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

Table 5

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

Element	Al	B	Ba	Ca	Cd	Cr	Cu	Fe	K	Mg	Mn	Na	Ni	Pb	Rb	S	Si	Zn
Sample	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB	PPB
HTLMix + DI water	105		46				7		4684	19,343				418	12		4309
HTLMix + 0.1 M acetic acid	1642			91,652	17		15		3401	51,998	8309		117	871,112	22		14,277	3131
HTLMix + 0.1 M acetic acid 200°C	460		2162	112,006	22		12	13,059	5960	49,950	6996	12,000	71	18,499	15		75,692	6261
HTLMix + 0.013 M mineral acid			970	80,004	2	2		120		32,273	5679	4000	8	80		4001		120
HTLMix + 0.13 M mineral acid 100°C	76,984		958	124,006	1553	1094	34,406	12,103	15,601	112,961	8458	6400	1113	3,676,056	82	4001	81,044	323,065
HTLMix + 0.13 M mineral acid 200°C	29,722		1412		809	304	924	848,648	76,003	62,787	25,897		42,850	805,280	524	232,036	210,993,801	183,156
HTL315 + DI water	5287						3996	40,705			701		27		4		17,198	1922
HTL315 + 0.1 M acetic acid	7412						10,327	56,082			779		31		5		21,004	1115
HTL319 + DI water							11				206				8		5181
HTL319 + 0.1 M acetic acid	3079					36	132	4767			837				31		8822
HTL321 + 0.013 M mineral acid			866	92,005	23	2		8	1200	37,648	6726	3600	6	4		4001		760
HTL324 + 0.013 M mineral acid	26,623		1294	32,002	7	12	13	143,755	2400	22,871	1311	11,600	31	4	6	4001		1992

: concentration was under the detection limit.