Liquid purification or separation – Processes – Chromatography
Patent
1992-02-24
1992-08-18
Therkorn, Ernest G.
Liquid purification or separation
Processes
Chromatography
210721, 210722, 210748, 210759, 210763, 210908, 210912, C02F 132, C02F 172
Patent
active
051396793
ABSTRACT:
Process for treating wastewater containing citric acid and triethanolamine nd heavy metals by subjecting the wastewater to treatment with hydrogen peroxide and ultraviolet light (UV) and in the presence of ferrous ion as catalyst, to substantially decompose the citric acid and the triethanolamine. Wastewater generated from ship bilge cleaning and containing up to 10% citric acid or up to 5% triethanolamine, or mixtures thereof, can thus be subjected to UV/H.sub.2 O.sub.2 treatment with ferrous ion in a concentration thereof of about 20 to about 100 ppm, without forming chelates of iron and other heavy metals with citric acid or with triethanolamine, to decompose up to 90% or more of the citric acid and triethanolamine.
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Chen Jau R.
Pan Bingham Y. K.
Yen Teh F.
Kalmbaugh David S.
Sliwka Melvin J.
The United States of America as represented by the Secretary of
Therkorn Ernest G.
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