img

QQ群聊

img

官方微信

高级检索

黄金科学技术 ›› 2018, Vol. 26 ›› Issue (1): 124-129.doi: 10.11872/j.issn.1005-2518.2018.01.124

• 冶炼技术与装备研发 • 上一篇    

含砷矿石细菌氧化液除砷实验及砷钙渣稳定性研究

陈亚静,杨洪英*,佟琳琳,金哲男   

  1. 东北大学冶金学院,辽宁 沈阳 110819
  • 收稿日期:2017-07-10 修回日期:2017-08-19 出版日期:2018-02-28 发布日期:2018-05-19
  • 通讯作者: 杨洪英(1960-),女,河北张家口人,教授,从事贵金属冶金、生物冶金等方面的研究工作。yanghy@smm.neu.edu.cn
  • 作者简介:陈亚静(1990-),女,河南新乡人,博士研究生,从事细菌氧化废水除砷、固砷方面的研究工作。925082243@qq.com
  • 基金资助:

    国家自然科学基金项目“含砷复杂金矿细菌氧化矿物界面能及其作用机制的基础研究”(编号:U1608254)和“难浸含砷金矿细菌氧化过程中[AsS]2-→As(Ⅲ)-As(ⅴ)转化机理研究”(编号:51374066)联合资助。
     

Study on Arsenic Removal from Bacterial Oxidation of Liquid Arsenical Ores and Stability of Arsenic Calcium Residue

CHEN Yajing,YANG Hongying,TONG Linlin,JIN Zhenan   

  1. School of Metallurgy,Northeastern University,Shenyang    110819,Liaoning,China
  • Received:2017-07-10 Revised:2017-08-19 Online:2018-02-28 Published:2018-05-19

摘要:

以甘肃某金矿经细菌氧化提金后产生的高砷、高铁强酸性细菌氧化液为研究对象,并选择CaO作为沉淀剂进行中和除砷实验,考察pH值、温度、搅拌速度和反应时间等对中和除砷的影响,通过单因素实验确定最佳除砷条件,并探究在模拟自然环境下各因素对砷钙渣稳定性的影响。除砷实验结果表明:在pH=4~5、搅拌速度适宜及常温下反应25 min时,除砷率可达99.99%,实现了废水净化;砷钙渣定量分析结果表明:渣中As、Fe质量分数分别为4.04%和19.79%;模拟自然环境下砷钙渣稳定性影响实验结果表明:当环境pH≤1时,砷钙渣中的砷被溶出了5 mg/L,超过工业废水排放标准。通过试验发现,选择CaO作为沉淀剂对细菌氧化液进行中和除砷,可以实现废水净化,并且当含砷渣所处环境pH≥1时可以稳定存放。

关键词: 细菌氧化液, 中和除砷, 单因素实验, 除砷率, 砷铁共沉, 砷钙渣, pH, 稳定性

Abstract:

Taking strong acid bacterial oxidation liquid with high arsenic and high iron produced by the bacterial oxidation gold extraction of one gold mine in Gansu Province as the research object,and selecting calcium oxide as precipitant to carry out the experiment of neutralization and arsenic removal.Through investigated the effect of the parameters such as pH value,temperature,stirring speed and reaction time on neutralization and arsenic removal,the best arsenic removal conditions were determined by single factor test. The influence of arsenic and calcium residue stability in simulated natural environment was explored.The results of arsenic removal test showed that the arsenic removal ratio was 99.99% under the optimal condition:pH=4~5,suitable stirring speed,reaction for 25 min at normal temperature and achieved the purification of waste liquid.The results of quantitative analysis of arsenic and calcium residue showed that the content of As and Fe in residue were 4.04% and 19.79% respectively.The experimental results on the stability of arsenic and calcium residue in simulated natural environment showed that:when the pH value was lower than 1,the arsenic in residue was dissolved out of 5 mg/L,exceeding emission standards of industrial waste.According to the results,it is possible to purify the wastewater by neutralizing arsenic with calcium oxide as precipitant,and the arsenic containing could be stored when the environmental pH≥1.

