IGEM:MIT/2007/Red Team: Difference between revisions
From OpenWetWare
Jump to navigationJump to search
(New page: ==Cost Analysis== *US Dept. of the Interior; Bureau of Reclamation Hg and Cd Cost sheet [http://www.usbr.gov/pmts/water/publications/reportpdfs/Hg&Cd.pdf]) |
No edit summary |
||
| Line 2: | Line 2: | ||
*US Dept. of the Interior; Bureau of Reclamation Hg and Cd Cost sheet [http://www.usbr.gov/pmts/water/publications/reportpdfs/Hg&Cd.pdf] | *US Dept. of the Interior; Bureau of Reclamation Hg and Cd Cost sheet [http://www.usbr.gov/pmts/water/publications/reportpdfs/Hg&Cd.pdf] | ||
===Large Scale=== | |||
====Osmosis==== | |||
====Ion Exchange==== | |||
http://www.remco.com/ix.htm | |||
Strong Acid Cation exchanger Works best with Cadmium...not mercury | |||
Chelation for Hg is 1867x stronger than Cd...would require 2 times | |||
====Lime Softening==== | |||
In lime softening, hydrated lime that is, calcium hydroxide, Ca(OH)2is added to water to precipitate calcium carbonate before the water is used. The amount of lime required will depend on hardness levels. The process requires a settlement period and its effectiveness is governed by the pH of the water. Lime softening is a complex process and therefore is usually limited to situations where constant monitoring is available. | |||
===Small Scale=== | |||
====Reverse Osmosis==== | |||
*$200 | |||
*450 gallons | |||
*$.44/gal | |||
*http://www.sears.com/sr/javasr/product.do?BV_SessionID=@@@@1156703190.1184166024@@@@&BV_EngineID=ccdjaddlglfkikecefecemldffidfmm.0&vertical=SEARS&sid=I0093600010003900085&pid=04238156000 | |||
Revision as of 09:27, 12 July 2007
Cost Analysis
- US Dept. of the Interior; Bureau of Reclamation Hg and Cd Cost sheet [1]
Large Scale
Osmosis
Ion Exchange
http://www.remco.com/ix.htm Strong Acid Cation exchanger Works best with Cadmium...not mercury Chelation for Hg is 1867x stronger than Cd...would require 2 times
Lime Softening
In lime softening, hydrated lime that is, calcium hydroxide, Ca(OH)2is added to water to precipitate calcium carbonate before the water is used. The amount of lime required will depend on hardness levels. The process requires a settlement period and its effectiveness is governed by the pH of the water. Lime softening is a complex process and therefore is usually limited to situations where constant monitoring is available.
