Effects of Nonaqueous Phase Liquids Pollution on the Permeability and Microstructure of In-Filed and Laboratory Soaked Contaminated Clay Soils

Table 10

The percentage of pore volume and cumulative surface area of contaminated and uncontaminated samples.

Soil samples	Soil layer	accumulation surface area (m^2/g)	cumulative porosity volume (cm^3/g)	Percentage of pore volume (%)
				Microporosity	transition pores	Mesoporosity	Macro-porosity
				d < 10 nm	10 < d < 100 nm	100 <d  < 1000 nm	d > 1000 nm
Uncontaminated clay	Layer (2)	9.24	0.216	2.36	13.39	47.54	36.71
	Layer (3)	6.05	0.488	0	7.62	40.12	52.26
	Layer (4)	16.00	0.388	2.80	9.96	29.65	57.59
	Layer (5)	12.33	0.382	0.97	14.67	60.84	23.52
The filed contaminated clay of vinyl chloride and CH2ClCHCl2	Layer (2)	14.36	0.352	2.72	10.48	26.48	60.32
	Layer (3)	4.94	0.535	0	3.02	39.61	57.37
	Layer (4)	12.56	0.358	2.15	9.89	32.51	55.45
	Layer (5)	18.81	0.417	2.44	15.40	42.93	39.23
Indoor soaked contaminated clay of TCE	Layer (4)	7.88	0.400	0.46	10.21	29.01	60.32