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

doi:10.11872/j.issn.1005-2518.2018.01.124

Gold Science and Technology >

2018 , Vol. 26 >Issue 1: 124 - 129

DOI: https://doi.org/10.11872/j.issn.1005-2518.2018.01.124

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

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School of Metallurgy，Northeastern University，Shenyang 110819，Liaoning，China

Received date: 2017-07-10

Revised date: 2017-08-19

Online published: 2018-05-19

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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

Cite this article

CHEN Yajing , YANG Hongying , TONG Linlin , JIN Zhenan . Study on Arsenic Removal from Bacterial Oxidation of Liquid Arsenical Ores and Stability of Arsenic Calcium Residue[J]. Gold Science and Technology, 2018 , 26(1) : 124 -129 . DOI: 10.11872/j.issn.1005-2518.2018.01.124

References

[ 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，2008，35（3）： 557-563.Tian Xiaojuan，Du Deping，Peng Li’e，et al. Bacterial leaching of refractory gold ore［J］.Geology in China，2008，35（3）： 557-563.

[ 2 ] 周爱东，杨红晓. 金的生物冶金发展［J］.有色矿冶，2005，21（3）： 25-27.Zhou Aidong，Yang Hongxiao. Controlindustrial fluorine&accelerate sustainable development［J］.Non-ferrous Mining and M etal lurgy，2005，21（3）：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，2006，25（2）： 100-102.Li Yulin. Removal of arsenic from bacteria oxidation lixivum by neutralization with calcium hydroxide［J］.Hydrom etal lurgy of China，2006，25（2）：100-102.

[ 4 ] Randall P M. Arsenic encapsulation using Portland cement with ferrous sulfate/lime and Terra-Bond™ technologies - Microcharacterization and leaching studies［J］.Science of the Total Environment，2012，420： 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 Extraction［D］.Shenyang：Northeastern University，2010.

[ 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，2016，67（11）： 4533-4540.Ke Pingchao，Liu Zhihong，Liu Zhiyong，et al. Research status on composition，structure，and leaching stability of an arsenic solidification mineral scorodite［J］.CIESC Journal，2016，67（11）：4533-4540.

[ 7 ] Dove P M，Rimstidt J D. Solubility and stability of scorodite，FeAsO₄·2H₂O：reply［J］.American Mineralogist，1987（72）：845-848.

[ 8 ] Fujita T，Taguchi R，Abumiya M，et al. Novel atmospheric scorodite synthesis by oxidation of ferrous sulfate solution. Part II. Effect of temperature and air［J］.Hydrometallurgy，2008，90（2/3/4）： 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，2013，20（3）： 53-57.Jia Hai，Tang Xincun，Liu Jie，et al. Experimental study on the stabilization of arsenic-containing waste residue and the treatment of high-arsenic wastewater［J］.Safety and Environmental Engineering，2013，20（3）：53-57.

[ 10 ] Manning B A，Fendorf S E，Bostick B，et al. Arsenic（Ⅲ） oxidation and arsenic（Ⅴ） adsorption reactions on synthetic birnessite［J］.Environmental Science & Technology，2002，36（5）：976-981.

[ 11 ] Tournassat C，Charlet L，Bosbach D，et al. Arsenic（Ⅲ） oxidation by birnessite and precipitation of manganese（Ⅱ） arsenate［J］.Environmental Science & Technology，2002，36（3）： 493-500.

[ 12 ] 谭春梅. 砷的管理和稳定化［J］.中国有色冶金，2017，46（2）： 1-6.Tan Chunmei. Arsenic management and stabilization［J］.China Nonferrous M etal lurgy，2017，46（2）：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，2011，21（3）： 694-699.Cui Richeng，Yang Hongying，Fu Yao，et al. Biooxidation-cyanidation leaching of gold concentrates with different arsenic types ［J］.The Chinese Journal of Nonferrous Metals，2011，21（3）：694-699.

[ 14 ] 黄宝贵. 高含量砷（Ⅲ）与砷（Ⅴ）的萃取分离法研究［J］.冶金分析，1995，15（4）： 7-11.Huang Baogui. Investigation on the method of extraction-separation for high contents of As（Ⅲ） and As（Ⅴ）［J］. M etal lurgical Analysis，1995，15（4）：7-11.

[ 15 ] 钟正美. 快速碘量法测定微量砷［J］.铀矿冶，1986（3）： 67-69.Zhong Zhengmei. Determination of trace arsenic by rapid iodometric method［J］.Uranium Mining and M etal lurgy，1986（3）：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，2014，8（6）： 2205-2210.Yang Zhongchao，Zhu Lijun，Liu Ruiping，et al. Economic evaluation on technologies for treatment of strongly-acidic wastewater with high arsenic concentrations［J］.Chinese Journal of Environmental Engineering，2014，8（6）：2205-2210.

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