Key words: bacterial oxidation liquid, neutralization and arsenic removal, single factor experiment, arsenic removal radio, arsenic iron coprecipitation, arsenic and calcium residue;pH;stability

中图分类号: 

  • TF18
 
[ 1 ] 田晓娟,杜德平,彭立娥,等. 金矿的细菌浸出处理研究[J.中国地质,2008353): 557-563.Tian XiaojuanDu DepingPeng Li’eet al. Bacterial leaching of refractory gold oreJ.Geology in China2008353): 557-563.
[ 2 ] 周爱东,杨红晓. 金的生物冶金发展[J.有色矿冶,2005213): 25-27.Zhou AidongYang Hongxiao. Controlindustrial fluorine&accelerate sustainable developmentJ.Non-ferrous Mining and M etal lurgy2005213):27-29.
[ 3 ] 李育林. 含砷细菌氧化浸出液氢氧化钙中和脱砷试验研究[J.湿法冶金,2006252): 100-102.Li Yulin. Removal of arsenic from bacteria oxidation lixivum by neutralization with calcium hydroxideJ.Hydrom etal lurgy of China2006252):100-102.
[ 4 ] Randall P M. Arsenic encapsulation using Portland cement with ferrous sulfate/lime and Terra-Bond™ technologies - Microcharacterization and leaching studiesJ.Science of the Total Environment2012420 300.
[ 5 ] 张硕. 难浸金矿细菌氧化提金废水净化试验研究[D.沈阳:东北大学,2010.Zhang Shuo. Bacterial Oxidation of Refractory Gold Ore and Purification of Gold ExtractionD.ShenyangNortheastern University2010.
[ 6 ] 柯平超,刘志宏,刘智勇,等. 固砷矿物臭葱石组成与结构及其浸出稳定性研究现状[J.化工学报,20166711): 4533-4540.Ke PingchaoLiu ZhihongLiu Zhiyonget al. Research status on compositionstructureand leaching stability of an arsenic solidification mineral scoroditeJ.CIESC Journal20166711):4533-4540.
[ 7 ] Dove P MRimstidt J D. Solubility and stability of scoroditeFeAsO4·2H2OreplyJ.American Mineralogist198772):845-848.
[ 8 ] Fujita TTaguchi RAbumiya Met al. Novel atmospheric scorodite synthesis by oxidation of ferrous sulfate solution. Part II. Effect of temperature and airJ.Hydrometallurgy2008902/3/4): 85-91.
[ 9 ] 贾海,唐新村,刘洁,等. 高砷废水处理及含砷废渣稳定化的试验研究[J.安全与环境工程,2013203): 53-57.Jia HaiTang XincunLiu Jieet al. Experimental study on the stabilization of arsenic-containing waste residue and the treatment of high-arsenic wastewaterJ.Safety and Environmental Engineering2013203):53-57.
[ 10 ] Manning B AFendorf S EBostick Bet al. Arsenic oxidation and arsenic adsorption reactions on synthetic birnessiteJ.Environmental Science & Technology2002365):976-981.
[ 11 ] Tournassat CCharlet LBosbach Det al. Arsenic oxidation by birnessite and precipitation of manganese arsenateJ.Environmental Science & Technology2002363): 493-500.
[ 12 ] 谭春梅. 砷的管理和稳定化[J.中国有色冶金,2017462): 1-6.Tan Chunmei. Arsenic management and stabilizationJ.China Nonferrous M etal lurgy2017462):1-6.
[ 13 ] 崔日成,杨洪英,富瑶,等. 不同含砷类型金矿的细菌氧化氰化浸出[J.中国有色金属学报,2011213): 694-699.Cui RichengYang HongyingFu Yaoet al. Biooxidation-cyanidation leaching of gold concentrates with different arsenic types J.The Chinese Journal of Nonferrous Metals2011213):694-699.
[ 14 ] 黄宝贵. 高含量砷()与砷()的萃取分离法研究[J.冶金分析,1995154): 7-11.Huang Baogui. Investigation on the method of extraction-separation for high contents of As and As)[J. M etal lurgical Analysis1995154):7-11.
[ 15 ] 钟正美. 快速碘量法测定微量砷[J.铀矿冶,19863): 67-69.Zhong Zhengmei. Determination of trace arsenic by rapid iodometric methodJ.Uranium Mining and M etal lurgy19863):67-69.
[ 16 ] 杨中超,朱利军,刘锐平,等. 强酸性高浓度含砷废水处理方法与经济性评价[J.环境工程学报,201486): 2205-2210.Yang ZhongchaoZhu LijunLiu Ruipinget al. Economic evaluation on technologies for treatment of strongly-acidic wastewater with high arsenic concentrationsJ.Chinese Journal of Environmental Engineering201486):2205-2210.
No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!