高级搜索

废弃印刷线路板中铜的两步浸出工艺优化

,  ,  ,  ,  , 

downloadPDF

上一篇

下一篇

王莉莉, 孙秀云, 李桥, 孙晓蕾, 李毅, 王连军. 废弃印刷线路板中铜的两步浸出工艺优化[J]. 环境工程学报, 2018, 12(1): 250-258. doi: 10.12030/j.cjee.201705115
引用本文: 王莉莉, 孙秀云, 李桥, 孙晓蕾, 李毅, 王连军. 废弃印刷线路板中铜的两步浸出工艺优化[J]. 环境工程学报, 2018, 12(1): 250-258. doi: 10.12030/j.cjee.201705115
shu
WANG Lili, SUN Xiuyun, LI Qiao, SUN Xiaolei, LI Yi, WANG Lianjun. Optimization of two-step leaching of copper from waste printed circuit board[J]. Chinese Journal of Environmental Engineering, 2018, 12(1): 250-258. doi: 10.12030/j.cjee.201705115
Citation: WANG Lili, SUN Xiuyun, LI Qiao, SUN Xiaolei, LI Yi, WANG Lianjun. Optimization of two-step leaching of copper from waste printed circuit board[J]. Chinese Journal of Environmental Engineering, 2018, 12(1): 250-258. doi: 10.12030/j.cjee.201705115
shu

废弃印刷线路板中铜的两步浸出工艺优化

  • 1.

    南京理工大学环境与生物工程学院,南京 210094

  • 2.

    江苏省化工污染控制与资源化重点实验室,南京 210094

  • 基金项目:

    江苏省自然科学基金资助项目(BK20161497)

    中央高校基本科研业务费专项(30917011308)

Optimization of two-step leaching of copper from waste printed circuit board

  • 1.

    School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

  • 2.

    Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, Nanjing 210094, China

  • Fund Project:

