Table 1.

Details of physicochemical parameters of the microcosm setup.

Parameters	0_Day	H_4M	H_6M	C_4M	C_6M	C+L_4M	C+L_6M
pH	3.51 ± 0.01	3.60 ± 0.01	4.01 ± 0.01	5.86 ± 0.02	6.37 ± 0.01	6.12 ± 0.01	6.61 ± 0.01
ORP	200.51 ± 0.95	165.7 ± 1.0	140.61 ± 1.55	130.02 ± 1.09	120.23 ± 1.20	125.21 ± 1.15	110.02 ± 1.01
SO42−	7838.20 ± 39.64	6780.78 ± 54.08	4005.88 ± 19.15	4282.33 ± 22.72	1860.21 ± 14.75	720.06 ± 11.31	365.58 ± 22.11
Fe2+	130.89 ± 4.72	202.81 ± 3.57	336.64 ± 12.66	980.37 ± 6.45	628.83 ± 9.08	300.64 ± 4.77	79.29 ± 2.1
Fe	179.10 ± 1.55	300.81 ± 1.0	415.75 ± 1.75	1386.31 ± 1.11	735.13 ± 0.89	320.94 ± 1.10	90.01 ± 1.10
Cu	1.84 ± 0. 07	0.31 ± 0.11	0.28 ± 0.08	0.13 ± 0.06	0.12 ± 0.07	0.18 ± 0.06	0.16 ± 0.05
Zn	1.79 ± 0.33	0.57 ± 0.21	0.46 ± 0.10	0.39 ± 0.10	0.16 ± 0.06	0.14 ± 0.04	0.13 ± 0.05
Ni	0.39 ± 0.11	0.32 ± 0.03	0.28 ± 0.06	0.16 ± 0.06	0.14 ± 0.07	0.16 ± 0.06	0.16 ± 0.07

All the units are represented in ppm except ORP (mV) and pH (SI unit). H, C and C+L denote unamended, cysteine amended and cysteine and lactate amended microcosms while 4M (120 days incubation) and 6M (180 days incubation) represent the time of incubation. The values are represented mean of three independent experiments with standard deviations.