Pilot-scale electro-kinetic remediation of lead polluted field sediments: model designation, numerical simulation, and feasibility evaluation

Environmental Sciences Europe

Table 4 Indexes calculations for ecology risk evaluation after recycling of sediments with Pb content of 346 mg/kg, 300 mg/kg, and 220 mg/kg

EXP	Sample	Soil						Brassica juncea
EXP	Sample	RIE ^a	DDDB ^b	DDSB ^c	IICQ ^d_S	X ^h	Y ^h	QIAP ^e	IICQ ^f_AP	Z ^h	IICQ ^g
Exogenous Pb (346 mg/kg)	1	0.720	1.620	2.212	0.73	0	1	1.79	1.52	1	2.25
	2	0.701	1.574		0.71	0	1	1.92	1.56	1	2.27
	3	0.719	1.616		0.73	0	1	1.84	1.54	1	2.27
	4	0.713	1.604		0.73	0	1	2.07	1.60	1	2.33
IICQ 1–4 (Average value ± standard deviation):								2.28 ± 0.03
Exogenous Pb (300 mg/kg)	5	0.660	1.484	2.308	0.64	0	1	1.64	1.47	1	2.11
	6	0.674	1.515		0.66	0	1	1.48	1.43	1	2.08
	7	0.653	1.469		0.64	0	1	1.23	1.35	1	1.99
	8	0.663	1.492		0.65	0	1	1.34	1.39	1	2.03
IICQ 5–8 (Average value ± standard deviation):								2.05 ± 0.06
Exogenous Pb (220 mg/kg)	9	0.531	1.195	2.249	0.53	0	1	0.95	0.084	0	0.62
	10	0.520	1.168		0.52	0	1	0.89	0.080	0	0.60
	11	0.524	1.178		0.52	0	1	0.71	0.063	0	0.59
	12	0.515	1.159		0.52	0	1	0.84	0.074	0	0.59
IICQ 9–12 (Average value ± standard deviation):								0.60 ± 0.01

EXP	Sample	Brassica pekinensis				Spinacia oleracea L.
EXP	Sample	QIAP	IICQ _AP	Z	IICQ	QIAP	IICQ _AP	Z	IICQ
Exogenous Pb (346 mg/kg)	1	1.27	1.37	1	2.10	1.14	1.33	1	2.06
	2	1.41	1.41	1	2.12	1.27	1.37	1	2.08
	3	1.23	1.36	1	2.09	1.18	1.34	1	2.08
	4	1.48	1.43	1	2.16	1.05	1.31	1	2.03
IICQ 1–4 (average value ± standard deviation):		2.12 ± 0.03				2.06 ± 0.02
Exogenous Pb (300 mg/kg)	5	1.14	1.33	1	1.97	0.78	0.067	0	0.71
	6	1.18	1.34	1	2.00	0.95	0.082	0	0.74
	7	0.95	0.082	0	0.72	1.10	0.075	0	0.73
	8	1.27	1.36	1	2.01	0.84	0.073	0	0.72
IICQ 5–8 (average value ± standard deviation):		1.67 ± 0.64				0.73 ± 0.01
Exogenous Pb (220 mg/kg)	9	0.63	0.056	0	0.59	0.63	0.056	0	0.59
	10	0.78	0.069	0	0.59	0.45	0.040	0	0.56
	11	0.84	0.074	0	0.60	0.55	0.049	0	0.57
	12	0.89	0.080	0	0.60	0.71	0.063	0	0.58
IICQ 9–12 (average value ± standard deviation):		0.59 ± 0.01				0.57 ± 0.01

^aRelative impact equivalent (RIE)
^bDeviation degree of determination concentration from the background value (DDDB)
^cDeviation degree of soil standard from the background value (DDSB)
^dInfluence index of comprehensive quality for soil (IICQ_S)
^eQuality index of agricultural product (QIAP)
^fInfluence index of comprehensive quality for agricultural product (IICQ_AP)
^gInfluence index of comprehensive quality for agro-ecosystem (IICQ)
^hDefined values for describing the Pb contents in soils and vegetables (X, Y, Z)