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| Fenton Oxidation Arsenic Removal Treatment of Arsenic and Iron Containing Metallurgical Wastewater |
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Received:February 18, 2023
Revised:February 22, 2023
Accepted:February 28, 2023
Published Online:April 20, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.05.019 |
| KeyWord:Fenton preoxidation neutralization and arsenic removal method; metallurgical wastewater; arsenic removal; toxic leaching |
| Author | Institution |
| ZHANG Shuo |
东北大学冶金学院多金属共生矿生态化冶金教育部重点实验室 |
| YANG Hong-ying |
东北大学冶金学院多金属共生矿生态化冶金教育部重点实验室 |
| CHEN Ya-jing |
东北大学冶金学院多金属共生矿生态化冶金教育部重点实验室 |
| CHEN Guo-min |
东北大学冶金学院多金属共生矿生态化冶金教育部重点实验室 |
| TONG Lin-lin |
东北大学冶金学院多金属共生矿生态化冶金教育部重点实验室 |
| CAI Ya-nan |
东北大学冶金学院多金属共生矿生态化冶金教育部重点实验室 |
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| Abstract: |
| Fenton preoxidation neutralization, arsenic removal method was used to purify arsenic and iron containing metallurgical wastewater. Effects of Fenton oxidant dosage and oxidation time on iron oxidation rate and effects of reagent dosage, reaction time, mixing speed and reaction temperature on arsenic removal were studied through single factor test. The obtained optimum conditions of arsenic removal solution and neutralization slag were compared with the enterprise process parameters. The results show that Fe2+ concentration in wastewater drops from 2.23 g/L to 0.01 g/L with oxidation rate of Fe2+ of 99.55% after adding 5 mL/L hydrogen peroxide (30%) to wastewater for preoxidation for 5 min. Arsenic removal rate is 99.9% under the optimum conditions for arsenic removal include lime dosage 15 g/L, stirring rate of 300 r/min, temperature of 30 ℃, and reaction time of 50 min. The toxic leaching test result of neutralization residue is 0.32 mg/L, which meets the Identification Standard for Hazardous Waste Leaching Toxicity (GB 5085.3—2007), and realizes the harmless treatment of arsenic. |
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