Bioprecipitation of Calcium Carbonate Crystals by Bacteria Isolated from Saline Environments Grown in Culture Media Amended with Seawater and Real Brine

Table 6

Saturation index values (SI) for mineral formation in culture solid medium (M1, SM1, SM2, SM3, SM4, SM%, and SM6) and liquid medium SM2 inoculated with strains S3 and M3. All of the culture media contained added artificial brine.

Mineral	Solid medium							Liquid medium
	M1	SM1	SM2	SM3	SM4	SM5	SM6	S3	M3
Anhydrite	−0.70	−0.72	−0.69	−0.65	−0.64	−0.65	−0.65	−0.63	−0.63
Aragonite	2.43	2.25	2.15	1.87	1.80	1.95	2.01	1.63	1.68
Calcite	2.57	2.40	2.29	2.01	1.94	2.10	2.15	1.78	1.83
Dolomite	5.47	5.69	5.47	4.91	4.77	5.08	5.19	3.23	3.63
Dolomite (d)	4.92	5.14	4.92	4.36	4.22	4.53	4.64	2.68	3.08
Gypsum	−0.49	−0.52	−0.49	−0.45	−0.44	−0.45	−0.45	−0.43	−0.43
Huntite	6.92	7.92	7.49	6.36	6.08	6.72	6.93	1.79	2.88
Hydroxyapatite	13.41	12.18	11.85	11.65	11.14	—	—	11.4	11.41
Magnesite	2.32	2.71	2.60	2.32	2.25	2.41	2.46	0.87	1.22
Monohydrocalcite	−1.83	−2.00	−2.11	−2.39	−2.46	−2.3	−2.25	−2.62	−2.57
Nesquehonite	−0.12	0.26	0.16	−0.12	−0.19	−0.03	0.02	−1.57	−1.22
Struvite	2.39	2.64	2.38	1.99	1.63	—	—	0.62	0.95
Vaterite	18.7	18.53	18.42	18.14	18.07	18.22	18.28	17.91	17.95