A STUDY OF SALT POLLUTION OF SOIL BY HIGHWAY SALTING

HEAVY APPLICATIONS OF SAND-SALT MIXTURES TO HIGHWAYS FOR SNOW AND ICE REMOVAL ARE COMMON IN NEW ENGLAND. THE EFFECTS OF THIS SALT ON THE ENVIRONMENT NEAR THE HIGHWAY WERE STUDIED. THE MAXIMUM CONCENTRATIONS OF SALTS MAY BE FOUND AT THE SOIL SURFACE AND NEAREST THE HIGHWAY. THE SOIL SALINITY PROBLEM IS MINIMAL FOR SIMILAR FIELD CONDITIONS. THERE IS SOME TENDENCY FOR SALTS TO TRAVEL LATERALLY AWAY FROM THE HIGHWAY, BUT THE MOST PREVALENT MOVEMENT IS DOWNWARD INTO THE SOIL. AS INFILTRATION PROCEEDS, THE SALT CONCENTRATION IS MARKEDLY DECREASED FROM THAT AT THE SURFACE. SALT CONCENTRATIONS DECREASE DURING THE SPRING AND SUMMER, REACHING A LOW LEVEL BEFORE SALT APPLICATIONS ARE RESUMED IN THE WINTER. CHLORIDE MEASUREMENTS ARE GENERALLY PROPORTIONAL TO TOTAL SOLUBLE SALTS MEASUREMENTS. SODIUM ION CONCENTRATIONS, HOWEVER, APPEAR TO ESTABLISH A DIFFERENT PATTERN THAN THE TOTAL SALTS.

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 8-21
  • Monograph Title: Environmental considerations in use of deicing chemicals
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00234188
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jan 16 1994 12:00AM