期刊论文

Preparation of Nano Fe~0/FeS Composite for Degradation of Azo Dye Wastewater

中文

水处理技术

1000-3770

2019

45

3

23-27

10.16796/j.cnki.1000-3770.2019.03.005

国家自然科学基金(41771353) 湖南农业大学1515人才培养基金.

本校为第一机构

以Na_2S为硫源成功制备了比表面积为29.61 m~2/g、含有纳米Fe~0、少量FeS及铁氧化物的纳米S-nZVI新型复合材料,用于典型偶氮染料甲基橙的降解。优化了材料的硫化率、投加量和初始甲基橙含量等降解工艺参数,并研究了不同硫化率下S-nZVI降解甲基橙的动力学。结果表明,S-nZVI材料的硫化率和投加量等因素对甲基橙降解效率具有较大的影响,而甲基橙初始含量对其影响并不大。当甲基橙初始质量浓度为20 mg/L,控制优化降解条件S-nZVI硫化率(Fe~0、FeS的摩尔比)为3:1,投加量为70 mg,反应10 min左右,降解率接近100%。反应40 min时,S-nZVI降解甲基橙符合准1级反应动力学。合成的纳米S-nZVI新型复合材料具有很...

Na2S was adopted as sulfur source for preparing nano Fe0/FeS(S-nZVI) composite with specific surface area of 29.61 m2/g, and containing nano Fe0, a little FeS and iron oxides. The composite was used for a typical azo dye(methyl orange) degradation. The degradation technological parameters of sulfidation rate, the dosage of the composite and the initial content of methyl orange were optimized and the degradation kinetics of methyl orange by S-nZVI under different sulfidation rate was also investigated. The results showed that the sulfidation rate and the dosage of S-n ZVI composite had a great ...