Mercury removal from produced water
Mercury removal from produced water
(OP)
Folks,
We need to meet mercury levels of 5 ppb (very stringent as learnt) in the produced water to be discharged from our offshore platform. Can you pls advise on how to meet this limit and if there are any good references to go by in your installations? Pls help.
Thanks in advance.
TechV
We need to meet mercury levels of 5 ppb (very stringent as learnt) in the produced water to be discharged from our offshore platform. Can you pls advise on how to meet this limit and if there are any good references to go by in your installations? Pls help.
Thanks in advance.
TechV





RE: Mercury removal from produced water
RE: Mercury removal from produced water
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This is information on a Chelation Resin for Mercury and precious metals removal.
Gary Schreiber, CWS VI
The Purolite Co.
RE: Mercury removal from produced water
If you prefer a more conventional precipitation process, there is an organo-sulfur product called TMT that is capable of precipitating Hg down to extemely low levels. It's made by DeGussa. Here's a data sheet. http:
Dave Wichern
http://www.dedalusenviro.com
Science is a business of empiricism.
RE: Mercury removal from produced water
RE: Mercury removal from produced water
RE: Mercury removal from produced water
http:/
Dirk Willard
RE: Mercury removal from produced water
We use regular TMT15 precipitation PLUS ion exchange for safety
In theory TMT alone would do the job. But you have to be very careful, you may have colloids after the decanter
Also be careful about the Chloride content, it complexes the Hg.
If you have lots of mercury, think also that the resin cannot always be regenerated to full capacity. This is one more reason to remove the bulk of metals by precipitation first
RE: Mercury removal from produced water
Gary gave a good tip on ion exchange. Wether ion exchange is practical or not depends on the factors listed above. Ion exchange will probably not work well if there is any oil in the water.
Sulfide precipitation is another commonly used process for mercury removal:
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Chevron has a paper outlining a treatment approach:
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It looks like Chevron is using thiosulfate. It is believed that the thiosulfate reacts with mercury to form mercury sulfides in a manner similar to that of the sulfide precipitation process. The thiosulfate process will be somewhat more expensive than others.