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| Study on Treatment of High Concentration Ammonia Nitrogen Wastewater from Vanadium Shale Extraction by Stripping-Ion Exchange Coupling Process |
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Received:January 23, 2019
Revised:January 24, 2019
Accepted:January 28, 2019
Published Online:May 17, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.06.015 |
| KeyWord:vanadium precipitated wastewater; ammonia nitrogen; air stripping; ion exchange |
| Author | Institution |
| Zheng Qiaoqiao |
武汉理工大学资源与环境工程学院 |
| Zhang Yimin |
武汉理工大学资源与环境工程学院 |
| Huang Jing |
钒资源高效利用湖北省协同创新中心;矿物资源加工与环境湖北省重点实验室 |
| Bao Shenxu |
钒资源高效利用湖北省协同创新中心;武汉理工大学资源与环境工程学院 |
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| Abstract: |
| High concentration ammonia nitrogen wastewater from vanadium shale extraction was treated by air stripping-ion exchange coupling process. Firstly, effects of pH value, temperature and volume ratio of gas to liquid (G/L, L/L) on removal efficiency of ammonia nitrogen from vanadium precipitation wastewater were investigated. Secondly, effects of pH value, flow rate and series number on resin adsorption were studied. Finally, adsorption stability of resin for ammonia nitrogen was studied. The results show that the optimum conditions for stripping include pH value of 10.5, temperature of 40 ℃ and G/L of 3 200, concentration of ammonia nitrogen is 1 999.56 mg/L after stripping. Suitable pH value of resin adsorption is 8 and flow rate is 9 mL/min. Ammonia nitrogen removal rate is 99% above after two-stage series adsorption and desorption rate of ammonia nitrogen by volume concentration of 18% of sulfuric acid is 99% above. After 10 cycles of adsorption and desorption, the adsorption performance of resin is stable. |
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