铁碳微电解填料制备及其降解黄药研究

孙慧娜; 杨淑珍; 韩桂洪; 黄艳芳; 苏胜鹏

doi:10.13779/j.cnki.issn1001-0076.2020.01.002

铁碳微电解填料制备及其降解黄药研究

郑州大学化工学院，河南郑州 450001

基金项目:
国家自然科学基金（51974280）

详细信息

作者简介: 孙慧娜(1994-), 女, 河南洛阳人, 硕士研究生, 化学工程专业, E-mail:shnzzu@126.com

通讯作者: 韩桂洪(1981-), 男, 河北昌黎人, 博士, 教授, 主要从事矿物资源加工、冶金矿山生态与环保研究工作, E-mail:hanguihong@zzu.edu.cn

中图分类号: X703

收稿日期: 2019-10-25

刊出日期: 2020-02-25

Preparation of Iron-carbon Micro-electrolytic Filler and Its Application for Degradation of Xanthate

School of Chemical Engineering Zhengzhou University, Zhengzhou 450001, China

More Information

Corresponding author: HAN Guihong, hanguihong@zzu.edu.cn

Received Date: 25 October 2019

Publish Date: 25 February 2020

摘要

摘要:
微电解是一种有效、廉价、绿色的工业废水预处理技术。本研究以铁、碳、粘结剂、造孔剂为原料优化设计制备出了微电解填料，并考察了其用于降解去除异丁基黄药的效果，重点研究了反应时间、填料用量和模拟废水初始pH值对微电解降解异丁基黄药的影响，并用GC-MS测定异丁基黄药降解后产物。结果表明，填料最佳制备条件为：m（Fe）/m（C）=1 GA6FA 1、粘结剂含量为20%、造孔剂含量为3%、煅烧温度为900 ℃、煅烧时间为2.5 h。微电解降解异丁基黄药最佳条件为：模拟废水初始pH=7、反应时间为90 min、填料用量为500 g/L，在此条件下溶液中异丁基黄药、COD、和TOC最终降解率分别为89.91%、79.91%、和35.87%。微电解降解异丁基黄药的最终产物是CO₂、H₂O和SO₄^2-。微电解可以用于净化降解选矿废水残留药剂。
- 微电解 /
- 填料 /
- 异丁基黄药 /
- 降解 /
- 废水
Abstract:
Micro-electrolysis is an effective, inexpensive, green industrial wastewater pretreatment technology. In this study, micro-electrolytic fillers were prepared by using iron, carbon, binder and pore-forming agent as raw materials, and the effects of degrading and removing isobutyl xanthate were investigated. The reaction time, filler amount, and the effect of initial pH of simulated wastewater were mainly studied on the micro-electrolysis degradation of isobutyl xanthate, the product after degradation of isobutyl xanthate were determined by GC-MS. The results show that the optimum preparation conditions of the filler are: m(Fe)/m(C)=1 GA6FA 1, binder content 20%, pore former content 3%, calcination temperature 900 ℃ and calcination time 2.5 h. The optimum conditions for micro-electrolysis degradation of isobutyl xanthate are: simulated wastewater initial pH = 7, reaction time is 90 min, and the amount of filler is 500 g/L. Under these conditions, the final degradation rates of isobutyl xanthate, COD, and TOC were 89.91%, 79.91%, and 35.87%, respectively. The final products of micro-electrolytic decomposition of isobutyl xanthate are CO₂, H₂O and SO₄^2-. Micro-electrolysis can be used to purify and remove residual xanthate in beneficiation wastewater.
- micro-electrolysis /
- filler /
- isobutyl xanthate /
- degradation /
- wastewater

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图 1 试验流程示意图

Figure 1.

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图 2 m(Fe)/m(C)对异丁基黄药降解率的影响

Figure 2.

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图 3 煅烧温度、煅烧时间对异丁基黄药降解效果的影响

Figure 3.

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图 4 煅烧温度、煅烧时间对填料抗压强度的影响

Figure 4.

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图 5 粘结剂含量对填料抗压强度及异丁基黄药降解率的影响

Figure 5.

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图 6 造孔剂含量对填料吸水率及异丁基黄药降解率的影响

Figure 6.

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图 7 填料循环次数对异丁基黄药降解的影响

Figure 7.

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图 8 不同煅烧温度下铁碳微电解填料XRD图

Figure 8.

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图 9 填料反应前后扫描电镜图(放大倍数为500倍)：(a)反应前表面，(b)反应前截面，(c)反应后表面，(d)反应后截面

Figure 9.

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图 10 反应时间对异丁基黄药、COD降解效果的影响

Figure 10.

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图 11 反应过程中动力学拟合

Figure 11.

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图 12 填料用量对异丁基黄药降解效果的影响

Figure 12.

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图 13 pH值对异丁基黄药降解效果的影响

Figure 13.

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图 14 异丁基黄药降解前后的GC-MS总离子图谱

Figure 14.

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图 15 异丁基黄药可能降解路径推测(R为异丁基)

Figure 15.

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表 1 填料的宏观物理参数

Table 1. Macroscopic physical parameters of filler

Name	Particle size (mm)	Apparent density (g/cm³)	Bulk density (g/cm³)	Voidage (%)	Water absorption (%)	Wear rate (%)	Compressive strength (N)
Micro-electrolytic filler	5~8	2.658	1.008	62.08	18.75	4.8	64.49

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表 2 微电解降解异丁基黄药产物分析

Table 2. Analysis of micro-electrolytic degradation products of isobutyl xanthate

Serial number	Product	Molecular formula	Structural formula
1	Isobutane	C₄H₁₀
2	Isobutanol	C₄H₁₀O
3	Diisobutyl sulfide	C₈H₁₈S
4	Carbon disulfide	CS₂
5	Isovaleric acid	C₅H₁₀O₂
6	2, 4-dimethylpentane	C₇H₁₆
7	Isobutyric acid	C₄H₇O₂
8	3-methylthiobutyric acid-S (1-methylethyl) ester	C₈H₁₆OS
9	Xanthanate	C₅H₁₀S₂
10	Diisobutyl carbonate	C₉H₁₈O₃

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