Separation of copper and arsenic in copper smelting dust by Na2S-NaOH leaching assisted with glow discharge plasma

被引：0

作者：

Wang Q. ^{[1
]}

Guo L. ^{[2
]}

Chen S. ^{[1
]}

Xue Y. ^{[1
]}

Du D. ^{[1
]}

机构：

[1] Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan, 430074, Hubei

[2] State Key Laboratory of Biological Geology and Environmental Geology, China University of Geosciences, Wuhan, 430074, Hubei

来源：

Huagong Xuebao/CIESC Journal | 2017年 / 68卷 / 05期

关键词：

Arsenic and copper; Copper smelting dust; Glow discharge plasma; Leaching; Oxidation; Selectivity; Separation;

D O I：

10.11949/j.issn.0438-1157.20161475

中图分类号：

学科分类号：

摘要：

Selective leaching of arsenic and copper in copper smelting dust (referred to as "soot") was investigated by Na2S-NaOH leaching process with assistance of glow discharge plasma. Results showed that glow discharge plasma could enhance alkaline leaching capacity. The corresponding leaching ratios of arsenic and copper were reached to 92.52% and 7.76% at condition of 10 min discharge time, 500 W discharge power, 150 Pa discharge pressure, and 0.9 cm plate spacing. The leaching process reduced arsenic and copper content in soot from 7.11% to 0.45% and from 2.62% to 2.42%, respectively. XPS, XRD, and speciation analysis of heavy metals indicated that glow discharge plasma was able to oxidize As(III) to As(V) and Cu(I) to Cu(II), which As(V) was more easily leached than As(III) under alkaline condition. In conclusion, glow discharge plasma assisted Na2S-NaOH leaching process proves to be an efficient way of removing both arsenic and copper from soot so the soot can be further utilized after toxic content reduction. © All Right Reserved.

引用

页码：1932 / 1939

页数：7

共 32 条

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