| 锰矿石氧化-磷酸铵镁沉淀预处理焦化废水 |
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| 引用本文： | 黄晓鸣,陈天虎,潘 敏,彭书传,熊长军,常冬寅,何 准.锰矿石氧化-磷酸铵镁沉淀预处理焦化废水[J].环境科学研究,2009,22(6):713-717. |
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| 作者姓名： | 黄晓鸣 陈天虎 潘 敏 彭书传 熊长军 常冬寅 何 准 |
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| 作者单位： | 合肥工业大学资源与环境工程学院,安徽 合肥 230009 |
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| 基金项目： | 安徽省自然科学基金，中国大洋协会项目 |
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| 摘 要： | 针对焦化废水中含有高浓度CODCr，挥发酚和氨氮的特性，提出锰矿石氧化-磷酸铵镁(鸟粪石)沉淀两步预处理焦化废水的方法. 以磷酸、硫酸调节焦化废水pH至1.2，利用锰氧化物在酸性条件下的强氧化性，氧化去除废水中的挥发酚和硫化物，去除率分别为99%和100%，同时CODCr的去除率达70%，出水pH升高至1.8；向上述锰矿石处理后的废水投加菱苦土粉(轻烧氧化镁)进行磷酸铵镁沉淀试验. 结果表明，在固液比为18 g/L，搅拌反应24 h后，氨氮以磷酸铵镁沉淀形式得到去除，去除率达90.1%，pH升高至9.4. X射线粉末衍射(XRD)和透射电镜(TEM)对沉淀产物表征分析表明，磷酸铵镁沉淀是在菱苦土颗粒表面形成和生长的.
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| 关 键 词： | 焦化废水 锰矿石 氧化 菱苦土 磷酸铵镁 |
| 收稿时间： | 2008/10/25 0:00:00 |
| 修稿时间： | 2008/11/13 0:00:00 |
Coking Wastewater Pre-Treatment by Manganese Ore Oxidation and Magnesium Ammonium Phosphate Precipitation |
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| HUANG Xiao-ming,CHEN Tian-hu,PAN Min,PENG Shu-chuan,XIONG Chang-jun,CHANG Dong-yin and HE Zhun.Coking Wastewater Pre-Treatment by Manganese Ore Oxidation and Magnesium Ammonium Phosphate Precipitation[J].Research of Environmental Sciences,2009,22(6):713-717. |
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| Authors: | HUANG Xiao-ming CHEN Tian-hu PAN Min PENG Shu-chuan XIONG Chang-jun CHANG Dong-yin and HE Zhun |
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| Institution: | School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China |
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| Abstract: | To treat coking wastewater which contains high concentrations of COD_(Cr),volatile phenols,and ammonia-nitrogen,a two step method of manganese ore oxidation-magnesium ammonium phosphate(struvite) precipitation was proposed in this study.First,the pH was adjust to 1.2 using phosphoric acid and sulphuric acid,then volatile phenols and sulfide in the coking wastewater were removed by manganese oxides depending on its strong oxidation in acidic condition.The removal efficiencies of COD_(Cr),volatile phenols and... |
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| Keywords: | coking wastewater manganese ore oxidation magnesia magnesium ammonium phosphate |
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