Sealing Effect of KAl(SO4)2 Solution on the Corrosion Resistance of Anodized Aluminum Alloy

Dong, Peng; Cheng, Jie

doi:10.1007/s11595-022-2505-3

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“…Moreover, the sharp peaks at 296.99 and 294.1 eV are characteristic of K 2p2/3 and 2p1/2, respectively. The two peaks centered at 170.03 and 167.76 eV are also characteristics of S 2p2/3 and 2p1/2 [ 28 ], respectively (see Figure 4 e,f), suggesting the presence of alunite/K-alum mixture [ 29 ]. In addition to this, as displayed in Figure 4 g, for Si 2p core-level spectrum with two peaks centered at 103.24 and 102.31 eV and O 1s spectra with BEs of 531 and 532.7 eV, which demonstrate that there SiO 2 states, as well as Si−OH, forms on the surface of SiO 2 [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Recovery of Valuable Materials from End-of-Life Photovoltaic Solar Panels

2023

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The disposal of end-of-life (EOL) photovoltaic solar panels has become a relevant environmental issue as they are considered to be a hazardous electronic waste. On the other hand, enormous benefits are achieved from recovering valuable metals and materials from such waste. Eventually, physical and chemical processing will become the most important stages during the recycling process. A physical treatment including crushing, grinding, and screening was achieved, and it was observed that a fine fraction of −0.25 mm had the maximum percentage of the required materials. Moreover, the optimum chemical treatment conditions were adjusted to reach the maximum recovery of silver, aluminum, and silicon. The synthesis of silicon oxide, silver oxide, alunite, and K-Alum from leachant solution was performed through a simple route. The structural and morphological properties of the prepared materials were defined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and field emission scanning electron microscopy (FESEM).

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Section: Resultsmentioning

confidence: 99%