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| Harmless Treatment of Arsenic-bearing Acidic Wastewater and Speciation and Stability Analysis of Slag |
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Received:November 03, 2017
Revised:November 09, 2017
Accepted:November 14, 2017
Published Online:April 16, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.05.016 |
| KeyWord:arsenic-bearing wastewater; two-stage neutralization; goethite process; pressure oxidation |
| Author | Institution |
| ZHUANG Rong-Chuan |
低品位难处理黄金资源综合利用国家重点实验室 |
| FAN Dao-yan |
低品位难处理黄金资源综合利用国家重点实验室 |
| CHEN Zheng-xian |
低品位难处理黄金资源综合利用国家重点实验室 |
| XU Xiao-yang |
低品位难处理黄金资源综合利用国家重点实验室 |
| LIN Guo-qin |
低品位难处理黄金资源综合利用国家重点实验室 |
| WANG Hong |
低品位难处理黄金资源综合利用国家重点实验室 |
| CAI Chuang-kai |
低品位难处理黄金资源综合利用国家重点实验室 |
| XIONG Ming |
低品位难处理黄金资源综合利用国家重点实验室 |
| HUANG Huai-guo |
低品位难处理黄金资源综合利用国家重点实验室 |
| WANG Chun |
低品位难处理黄金资源综合利用国家重点实验室 |
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| Abstract: |
| Acidic wastewater with high arsenic and iron concentrations from pressure oxidation pretreatment of arsenic-bearing refractory gold ore was treated by two stage neutralization and goethite process. As speciation and long term behavior in slag was analyzed. The results show that both methods can effectively remove free state arsenic and iron from aqueous solution with removal rate of both 99.9% above. Compared with two stage neutralization process, goethite process exhibits superior performance of lower As concentration in disposal waste water, better settling performance of settling rate and underflow concentration of neutralized slurry, fewer slag quantity, and higher long term stability of arsenic-bearing slag. |
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