TABLE 2.

Properties of model solid phases used in enrichment environments to obtain a range of phenanthrene bioavailabilities

Solid phase	Chemical nature	Particle size (μm)	Avg pore diam (Å)	Surface area (m2 g−1)	Carbon content (%)	Phenanthrene log KD (liters kg−1)	Source
Sand	SiO2	75–600	Nonporous	0.01a	<0.01	<0.01	Fluka Chemical
PMMA	Polymethyl methacrylate	<100	Nonporous	0.2b	∼50	2.30	ICI Acrylics
AMB	Carboxylic acid	330–500	<100	2.2b	∼50	2.99	Supelco
SM7	Acrylic ester	300–1,180	90	450c	∼50	3.47	Bio-Rad
SM2	Divinyl benzene	300–1,180	90	300c	92	4.16	Bio-Rad

^aCalculated geometric surface area. 

^bDry BET-N₂(g) surface area (15). 

^cData provided by Bio-Rad.