Download - Water Quality Monitoring
Water Quality Monitoring
Nush, Mai and Vandy
Mining & Water QualityDeforestation & Water Quality
Conclusion & Recommendation
Content
Mercury and Cyanide from Gold Mining
Used of Mercury and Cyanide in Gold Mining
Gold will dissolve in liquid mercury and this process was extensively used for recovery of gold from ground area
Cyanide solutions used to dissolve and extract gold
Mercury and Cyanide often eroded into streams or were deposited directly into streams
Mercury and Cyanide is likewise harmful to wildlife such as mammals, birds, and fish.
Biomagnifications
Mercury and Cyanide Legacy from Historic Mines
• Elevated concentrations of mercury and cyanide in sediments
• Elevated concentrations of mercury and cyanide in fish, birds and other wildlife
• Restrictions on the amount of fish that should be consumed by humans
Toxic Issues with Mercury and Cyanide
• Neurotoxicity
• Birth defects
• Kidney function
Byproduct Mercury Production
The Chemistry
Au + O2 + CN- Au(CN)2- (water soluble)
Hg + O2 + CN- Hg(CN)2 + Hg(CN)42-
(water soluble)
Both the gold and mercury cyanide complexes are trapped on carbon and recovered during processing
How is Byproduct effected to human health
Biomagnifications in aquatic life to human
Release to ground water
Evaporated to the atmosphere
How is Byproduct Managed
Sold or transferred to three primary mercury recyclers
Management and transfer is conducted in a safe and reliable manner
The Cause of harmful water quality
Deforestation Lo
gging
Plantation
Impacts of Deforestation
Less water and Fish in dry season
Water Qualit
y?E FG
- WQ still questionable: Lack of equipment & Instruments
- Long term effect unidentified: recovery plan after the project completion
-
Conclusion
Recommendations More mercury and cyanide should be
required for water quality monitoring.
Should cover the bottom of the reservoir pond by plastic or set up the proper pond to reduce the chance that Mercury and Cyanide will be release to ground water
Do not allow people to do fishing and eat any aquatic life from that pond
Try to reuse that water again in the processing
Recommendations Law enforcement to combat with illegal
logging
Discourage shifting cultivation
Provide seeding and technical support to the marginalized
Ground and surface water check must be implementing systematic
Raising awareness on forestation among children
Providing equipment and technical supports
Provide marketable seeds/stem
Any questions?
Thank you!