Advanced Materials and Technologies for Fuel Cells

doi:10.3390/books978-3-0365-0539-8

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Due to the low pH and high conductivity values, the real chemical extract was pretreated before it was used as catholyte in the MFC, in order for the chemical extract to be safely introduced in the cathode without affecting the PEM or the bioanode [21]. Speci cally, an alkaline pretreatment preceded the treatment of the chemical extract in the MFC, with the addition 2% v/v NaOH (32% w/v -pH = 12, conductivity = 140 mS/cm) which resulted in pH 0.1 and conductivity 200 mS/cm.…”

Section: The Eol 1st Generation Pv Chemical Extractmentioning

confidence: 99%

“…Before recovery case R4, the EoL PV chemical extract was pretreated as previously described. The alkaline pretreatment and dilution was performed in order to prevent electron losses, reverse ion crossover through the PEM, improve the cell operating stability as well as improve the degree of crystallinity of the recovered valuable Ag [21,29]. High ionic strength extracts can potentially damage the PEM and cause ion crossover from the cathodic compartment towards the anodic compartment.…”

Section: Recovery Of Metals From 1st Generation Eol Pv Panels (R4)mentioning

confidence: 99%

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Silver recovery from chemical extract originating from End-of-Life photovoltaic panels using a Microbial Fuel Cell

Kanellos

Tremouli

Tsakiridis

et al. 2023

Preprint

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The solar energy sector has grown rapidly in the past decades, addressing the issues of energy security and climate change. Many photovoltaic panels that were installed during this technological revolution, have accumulated as waste and even more are nearing their End-of-Life (EoL). Based on circular economy, a new hydrometallurgical process has been proposed for the management of the EoL PVs. This results in a chemical extract containing 0.7 % w/w Ag, along with various other metals. This study investigates the cell power generation and the kinetics of the silver recovery, along with the parasitic removal of other heavy metals, both from synthetic and the real chemical extract in the cathode of a Microbial Fuel Cell (MFC). The results indicated that silver was completely recovered from the synthetic and the real chemical extract, with a rate of ~82 μmol/h and ~32 μmol/h, respectively. The difference is attributed to the simultaneous reduction of other heavy metals in amorphous compounds, hindering the silver reduction kinetics and leading to a gradual electrode passivation. Nevertheless, silver can be 100% retrieved from the chemical extract, with a purity of 68-96% w/w (average 86% w/w at the end of the batch cycle), in crystal (face center cube) structure, containing minor metal impurities.

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Section: The Eol 1st Generation Pv Chemical Extractmentioning

confidence: 99%

Section: Recovery Of Metals From 1st Generation Eol Pv Panels (R4)mentioning

confidence: 99%

Silver recovery from chemical extract originating from End-of-Life photovoltaic panels using a Microbial Fuel Cell

Kanellos

Tremouli

Tsakiridis

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Silver Recovery from End-of-Life Photovoltaic Panels Based on Microbial Fuel Cell Technology

Kanellos

Tremouli

Tsakiridis

et al. 2023

Waste Biomass Valor

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The solar energy sector has grown rapidly in the past decades, addressing the issues of energy security and climate change. Many photovoltaic (PV) panels that were installed during this technological revolution, have accumulated as waste and even more are nearing their End-of-Life (EoL). Based on circular economy, a new hydrometallurgical process has been proposed for the management of the EoL PVs. This results in a chemical extract containing 0.7% w/w Ag, along with various other metals. This study investigates the MFC technology as an alternative method for valuable metal recovery from the chemical extract of PV panels. Moreover, metal recovery from the chemical extract is compared with the individual recoveries obtained using corresponding synthetic solutions. The results indicated that silver was completely recovered from the synthetic and the real chemical extract, with a rate of ~ 82 and ~ 32 μmol/h, respectively. The difference is attributed to the simultaneous reduction of other heavy metals in amorphous compounds, hindering the silver reduction kinetics and leading to a gradual electrode passivation. Nevertheless, silver can be 100% retrieved from the chemical extract, with a purity of 68–96% w/w (average 86% w/w), in crystal (face center cube) structure, containing minor metal impurities. Graphical Abstract

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Advanced Materials and Technologies for Fuel Cells

Abstract: Cover image courtesy of Sabrina Presto.

Cited by 2 publications

References 6 publications

Silver recovery from chemical extract originating from End-of-Life photovoltaic panels using a Microbial Fuel Cell

Silver recovery from chemical extract originating from End-of-Life photovoltaic panels using a Microbial Fuel Cell

Silver Recovery from End-of-Life Photovoltaic Panels Based on Microbial Fuel Cell Technology

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