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煤气化废水中有机物对磷酸铵镁结晶法去除氨氮的影响-环境化学.PDF

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第33卷  第 11期 环  境  化  学 Vol. 33,No. 11 2014年    11月 ENVIRONMENTAL CHEMISTRY November 2014 DOI:10.7524/j.issn.0254⁃6108.2014.11.010 煤气化废水中有机物对磷酸铵镁结晶法去除氨氮的影响∗ ∗∗ 胡学伟   靳松望  王亚冰  夏丽娟  张雅琳 (昆明理工大学环境科学与工程学院,昆明,650500) 摘  要  研究了杂环类(吡啶、喹啉)和酚类(间甲酚、二甲酚、苯酚)有机物对磷酸铵镁结晶法(MAP, magnesium ammonium phosphate)处理废水中氨氮的影响.研究表明,杂环和酚类有机物均对 MAP 法的除氮效 果产生抑制作用,杂环类有机物的抑制作用大于酚类有机物,其中加入吡啶、喹啉、间甲酚、二甲酚、苯酚相比 -1 -1 于对照组(21mg·L ),氨氮残余浓度分别升高45.17、56.66、43.01、50.68、49.72 mg·L .因为络合作用和吸附 作用,多组分体系MAP 晶体产生的抑制作用强于单一组分体系. 关键词  杂环类有机物,酚类有机物,MAP,氨氮,煤气化废水. Effect of organics in coal gasification wastewater on ammonia nitrogen removal by magnesium ammonium phosphate precipitation ∗∗ HUXuewei     JIN Songwang    WANG Yabing    XIA Lijuan    ZHANG Yalin (College of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming,650500,China) Abstract:Lab⁃scale batch experimentswere carried out to investigatethe effectsof heterocyclic and phenolic compounds on the ammonia nitroger removal by magnesium ammonium phosphate (MAP) crystallization. The morphology of the precipitates obtained was observed with microscope,and the concentration of heterocyclic and phenolic compoundswas analyzed by HPLC. The results show that heterocyclicandphenoliccompoundssuppressedammoniumnitrogenremovalby MAP crystallization. With the addition of pyridine, quinoline, m⁃cresol, dimethylphenol and phenol, the residual -1 -1 ammonium nitrogen increased by 45.17, 56.66, 43.01, 50.68 mg ·L and 4972 mg ·L ,
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