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1. 中国科学院大学化学与化工学院, 北京 100049
2. 中国科学院过程工程研究所多相复杂系统国家重点实验室, 北京 100190
3. 湘潭大学化工学院, 湖南 湘潭 411105
Received:22 July 2019,
Revised:2019-10-05,
Online First:14 August 2020,
Published:05 February 2020
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张霄玲, 于凤芹, 皇甫林, 王超, 李长明, 高士秋, 余剑. Fe-Zn基废脱硫剂制备铁碳材料及其对废水微电解性能[J]. 化工学报, 2020, 71(2): 788-798
ZHANG Xiaoling, YU Fengqin, HUANGFU Lin, WANG Chao, LI Changming, GAO Shiqiu, YU Jian. Utilization of Fe-Zn-based waste desulfurizer to produce Fe-C materials for removing COD from waste water[J]. CIESC Journal, 2020, 71(2): 788-798
张霄玲, 于凤芹, 皇甫林, 王超, 李长明, 高士秋, 余剑. Fe-Zn基废脱硫剂制备铁碳材料及其对废水微电解性能[J]. 化工学报, 2020, 71(2): 788-798 DOI: 10.11949/0438-1157.20190832.
ZHANG Xiaoling, YU Fengqin, HUANGFU Lin, WANG Chao, LI Changming, GAO Shiqiu, YU Jian. Utilization of Fe-Zn-based waste desulfurizer to produce Fe-C materials for removing COD from waste water[J]. CIESC Journal, 2020, 71(2): 788-798 DOI: 10.11949/0438-1157.20190832.
以Fe-Zn基废脱硫剂、煤、Na
2
CO
3
为原料进行高温炭热还原反应,制备了铁碳材料,实现了Zn和S的分离,有望能实现废脱硫剂的综合利用。考察不同工艺条件(配比,温度,时间)对铁碳材料品质,Zn单质分离效率和Na
2
S的收率影响。结果表明: 反应温度≥900℃,煤∶废脱硫剂≥1,Na
2
CO
3
∶废脱硫剂≥1.5,反应时长≥2 h,Zn、S的分离回收效率可达到95%以上。且900℃制备的铁碳材料比表面高达193.6 m
2
/g,介孔孔体积为0.028 cm
3
/g,炭均匀附着于铁骨架。微电解-芬顿联用降解有机废水实验表明:仅微电解或微电解-芬顿联用(H
2
O
2
=COD=1500 mg/L)时,自制铁碳材料的稳定化学需氧量(COD)去除效率(41.78%、73.56%)都高于商业铁碳(8.43%、48.43%)。本文实验结果表明废脱硫剂与煤和碳酸钠混烧可实现废脱硫剂中Zn与S的分离回收,成功获得了比表面高、去除COD性能好的铁碳材料。
The Fe-Zn-based waste desulfurizer
coal and Na
2
CO
3
were used as raw materials to carry out high-temperature carbon thermal reduction reaction
and iron-carbon materials were prepared to realize the separation of Zn and S. It is
expected to realize the comprehensive utilization of waste desulfurizer. The effect of different preparation parameters (
e
.
g
.
ratios
temperature
time) were investigated to improve the removal efficiency of Zn/S and obtain high-quality Fe-C materials. The best results can be achieved with separation efficiency of Zn and S above 95% with the ratio of 1/1/1.5 for coal/waste desulfurizer/Na
2
CO
3
at 900℃ for 2 h. Moreover
the specific surface area of the prepared Fe-C material can reach as high as 193.6 m
2
/g with the mesoporous volume of 0.028 cm
3
/g. In addition
the micro-electrolysis-Fenton test showed the removal efficiency of COD for the as-prepared Fe-C material are 41.78% and 73.56% without/with H
2
O
2
(H
2
O
2
=COD=1500 mg/L)
respectively
which is much better than commercial Fe-C material with the removal efficiency of 8.43% and 48.43% on the same condition. These results demonstrate the heat treatment process of waste desulfurizer with Buliangou-coal and Na
2
CO
3
may be an effective way for its resource utilization to separate Zn and S as well as produce Fe-C material.
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