Appendices 5-13 - Nautilus Cares - Nautilus Minerals

Table of Contents
1. Introduction 3
Objectives of this study
2. Methodology 4
2.1 Phase 1: Effect of time experimental conditions 5
2.2 Phase 2: Effect of temperature experimental conditions 5
2.3 Seawater sample preparation 5
2.4 Analytical methods 6
3. Results and Discussion 7
3.1 Characterisation of the centrifuged seawater 7
3.2 Characterisation of 0.45!m filtered seawater 11
3.3 Major cations in seawater elutriates 16
3.4 Dissolved organic carbon in seawater elutriates 16
3.5 Comparison to ANZECC/ARMCANZ (2000) water quality guidelines 20
4. Conclusions 20
5. References 22
Appendix 1: Phase 1: Metal concentrations in 0.45 !m filtered seawater
from 1:10 ore: seawater elutriates at 6 o C. Note:
Concentrations have been corrected for the Blanks and are
therefore net concentrations for each time period.
Appendix 2: Phase 1:Metal concentrations in 0.45 !m filtered seawater
(N/C sw 1 and 2) for elutriation experiments and seawater
blanks.
Appendix 3: Phase 1:Quality control data for seawater metals analyses
Appendix 4: Phase 1: Normalised data for dissolved metals released from
one gram of ore (ng/g ore) into 250ml seawater
Appendix 5: Phase 2: Metal concentrations in 0.45 !m filtered seawater
from 1:10 ore: seawater 180 minute elutriation at 12 o C and
24 o C.
Appendix 6: Phase 2: Quality control data for seawater metals analyses.
Appendix 7: Phase 2: Net metals released and normalised data for dissolved
metals released from one gram of ore (ng/g ore) into 250ml
seawater at 12 and 24 o C
Appendix 8: Metal concentrations in Nautilus ore sample used for Phase 1
and 2 experiments (Analysed by ALS)
2