Recovery of Silver from Nitrate Leaching Solution of Silicon Solar Cells

Sung-Yong Cho; Tae-Young Kim; Pan-Pan Sun

doi:10.7844/kirr.2021.30.2.39

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2021 Vol.30, Issue 2 Preview Page Next Page

Research Paper

Recovery of Silver from Nitrate Leaching Solution of Silicon Solar Cells 실리콘 태양전지 질산침출액에서 LIX63를 이용한 은(Ag) 회수

30 April 2021. pp. 39-45

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Abstract

Spent photovoltaic module is one of the important resource of silver, while related research concerning silver recovery remains limited. In our previous research, HNO₃ was utilized to dissolve Ag(I) and Al(III) from the spent silicon solar cells. In order to recover Ag(I) from the leachate of a silicon solar cell, the present study made use of a nitrate solution containing Ag(I) and Al(III), which was subjected to a solvent extraction process with 5,8-diethyl-7-hydroxydodecan-6-oxime (LIX63). Ag(I) was selectively extracted with LIX63 over Al(III) from the nitrate leach solution. Subsequently, quantitative stripping of Ag(I) from the loaded LIX63 was performed by using 20% ammonia water. The McCabe–Thiele plots for the extraction and stripping isotherms of Ag(I) were also constructed. Extraction and stripping simulation tests confirmed an Ag(I) extraction and stripping efficiency of >99.99% and 98.9%, respectively with high purity Ag (99.998%) and Al (99.99%) solution. A process flow sheet for Ag(I) recovery from the nitrate leach solution was proposed.

Keywords

silver

aluminum

stripping

ammonia water

silicon solar cell

폐 태양광전지 처리과정에서 은은 실리콘 및 알루미늄을 회수 위해 제거 하거나 처리하지않고 버리고있는 현실이다. 경제적 및 환경보호 측면에 폐 태양광전지부터 은의 회수 중요하다고 판단함. 선행연구에서 1 mol/L 질산, 반응온도 70도, 반응시간 2h로 폐 태양광전지부터 Ag, Al을 침출 하었다. 이 침출액으로부터 은을 회수하기 위해 추출제 LIX63 및 탈거제 암모니아수 이용하였다. 추출 및 탈거 효율에 영향 미치는 조건: 침출액 pH, 금속이온 농도, 추출제의 농도, A/O ratio(수상 및 유기상 부피비율), 탈거제 농도 및 탁거과정에서 A/O ratio등을 변화시켜 조차하였다. McCabe–Thiele plots로부터 Ag(I)의 추출 및 탈거에 대한 이론 단수를 구하였으며, 향류 다단 모의 추출 시험을 통해 Ag(I)의 추출과 탈거에 대한 효율이 각각 >99.99%, 98.9% 이었다. Ag(I)와 Al(III)의 순도는 각각 99.998% 와 99.99%이었으며, 질산 침출액으로부터 Ag(I)및 Al(III)을 회수하기 위한 공정도를 제안하였다.

키워드

은

알루미늄

탈거

암모니아수

실리콘 태양전지

References

AbdEl-Ghaaffar, M.A., Abdel-Wahab, Z.H., Elwakeel, K.Z., 2009 : Extraction and separation studies of silver (I) and copper (II) from their aqueous solution using chemically modified melamine resins, Hydrometallurgy, 96, pp.27-34. 10.1016/j.hydromet.2008.07.008

Song, X., Gunawan, P., Jiang, R., et al., 2011 : Surface activated carbon nanospheres for fast adsorption of silver ions from aqueous solutions, J. Hazard. Mater., 194, pp. 162-168. 10.1016/j.jhazmat.2011.07.07621862215

Fornalczyk, A., 2012 : Industrial catalysts as a source of valuable metals, J. Achievements Mater. Manuf. Eng., 55, pp.864-869.

