Water quality improvements in the Sudbury, Ontario, Canada area related to reduced smelter emissions

1986 ◽  
Vol 31 (3-4) ◽  
pp. 765-774 ◽  
Author(s):  
W. Keller ◽  
J. Roger Pitblado ◽  
N. I. Conroy
Keyword(s):  
Water Quality ◽  
Quality Improvements ◽  
Smelter Emissions

Chemical Responses of Acidic Lakes in the Sudbury, Ontario, Area to Reduced Smelter Emissions, 1981–89

1992 ◽  
Vol 49 (S1) ◽  
pp. 25-32 ◽  
Author(s):  
W. Keller ◽  
J. Roger Pitblado ◽  
J. Carbone
Keyword(s):  
Water Quality ◽  
Temporal Trends ◽  
Strong Support ◽  
Acid Neutralizing Capacity ◽  
Quality Improvements ◽  
Acidic Lakes ◽  
Neutralizing Capacity ◽  
Sulphur Emissions ◽  
Aquatic Acidification ◽  
Smelter Emissions

Monitoring of acidic lakes in the Sudbury, Ontario, area showed that general changes in water quality (increases in pH and acid-neutralizing capacity; decreases in concentrations of SO42−, Ca2+, Mg2+, Al, and Mn) have continued through the mid-1980's, following substantial reductions in sulphur emissions from area smelters in the late 1970's. By the late 1980's, these trends had levelled off, or even reversed in some lakes. No general, temporal trends were evident during the 1980's for concentrations of Cu, Ni, or Zn, metals directly associated with the smelter emissions. The widespread water quality improvements seen in lakes of the Sudbury area provide very strong support for the use of source controls to combat aquatic acidification. However, the fact that many Sudbury area lakes are still highly acidic and metal contaminated demonstrates that additional emission controls, which are being implemented, are essential in this region.

scholarly journals Declining bacteria, lead, and sulphate, and rising pH and oxygen in the lower Mississippi River

AMBIO ◽  
2021 ◽  
Author(s):  
R. Eugene Turner
Keyword(s):  
Water Quality ◽  
Mississippi River ◽  
Pollution Abatement ◽  
National Policy ◽  
Quality Improvements ◽  
Sulfur Dioxide Emissions ◽  
Dramatic Decline ◽  
Before And After ◽  
Lower Mississippi River ◽  
The 1960S

AbstractVarious air and water pollution issues in the US were confronted in the last 60 years using national policy legislation, notably the Clean Water Act and the Clean Air Act. I examine changes in the concentrations of bacteria, oxygen, lead, and sulphate at the terminus of the Mississippi River before and after these pollution abatement efforts. Microbial concentrations increased or were stable from 1909 to 1980 but decreased about 3 orders of magnitude after the 1970s, while the average oxygen content increased. A large decline in lead concentration occurred after the 1960s, along with a less dramatic decline in sulphate concentrations. The pH of the river dropped to a low of 5.8 in 1965 as sulfur dioxide emissions peaked and averaged 8.2 in 2019 after emissions declined. Decades of efforts at a national scale created water quality improvements and are an example for addressing new and existing water quality challenges.

Water quality improvements from implementation of tailwater recovery systems

2018 ◽  
Vol 5 (2) ◽  
pp. 703-713 ◽  
Author(s):  
Austin R. Omer ◽  
B. H. Baker
Keyword(s):  
Water Quality ◽  
Quality Improvements

scholarly journals Analysis and Prediction on Water Quality Improvements by Aquatic Plants in a Storage

2013 ◽  
Vol 13 (6) ◽  
pp. 439-446 ◽  
Author(s):  
Eung Seok Kim ◽  
Kuy Bum Sim ◽  
Gunhui Chung ◽  
Hyun Il Choi
Keyword(s):  
Water Quality ◽  
Aquatic Plants ◽  
Quality Improvements

Effects of Planting Densities on Water Quality Improvements andPontederia cordata’s Physiology

2013 ◽  
Vol 16 (5) ◽  
pp. 469-481
Author(s):  
Xiao-Ming Lu ◽  
Peng-Zhen Lu ◽  
Jian-jun Chen
Keyword(s):  
Water Quality ◽  
Quality Improvements
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