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I~egus~a <br />Corporation <br /> <br />-3- <br />detoxification unit®, where low capital costs and quick <br />etert-up era eacential requirements. <br />Hydrogen peroxide is capable of oxidising both Pree cyanide <br />and weekly-booed cOalpSax CyaAillaA. This includes the <br />following species, wF~ich ere nor~pelly manaured aa~ •Mank ncid <br />dissocinbla or "easily-liberatnbie^ cyanide by the standar8 <br />analytical methods: <br />CSY', liQf, Cd(CST)••`, Za(Qf)•'' Cu(CN)•', Cu(Ctt)•", Cu(CN)•'- <br />In contrast, the lollawiaq epocioa are too stable to be vxidixed <br />by H,O.: <br />Au(CN). , Fo(CN). ", Fo(CIP).•' and Co(Ch)••-. <br />f'errocy~rside Sa not oxidised to Serricyanide by H.Q in <br />alkaline Qolutioa, thus pormittiag its subwqueat r~moval by <br />precipitation with, £or example, copper ions. <br />3. Objective <br />The purpose of this teatwork was to treat a pond so~utioa <br />semp o to achieve a total cyYanide level below 4.4 p and a <br />peek acid dissociable cyanide level below 3.8 ppm. <br />a. Sample Investiontion <br />a.i sample Description: <br />Total Cyanide 178.4 ppm <br />Meek Acid Diasaciable Cyanide (A6TM) 160.7' ppn <br />Copper (AA9) 160.a ppm <br />Iron (nAS) O.1L ppm <br />zinc (nas> <o.os ppm <br />pH 8.5 <br />a.2 Semple Treatment <br />The teats shown in the folloainp table were conducted in <br />agitated beakers. Past experience hie shown that this la <br />representative oP what occurs in the pond. <br />