Utilization to Remove Pb (II) Ions from Aqueous Environments Using Waste Fish Bones by Ion Exchange

Table 5

Pseudo-first and second-order kinetic constants of Pb (II) at different temperatures and concentrations.

	𝑞𝑒,exp; (mg/g)	Pseudo-first-order			Pseudo-second-order
		𝑞𝑒,theo; (mg/g)	𝑘1; (h^−1)	𝑅^2	𝑞𝑒,theo; (mg/g)	𝑘2; (g/mg·h)	ℎ𝑖; (mg/g·h)	𝑅^2
pH 5,; 1667 mg Pb^+2/L
20°C	153.37	135.08	0.175	0.994	170.25	1.87×10^−3	54.08	0.998
30°C	216.32	185.78	0.220	0.979	234.66	1.91×10^−3	105.35	0.998
40°C	267.93	200.81	0.214	0.986	285.31	2.02×10^−3	164.71	0.999
50°C	323.21	214.99	0.216	0.981	339.95	2.13×10^−3	246.18	0.999
pH 5, 20°C
50 mg/L	12.56	11.64	0.188	0.974	13.55	2.87×10^−2	5.26	0.995
417 mg/L	86.05	76.41	0.208	0.996	95.45	3.76×10^−3	34.22	0.999
782 mg/L	117.45	114.08	0.201	0.980	129.92	2.56×10^−3	43.19	0.995
1667 mg/L	153.37	135.08	0.175	0.994	170.25	1.87×10^−3	54.08	0.998