Comparison on the Surface Structure Properties along with Fe(II) and Mn(II) Removal Characteristics of Rice Husk Ash, Inactive Saccharomyces cerevisiae Powder, and Rice Husk

Table 3

Parameters and kinetic models for Fe(II) and Mn(II) adsorption on three researched adsorbents.

Metal ions	Kinetic models	Parameters	Adsorbents
			RHA	ISP	RH
Fe(II)	Pseudo-first-order	(mg/g)	1.9430	1.7998	1.6000
		(min^−1)	0.0714	0.0691	0.0553
		(mg/g)	2.2182	2.4889	1.7660
			0.9810	0.9710	0.9930
	Pseudo-second-order	(g/mg min)	0.0361	0.0248	0.0260
		(mg/g)	2.2573	2.2321	1.9920
			0.1841	0.1234	0.1033
			0.9950	0.9920	0.9930
Mn(II)	Pseudo-first-order	(mg/g)	1.9360	1.6620	1.5400
		(min^−1)	0.0691	0.0760	0.0829
		(mg/g)	2.4717	3.6308	4.7424
			0.9740	0.9510	0.9240
	Pseudo-second-order	(g/mg^.min)	0.0344	0.0192	0.0156
		(mg/g)	2.2620	2.1790	2.1410
			0.1760	0.0910	0.0720
			0.9970	0.9900	0.9850

Note. The three kinds of adsorbents include the following: rice husk ash, RHA; inactive Saccharomyces cerevisiae powder, ISP; rice husk, RH.