中国科技核心期刊
美国化学文摘社（CAS）数据库
美国EBSCO学术数据库
日本科学技术振兴机构数据库(JST)
氰化尾渣浸出液光催化制备草酸亚铁及再生C2O42-的研究
- 作者：
- 党晓娥|张婷
- 作者单位：
- 西安建筑科技大学冶金工程学院&陕西省黄金与资源重点实验室|西安建筑科技大学冶金工程学院&陕西省黄金与资源重点实验室
基金项目：
- 国家自然科学基金项目（51974221）
详细信息：
- 作者简介：
- 党晓娥(1971—)，女，甘肃庆阳人，副教授，博士，从事有色冶金新技术及冶金二次资源综合利用研究；西安市碑林区雁塔路中段13号，西安建筑科技大学冶金工程学院，710055；E-mail:dxe2371@126.com
- 通讯作者：
- isnull
- PDF下载
Ferrous oxalate prepared and the regeneration of C2O42- from leaching solution of cyanide tailings by photocatalysis
- English Author：
- College of Metallurgical Engineering,Xi’an University of Architecture and Technology&Key Laboratory for Gold and Resources of Shaanxi Province|College of Metallurgical Engineering,Xi’an University of Architecture and Technology&Key Laboratory for Gold and Resources of Shaanxi Province
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
针对草酸浸出氰化尾渣过程产出的大量浸出液资源化利用问题，在分析Fe3＋-H2C2O4-H2O体系中Fe3＋和C2O42-的形态分布及电位-pH图的基?∩希岢霾捎霉獯呋ù斫鲆褐票覆菟嵫翘驮偕C2O42-。初步研究了静态和磁力搅拌状态下浸出液中C2O42-氧化率、铁沉淀率及草酸亚铁沉淀形貌与晶型。结果表明：与静态光催化相比，磁力搅拌虽可缩短光催化时间，强化光催化效果，减小β-FeC2O4·2H2O粒度，但破坏其形貌，并使C2O42-氧化率增加，不利于C2O42-的再生，可根据草酸亚铁的具体使用性能确定相应的光催化条件。采用无污染光催化法回收浸出液中的铁和再生部分C2O42-，实现了浸出液的循环利用，同时开发了以草酸铁配合物为铁源制备FeC2O4的新工艺。
关键词:
氰化尾渣；浸出液；光催化；草酸亚铁；再生
Abstract:
To utilize the large number of leachate resources generated in the process of cyanide tailings leaching by ferrous oxalate,based on the analysis of Fe3＋ and C2O42- forms and distributions in Fe3＋-H2C2O4-H2O system and its potential-pH figure,photocatalysis was proposed to treat the leachate for preparing ferrous oxalate and rege-neration of C2O42- .Under the static and magnetic agitation conditions,the C2O42- oxidation rate,iron precipitation rate,and the morphology and crystal form of ferrous oxalate were preliminarily studied.Results show that compared with the static photocatalysis,the magnetic stirring can shorten the photocatalysis time,strengthen the photocatalysis effect and reduce the particle size of β-FeC2O4·2H2O,but it destroys the morphology and increases the oxidation rate of C2O42- ,which is not good for its regeneration.Photocatalytic conditions can be determined according to the specific performance of ferrous oxalate.A pollution-free photocatalysis is used for the recovery of iron from the leachate and regenerating C2O42- ,which realizes the recycling of leachate.At the same time,a new process of preparing FeC2O4 from the iron oxalate complex as the iron source is developed.
Keywords:
cyanide tailings;leachate;photocatalysis;ferrous oxalate;regeneration