Using SEM-EDX and ICP-OES to Investigate the Elemental Composition of Green Macroalga Vaucheria sessilis

Table 1

The concentration of elements in the solution before and after bioaccumulation of Zn(II) and Cu(II) ions by Vaucheria sessilis.

Element	Concentration (mg L^−1) of elements in the solution:
	Before	After	Before	After
	Zn(II) ions		Cu(II) ions
	Bioaccumulation* by Vaucheria sessilis
Co	0.0226 ± 0.0056	0.0375 ± 0.0094	<LLD	0.00500 ± 0.00125
Cu	0.0256 ± 0.0064	0.0353 ± 0.0088	14.0 ± 2.1	4.35 ± 0.65
Fe	0.836 ± 0.125	0.253 ± 0.038	0.833 ± 0.125	0.452 ± 0.068
Mn	0.0551 ± 0.0138	0.0325 ± 0.0081	0.0423 ± 0.0105	0.0937 ± 0.0234
Zn	15.6 ± 2.34	1.81 ± 0.27	0.099 ± 0.025	0.381 ± 0.057
Ca	2.71 ± 0.41	5.87 ± 0.88	2.14 ± 0.32	6.72 ± 1.01
Na	3.32 ± 0.50	4.18 ± 0.63	6.62 ± 0.99	7.75 ± 1.16
Ba	0.0151 ± 0.0038	0.0333 ± 0.0083	0.00895 ± 0.00224	0.0696 ± 0.0174
K	90.0 ± 13.5	96.5 ± 14.5	88.4 ± 13.3	97.1 ± 14.6
Al	0.124 ± 0.019	<LLD	0.105 ± 0.016	0.0762 ± 0.0190
Mg	2.11 ± 0.32	3.16 ± 0.47	2.11 ± 0.32	4.20 ± 0.63

<LLD: below low limit of detection (Co < 0.0009 mg L⁻¹; Al < 0.0234 mg L⁻¹).
* 12.5 mg L⁻¹; pH of the initial solution 7.0; 0.14 g L⁻¹; 23°C, bioaccumulation time: 2 weeks.