Release: ESIA Recommendation Paper Addressing uncertain antimony
Given that glass constitutes a substantial portion of PV module weight, recycling glass proves environmentally beneficial by reducing CO 2 emissions and conserving energy.
World Health Organization (WHO): A limit of 5 ppb. California Environmental Protection Agency (CalEPA): A public health goal of 1 ppb for Antimony. Proportion of Antimony in solar glass is typically 0.2% to 0.3% (2 to 3 million ppb). Each PV module has a front glass weighing about 16 kg and thus an Antimony content of 32 to 48 grams.
Antimony oxide is a conditional glass former and simple binary SiO2-Sb2O3[22, 23], B2O3-Sb2O3[24, 25] and P2O5-Sb2O3glasses, and more complex glasses [11, 13, , , , , ], have all been studied to gain new and fundamental composition-structure-property understanding.
To address these challenges, the ESIA Recommendation paper suggests that the European Union should consider mandating PV module manufacturers under the upcoming Ecodesign regulations to disclose the composition and manufacturing process of solar glass, including additives like antimony compounds.
Borosil has been able to successfully remove the Antimony from Solar glass. Institut fur Solartechnik SPF, SWITZERLAND, widely considered a GOLD STANDARD for testing and certification of solar glass publishes on its website, test results of solar glass from some of the top solar glass manufacturers in the world.
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