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| Removal of Cu2+ from Wastewater with Zero-valent Iron Prepared from Sulfuric Acid Residue and Blast Furnace Ash |
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Received:April 24, 2022
Revised:April 25, 2022
Accepted:May 06, 2022
Published Online:August 11, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.09.023 |
| KeyWord:sulfuric acid residue; blast furnace ash; carbothermic reduction; zero-valent iron; Cu2+ |
| Author | Institution |
| GAO En-xia |
山东理工大学 资源与环境工程学院;山东招金科技有限公司 |
| WEN Wei-xiang |
山东理工大学 资源与环境工程学院 |
| ZHANG Chun |
山东理工大学 资源与环境工程学院 |
| HE Jiang-hao |
山东理工大学 资源与环境工程学院 |
| WANG Wan-rui |
山东理工大学 资源与环境工程学院 |
| SUN Xue-xin |
山东理工大学 资源与环境工程学院 |
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| Abstract: |
| Zero-valent iron(ZVI) was prepared from industrial solid waste sulfuric acid residue(SAR) and blast furnace ash(BFA) by carbothermic reduction and used to remove Cu2+ from wastewater. Effects of preparation conditions and reaction conditions on removal rate of Cu2+ were investigated. The results show that iron oxide in SAR and BFA can be reduced to ZVI using the reducibility of BFA, and Cu2+ from wastewater can be removed by ZVI. The removal effect of Cu2+ from wastewater can be optimized by rising BFA dosage and reduction temperature, and prolonging reduction time in a certain range. The ZVI obtained when BFA dosage is 50% and reduced at 1 200 ℃ for 60 min has best effect on removal of Cu2+ from wastewater, and the ZVI can be applied to wide range of pH value and high initial concentration of Cu2+. Cu2+ is reduced to Cu0 by ZVI and then adsorbed on the surface of ZVI to be removed. When ZVI dosage is 0.75 g/L, pH value and Cu2+ initial concentration of wastewater is 4 and 100 mg/L respectively, the removal rate of Cu2+ is 93.05%. This study can provide reference for comprehensive utilization of SAR and BFA and removal of Cu2+ from wastewater using ZVI. |
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