RE-USE OR DISPOSAL OF CHROMATE-TREATED COOLING WATER

IN CONNECTION WITH POLLUTION CONCERNING STREAMS AND UNDERGROUND BASINS, THE PROBLEM IS PRESENTED OF DISPOSAL OF CHROMATE COMPOUNDS USED BY MANY RAILROADS IN THE COOLING SYSTEMS OF DIESEL LOCOMOTIVES. COMPLETE REMOVAL AND DISPOSAL OF CHROMATE IS COSTLY EVEN WITH THE MOST MODERN DISPOSAL FACILITIES. SOME STATES DO NOT RESTRICT THE TRIVALENT CHROMIUM CONTENT OF STREAMS SO THAT REDUCED CHROMATE COULD BE DUMPED AT THIS STAGE. HOWEVER, WITH EXISTING RESTRICTIONS THE TRIVALENT CHROMIUM CAN BE FURTHER TREATED WITH LIME AND PRECIPITATED AS CHROMIUM HYDROXIDE. THIS INTRODUCES THE PROBLEM OF SLUDGE DISPOSAL. SEVERAL METHODS ARE AVAILABLE FOR THE RECLAMATION OF CHROMATE COOLING WATER FOR RE-USE. A RECENT ION-EXCHANGE PROCESS CAN RECOVER CHROMATE AND PERMIT ITS RE-USE IN CORROSION CONTROL OF COOLING SYSTEMS AT A POTENTIAL SAVINGS OVER PRESENT COSTS.

• Supplemental Notes:
  • Bull 602, PROC VOL 68, PP 130-132
• Authors:
  • Tennill, W A
• Publication Date: 1966-11

Media Info

• Serial:
  • Am Railway Engineering Assoc Bulletin

Subject/Index Terms

• TRT Terms: Calcium oxide; Chromates; Cooling; Diesel engines; Groundwater; Hydroxides; Ion exchange; Prevention; Railroads; Sludge (Deposit); Streams; Utilization; Waste disposal; Water pollution
• Uncontrolled Terms: Disposal
• Old TRIS Terms: Precipitation; Sludge disposal; Stream pollution
• Subject Areas: Highways; Maintenance and Preservation; Railroads; Research; Security and Emergencies;

Filing Info

• Accession Number: 00218194
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 23 1970 12:00AM