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Treatment of Acid, Cyanide, and Chromium Wastes C. F. Waite Chief Chemist, King-Seeley Corporation Ann Arbor, Michigan The location of the new King-Seeley Plant on the Huron River in the country eight miles west of Ann Arbor at Scio, Michigan, necessitates construction of adequate waste-disposal facilities as an integral part of the plant. There are no waste-disposal services of any kind other than the river. Sportsmen in the area are ultra-sensitive to pollution as a result of the intermittent dumping of oil wastes by a laundry at Dexter two miles west of the King-Seeley Plant. Re¬ peated reprimands from the Stream Control Commission had just been effective in removing this contamination. However, of more importance than the danger to aquatic life is the danger to human life. The city of Ann Arbor takes up to 50 percent of its drinking water from the river about six miles below the King-Seeley Plant. All of this made it necessary to correct and render innocuous all wastes before they entered the river. All sanitary wastes are treated adequately by standard septic-tank and filter-bed treatment. The prob¬ lem was with the industrial wastes, which are separated into the following five classifications: (1) acid and alkali, (2) cyanide, (3) chromium, (4) nickel, and (5) roto-finish wastes. The acid-alkali wastes, consisting of 75,000 gallons per 16-hour working day of waste, with a pH of about 10, posed no serious problem but merely one of neutralization. The cyanide problem was more serious. There are about 25,000 gallons per 16-hour working day of waste containing 12 to 20 ppm of cyanide as KCN. The cyanide wastes are of course extremely poisonous; most authorities agree that any concentration over 0.1 ppm is dan¬ gerous to aquatic life. Many methods have been proposed to destroy cyanide. Four of these were investigated: the acid treatment, ion exchange, electrolysis, and oxidation methods. The acid treatment con¬ sists, of course, of adding an acid (usually sulfuric) and bubbling air through the acidified waste to carry off the hydrogen cyanide which is evolved. Aside from the poisonous character of the hydrogen cyanide 223
Object Description
Purdue Identification Number | ETRIWC194922 |
Title | Treatment of acid, cyanide, and chromium wastes |
Author | Waite, C. F. |
Date of Original | 1949 |
Conference Title | Proceedings of the fifth Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/engext&CISOPTR=10924&REC=14 |
Extent of Original | p. 223-231 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2008-05-18 |
Capture Device | Fujitsu fi-5650c |
Capture Details | ScandAll21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 223 |
Date of Original | 1949 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650c |
Capture Details | ScandAll21 |
Transcript | Treatment of Acid, Cyanide, and Chromium Wastes C. F. Waite Chief Chemist, King-Seeley Corporation Ann Arbor, Michigan The location of the new King-Seeley Plant on the Huron River in the country eight miles west of Ann Arbor at Scio, Michigan, necessitates construction of adequate waste-disposal facilities as an integral part of the plant. There are no waste-disposal services of any kind other than the river. Sportsmen in the area are ultra-sensitive to pollution as a result of the intermittent dumping of oil wastes by a laundry at Dexter two miles west of the King-Seeley Plant. Re¬ peated reprimands from the Stream Control Commission had just been effective in removing this contamination. However, of more importance than the danger to aquatic life is the danger to human life. The city of Ann Arbor takes up to 50 percent of its drinking water from the river about six miles below the King-Seeley Plant. All of this made it necessary to correct and render innocuous all wastes before they entered the river. All sanitary wastes are treated adequately by standard septic-tank and filter-bed treatment. The prob¬ lem was with the industrial wastes, which are separated into the following five classifications: (1) acid and alkali, (2) cyanide, (3) chromium, (4) nickel, and (5) roto-finish wastes. The acid-alkali wastes, consisting of 75,000 gallons per 16-hour working day of waste, with a pH of about 10, posed no serious problem but merely one of neutralization. The cyanide problem was more serious. There are about 25,000 gallons per 16-hour working day of waste containing 12 to 20 ppm of cyanide as KCN. The cyanide wastes are of course extremely poisonous; most authorities agree that any concentration over 0.1 ppm is dan¬ gerous to aquatic life. Many methods have been proposed to destroy cyanide. Four of these were investigated: the acid treatment, ion exchange, electrolysis, and oxidation methods. The acid treatment con¬ sists, of course, of adding an acid (usually sulfuric) and bubbling air through the acidified waste to carry off the hydrogen cyanide which is evolved. Aside from the poisonous character of the hydrogen cyanide 223 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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