Extraction Techniques for Polycyclic Aromatic Hydrocarbons in Soils

Table 3

Bibliographic compilation of studies on soil moisture.

Extraction technique	Soil moisture (wt. %)	PAHs studied	Effect of increasing moisture on PAH extraction efficiency (+/−/n.d.)(a)	Reference
MAE	Dry, 30	24 PAHs	LMW PAHs: n.d.; HMW PAHs: +	[29]
SFE	0–40	Phenanthrene	−	[44]
MAE	Dry, 20	16 PAHs	n.d.	[45]
MAE	Dry, 18.5	16 PAHs	+	[49]
Soxhlet			n.d.
SFE	<10	Naphthalene	+	[50]
	10–20		−

(a)+: PAH extraction efficiency increased; −: PAH extraction efficiency decreased; n.d.: no significant difference.