Potential Biosorbent Derived from Calligonum polygonoides for Removal of Methylene Blue Dye from Aqueous Solution

Table 1

Resonance structure and some important physical properties of MB (3, 7-bis(dimethyl amino)phenothiazine-5-ium chloride) [30].

Mw (g/mol)	Size (nm)	(g/L)		(^°C)
319.85	1.69 × 0.74 × 0.38	43.60	5.58	100–110

Mw molecular weight.
water solubility at 25^°C.
octanol water partition coefficient.
melting point.