  • 摘要: 以化学-生物两步浸出工艺回收废弃印刷线路板(WPCBs)中的金属,利用钢铁酸洗废水作为化学浸出的浸出剂,后续生物浸出则采用嗜酸性氧化亚铁硫杆菌作为浸出微生物,探究了WPCBs中铜浸出率和酸洗废水中铁去除率的影响因素。利用响应面分析法对铜浸出的条件进行优化,得出转速553.43 r·min-1、温度42.57 ℃、投加量20.23 g·L-1、颗粒尺寸1.80 mm为最佳浸出条件,此条件下铜浸出率预测值为100.08%。铜化学浸出动力学模型符合湿法冶金中液固相反应的“收缩核动力学模型”,相关系数可以达到0.98以上,过程主要受残留固体膜层的控制。生物浸出实验表明,WPCBs投加量对嗜酸性氧化亚铁硫杆菌毒性影响较大,抑制作用较强,对铜浸出和铁去除均有不利影响,实验表明最适的投加量为 60 g·L-1。
    Abstract: Metals were recovered from waste printed circuit boards (WPCBs) by chemical-biological two-step leaching process. Steel pickling wastewater was used as a leaching agent for chemical leaching and subsequent bioleaching was performed using the Acidithiobacillus ferrooxidans as leaching microorganisms. The influencing factors of copper leaching rate in WPCBs and iron removal rate in steel pickling wastewater were investigated. The response surface methodology was employed to optimize the leaching parameters. The optimum leaching conditions were determined as rotating speed of 553.43 r·min-1, temperature of 42.57 ℃, dosage of 20.23 g·L-1, particle size of 1.80 mm, and the leaching rate of copper was found to be 100.08%. The kinetic model of copper leaching conformed to the “shrinkage kinetics model” of liquid-solid reaction in hydrometallurgy, and the correlation coefficient can reach above 0.98. Bioleaching experiments showed that the dosage of WPCBs had a great effect on the toxicity of Acidithiobacillus ferrooxidans and had a strong inhibitory effect on copper leaching and iron removal. The experiment showed that the optimum dosage was 60 g·L-1.
  • 加载中
  • [1] 杨远坤, 谌书, 陈梦君, 等.氧化亚铁硫杆菌浸提废旧线路板铜的浸出率与时间的关系[J].环境工程学报,2013,7(6):2322-2326
    [2] PETTER P M H, VEIT H M, BERNARDES A M.Evaluation of gold and silver leaching from printed circuit board of cell phones[J].Waste Management, 2014,4:475-482
    [3] CHEN M J, ZHANG S, HUANG J X, et al.Lead during the leaching process of copper from waste printed circuit boards by five typical ionic liquid acids[J].Journal of Cleaner Production,2015,95:142-147
    [4] 刘志峰, 胡张喜, 李辉, 等.印刷线路板回收工艺与方法研究[J].中国资源综合利用,2007,5(2):17-21
    [5] PRADHAN J K, KUMAR S.Metals bioleaching from electronic waste by Chromobacterium violaceum and Pseudomonads sp[J].Waste Management and Research, 2012,0(11):1151-1159
    [6] 吴思芬, 李登新, 姜佩华.微生物浸取废弃印刷线路板粉末中的铜[J].环境污染与防治,2008,0(11):27-34
    [7] FLVIA P C S, MNICA M J C, MARCOS P K C, et al.Printed circuit board recycling: Physical processing and copper extraction by selective leaching[J].Waste Management,2015,6:503-510
    [8] BIRLOAGA I, COMAN V, KOPACEK B, et al.An advanced study on the hydrometallurgical processing of waste computer printed circuit boards to extract their valuable content of metals[J].Waste Management,2014,34(12):2581-2586
    [9] 张婧,邹平,孙珮石,等.化学-生物联合浸出次生硫化铜精矿的研究[J].矿冶工程,2015,35(6):122-127
    [10] ARSHADI M, MOUSAVI S M.Enhancement of simultaneous gold and copper extraction from computer printed circuit boards using Bacillus megaterium[J].Bioresource Technology,2015,5:315-324
    [11] LAMBERT F, GAYDARDZHIEV S, LONARD G, et al.Copper leaching from waste electric cables by biohydrometallurgy[J].Minerals Engineering,2015,76:38-46
    [12] ILYAS S, ANWAR M A, NIAZI S B, et al.Bioleaching of metals from electronic scrap by moderately thermophilic acidophilic bacteria[J].Hydrometallurgy,2007,88(1):180-188
    [13] 周培国, 郑正, 彭晓成, 等.氧化亚铁硫杆菌浸出线路板中铜的研究[J].环境污染治理技术与设备,2006,7(12):126-128
    [14] ARSHADI M, MOUSAVI S M.Simultaneous recovery of Ni and Cu from computer printed circuit boards using bioleaching:Statistical evaluation and optimization[J].Bioresource Technology, 2014,4:233-242
    [15] 陈颖, 杨朝晖, 李小江, 等.茶树菇废菌体对水中Cr(Ⅵ)吸附的响应面优化及机理研究[J].环境科学学报,2010,0(8):1593-1600
    [16] NICHOLAS R B, CARL C N, DONALD R L.Recovery of scrap iron metal value using biogenerated ferric iron[J].Biotechnology and Bioengineering,2006,3(6):1089-1094
    [17] 郭勤,韩文艳,李江, 等.氯离子对氧化亚铁硫杆菌和氧化亚铁钩端微螺菌活性的影响[J].有色金属(冶炼部分),2015(1):42-45
    [18] REZVANI F, HASHEMI-NAJAFABADI S, MOUSAVI S M, et al.Optimization of the removal of phenol by soybean seed coats using response surface methodology[J].Water Science & Technology,2012,6(10):2229-2236
    [19] DAOUD J, KARAMANEV D.Formation of jarosite during Fe2+ oxidation by Acidithiobacillus ferrooxidans[J].Minerals Engineering,2006,9(9):960-967
    [20] MISHRA D, AHN J G, KIM D J, et al.Dissolution kinetics of spent petroleum catalyst using sulfur oxidizing acidophilic microorganisms[J].Journal of Hazardous Materials,2009,7:1231-1236
    [21] CHEN S, YANG Y, LIU C, et al.Column bioleaching copper and its kinetics of waste printed circuit boards (WPCBs) by Acidithiobacillus ferrooxidans[J].Chemosphere,2015,1:162-168
  • 加载中
WeChat 点击查看大图
计量
  • 文章访问数:  1757
  • HTML全文浏览数:  1475
  • PDF下载数:  258
  • 施引文献:  0
出版历程
  • 刊出日期:  2018-01-14

废弃印刷线路板中铜的两步浸出工艺优化

  • 1. 南京理工大学环境与生物工程学院,南京 210094
  • 2. 江苏省化工污染控制与资源化重点实验室,南京 210094
基金项目:

江苏省自然科学基金资助项目(BK20161497)

中央高校基本科研业务费专项(30917011308)

摘要: 以化学-生物两步浸出工艺回收废弃印刷线路板(WPCBs)中的金属,利用钢铁酸洗废水作为化学浸出的浸出剂,后续生物浸出则采用嗜酸性氧化亚铁硫杆菌作为浸出微生物,探究了WPCBs中铜浸出率和酸洗废水中铁去除率的影响因素。利用响应面分析法对铜浸出的条件进行优化,得出转速553.43 r·min-1、温度42.57 ℃、投加量20.23 g·L-1、颗粒尺寸1.80 mm为最佳浸出条件,此条件下铜浸出率预测值为100.08%。铜化学浸出动力学模型符合湿法冶金中液固相反应的“收缩核动力学模型”,相关系数可以达到0.98以上,过程主要受残留固体膜层的控制。生物浸出实验表明,WPCBs投加量对嗜酸性氧化亚铁硫杆菌毒性影响较大,抑制作用较强,对铜浸出和铁去除均有不利影响,实验表明最适的投加量为 60 g·L-1。

English Abstract

    全文HTML

参考文献 (21)

目录

/

返回文章
返回

Copyright © 2019 中国科学院生态环境研究中心