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Wash solutions from the production of sulphuric acid contain up to 500 g/l sulphuric acid and 2 to 4 g/l arsenic. The removal of arsenic from this extremely toxic and aggressive waste water is an important problem, for which up to now any technical solution did not exist.
This problem could be solved by using SGS-type 11. Part of its structure is a functional group, which forms arsenic complexes in a strong acidic solution.
A procedure basing on the application of SGS-type 11 was developed. Tests under industrial conditions were successful. The concentration of arsenic can be reduced to less than 4 mg/l. Water is used for the regeneration of SGS-11. Throughputs of 800 - 1000 bed volumes per hour are possible in both sorption and regeneration process.
In the same way
it is possible to remove antimony from strong acid electrolyte solutions.
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Removal of zinc, lead, copper,
cadmium and mercury from waste water - |
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back to: SGS - Polymers -Contents- |
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| Last
Update:
October 2001 |
Design
by
Steffen Bock Weiland and Roland Kühne |
WADI.com |  |