Effective treatment of cadmium-cyanide complex by a reagent with combined function of oxidation and coagulation
文献类型：期刊论文
| 作者 | Hu, Chengzhi; You, Liyan; Liu, Huijuan; Qu, Jiuhui |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2015-02-15 |
| 卷号 | 262期号:0页码:96-100 |
| 关键词 | Cyanide Heavy metal Oxidation Coagulation Water treatment |
| 英文摘要 | The treatment of heavy metal-cyanide complex in industrial wastewater generally involves various processing units, such as chemical oxidation, hydrolysis precipitation and coagulation. A novel dual function reagent (PACC), which contains high content of active chlorine and Al-13 polymer, shows a promising potential to shorten the process and heighten the treatment efficiency for cadmium-cyanide complex ([Cd(CN)(4)](2-)). The results indicated that PACC is able to simultaneously achieve the complete oxidation of cyanide (CN-) by active chlorine and the subsequent coagulation of cadmium ion (Cd2+) by Al-13 polymer. Two stagek were carried out for complete CN- oxidation and effective Cd2+ coagulation. The first stage involves the conversion of CN- to cyanate (CNO-), and the second stage involves the conversion of CNO- to nitrogen and the coagulation of the liberated Cd2+. The optimum pH values for the first stage and the second stage are pH 11 and pH 8.5, respectively. The two stages for effective treatment of [Cd(CN)4](2-) at the optimal pH condition totally need about 43 min at active chlorine dosage 130% of the theoretical requirement for CN- decomposition. Under the optimal conditions for [Cd(CN)4]2- treatment, the stoichiometric weight ratio of Cl-2/Al in PACC is 2. This study presents a novel reagent and method to remove heavy metal-cyanide complexes from wastewater. (C) 2014 Elsevier B.V. All rights reserved. |
| 研究领域[WOS] | Engineering, Environmental ; Engineering, Chemical |
| WOS记录号 | WOS:000347577700012 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32760]  |
| 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 | Hu, Chengzhi,You, Liyan,Liu, Huijuan,et al. Effective treatment of cadmium-cyanide complex by a reagent with combined function of oxidation and coagulation[J]. CHEMICAL ENGINEERING JOURNAL,2015,262(0):96-100. |
| APA | Hu, Chengzhi,You, Liyan,Liu, Huijuan,&Qu, Jiuhui.(2015).Effective treatment of cadmium-cyanide complex by a reagent with combined function of oxidation and coagulation.CHEMICAL ENGINEERING JOURNAL,262(0),96-100. |
| MLA | Hu, Chengzhi,et al."Effective treatment of cadmium-cyanide complex by a reagent with combined function of oxidation and coagulation".CHEMICAL ENGINEERING JOURNAL 262.0(2015):96-100. |
入库方式： OAI收割
来源：生态环境研究中心
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