| 聚硅硫酸铁混凝去除石化废水二级出水中有机污染物的研究 |
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| 引用本文： | 祁佩时,李立君.聚硅硫酸铁混凝去除石化废水二级出水中有机污染物的研究[J].环境污染与防治,2010,32(3). |
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| 作者姓名： | 祁佩时 李立君 |
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| 作者单位： | 哈尔滨工业大学,城市水资源与水环境国家重点实验室,黑龙江,哈尔滨,150090 |
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| 基金项目： | 国家高技术研究发展计划("863计划")项目 |
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| 摘 要： | 采用聚硅硫酸铁(PFSiS)混凝剂对石化废水二级出水进行了强化混凝实验,考察其对有机污染物的去除效果,并对不同时期的絮体微观结构进行了研究。结果表明,PFSiS可有效去除水中COD,当PFSiS投加量为40 mg/L(以Fe计),静置时间为120 min,COD去除率可达50%左右;絮体的微观结构为空间网状结构,随静置时间的延长,絮体密实程度提高,颜色加深。
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| 关 键 词： | 石化废水 混凝 有机污染物 微观结构 |
Research on removal of organics in bio-treated petrochemical wastewater using poly ferric silicate sulphate coagulant |
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| Abstract: | The poly ferric silicate sulphate (PFSiS) was prepared and applied for the enhanced coagulation treatment of bio-treated petrochemical wastewater. The efficiency of PFSiS for organic contaminants removal was investigated and the microstructure of floc at different coagulation stages was observed by video microscope. PFSiS presented the perfect efficiency of COD removal, the optimum coagulation conditions were coagulant dosage of 40 mg/L (counted by Fe) and settling time of 120 min. Under these operating conditions, COD removal rate could reach 50%. The obtained floc appeared space reticulated structure, and the density and color of floc increased with increasing of the settling time. The GC/MS spectra of petrochemical wastewater before and after coagulation showed that large amount of refractory organics contained in bio-treated petrochemical wastewater, and 48% of COD was removed after coagulation. |
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| Keywords: | petrochemical wastewater coagulation organic contaminants microstructure |
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