酚醛缩聚法处理酚醛树脂废水研究
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摘要
采用酚醛缩聚的方法作为酚醛树脂废水前处理工艺,分别探讨了酸性条件和碱性条件下的酚醛缩合反应。结果表明,碱性条件下,最佳反应条件为甲醛2 mL,Ba(OH)21 g,反应时间3 h,反应温度85℃,COD去除率46.7%,挥发酚去除率42.1%,甲醛去除率72.1%。酸性条件下,最佳反应条件为:甲醛3 mL,HCl 4 mL,反应时间3 h,反应温度100℃,COD去除率47.4%、挥发酚去除率84.6%,甲醛去除率-1.0%。酚醛缩聚法可以有效去除废水中高浓度的挥发酚和甲醛,为后续的化学氧化或生物处理提供良好基础。
Pre-treatment of phenolic resin plant effluents containing highly concentrated phenol has been carried out by phenol-aldehyde condensation method.The optimal conditions are determined under acidic conditions and alkaline conditions respectively.The results showed that the optimal conditions were as follows:formaldehyde 2 mL,Ba(OH)2 1 g,reaction time 3 h and reaction temperature 85 ℃,the removal rate of COD,phenol and formaldehyde were 46.7%,42.1% and 72.1% respectively under alkaline conditions.And the optimal conditions were as follows:formaldehyde 3 mL,HCl 4 mL,reaction time 3 h and reaction temperature 100 ℃,the removal rate of COD,phenol and formaldehyde were 47.4%,84.6% and-1.0% under acidic conditions.According to the results,phenol-aldehyde condensation process proved to be an effective method for the pre-treatment of phenolic resin plant effluents containing highly concentrated phenol and formaldehyde,it's providing a good foundation for the subsequent chemical oxidation and biological treatment.
Pre-treatment of phenolic resin plant effluents containing highly concentrated phenol has been carried out by phenol-aldehyde condensation method.The optimal conditions are determined under acidic conditions and alkaline conditions respectively.The results showed that the optimal conditions were as follows:formaldehyde 2 mL,Ba(OH)2 1 g,reaction time 3 h and reaction temperature 85 ℃,the removal rate of COD,phenol and formaldehyde were 46.7%,42.1% and 72.1% respectively under alkaline conditions.And the optimal conditions were as follows:formaldehyde 3 mL,HCl 4 mL,reaction time 3 h and reaction temperature 100 ℃,the removal rate of COD,phenol and formaldehyde were 47.4%,84.6% and-1.0% under acidic conditions.According to the results,phenol-aldehyde condensation process proved to be an effective method for the pre-treatment of phenolic resin plant effluents containing highly concentrated phenol and formaldehyde,it's providing a good foundation for the subsequent chemical oxidation and biological treatment.
引文
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[2]俞立琼,张亚芬,陈建国.酚醛树脂废水的工业化处理[J].广州化工,2010,38(10):170-171.
[3]秦普丰,周惜时,钱柏清,等.Fenton氧化-混凝-活性炭吸附联合工艺处理酚醛树脂废水[J].湖南农业大学学报:自然科学版,2006,32(5):544-547.
[4]刘木权,田许华,陈嘉祺.催化氧化、生化法处理醛酚树脂生产废水[J].广东化工,2011,38(2):125-126.
[5]陈潇,周雪飞,张亚雷,等.酚醛废水处理技术研究进展[J].环境保护科学,2011,37(4):4-6.
[6]朱留学.酚醛树脂废水的回收预处理[J].化工环保,2000,20(2):24-27.
[7]贺启环,方华.酚醛树脂生产废水处理工艺[J].化工环保,2003,23(4):216-220.
[8]国家环保局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[9]任河山,王颖,赵化冰,等.酚降解菌株的分离、鉴定和在含酚废水生物处理中的应用[J].环境科学,2008,29(2):482-487.
[10]Moussavi G,Heiharizad M.Biodegradation of mixture ofphenol and formaldehyde in wastewater using a single-ba-sin MSCR process[J].Journal of Biotechnology,2010(150):240-245.