| alum |
This is aluminum sulfate, used for "setting" internal rosin size, to impart water resistance to paper; the alum-rosin size system is " acid" sizing, and the alum is what imparts the acid character to the sheet of paper. Alum can also be used as a release agent on the paper machine to prevent wet webs from sticking to turning rolls or as a minor additive for alkaline sizing, imparting no pH change.
출처: www.newpagecorp.com/mpd/home.nsf/Glossary
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| aluminum |
is abundant in rocks and clays, and it can be mobilized from soils by natural weathering. Sources also include effluents from industries that use aluminum in their processing or use alum as a flocculent. Low concentrations are not a concern, but toxicity of aluminum increases if the pH of the water is less than 6.
출처: www3.gov.ab.ca/env/water/SWQ/faqs04.cfm
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| alumina |
The native form of aluminum oxide occurring as corundum or in hydrated forms as a powder or crystalline substance.
출처: www.aquatechnologies.com/info_glossary.htm
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| aluminium |
A metal, number 13 on the Periodic Table
출처: www.learnz.org.nz/steelmaking/glossary/index.php
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| aluminum |
a light-colored non-magnetic metal refined from Bauxite using large amounts of electrical energy. Aluminum has a very low melting point, is an excellent conductor of both heat and electricity, is easily recycled, and is extremely light in weight about half the weight of steel by volume. Typically alloyed with silicon and copper to increase its toughness and raise the melting point, aluminum alloys are effectively used for components that can take advantage of a large cross-sectional area.
출처: www.autocenter.com/about/
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