Laboratory Leaching Tests to Investigate Mobilisation and Recovery of Metals from Geothermal Reservoirs

Table 4

Concentration of the “at risk” elements in each leachate from the batch reaction.

Element	Ag	Co	Ga	Mo	Sb	Sr	V	W	Total “at risk”
Sample	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB
HTLMix + DI water					116.41	51.30			167.71
HTLMix + 0.1 M acetic acid		77.29	17.15		20.41	92.04		67.67	274.56
HTLMix + 0.1 M acetic acid 200°C		26.48	4.00	1.04	656.28	141.60			829.40
HTLMix + 0.013 M mineral acid		3.76		2.64	32.10	84.80		0.24	123.54
HTLMix + 0.13 M mineral acid 100°C		159.07	12.00	17.48	3.49	149.20		0.28	341.52
HTLMix + 0.13 M mineral acid 200°C		979.95	8.00	176.00	7100.00	220.00		7.98	8491.92
HTL315 + DI water		1001.28			71.93				1073.21
HTL315 + 0.1 M acetic acid		1069.75			90.06			91.59	1251.40
HTL319 + DI water					2.41			181.83	184.24
HTL319 + 0.1 M acetic acid								128.04	128.04
HTL321 + 0.013 M mineral acid		11.64		2.60	43.51	101.20			158.95
HTL324 + 0.013 M mineral acid		5.52		0.44	0.16	58.40			64.52

: concentration was under the detection limit.