摘要
针对硝态氮和氨态氮2种不同类型微污染景观地表水体,研究磁性离子交换树脂(MIEX)的净化作用机理,并针对净化过程中的不足给出解决方案。结果表明,MIEX对硝氮型再生水回补型城市河湖地表水TN、浊度和叶绿素a的去除效果较为理想,去除率分别可达81.13%、90.20%和92.27%;对于氨氮型河水,TN的去除率不明显,仅为17.16%;浊度和叶绿素a的去除率分别为93.14%和44.87%。由此可见,MIEX对硝氮型河水的TN、叶绿素a和荧光类有机物的去除效果都明显优于氨氮型河水。针对MIEX去除中的不足,采用曝气生物滤池法预处理,再投加MIEX净化氨氮型河水,TN和叶绿素a的去除率分别显著提高了38.81%和37.45%;预处理对荧光类有机物的去除并无明显贡献,但此单元可先完成一部分有机物的去除,从而降低系统有机负荷。
Study on mechanism of magnetic ion exchange resin(MIEX) for two different types(nitrate and ammonia) of micro-polluted landscape surface water purification was investigated, and solutions of the lackage of current purification processes were provided. Experimental results show that the removals of TN, turbidity and chlorophyll a for nitrate-based landscape surface water is more effective, which have up to 81.13%, 90.20% and 92.27%, respectively. However, only 17.16%TN removal is not evident for ammonia-type river water, regardless the 93.14% and 44.87% removals of turbidity and chlorophyll a, respectively. Compared with the purification of ammonia-type river water, TN, chlorophyll a and fluorescence organic matter removal are significantly effective by MIEX process. In terms of the lackage of MIEX for ammoniacal river water, 38.81% TN and 37.45% chlorophyll a removal was significantly improved by using BAF as pretreatment of MIEX process. Although BAF pretreatment showed no significant contribution on the removal of fluorescence organic matter, several types of organic matter might be completely removed by this unit, and thereby reducing the organic load of the system.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第S2期27-31,共5页
Environmental Science & Technology
基金
北京市自然科学基金面上项目资助(8112016)
北京市科委重大项目资助(Z121100000212017)
科技创新基地培育与发展工程流域水环境与生态技术北京市重点实验室2012年度阶梯计划项目资助(Z121109009212050)
