铁炭微电解法处理DNT生产废水  

Treatment of Dinitrotoluene Production Wastewater by Iron-carbon Micro-electrolysis Method

作　　者：刘文丽[1] 焦纬洲[1] 刘有智[1] 高璟[1] 苏强 李静[1] 郭亮[1] 许承骋 

机构地区：[1]中北大学山西省超重力化工工程技术研究中心,山西太原030051 [2]甘肃银光化学工业集团有限公司,甘肃白银730900

出　　处：《火炸药学报》2014年第3期33-38,共6页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金资助项目(21206153);山西省高等学校创新人才支持计划资助(201316)

摘　　要：针对DNT生产废水毒性大和难生物降解的特点,采用铁炭微电解法对DNT生产废水进行处理。研究了初始pH值、铁和活性炭质量比、电解质浓度与反应时间对DNT生产废水中硝基化合物及COD去除率的影响。用扫描电镜研究了微电解实验前后铁炭表面的形貌变化。结果表明,在铸铁与活性炭组成的微电解体系中,pH值为1、铁与活性炭的质量比为1.5:1.0、电解质Na_2SO_4质量浓度为300mg/L、反应时间为90min的操作条件下,硝基化合物和COD去除率分别为82.16%和68.43%,BOD_5/CODc,由0.035提高到0.280。反应后的铁炭表面被絮状体及片状晶体覆盖,从而抑制了微电解反应的进行。Based on the characteristics of high toxicity and hard biodegradation of dinitrotoluene（DNT） production wastewater, the DNT production wastewater was treated by an iron-carbon micro-electrolysis method. The effects of initial pH value, iron-carbon mass ratio, electrolyte concentration and reaction time on the removal rate of nitro compounds in dinitrotoluene production wastewater and COD were studied. The variations of iron and carbon surfaces morphologies before and after micro-electrolysis experiment were investigated by scanning electron microscopy. The results show that under the operating conditions of pH value 1, mass ratio of Fe and C 1.5 ： 1.0, electrolyte mass concentration of Na2 SO4 as 300 mg/L and reaction time 90 min in the micro electrolysis system composed of cast iron and activated carbon , the removal rates for nitro compounds and COD were 82.16% and 68.43 %, respectively and the BODs/CODcr is increased from 0. 035 to 0. 280. After the reaction, the surface of the iron and carbon was covered by flocs and flaky crystals and thereby the micro-eletrolysis reaction was inhibited.

关 键 词：应用化学 微电解 DNT生产废水 铸铁屑 COD去除率 化学需氧量(COD) BOD5 CODCR 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] X703.1[环境科学与工程—环境工程]