Removal Properties, Mechanisms, and Performance of Methyl Green from Aqueous Solution Using Raw and Purified Sejnane Clay Type

Table 3

Statistic values of the maximum physicochemical parameters of raw and obtained clay by purification and activation of Sejnane clay type in different solution normalities and temperatures.

	pH	CE (mScm^−1)	CaCO3 (%)	CEC (meq 100 g^−1)	SS (m^2·g^−1)
Raw clay	6.3 (5.9–6.5) ± 0.3	0.37 (0.33–0.42) ± 0. 05	4 (3.8–4.5) ± 0.4	26.6 (25.9–27.5) ± 1.5	37. 7 (35.5–40.1) ± 2.4
HCl purification (0.1 N) and activation (0.5 N)	3.6 (3.3–3.9) ± 0.2	3.4 (3.7–4.1) ± 0.3	0	20 (18.9–22.5) ± 1.9	168.5 (162.0–175.2) ± 13.1
H2SO4 activation (3 N)	3.7 (3.6–3.9) ± 0.1	1.9 (1.6–2.1) ± 0.2	0	26.7 (24.9–29.8) ± 2.2	116.2 (107.2–126.7.5) ± 10.1
Thermic activation (900°C)	6.5 (6.2–6.7) ± 0.2	3.5 (3.1–3.8) ± 0.3	0.1 (0.7–1.6) ± 0.3	20 (18.7–22.3) ± .1.9	41.9 (37.1–49.1) ± 4.6

Mean (minimum-maximum) ± standard deviation: ; ; .