Table 4.

Average concentration of pseudo total, inhalable and gastric bioaccessible, carbonate and iron oxides bound in tailing sample fractions compared to some reported concentrations

Particle fraction μm	Analysis	As, mg kg−1	Cd, mg kg−1	Pb, mg kg−1	Zn, mg kg−1
<20	Ptotala	35 961 ± 22 946	44 ± 22	3326 ± 1484	4678 ± 2140
	INBAb	343 ± 85	2.8 ± 1	44 ± 20	9.5 ± 3.3
	GABAc	743 ± 215	19.2 ± 9.5	1396 ± 565	2047 ± 1485
	Carbonatesd	42.9 ± 50	11 ± 3	234 ± 118	263 ± 98
	Fe oxidese	4234 ± 5090	7.7 ± 5.9	333 ± 237	2602 ± 1487
50–74	Ptotal	40 236 ± 23 255	38 ± 18	1956 ± 811	2780 ± 1043
	INBA	281 ± 76	2.0 ± 0.8	30.6 ± 15	6.7 ± 1.8
	GABA	492 ± 177	10.7 ± 4.5	732 ± 399	891 ± 448
	Carbonates	40 ± 27	4.9 ± 2	92 ± 51	188 ± 209
	Fe oxides	1688 ± 1675	7.1 ± 4	243 ± 166	1166 ± 477
74–100	Ptotal	24 419 ± 17 560	25 ± 11	1762 ± 820	2900 ± 1192
	INBA	259 ± 72	1.6 ± 0.8	29 ± 17	6.8 ± 2.6
	GABA	389 ± 145	9.6 ± 3.9	588 ± 277	935 ± 537
	Carbonates	46 ± 40	4.4 ± 2.6	72 ± 47	116 ± 56
	Fe oxides	1380 ± 1974	6.4 ± 3.9	172 ± 112	841 ± 348
Reference	Analysis	As, mg kg−1	Cd, mg kg−1	Pb, mg kg−1	Zn, mg kg−1
SEMARNAT46	Agr/Ind	22/260	37/450	22/260	400/800
CCME47	Soil	12	22	260	360
USEPA48	Soil	0.11	200	400/1100	0.48
Kastury et al.8	Total	31.6	6.9	13 682	4873
	fPUBA	9.1 ± 0.5		122 ± 3.8
Guney et al.11	PUBA	1549	2.3	380	2.4
	GABA	573	—	—
Drahota et al.14	PUBA	471–7905	—	≤0.5	≤8
	GABA	7–795	—	0.5–23	6–3260
Caboche et al.27	PUBAf	—	56.9 ± 3.4	14.5 ± 0.9	75.5 ± 3.5
Pelfrene et al.50	BCR723	—	DLg	7.8 ± 0.6	44.6 ± 0.8
	NIST27106	—	86 ± 0.28	7.9 ± 0.4	23.7 ± 0.1
	NIST1648a	—	45.2 ± 4	9.1 ± 0.9	43.2 ± 0.2

^aPtotal = pseudo total concentration.

^bINBA = inhaled bioaccessibility.

^cGAPA = gastric bioaccessibility.

^dCarbonates = bound to carbonates.

^eFe oxides = bound to iron oxides.

^fPUBA = pulmonary bioaccessibility.

^gDL = at the detection limits.