Characterization of Environmental Nano- and Macrocolloid Particles Extracted from Selected Soils and Biosolids

Table 2

Mineralogical compositions of nano- and macrocolloids.

Properties	Colloids
	Smectitic		Mixed		Kaolinitic		Biosolid
Size class	Macro	Nano	Macro	Nano	Macro	Nano	Macro	Nano
Kaolinite (%)^‡	29	30	42	46	52	55	NA^§	NA^§
Goethite (%)^‡	7	9	5	7	12	15	NA^§	NA^§
Gibbsite (%)^‡	0	0	0	0	5	6	NA^§	NA^§
Quartz (%)^‡	6	4	5	3	4	2	NA^§	NA^§
Mica (%)^‡	10	6	31	30	3	3	NA^§	NA^§
Smectite (%)^‡	48	51	0	0	0	0	NA^§	NA^§
MVI^¶ (%)^‡	0	0	7	7	0	0	NA^§	NA^§
HIV^# (%)^‡	0	0	10	7	24	19	NA^§	NA^§

^‡Mineral percentage as determined using X-Ray diffraction and thermogravimetric data (Karathanasis, 2008 [31]).
§NA: not applicable.
¶MVI: mica-vermiculite interstratified.
^#HIV: hydroxy-interlayered vermiculite.