A Study on Astrazon Black AFDL Dye Adsorption onto Vietnamese Diatomite

Table 5

Results of piecewise linear regression for the three linear segments in the Webber plots for different initial concentration. The values in parentheses are 95% confidence limits.

Conc. (mg L^−1)	First-segment linear line		Second-segment linear line		Third-segment linear line
	(min^−1)	(mg g^−1 min^−1)	(min^−1)	(mg g^−1 min^−1)	(min^−1)	(mg g^−1 min^−1)
150	53.44	3.78	60.18	1.16	68.70	0.16
	(50.05–56.82)		(58.94–61.43)		(68.07–69.33)
200	55.26	11.23	78.44	1.469	89.05	0.28
	(42.42–68.10)		(76.76–80.10)		(88.02–90.08)
300	86.10	4.84	85.29	5.11	97.24	1.58
	(83.23–88.96)		(83.00–87.59)		(94.52–99.96)
400	81.30	14.95	97.46	6.71	127.03	0.75
	(68.15–94.46)		(94.64–100.31)		(124.37–129.68)
600	94.53	2.971	122.24	1.47	91.22	7.80
	(86.89–102.17)		(118.06–126.43)		(88.23–94.22)
800	78.46	19.75	110.82	6.02	142.53	0.14
	(60.58–96.34)		(107.28–114.35)		(138.00–147.06)
900	79.45	16.18	100.26	6.819	127.32	0.63
	(70.69–88.22)		(97.24–103.28)		(122.86–131.76)