酸洗废水制备稳定的Fe-Mn双金属材料的研究

摘要研究以酸洗废水为原料，羧甲基纤维素钠（CMC）或聚乙二醇（PEG）为稳定剂合成稳定的铁锰双金属材料。采用扫描电镜-X射线能谱（SEM-EDS）、傅里叶红外光谱（FTIR）、X射线衍射（XRD）等表征方法证实合成的材料即为铁锰双金属，将它用作吸附剂，治理含锑或砷废水。美国环保局标准毒性浸出方法（TCLP）测试结果表明，铁锰材料重金属含量均在规定的限值范围内。从pH、动力学、吸附等温线、热力学等方面研究其吸附行为。研究表明，合成的铁锰材料对锑及砷的吸附效果好，在pH为4时，最大吸附容量分别为 100。6mg/g和40。6 mg/g。铁锰材料对锑和砷的吸附行为均符合伪二级动力学模型，Freundlich模型可以很好地描述锑和砷在铁锰材料上的吸附过程。随着溶液初始pH值升高，铁锰材料对锑或砷的吸附容量降低。研究中合成的铁锰材料在酸性条件下可高效吸附阴离子型重金属，故其用于重金属废水治理前景良好。78105

毕业论文关键词酸洗废水铁锰双金属氧化物重金属废水治理锑砷

毕业设计说明书外文摘要

Title Study on pickling wastewater for fabrication of stabilized Fe-Mn binary oxide

Abstract In this work, Fe–Mn binary oxide was synthesized from pickling wastewater by using CMC or PEG as stabilizer。 The SEM-EDS, FTIR, XRD and other characterization techniques confirmed that the fabricated material was indeed Fe–Mn binary oxide and ultimately served as an adsorbent for the treatment of wastewater containing antimony or arsenic。 Toxicity Characteristic Leaching Procedure (TCLP) results showed that the heavy metal content in fabricated manganese iron material were considerably lower than regulatory levels。 The adsorption behaviors of manganese iron material for Sb(Ⅴ) and As(Ⅴ), such as pH impact, sorption kinetics, sorption isotherms and sorption thermodynamics were studied in a series of batch experiments。 The results indicated that the synthetic material has excellent adsorption performance toward Sb(Ⅴ) and As(Ⅴ), at the pH values 4, their best adsorption amounts are 100。6mg/g for Sb(Ⅴ) and 40。6 mg/g for As(Ⅴ) respectively。 The kinetic analysis displayed that the pseudo-second order model could well describe the adsorption of Sb(Ⅴ) and As(Ⅴ)。 Equilibrium studies showed that the adsorption could be properly described by Freundlich model。 The pH impact results demonstrated that with the increase of pH value, the absorption capacity decreased dramatically。 In conclusion, under acid condition, the synthetic iron manganese material can be highly efficient sorbents for the removal of anionic heavy metals, therefore, it has a promising prospect in the treatment of heavy metal wastewater。

Keywords Pickling wastewater Fe-Mn binary oxide nanoparticles Antimony Arsenic Treatment of heavy metal wastewater

1 引言 1

1。1 酸洗废水现状及处理技术 1

1。1。1 酸洗废水的来源及危害 1

1。1。2 酸洗废水处理技术 1

1。2 水体重金属污染 3

1。2。1 重金属废水来源、危害 3

1。2。2 重金属废水的治理技术 3

1。3 铁-锰双金属氧化物制备及应用 4

1。4 课题的研究目的、意义及内容酸洗废水制备稳定的Fe-Mn双金属材料的研究:http://www.youerw.com/huaxue/lunwen_89927.html