Table 1.

Characterizations of multi-walled nanotube (MWCNT)–COOH and Bisphenol A (BPA)/MWCNT–COOH adduct.

TEM	MWCNT–COOH	BPA/MWCNT–COOH
Diameter (nm) inner/outer	~20–30	~20–30
Length distribution (μm)	~0.5–2.0	~0.5–2.0
Zeta potential (mV) in water	−37 ± 1.0	−33.6 ± 0.46
Adsorption (BPA μg/mg MWCNT–COOH)		37 ± 7.5
Desorption/BPA after 24 h		1%