Sari, A., Tüzen, M., 2013 : Adsorption of silver from aqueous solution onto raw vermiculite and manganese oxide-modified vermiculite, Microporous Mesoporous Mater, 170, pp.155-163. 10.1016/j.micromeso.2012.12.004

Kuczyńska-Łażewska, A., Klugmann-Radziemska, E., Sobczak, Z., et al., 2018 : Recovery of silver metallization from damaged silicon cells, Sol. Energy Mater. Sol. Cells, 176, pp.190-195. 10.1016/j.solmat.2017.12.004

Tao, J., Yu, S., 2015 : Review on feasible recycling pathways and technologies of solar photovoltaic modules, Solar Energy Mater. Solar Cells, 141, pp.108-124. 10.1016/j.solmat.2015.05.005

Dias, P., Javimczik, S., Benevit, M., et al., 2016 : Recycling WEEE: extraction and concentration of silver from waste crystalline silicon photovoltaic modules, Waste Manag, 57, pp.220-225. 10.1016/j.wasman.2016.03.01626980485

Klugmann-Radziemska, E., Ostrowski, P., Drabczyk, K., et al., 2010 : Experimental validation of crystalline silicon solar cells recycling by thermal and chemical methods, Sol. Energy Mater. Sol. Cells, 94, pp.2275-2282. 10.1016/j.solmat.2010.07.025

Kang, S., Yoo, S., Lee, J., et al., 2012 : Experimental investigations for recycling of silicon and glass from waste photovoltaic modules, Renew. Energy, 47, pp.152-159. 10.1016/j.renene.2012.04.030

Jung, B., Park, J., Seo, D., et al., 2016 : Sustainable system for raw-metal recovery from crystalline silicon solar panels: from noble-metal extraction to lead removal, ACS sustainable Chem. Eng., 4, pp.4079-4083. 10.1021/acssuschemeng.6b00894

Choi, C., Cui, Y., 2012 : Recovery of silver from wastewater coupled with power generation using a microbial fuel cell, Bioresour, Technol, 107, pp.522-525. 10.1016/j.biortech.2011.12.05822217729

Aktas, S., 2010 : Silver recovery from spent silver oxide button cells, Hydrometallurgy, 104, pp.106-111. 10.1016/j.hydromet.2010.05.004

Laki, S., Shamsabadi, A.A., Kargari, A., 2016 : Comparative solvent extraction study of silver(I) by MEHPA and Cyanex 302 as acidic extractants in a new industrial diluent (MIPS), Hydrometallurgy 160, pp.38-46. 10.1016/j.hydromet.2015.12.002

Tang, B., Yu, G., Fang, J., et al., 2010 : Recovery of high-purity silver directly from dilute effluents by an emulsion liquid membrane-crystallization process, J. Hazard. Mater, 177, pp.377-383. 10.1016/j.jhazmat.2009.12.04220045246

Miller, J.D., Wan, R.Y., Parga, J.R., 1990 : Characterization and electrochemical analysis of gold cementation from alkaline cyanide solution by suspended zinc particles, Hydrometallurgy, 24, pp.373-392. 10.1016/0304-386X(90)90100-G

Sole, K.C., Hiskey, J.B., 1995 : Solvent extraction of copper by Cyanex 272, Cyanex 302 and Cyanex 301, Hydrometallurgy, 37, pp.129-147. 10.1016/0304-386X(94)00023-V

Sun, P.P., Min, B.J., Kim, S.T., et al., 2017 : Separation of silver (I) and zinc (II) from nitrate solutions by solvent extraction with LIX63, Mater. Trans, 58, pp.287-290. 10.2320/matertrans.M2016316

Song, H.I., Min, B.J., Cho, S.Y., et al., 2015 : Solvent extraction of silver from nitric acid solution with 5,8- Diethyl-7-hydroxy-dodecan-6-oxime, J. Chem. Eng. of Jpn, 48, pp.829-833. 10.1252/jcej.15we028

Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 30
No :2
Pages :39-45
Received Date : 2021-02-16
Revised Date : 2021-03-26
Accepted Date : 2021-03-29
DOI :https://doi.org/10.7844/kirr.2021.30.2.39

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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