Dissolution of Metals from Biosolid-Treated Soils by Organic Acid Mixtures

Table 12

The slope^† of metal extracted from the biosolid-treated Romona soil (1,080 Mg ha⁻¹) by 0.1 M organic acid mixtures according to (3).

Element
Cd	6.68	3.40	1.75	0.91	0.48	0.25	0.10	0.05
Cr	5.84	3.56	1.91	1.09	0.63	0.40	0.20	0.11
Cu	81.2	42.4	22.5	11.9	6.30	3.30	1.34	0.70
Ni	64.4	33.6	18.0	9.40	4.88	2.60	0.97	0.50
Pb	3.08	1.64	0.87	0.51	0.27	0.24	0.08	0.05
Zn	820	422	220	113	58.8	30.6	11.5	5.88

Values of , , , , , , or indicate the slopes of metal extracted at 15 min., 30 min., 1 hr, 2 hrs., 4 hrs., 8 hrs., 24 hrs., and 48 hrs.