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Glass: Difference between revisions
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== Overview == | == Overview == | ||
Glass is defined as a hard, transparent material, used to make windows, bottles, and other objects<ref>Cambridge Dictionary, 2019. [https://dictionary.cambridge.org/dictionary/english/glass GLASS | meaning in the Cambridge English Dictionary. Cambridge.org.] [online] [Accessed 5 Dec. 2019].</ref>. It is formed from a melt by cooling to rigidity without crystallization and is a usually transparent or translucent material consisting typically of a mixture of silicates<ref>Marriam-Webster, 2019. [https://www.merriam-webster.com/dictionary/glass Definition of GLASS. Merriam-webster.com.] [online] [Accessed 5 Dec. 2019].</ref>. | Glass is defined as 'a hard, transparent material, used to make windows, bottles, and other objects'<ref>Cambridge Dictionary, 2019. [https://dictionary.cambridge.org/dictionary/english/glass GLASS | meaning in the Cambridge English Dictionary. Cambridge.org.] [online] [Accessed 5 Dec. 2019].</ref>. It is formed from a melt by cooling to rigidity without crystallization and is a usually transparent or translucent material consisting typically of a mixture of silicates'<ref>Marriam-Webster, 2019. [https://www.merriam-webster.com/dictionary/glass Definition of GLASS. Merriam-webster.com.] [online] [Accessed 5 Dec. 2019].</ref>. | ||
In the UK, about 50% of glass waste from containers (bottles, jars, etc), this is a figure that has doubled in the last 5 years but is still behind many countries, for example, Switzerland and Finland recycle over 90% of their glass <ref name="foo">Recyclenow, 2019. [https://www.recyclenow.com/recycling-knowledge/how-is-it-recycled/glass How are glass bottles recycled? | Recycle Now.] Recyclenow.com. [online] [Accessed 5 Dec. 2019].</ref>. To be recycled, glass undergoes the following steps after it is collected from kerbside or bottle banks: | In the UK, about 50% of glass waste arises from containers (bottles, jars, etc), this is a figure that has doubled in the last 5 years but is still behind many countries, for example, Switzerland and Finland recycle over 90% of their glass <ref name="foo">Recyclenow, 2019. [https://www.recyclenow.com/recycling-knowledge/how-is-it-recycled/glass How are glass bottles recycled? | Recycle Now.] Recyclenow.com. [online] [Accessed 5 Dec. 2019].</ref>. To be recycled, glass undergoes the following steps after it is collected from kerbside or bottle banks: | ||
*crushing and contaminants removed (mechanised colour sorting is usually undertaken at this stage if required) | *crushing and contaminants removed (mechanised colour sorting is usually undertaken at this stage if required) | ||
*mixing with the raw materials to colour and/or enhance properties as necessary | *mixing with the raw materials to colour and/or enhance properties as necessary | ||
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== Macro Tonnages == | == Macro Tonnages == | ||
The most recent information published by DEFRA <ref>[https://www.gov.uk/government/statistics/digest-of-waste-and-resource-statistics-2018-edition Digest of Waste Resources 2018] reporting data from 2016</ref> <ref>[https://www.gov.uk/government/statistics/uk-waste-data UK Statistics on Waste 2019] updating some of the 2018 Digest with 2017 data</ref>is summarized in the pie chart below, with 1,338 | The most recent information published by DEFRA <ref>[https://www.gov.uk/government/statistics/digest-of-waste-and-resource-statistics-2018-edition Digest of Waste Resources 2018] reporting data from 2016</ref> <ref>[https://www.gov.uk/government/statistics/uk-waste-data UK Statistics on Waste 2019] updating some of the 2018 Digest with 2017 data</ref>is summarized in the pie chart below, with 1,338,153 tonnes of glass waste generated in the UK in 2016 and is part of the broader tonnage summarized in [[UK Waste Tonnage]]: | ||
[[File:Glass Waste Pie Chart.png|frame|center|Glass Waste - Tonnage Reported as Generated by DEFRA in 2016]] | [[File:Glass Waste Pie Chart.png|frame|center|Glass Waste - Tonnage Reported as Generated by DEFRA in 2016]] | ||
== Brown Glass == | == Brown Glass == | ||