钢材酸洗废液制备聚合氯化铁及其絮凝性能
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摘要
采用直接氧化法处理钢材酸洗废液,得到聚合氯化铁(PFC)。将自制的PFC处理微污染的湖水,考察PFC的投加量、湖水的pH、沉降时间、搅拌时间等因素对产品絮凝性能的影响。结果表明,当自制的PFC投加量为150 mg/L、湖水pH值为8~9、搅拌时间7 min、沉降时间为20 min,絮凝效果最佳,对浊度和CODMn的去除率为93.5%和44.8%。
The polymeric ferric chloride( PFC) was obtained by direct oxidation process from steel picking waste liquor. The self-made PFC was used to treat the micro-polluted lake,and the influence of the dosage of PFC,pH value,settling time and stirring time on the flocculation performance of the product was mainly investigated. The results showed that the flocculation effect was the best when the self-made PFC dosage was 150 mg/L,the pH value of the lake water was( 8 ~ 9),the stirring time was 7 min,the settling time was 20 min,the removal rate of turbidity and CODMnwas 93. 5% and 44. 8% respectively.
The polymeric ferric chloride( PFC) was obtained by direct oxidation process from steel picking waste liquor. The self-made PFC was used to treat the micro-polluted lake,and the influence of the dosage of PFC,pH value,settling time and stirring time on the flocculation performance of the product was mainly investigated. The results showed that the flocculation effect was the best when the self-made PFC dosage was 150 mg/L,the pH value of the lake water was( 8 ~ 9),the stirring time was 7 min,the settling time was 20 min,the removal rate of turbidity and CODMnwas 93. 5% and 44. 8% respectively.
引文
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[12]Aktas T S,Fujibayashi M,Takeda F,et al.The role of rapid mixing condition on picophytoplankton floc growth[J].Desalination&Water Treatment,2014,52(7/8/9):1404-1413.
[13]Binahmed S,Ayoub G,Alhindi M,et al.The effect of fast mixing conditions on the coagulation-flocculation process of highly turbid suspensions using liquid bittern coagulant[J].Desalination&Water Treatment,2015,53(12):3388-3396.
[2]Forsberg K M,ke C Rasmuson.Recycling of waste pickle acid by precipitation of metal fluoride hydrates[J].Minerals Engineering,2007,20(9):950-955.
[3]Fang Z,Qiu X,Chen J,et al.Degradation of metronidazole by nanoscale zero-valent metal prepared from steel pickling waste liquor[J].Applied Catalysis B Environmental,2010,100(1/2):221-228.
[4]Agrawal A,Sahu K K.An overview of the recovery of acid from spent acidic solutions from steel and electroplating industries[J].Journal of Hazardous Materials,2009,171(1/2/3):61-75.
[5]唐剑昭,裴毓雯,胡勤海,等.盐酸酸洗废液制备纳米氧化铁[J].环境工程学报,2017(1):371-378.
[6]Macova S,Machova J,Prokes M,et al.Polyaluminium chloride(PAX-18)-acute toxicity and toxicity for early development stages of common carp(Cyprinus carpio)[J].Neuro Endocrinology Letters,2009,30 Suppl 1(1):192-198.
[7]杨忠莲,高宝玉,岳钦艳.氯化铝和聚合氯化铝(PAC)在黄河水中的混凝效果与残留铝含量及组分[J].科学通报,2011(14):1103-1111.
[8]Cao B,Gao B,Liu X,et al.The impact of p H on floc structure characteristic of polyferric chloride in a low DOC and high alkalinity surface water treatment[J].Water Research,2011,45(18):6181-6188.
[9]Yang X L,Song H L,Chen M,et al.Characterizing membrane foulants in MBR with addition of polyferric chloride to enhance phosphorus removal[J].Bioresource Technology,2011,102(20):9490-9496.
[10]鲁秀国,黄林长,段建菊,等.利用酸洗废液制备聚合氯化铁的实验研究[J].华东交通大学学报,2016,33(5):45-50.
[11]周红星.硅改性混凝剂处理煤矿废水的实验研究[J].矿业安全与环保,2015,42(3):21-23.
[12]Aktas T S,Fujibayashi M,Takeda F,et al.The role of rapid mixing condition on picophytoplankton floc growth[J].Desalination&Water Treatment,2014,52(7/8/9):1404-1413.
[13]Binahmed S,Ayoub G,Alhindi M,et al.The effect of fast mixing conditions on the coagulation-flocculation process of highly turbid suspensions using liquid bittern coagulant[J].Desalination&Water Treatment,2015,53(12):3388-3396.