摘要:
含酚废水因可生化性低、难处理、毒性大等特点成为水处理行业的重点和难点。以转炉钢渣为原料,通过不同方法得到酸、碱改性钢渣,利用扫描电镜(SEM)、比表面积测试(BET)等表征手段对改性前后钢渣的结构、性质以及化学成分特征进行分析。采用恒温振荡法将其应用于有机废水苯酚处理。详细讨论了反应时间、钢渣粒径、溶液pH值、钢渣投加量等对有机废水中苯酚去除的影响,寻找最佳处理条件,并对其动力学原理进行分析。结果表明:对于未改性钢渣,最佳处理条件为粒径74~150μm、钢渣投加量8 g/L、反应时间55 min,溶液pH等于4,此时废水中苯酚去除率为41.2%;对于酸、碱改性钢渣,最优条件下废水中苯酚去除率分别为36.08%和38.67%,碱改性钢渣苯酚的去除率整体大于酸改性钢渣。
关键词:
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钢渣 /
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改性 /
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废水 /
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苯酚 /
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去除率 /
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动力学
Abstract:
Phenol-containing waste water has become a major issue in the water treatment industry because of its low biodegradability, intractability, and toxicity. Using steel slag as raw material, acid and alkali modified steel slags are obtained by different methods. Scanning electron microscopy（SEM） and specific surface area（BET） test had been taken to analyze the structure, properties and chemical composition of steel slag before and after modification. The osmotic process was applied to the phenol treatment of organic waste water. The reaction time, steel slag particle size, solution pH, and the like were discussed in detail. The effect of slag dosing amount on the removal of phenol in organic wastewater was investigated. The optimal treatment conditions were determined and the kinetics principle was analyzed. The results showed that for unmodified steel slag the optimal treatment parameters are as follows: particle size in 74～150 μm steel slag dosing amounts 8 g/L, the reaction time 55 minand pH=4, the resulted removal rate of phenol in waste water is 41.2%. For acid and alkali-modified slag the removal rate are 36.08% and 38.67% respectively.
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