Preparation of Fe-Cu-C ternary micro-electrolytic material and removal of benzohydroxamic acid

doi:10.19965/j.cnki.iwt.2022-1324

Abstract

Abstract:

Fe-Cu-C ternary micro-electrolytic material was prepared by carbothermal reduction method with copper slag as raw material to remove benzohydroxamic acid（BHA） from mineral processing wastewater. The experimental results of preparation conditions showed that Fe-Cu-C prepared at 1 100 ℃，40 min and 35% anthracite had the best effect on the removal of BHA. The Fe-Cu-C was characterized by XRD，SEM and EDS. The results showed that the material had a porous structure and was a supported ternary micro-electrolytic material with Fe-Cu-C alloy，Cu-Fe-C alloy，free carbon as the main active component and quartz as the carrier. The experimental results of reaction condition showed that 2.50 g/L Fe-Cu-C could remove more than 86% of 50 mg/L BHA at the solution temperature of 28 ℃ and pH of 4.0-9.0. Pb（NO₃）₂ and Na₂CO₃ have little effect on Fe-Cu-C removal of BHA，while Na₂SiO₃ had certain inhibitory effect.

Key words: copper slag, carbothermal reduction, ternary micro-electrolytic, benzohydroxamic acid

摘要：

以铜渣为原料，采用碳热还原法制备了一种Fe-Cu-C三元微电解材料，用于去除选矿废水中的苯甲羟肟酸（BHA）。制备条件试验结果表明，在焙烧温度为1 100 ℃、焙烧时间40 min、无烟煤用量为35%条件下制备的Fe-Cu-C对BHA的去除效果最好。采用XRD、SEM和EDS对Fe-Cu-C进行表征，结果表明该材料呈多孔结构，是一种以Fe-Cu-C合金、Cu-Fe-C合金、游离碳为主要有效成分和以石英为载体的负载型三元微电解材料。反应条件试验结果表明，在溶液温度为28 ℃条件下，2.50 g/L的Fe-Cu-C对pH为 4.0~9.0的50 mg/L的BHA的去除率达86%以上。Pb（NO₃）₂、Na₂CO₃对Fe-Cu-C去除BHA影响不大，而Na₂SiO₃对其有一定的抑制作用。

关键词: 铜渣, 碳热还原, 三元微电解, 苯甲羟肟酸

CLC Number:

X703

Liangliang ZHU, Jiangan CHEN, Wen YU, Zuozhen TANG. Preparation of Fe-Cu-C ternary micro-electrolytic material and removal of benzohydroxamic acid[J]. Industrial Water Treatment, 2024, 44(2): 118-124.

朱亮亮, 陈江安, 余文, 唐作珍. Fe-Cu-C三元微电解材料的制备及去除苯甲羟肟酸[J]. 工业水处理, 2024, 44(2): 118-124.

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URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2022-1324

https://www.iwt.cn/EN/Y2024/V44/I2/118

Figures/Tables 9

Fig.1 Effect of roasting temperature on removal of BHA by Fe-Cu-C

Fig.2 Effect of roasting time on removal of BHA by Fe-Cu-C

Fig.3 Effect of anthracite consumption on BHA removal by Fe-Cu-C

Fig.4 XRD pattern of Fe-Cu-C prepared under optimal conditions

Fig.5 SEM and EDS of Fe-Cu-C

Table 1 EDS point analysis results

点	C/%	Fe/%	Cu/%	O/%	Al/%	Si/%	Ca/%	物相
1	5.88	88.67	5.44	—	—	—	—	Fe合金
2	8.14	4.96	86.72	0.17	—	—	—	Cu合金
3	—	2.43	0.97	43.95	3.25	48.48	0.92	石英
4	81.61	1.32	—	17.06	—	—	—	游离炭

Fig.6 Effect of Fe-Cu-C dosage on the removal rate of BHA

Fig.7 Effect of initial pH of solution on the removal rate of BHA

Fig.8 Effect of BHA concentration on the removal rate of BHA

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