Characteristics of Heavy Metal Ion Adsorption by Silty Mudstones in Coal Mine Goafs

Table 4

Ranges of adsorption phases at .

		I	II				III
Ions	Parameters	Near-complete adsorption	Absorption attenuation				Zero adsorption
			Strong adsorption	Substrong adsorption	Subweak adsorption	Weak adsorption
Pb(II)	(mg/L)	<983	<1415	<1472	<1530	<1962	>1962
	(mg/L)	<3.32	<26.93	<47.64	<84.27	<492.50	>492.50
		>0.997	>0.981	>0.967	>0.945	>0.749	<0.749
		>0.99	>0.75	>0.50	>0.25	>0.01	<0.01
Cd(II)	(mg/L)	<170	<343	<366	<392	<562	>562
	(mg/L)	<0.90	<10.29	<18.60	<35.36	<196.50	>196.50
		>0.995	>0.970	>0.949	>0.910	>0.650	<0.650
		>0.99	>0.75	>0.50	>0.25	>0.01	<0.01
Cr(III)	(mg/L)	<255	<289	<294	<299	<332	>332
	(mg/L)	<0.34	<2.14	<3.93	<7.17	<38.41	>38.41
		>0.999	>0.993	>0.987	>0.976	>0.884	<0.884
		>0.99	>0.75	>0.50	>0.25	>0.01	<0.01
Mn(II)	(mg/L)	<101	<281	<318	<354	<628	>628
	(mg/L)	<1.40	<15.01	<28.52	<51.32	<310.18	>310.18
		>0.986	>0.947	>0.910	>0.855	>0.506	<0.506
		>0.98	>0.75	>0.50	>0.25	>0.01	<0.01