00625175

Component

http://onlinepubs.trb.org...trr/1992/1345/1345-011.pdf

https://scholar.google.co...sieh&publication_year=1992

The leachate in landfill sites carries out highly concentrated inorganic and organic pollutants. Such pollutants can be intercepted by the adsorption of landfill soil and will proceed with a long-term stabilization-degradation reaction in the soil. Moreover, the possibility of groundwater pollution due to the leachate from landfill can be reduced through the intercepted adsorption by the soil. Simulated adsorption batch experiments were carried out in this study to investigate the adsorption removal of heavy metals by soils. The tested soils included red loam from the Taichung sanitary landfill site and six alluvial soils located over the most widespread area in Taiwan. The results indicated the following trend for the ability of heavy metal adsorption removal by such tested soils: Hsinying soil > Chunghsin Village soil > Chung Hsing University soil about = to Hsuehchia soil > Taichung sanitary landfill soil > Mashan soil > Tunghsiao soil. The adsorption removal of heavy metals followed Pb about = to Cu > Ni about = to Cd about = to Zn. The adsorption removal by red loam increased with Cd concentration; however, part of the Cd removal in the high-pH region for high Cd concentration was due to precipitation. Thus, consideration of the speciation distribution was necessary to determine the maximum probable precipitated amount and the minimum probable adsorbed amount. In addition, in the presence of organic ligand [ethylenediamine tetraacetic acid (EDTA)], the adsorption effect of Cd by red loam was suppressed because of the complexation with EDTA, and the adsorption decreased with increasing EDTA concentration.

This paper appears in Transportation Research Record No. 1345, Geoenvironmental and Engineering Properties of Rock, Soil, and Aggregate. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01404972

English

p. 84-91

1992

Transportation Research Record

0309052084

Figures (8) ; References (16) ; Tables (2)

Adsorption; Alluvium; Contaminants; Groundwater; Heavy metals; Landfills; Leachate; Loam; pH value; Pollutants; Prevention; Soils

Contamination

Taiwan

Geotechnology; Highways; Security and Emergencies; I42: Soil Mechanics

TRIS, TRB

Oct 22 1993 12:00AM

• CONSTRUCTION AND PERFORMANCE OF A SHREDDED WASTE TIRE TEST EMBANKMENT
• CORROSION OF STEEL PILES IN SOME WASTE FILLS
• CORROSIVITY OF INDIANA BOTTOM ASH
• EFFECT OF CHLORIDE AND SULFATE CONTAMINATION IN SOILS ON CORROSION OF STEEL AND CONCRETE
• ENGINEERING PROPERTIES OF PHOSPHOGYPSUM-BASED SLAG AGGREGATE
• EVALUATION OF RECYCLED CONCRETE, OPEN-GRADED AGGREGATE, AND LARGE TOP-SIZE AGGREGATE BASES
• PERMEABILITY AND LEACHING CHARACTERISTICS OF FLY ASH LINER MATERIALS
• PHYSICAL AND ENVIRONMENTAL PROPERTIES OF ASPHALT-AMENDED BOTTOM ASH
• RECYCLED PLASTICS FOR HIGHWAY AGENCIES
• RECYCLING PROJECT: CONCRETE GRINDING RESIDUE
• STABILIZATION OF WATER TREATMENT PLANT SLUDGE FOR POSSIBLE USE AS EMBANKMENT MATERIAL
• USE OF BY-PRODUCT PHOSPHOGYPSUM IN ROAD CONSTRUCTION
• USE OF CEMENT KILN DUST, FLY ASH, AND RECYCLING TECHNIQUE IN LOW-VOLUME ROAD REHABILITATION
• USE OF WASTE MATERIALS IN HIGHWAY CONSTRUCTION: STATE OF THE PRACTICE AND EVALUATION OF THE SELECTED WASTE PRODUCTS