Adsorption Science & Technology

Research Article

Adsorption of Heavy Metals on Bentonitic Soil for Use in Landfill Liners

Table 3

Methods for characterization of the investigated soil.
CharacteristicMethod
Grain size distributionASTM D7928 and ASTM D6913
Specific gravity of solids, GsASTM D854
Liquid limit, wLASTM D4318
Plastic limit, wPASTM D4318
USCS classificationASTM D2487
Optimum water content, wopt (proctor standard energy)ASTM D698
Maximum dry unit weight (proctor standard energy)ASTM D698
Mineralogical compositionX-ray diffraction
Hydraulic conductivity at optimum water contentASTM D5856
Chemical compositionX-ray fluorescence
Cation exchange capacityASTM D7503
Organic contentASTM D2974
Electric conductivityEmbrapa [52]
pH in water and in KClEmbrapa [52]
Unified Soil Classification System.