of 1.0 mM EDTA. According to UV-Visible spectra variation of Cu(CN)(3)(2-) solutions, it was found that H2O2 firstly oxidized Cu(CN)(3)(2-) to Cu(CN)(2)(-). The successive oxidation of cyanide from Cu(CN)(2)(-) led to liberation of Cu(I). Cu(I) was oxidized into Cu(II) with formation of hydroxyl radicals (HO) or Cu(III). H2O2 was decomposed of into O-2 in the process. The strong bonding of Cu(II) to EDTA suppressed decomposition of H2O2 into O-2 and enhanced the effective utilization of H2O2 for cyanide destruction. By contrast, complexation of Cu(II) with pyrophosphate enhanced the catalytic redox reaction (Cu(I)/Cu(II) or Cu(I)/Cu(III)), improving cyanide oxidation. The results provide a possible way to improve treatment of Cu(CN)(3)(2-) wastewater by H2O2. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000340213600057 |
| 公开日期 | 2015-03-26 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9543]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Chen, Fayuan,Zhao, Xu,Liu, Huijuan,et al. Enhanced destruction of Cu(CN)(3)(2-) by H2O2 under alkaline conditions in the presence of EDTA/pyrophosphate[J]. CHEMICAL ENGINEERING JOURNAL,2014,253(1):478-485. |
| APA | Chen, Fayuan,Zhao, Xu,Liu, Huijuan,&Qu, Jiuhui.(2014).Enhanced destruction of Cu(CN)(3)(2-) by H2O2 under alkaline conditions in the presence of EDTA/pyrophosphate.CHEMICAL ENGINEERING JOURNAL,253(1),478-485. |
| MLA | Chen, Fayuan,et al."Enhanced destruction of Cu(CN)(3)(2-) by H2O2 under alkaline conditions in the presence of EDTA/pyrophosphate".CHEMICAL ENGINEERING JOURNAL 253.1(2014):478-485. |
入库方式： OAI收割
来源：生态环境研究中心
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