摘要硝基苯是一种常见的有毒有机污染物,其化学性质稳定,难以直接进行生物降解,因此非生物还原转化是一条必由途径。本文研究了Fe2+体系对硝基苯的还原转化过程,对其不同工况因素与反应机理进行了探讨和研究。78103
本实验先将钢渣/Fe2+体系与其他铁矿物/Fe2+体系去除硝基苯情况进行了对比,认为在钢渣/Fe2+体系下不需要加碱调节pH,且钢渣较为廉价,并进一步研究了钢渣/Fe2+的反应规律。
在存在微量溶解氧,pH>10,钢渣粒径60目,Fe2+浓度400mg/L条件下,钢渣/Fe2+还原硝基苯,其对硝基苯有明显的还原效果,其还原去除率约为80%。经液质联用(LC-MS)检测,其还原产物为苯胺。
钢渣/Fe2+体系的反应机理不同于NaOH/Fe2+体系,钢渣可以代替NaOH为反应体系提供碱性环境,也可以和Fe2+结合形成活性物质,增加还原性果。此外,用钢渣处理硝基苯废水,不仅可以节约成本和资源,更可以实现废物资源化,具有广阔的应用前景。
毕业论文关键词 钢渣 亚铁离子 硝基苯 还原
毕业设计说明书外文摘要
Title Catalytic reduction of nitrobenzene containing was tewater treatment technology
Abstract Nitrobenzene is a common toxic organic pollution that chemical property is stable to difficultly biodegradable,so non-biological reductive transformation is a must by the way。This paper studies the system Fe2 + reduction of nitrobenzene conversion, discussed and studied factors and reaction mechanisms of different conditions。
The first experiment is a comparison that slag / Fe2 + system and other iron minerals/ Fe2 + systems remove nitrobenzene ,we conclude that slag / Fe2 + no need to add base to adjust pH, and steel slag is less expensive , therefore ,we study slag / Fe2 + Mechanism further。
Under this condition( low oxygen concentration, pH >10,slag particle size is 60 mesh,Fe2+ concentration is 400 mg/L),Nitrobenzene is converted to aniline efficiently by the slag / Fe2 + system’s reduction and Slag / Fe2 + system reduction rate can reach close to 80% under optimal conditions。By liquid mass spectrometry (LC-MS) detection, the reduced product aniline。
Slag / Fe2 + system reaction mechanism is not completely same as NaOH / Fe2 + system,slag can be used instead of NaOH to provide an alkaline reaction system, and can also be combined form Fe2 + to increase the reactivity。In addition,treatment of nitrobenzene wastewater using slag / Fe2 + system can not only save costs and resources, but also reuse the waste, so it has broad application prospects。
Keywords slag Fe2+ nitrobenzene reduction
目 录
1 绪论 1
1。1 硝基苯的性质和危害 1
1。2 硝基苯废水处理现状 1
1。2。1 物理处理方法 1
1。2。2 化学处理方法 2
1。2。3 生物降解方法 3
1。3 表面结合铁还原介绍 3
1。4 钢渣的资源化利用 4
1。4。1 钢渣的产生和性质 4
1。4。2 钢渣在环境中的应用 4
1。5 本论文选题思路、研究意义 5
1。5。1 本论文选题思路