基于新型微界面能量靶向传递的印染废水处理研究  

Dye wastewater treatment based on a novel micro interface energy transfer process in the heterogeneous reaction

作　　者：赵英花[1] 李剑超[1] 刘琰[1] 刘啸乾[1] 毛勇[1] 

机构地区：[1]陕西师范大学环境科学系,西安710062

出　　处：《中国科学：化学》2013年第2期234-241,共8页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(50309011);陕西省攻关计划项目(2011K17-03-06);中央高校基本科研业务专项基金(JK200902019)资助

摘　　要：通过电磁感应实现一种有机废水非均相反应的新型热传递方式,这种方式下,能量靶向作用于固相材料微界面,使固液反应界面温度远大于液相,强化有机污染物的降解过程且降低能耗.并以海绵铁处理偶氮染料直接紫废水为例,考察这种热传导下的处理性能及与感应热量相关的影响因素.通过热量衡算,表征固定床反应器中海绵铁的能量传递并推导出其计算公式;对比研究发现,新型热传导方式下的海绵铁固定床与普通海绵铁固定床相比,具有更好的处理性能,其界面高温的微反应结构更倾向于促进染料降解.感应热与粒径呈负相关,而填充小粒径海绵铁的固定床具有较好的出水效果.反应滤速是其重要参数条件,可通过延长接触时间、提高相界面温度影响出水效果.反应体系表观温度的升高有利于脱色反应的进行.A novel thermal transfer pathway in the aqueous heterogeneous reaction was realized via the electromagnetic induction technology. Under this kind of thermal transfer, the energy acted directly on the solid particle rather than the aqueous phase. The high temperature at micro-interface would enhance the degradation of organic pollutant. In the research, the treatment of direct violet in sponge iron fixed bed reactor was selected to evaluate the performance and techniques of new energy transfer pathway. The induction heat of the filled iron in the reactor was characterized and its mean temperature was deduced on the basic of energy balance between the filled iron and the water phase. A comparative study showed that the novel technology had a better performance in the dye wastewater treatment than common fixed bed, due to the high interphase temperature which tended to promote the degradation process. The iron temperature increased with the increase of particle size, while the column filled with smaller iron particles had a better performance. Filtration rate was an important parameter and would influence the result by changing the contact time and reaction temperature at the micro-interface. Increase of the apparent temperature had a positive effect on the treatment.

关 键 词：感应热 热传递 多相反应 固定床 染料废水 

分 类 号：X703[环境科学与工程—环境工程]