These bands observed only for DAH-bentonite indicate modification. The band intensities of DAH-bentonite were decreased around at 3524–3435 cm1 (stretching band of –OH groups) and at 1630 cm1 (zeolitic water).
These bands observed only for DAH-bentonite indicate modification.The band intensities of DAH-bentonite were decreasedaround at 3524–3435 cm1 (stretching band of –OH groups) andat 1630 cm1 (zeolitic water).